diff --git a/core/tests/test_user.py b/core/tests/test_user.py
index 752405b2..0a8a3b7b 100644
--- a/core/tests/test_user.py
+++ b/core/tests/test_user.py
@@ -200,7 +200,11 @@ class TestFilterInactive(TestCase):
         ]
         sale_recipe.make(customer=cls.users[3].customer, date=time_active)
         baker.make(
-            Refilling, customer=cls.users[4].customer, date=time_active, counter=counter
+            Refilling,
+            customer=cls.users[4].customer,
+            date=time_active,
+            counter=counter,
+            amount=1,
         )
         sale_recipe.make(customer=cls.users[5].customer, date=time_inactive)
 
@@ -455,7 +459,9 @@ def test_user_preferences(client: Client):
 @pytest.mark.django_db
 def test_user_stats(client: Client):
     user = subscriber_user.make()
-    baker.make(Refilling, customer=user.customer, amount=99999)
+    baker.make(
+        Refilling, customer=user.customer, amount=settings.SITH_ACCOUNT_MAX_MONEY
+    )
     bars = [b[0] for b in settings.SITH_COUNTER_BARS]
     baker.make(
         Permanency,
diff --git a/counter/fields.py b/counter/fields.py
index a212059d..caf3a584 100644
--- a/counter/fields.py
+++ b/counter/fields.py
@@ -1,22 +1,68 @@
 from decimal import Decimal
 
 from django.conf import settings
+from django.core import checks
+from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
+from django.utils.functional import cached_property
 
 
 class CurrencyField(models.DecimalField):
     """Custom database field used for currency."""
 
-    def __init__(self, *args, **kwargs):
-        kwargs["max_digits"] = 12
-        kwargs["decimal_places"] = 2
-        super().__init__(*args, **kwargs)
+    def __init__(
+        self, verbose_name=None, name=None, min_value=None, max_value=None, **kwargs
+    ):
+        kwargs.update({"max_digits": 12, "decimal_places": 2})
+        self.min_value = min_value
+        self.max_value = max_value
+        super().__init__(verbose_name, name, **kwargs)
 
     def to_python(self, value):
         if value is None:
             return None
         return super().to_python(value).quantize(Decimal("0.01"))
 
+    @cached_property
+    def validators(self):
+        res = []
+        if self.max_value:
+            res.append(MaxValueValidator(self.max_value))
+        if self.min_value:
+            res.append(MinValueValidator(self.min_value))
+        return [*super().validators, *res]
+
+    def check(self, **kwargs):  # pragma: no cover
+        # this is executed during runserver, but won't run in prod
+        errors = super().check(**kwargs)
+        for name, val in ("min_value", self.min_value), ("max_value", self.max_value):
+            if not val:
+                continue
+            try:
+                float(val)
+            except ValueError:
+                errors.append(
+                    checks.Error(
+                        f"CurrencyField.{name} must be a valid float",
+                        obj=self,
+                        id="sith.E001",
+                    )
+                )
+        return errors
+
+    def formfield(self, **kwargs):
+        return super().formfield(
+            **{"min_value": self.min_value, "max_value": self.max_value, **kwargs}
+        )
+
+    def deconstruct(self):
+        name, path, args, kwargs = super().deconstruct()
+        if self.min_value is not None:
+            kwargs["min_value"] = self.min_value
+        if self.max_value is not None:
+            kwargs["max_value"] = self.max_value
+        return name, path, args, kwargs
+
 
 if settings.TESTING:
     from model_bakery import baker
diff --git a/counter/forms.py b/counter/forms.py
index 6641a80e..cd99c95a 100644
--- a/counter/forms.py
+++ b/counter/forms.py
@@ -3,13 +3,16 @@ import math
 import uuid
 from collections import defaultdict
 from datetime import date, datetime, timezone
+from typing import ClassVar
 
 from dateutil.relativedelta import relativedelta
 from django import forms
+from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.db.models import Exists, OuterRef, Q
 from django.forms import BaseModelFormSet
 from django.http import HttpRequest
+from django.utils.functional import cached_property
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _
 from django_celery_beat.models import ClockedSchedule
@@ -168,18 +171,19 @@ class RefillForm(forms.ModelForm):
 
     error_css_class = "error"
     required_css_class = "required"
-    amount = forms.FloatField(
-        min_value=0, widget=forms.NumberInput(attrs={"class": "focus"})
-    )
 
     class Meta:
         model = Refilling
         fields = ["amount", "payment_method"]
         widgets = {"payment_method": forms.RadioSelect}
 
-    def __init__(self, *args, **kwargs):
+    def __init__(
+        self, *args, counter: Counter, operator: User, customer: Customer, **kwargs
+    ):
         super().__init__(*args, **kwargs)
-
+        max_value = settings.SITH_ACCOUNT_MAX_MONEY - customer.amount
+        # server-side max_value validation is done by Refilling.clean
+        self.fields["amount"].widget.attrs["max"] = max_value
         self.fields["payment_method"].choices = (
             method
             for method in self.fields["payment_method"].choices
@@ -187,6 +191,9 @@ class RefillForm(forms.ModelForm):
         )
         if self.fields["payment_method"].initial not in self.allowed_refilling_methods:
             self.fields["payment_method"].initial = self.allowed_refilling_methods[0]
+        self.instance.counter = counter
+        self.instance.operator = operator
+        self.instance.customer = customer
 
 
 class CounterEditForm(forms.ModelForm):
@@ -560,16 +567,7 @@ class BasketItemForm(forms.Form):
     quantity = forms.IntegerField(min_value=1, required=True)
     price_id = forms.IntegerField(min_value=0, required=True)
 
-    def __init__(
-        self,
-        customer: Customer,
-        counter: Counter,
-        allowed_prices: dict[int, Price],
-        *args,
-        **kwargs,
-    ):
-        self.customer = customer  # Used by formset
-        self.counter = counter  # Used by formset
+    def __init__(self, allowed_prices: dict[int, Price], *args, **kwargs):
         self.allowed_prices = allowed_prices
         super().__init__(*args, **kwargs)
 
@@ -604,6 +602,15 @@ class BasketItemForm(forms.Form):
 
 
 class BaseBasketForm(forms.BaseFormSet):
+    # Minimum amount of money there must be on the account after the transaction
+    # If None, the min balance check is skipped
+    min_result_balance: ClassVar[int | None] = 0
+
+    def __init__(self, *args, customer: Customer, counter: Counter, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.customer = customer
+        self.counter = counter
+
     def clean(self):
         self.forms = [form for form in self.forms if form.cleaned_data != {}]
 
@@ -612,8 +619,8 @@ class BaseBasketForm(forms.BaseFormSet):
 
         self._check_forms_have_errors()
         self._check_product_are_unique()
-        self._check_recorded_products(self[0].customer)
-        self._check_enough_money(self[0].counter, self[0].customer)
+        self._check_recorded_products()
+        self._check_account_balance()
 
     def _check_forms_have_errors(self):
         if any(len(form.errors) > 0 for form in self):
@@ -624,12 +631,35 @@ class BaseBasketForm(forms.BaseFormSet):
         if len(price_ids) != len(self.forms):
             raise forms.ValidationError(_("Duplicated product entries."))
 
-    def _check_enough_money(self, counter: Counter, customer: Customer):
-        self.total_price = sum([data["total_price"] for data in self.cleaned_data])
-        if self.total_price > customer.amount:
-            raise forms.ValidationError(_("Not enough money"))
+    @cached_property
+    def total_price(self):
+        refill = settings.SITH_COUNTER_PRODUCTTYPE_REFILLING
+        total_other = sum(
+            form.cleaned_data["total_price"]
+            for form in self.forms
+            if form.price.product.product_type_id != refill
+        )
+        total_refill = sum(
+            form.cleaned_data["total_price"]
+            for form in self.forms
+            if form.price.product.product_type_id == refill
+        )
+        return total_other - total_refill
 
-    def _check_recorded_products(self, customer: Customer):
+    def _check_account_balance(self):
+        result_balance = self.customer.amount - self.total_price
+        if (
+            self.min_result_balance is not None
+            and self.min_result_balance > result_balance
+        ):
+            raise forms.ValidationError(_("Not enough money"))
+        if result_balance > settings.SITH_ACCOUNT_MAX_MONEY:
+            raise ValidationError(
+                _("There cannot be more than %(money)d€ on an AE account")
+                % {"money": settings.SITH_ACCOUNT_MAX_MONEY}
+            )
+
+    def _check_recorded_products(self):
         """Check for, among other things, ecocups and pitchers"""
         items = defaultdict(int)
         for form in self.forms:
@@ -638,7 +668,7 @@ class BaseBasketForm(forms.BaseFormSet):
         returnables = list(
             ReturnableProduct.objects.filter(
                 Q(product_id__in=ids) | Q(returned_product_id__in=ids)
-            ).annotate_balance_for(customer)
+            ).annotate_balance_for(self.customer)
         )
         limit_reached = []
         for returnable in returnables:
diff --git a/counter/migrations/0042_alter_customer_amount_alter_refilling_amount.py b/counter/migrations/0042_alter_customer_amount_alter_refilling_amount.py
new file mode 100644
index 00000000..7c0c6625
--- /dev/null
+++ b/counter/migrations/0042_alter_customer_amount_alter_refilling_amount.py
@@ -0,0 +1,30 @@
+# Generated by Django 5.2.15 on 2026-06-07 12:08
+
+from django.db import migrations
+
+import counter.fields
+
+
+class Migration(migrations.Migration):
+    dependencies = [("counter", "0041_alter_billinginfo_country_and_more")]
+
+    operations = [
+        migrations.AlterField(
+            model_name="customer",
+            name="amount",
+            field=counter.fields.CurrencyField(
+                decimal_places=2,
+                default=0,
+                max_digits=12,
+                max_value=250,
+                verbose_name="amount",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="refilling",
+            name="amount",
+            field=counter.fields.CurrencyField(
+                decimal_places=2, max_digits=12, min_value=0.01, verbose_name="amount"
+            ),
+        ),
+    ]
diff --git a/counter/models.py b/counter/models.py
index 1907d2fb..cda5ac1b 100644
--- a/counter/models.py
+++ b/counter/models.py
@@ -28,7 +28,7 @@ from dict2xml import dict2xml
 from django.conf import settings
 from django.core.validators import MinLengthValidator
 from django.db import models
-from django.db.models import Exists, F, OuterRef, Q, QuerySet, Subquery, Sum, Value
+from django.db.models import Exists, F, Max, OuterRef, Q, QuerySet, Subquery, Sum, Value
 from django.db.models.functions import Coalesce, Concat, Length
 from django.forms import ValidationError
 from django.urls import reverse
@@ -99,7 +99,9 @@ class Customer(models.Model):
 
     user = models.OneToOneField(User, primary_key=True, on_delete=models.CASCADE)
     account_id = models.CharField(_("account id"), max_length=10, unique=True)
-    amount = CurrencyField(_("amount"), default=0)
+    amount: CurrencyField = CurrencyField(
+        _("amount"), max_value=settings.SITH_ACCOUNT_MAX_MONEY, default=0
+    )
 
     objects = CustomerQuerySet.as_manager()
 
@@ -156,13 +158,15 @@ class Customer(models.Model):
             unique_fields=["customer", "returnable"],
         )
 
-    @property
+    @cached_property
     def can_buy(self) -> bool:
         """Check if whether this customer has the right to purchase any item."""
-        subscription = self.user.subscriptions.order_by("subscription_end").last()
-        if subscription is None:
+        subscription_end = self.user.subscriptions.aggregate(
+            res=Max("subscription_end")
+        ).get("res")
+        if subscription_end is None:
             return False
-        return (date.today() - subscription.subscription_end) < timedelta(days=90)
+        return (date.today() - subscription_end) < timedelta(days=90)
 
     @classmethod
     def get_or_create(cls, user: User) -> tuple[Customer, bool]:
@@ -823,7 +827,7 @@ class Refilling(models.Model):
     counter = models.ForeignKey(
         Counter, related_name="refillings", blank=False, on_delete=models.CASCADE
     )
-    amount = CurrencyField(_("amount"))
+    amount: CurrencyField = CurrencyField(_("amount"), min_value=0.01)
     operator = models.ForeignKey(
         User,
         related_name="refillings_as_operator",
@@ -877,6 +881,14 @@ class Refilling(models.Model):
             return False
         return user.is_owner(self.counter) and self.payment_method != "CARD"
 
+    def clean(self):
+        super().clean()
+        if (self.amount + self.customer.amount) > settings.SITH_ACCOUNT_MAX_MONEY:
+            raise ValidationError(
+                _("There cannot be more than %(money)d€ on an AE account")
+                % {"money": settings.SITH_ACCOUNT_MAX_MONEY}
+            )
+
     def delete(self, *args, **kwargs):
         self.customer.amount -= self.amount
         self.customer.save()
diff --git a/counter/static/bundled/counter/components/counter-product-select-index.ts b/counter/static/bundled/counter/components/counter-product-select-index.ts
index d4e96a81..433ae9f9 100644
--- a/counter/static/bundled/counter/components/counter-product-select-index.ts
+++ b/counter/static/bundled/counter/components/counter-product-select-index.ts
@@ -6,7 +6,7 @@ const productParsingRegex = /^(\d+x)?(.*)/i;
 const codeParsingRegex = / \((\w+)\)$/;
 
 function parseProduct(query: string): [number, string] {
-  const parsed = productParsingRegex.exec(query);
+  const parsed = productParsingRegex.exec(query) as RegExpExecArray;
   return [Number.parseInt(parsed[1] || "1", 10), parsed[2]];
 }
 
diff --git a/counter/static/bundled/counter/counter-click-index.ts b/counter/static/bundled/counter/counter-click-index.ts
index 7228f067..5504cd12 100644
--- a/counter/static/bundled/counter/counter-click-index.ts
+++ b/counter/static/bundled/counter/counter-click-index.ts
@@ -3,7 +3,6 @@ import { BasketItem } from "#counter:counter/basket";
 import type {
   CounterConfig,
   CounterItem,
-  ErrorMessage,
   ProductFormula,
 } from "#counter:counter/types";
 import type { CounterProductSelect } from "./components/counter-product-select-index";
@@ -24,7 +23,7 @@ document.addEventListener("alpine:init", () => {
         }
       }
 
-      this.codeField = this.$refs.codeField;
+      this.codeField = this.$refs.codeField as CounterProductSelect;
       this.codeField.widget.hook("after", "onOptionSelect", () => {
         this.handleCode();
       });
@@ -34,14 +33,14 @@ document.addEventListener("alpine:init", () => {
       // of a formset so we dynamically apply it here
       this.$refs.basketManagementForm
         .querySelector("#id_form-TOTAL_FORMS")
-        .setAttribute(":value", "getBasketSize()");
+        ?.setAttribute(":value", "getBasketSize()");
     },
 
     removeFromBasket(id: string) {
       delete this.basket[id];
     },
 
-    addToBasket(id: string, quantity: number): ErrorMessage {
+    addToBasket(id: string, quantity: number) {
       const item: BasketItem =
         this.basket[id] || new BasketItem(config.products[id], 0);
 
@@ -50,7 +49,7 @@ document.addEventListener("alpine:init", () => {
 
       if (item.quantity <= 0) {
         delete this.basket[id];
-        return "";
+        return;
       }
 
       this.basket[id] = item;
@@ -72,7 +71,7 @@ document.addEventListener("alpine:init", () => {
       const products = new Set(
         Object.values(this.basket).map((item: BasketItem) => item.product.productId),
       );
-      const formula: ProductFormula = config.formulas.find((f: ProductFormula) => {
+      const formula = config.formulas.find((f: ProductFormula) => {
         return f.products.every((p: number) => products.has(p));
       });
       if (formula === undefined) {
@@ -80,9 +79,13 @@ document.addEventListener("alpine:init", () => {
       }
       // Now that the formula is found, remove the items composing it from the basket
       for (const product of formula.products) {
-        const key = Object.entries(this.basket).find(
+        const item = Object.entries(this.basket).find(
           ([_, i]: [string, BasketItem]) => i.product.productId === product,
-        )[0];
+        );
+        if (item === undefined) {
+          continue;
+        }
+        const key = item[0];
         this.basket[key].quantity -= 1;
         if (this.basket[key].quantity <= 0) {
           this.removeFromBasket(key);
@@ -92,7 +95,7 @@ document.addEventListener("alpine:init", () => {
       const result = Object.values(config.products)
         .filter((item: CounterItem) => item.productId === formula.result)
         .reduce((acc, curr) => (acc.price.amount < curr.price.amount ? acc : curr));
-      this.addToBasket(result.price.id, 1);
+      this.addToBasket(result.price.id.toString(), 1);
       this.alertMessage.display(
         interpolate(
           gettext("Formula %(formula)s applied"),
@@ -119,14 +122,18 @@ document.addEventListener("alpine:init", () => {
     },
 
     onRefillingSuccess(event: CustomEvent) {
-      if (event.type !== "htmx:after-request" || event.detail.failed) {
+      if (
+        event.type !== "htmx:after-swap" ||
+        event.detail.failed ||
+        event.detail.elt.querySelector(".errorlist")
+      ) {
         return;
       }
       this.customerBalance += Number.parseFloat(
         (event.detail.target.querySelector("#id_amount") as HTMLInputElement).value,
       );
-      document.getElementById("selling-accordion").setAttribute("open", "");
-      this.codeField.widget.focus();
+      document.getElementById("selling-accordion")?.setAttribute("open", "");
+      this.codeField?.widget.focus();
     },
 
     finish() {
@@ -136,7 +143,7 @@ document.addEventListener("alpine:init", () => {
         });
         return;
       }
-      this.$refs.basketForm.submit();
+      (this.$refs.basketForm as HTMLFormElement).submit();
     },
 
     cancel() {
@@ -144,6 +151,8 @@ document.addEventListener("alpine:init", () => {
     },
 
     handleCode() {
+      if (!this.codeField) throw Error("Unexpected null codeField.");
+
       const [quantity, code] = this.codeField.getSelectedProduct() as [number, string];
 
       if (this.codeField.getOperationCodes().includes(code.toUpperCase())) {
diff --git a/counter/templates/counter/counter_click.jinja b/counter/templates/counter/counter_click.jinja
index e93b1110..d18f025e 100644
--- a/counter/templates/counter/counter_click.jinja
+++ b/counter/templates/counter/counter_click.jinja
@@ -176,13 +176,17 @@
           </form>
         </div>
       </details>
-      <details class="accordion" name="selling">
+      <details
+        class="accordion"
+        name="selling"
+        @toggle="if ($event.newState === 'open') $el.querySelector('input[type=number]')?.focus()"
+      >
         <summary>{% trans %}Refilling{% endtrans %}</summary>
         {% if object.type == "BAR" %}
           {% if refilling_fragment %}
             <div
               class="accordion-content"
-              @htmx:after-request="onRefillingSuccess"
+              @htmx:after-swap="onRefillingSuccess"
             >
               {{ refilling_fragment }}
             </div>
diff --git a/counter/tests/test_counter.py b/counter/tests/test_counter.py
index aa771b25..69f3bff6 100644
--- a/counter/tests/test_counter.py
+++ b/counter/tests/test_counter.py
@@ -144,6 +144,8 @@ class TestRefilling(TestFullClickBase):
         assert self.updated_amount(self.customer) == 0
 
     def test_refilling_no_refer_fail(self):
+        """Check that the refill fails is the HTTP_REFERER header is missing"""
+
         def refill():
             return self.client.post(
                 reverse(
@@ -157,13 +159,13 @@ class TestRefilling(TestFullClickBase):
             )
 
         self.client.force_login(self.club_admin)
-        assert refill()
+        assert refill().status_code == 403
 
         self.client.force_login(self.root)
-        assert refill()
+        assert refill().status_code == 403
 
         self.client.force_login(self.subscriber)
-        assert refill()
+        assert refill().status_code == 403
 
         assert self.updated_amount(self.customer) == 0
 
@@ -199,6 +201,17 @@ class TestRefilling(TestFullClickBase):
             == 404
         )
 
+    def test_refilling_above_limit_fails(self):
+        """Test that it's forbidden to refill a customer above the limit."""
+        self.login_in_bar()
+        limit = settings.SITH_ACCOUNT_MAX_MONEY
+        # create a refilling to check that current balance is taken into account
+        baker.make(Refilling, customer=self.customer.customer, amount=limit // 2)
+        response = self.refill_user(self.customer, self.counter, (limit // 2) + 1)
+        assert response.status_code == 200  # no redirect = failure
+        self.customer.customer.refresh_from_db()
+        assert self.updated_amount(self.customer) == limit // 2
+
     def test_refilling_counter_success(self):
         self.login_in_bar()
 
@@ -522,6 +535,19 @@ class TestCounterClick(TestFullClickBase):
 
         assert self.updated_amount(self.customer) == Decimal(10)
 
+    def test_unrecord_above_limit_fails(self):
+        """Test that it's forbidden to give back a recorded product
+        if it puts the account balance above the limit.
+        """
+        self.login_in_bar()
+        limit = settings.SITH_ACCOUNT_MAX_MONEY
+        # put the account balance just at the limit
+        baker.make(Refilling, customer=self.customer.customer, amount=limit)
+        response = self.submit_basket(self.customer, [BasketItem(self.dcons.id, 1)])
+        assert response.status_code == 200  # no redirect = failure
+        self.customer.customer.refresh_from_db()
+        assert self.updated_amount(self.customer) == limit
+
     def test_annotate_has_barman_queryset(self):
         """Test if the custom queryset method `annotate_has_barman` works as intended."""
         counters = Counter.objects.annotate_has_barman(self.barmen)
diff --git a/counter/tests/test_customer.py b/counter/tests/test_customer.py
index 5a194824..ca1b2b85 100644
--- a/counter/tests/test_customer.py
+++ b/counter/tests/test_customer.py
@@ -15,6 +15,7 @@ from core.models import User
 from counter.baker_recipes import product_recipe, refill_recipe, sale_recipe
 from counter.models import (
     Counter,
+    CounterSellers,
     Customer,
     Refilling,
     ReturnableProduct,
@@ -38,7 +39,7 @@ class TestStudentCard(TestCase):
         cls.subscriber = subscriber_user.make()
 
         cls.counter = baker.make(Counter, type="BAR")
-        cls.counter.sellers.add(cls.barmen)
+        CounterSellers.objects.create(counter=cls.counter, user=cls.barmen)
 
         cls.club_counter = baker.make(Counter)
         role = baker.make(ClubRole, club=cls.club_counter.club, is_board=True)
diff --git a/counter/views/click.py b/counter/views/click.py
index 949031c8..9ec678ae 100644
--- a/counter/views/click.py
+++ b/counter/views/click.py
@@ -24,7 +24,7 @@ from django.shortcuts import get_object_or_404, redirect, resolve_url
 from django.urls import reverse
 from django.utils.safestring import SafeString
 from django.utils.translation import gettext as _
-from django.views.generic import FormView
+from django.views.generic import CreateView, FormView
 from django.views.generic.detail import SingleObjectMixin
 from ninja.main import HttpRequest
 
@@ -32,7 +32,14 @@ from core.auth.mixins import CanViewMixin
 from core.models import User
 from core.views.mixins import FragmentMixin, UseFragmentsMixin
 from counter.forms import BasketForm, RefillForm
-from counter.models import Counter, Customer, ProductFormula, ReturnableProduct, Selling
+from counter.models import (
+    Counter,
+    Customer,
+    ProductFormula,
+    Refilling,
+    ReturnableProduct,
+    Selling,
+)
 from counter.utils import is_logged_in_counter
 from counter.views.mixins import CounterTabsMixin
 from counter.views.student_card import StudentCardFormFragment
@@ -66,13 +73,13 @@ class CounterClick(
     current_tab = "counter"
 
     def get_form_kwargs(self):
-        kwargs = super().get_form_kwargs()
-        kwargs["form_kwargs"] = {
+        return super().get_form_kwargs() | {
             "customer": self.customer,
             "counter": self.object,
-            "allowed_prices": {price.id: price for price in self.prices},
+            "form_kwargs": {
+                "allowed_prices": {price.id: price for price in self.prices}
+            },
         }
-        return kwargs
 
     def dispatch(self, request, *args, **kwargs):
         self.customer = get_object_or_404(Customer, user_id=self.kwargs["user_id"])
@@ -219,9 +226,10 @@ class CounterClick(
         return kwargs
 
 
-class RefillingCreateView(FragmentMixin, FormView):
+class RefillingCreateView(FragmentMixin, CreateView):
     """This is a fragment only view which integrates with counter_click.jinja"""
 
+    model = Refilling
     form_class = RefillForm
     template_name = "counter/fragments/create_refill.jinja"
 
@@ -242,23 +250,20 @@ class RefillingCreateView(FragmentMixin, FormView):
         ):
             raise PermissionDenied
 
-        self.operator = get_operator(request, self.counter, self.customer)
-
         return super().dispatch(request, *args, **kwargs)
 
     def render_fragment(self, request, **kwargs) -> SafeString:
         self.customer = kwargs.pop("customer")
         self.counter = kwargs.pop("counter")
+        self.object = None
         return super().render_fragment(request, **kwargs)
 
-    def form_valid(self, form):
-        res = super().form_valid(form)
-        form.clean()
-        form.instance.counter = self.counter
-        form.instance.operator = self.operator
-        form.instance.customer = self.customer
-        form.instance.save()
-        return res
+    def get_form_kwargs(self):
+        return super().get_form_kwargs() | {
+            "counter": self.counter,
+            "operator": get_operator(self.request, self.counter, self.customer),
+            "customer": self.customer,
+        }
 
     def get_context_data(self, **kwargs):
         kwargs = super().get_context_data(**kwargs)
diff --git a/eboutic/static/bundled/eboutic/eboutic-index.ts b/eboutic/static/bundled/eboutic/eboutic-index.ts
index 59a258e3..50a7f715 100644
--- a/eboutic/static/bundled/eboutic/eboutic-index.ts
+++ b/eboutic/static/bundled/eboutic/eboutic-index.ts
@@ -5,10 +5,11 @@ interface BasketItem {
   name: string;
   quantity: number;
   unitPrice: number;
+  isRefill: boolean;
 }
 
 const BASKET_CACHE_KEY = "basket";
-const BASKET_CACHE_VERSION = 1;
+const BASKET_CACHE_VERSION = 2;
 
 document.addEventListener("alpine:init", () => {
   Alpine.data("basket", (validPrices: number[], lastPurchaseTime?: number) => ({
@@ -21,7 +22,7 @@ document.addEventListener("alpine:init", () => {
       });
       document
         .getElementById("id_form-TOTAL_FORMS")
-        .setAttribute(":value", "basket.length");
+        ?.setAttribute(":value", "basket.length");
     },
 
     loadBasket(): BasketItem[] {
@@ -32,8 +33,8 @@ document.addEventListener("alpine:init", () => {
         return [];
       }
       if (
-        lastPurchaseTime !== null &&
-        localStorage.basketTimestamp !== undefined &&
+        lastPurchaseTime &&
+        localStorage.basketTimestamp &&
         new Date(lastPurchaseTime) >=
           new Date(Number.parseInt(localStorage.basketTimestamp, 10))
       ) {
@@ -64,6 +65,19 @@ document.addEventListener("alpine:init", () => {
       );
     },
 
+    /**
+     * Get the total of money that would be added to the AE account on basket purchase.
+     */
+    getTotalAdded() {
+      return this.basket
+        .filter((item) => item.isRefill || item.unitPrice < 0)
+        .reduce(
+          (acc: number, item: BasketItem) =>
+            acc + Math.abs(item.quantity * item.unitPrice),
+          0,
+        );
+    },
+
     /**
      * Add 1 to the quantity of an item in the basket
      * @param {BasketItem} item
@@ -86,7 +100,7 @@ document.addEventListener("alpine:init", () => {
 
       if (this.basket[index].quantity === 0) {
         this.basket = this.basket.filter(
-          (e: BasketItem) => e.priceId !== this.basket[index].id,
+          (e: BasketItem) => e.priceId !== this.basket[index].priceId,
         );
       }
     },
@@ -103,14 +117,16 @@ document.addEventListener("alpine:init", () => {
      * @param id The id of the product to add
      * @param name The name of the product
      * @param price The unit price of the product
+     * @param isRefill true if the product is a refill bond
      * @returns The created item
      */
-    createItem(id: number, name: string, price: number): BasketItem {
+    createItem(id: number, name: string, price: number, isRefill: boolean): BasketItem {
       const newItem = {
         priceId: id,
         name,
         quantity: 0,
         unitPrice: price,
+        isRefill,
       } as BasketItem;
 
       this.basket.push(newItem);
@@ -125,16 +141,17 @@ document.addEventListener("alpine:init", () => {
      * @param id The id of the product to add
      * @param name The name of the product
      * @param price The unit price of the product
+     * @param isRefill true if the product is a refill bond
      */
-    addFromCatalog(id: number, name: string, price: number) {
-      let item = this.basket.find((e: BasketItem) => e.priceId === id);
+    addFromCatalog(id: number, name: string, price: number, isRefill: boolean) {
+      const item = this.basket.find((e: BasketItem) => e.priceId === id);
 
       // if the item is not in the basket, we create it
       // else we add + 1 to it
       if (item) {
         this.add(item);
       } else {
-        item = this.createItem(id, name, price);
+        this.createItem(id, name, price, isRefill);
       }
     },
   }));
diff --git a/eboutic/templates/eboutic/eboutic_main.jinja b/eboutic/templates/eboutic/eboutic_main.jinja
index 4962d5ce..78f5429c 100644
--- a/eboutic/templates/eboutic/eboutic_main.jinja
+++ b/eboutic/templates/eboutic/eboutic_main.jinja
@@ -58,6 +58,17 @@
             </div>
           </div>
         {% endif %}
+        <template x-if="(getTotalAdded() + {{ customer_amount }}) > {{ settings.SITH_ACCOUNT_MAX_MONEY }}">
+          <div class="alert alert-red">
+            <div class="alert-main">
+              {% trans trimmed limit=settings.SITH_ACCOUNT_MAX_MONEY %}
+                You cannot purchase the current basket,
+                because it would put your AE account balance
+                above the {{ limit }}€ limit
+              {% endtrans %}
+            </div>
+          </div>
+        </template>
         <ul class="item-list">
           {# Starting money #}
           <li>
@@ -109,9 +120,12 @@
             <i class="fa fa-trash"></i>
             {% trans %}Clear{% endtrans %}
           </button>
-          <button class="btn btn-blue">
+          <button
+            class="btn btn-blue"
+            :disabled="(getTotalAdded() + {{ customer_amount }}) > {{ settings.SITH_ACCOUNT_MAX_MONEY }}"
+          >
             <i class="fa fa-check"></i>
-            <input type="submit" value="{% trans %}Validate{% endtrans %}"/>
+            {% trans %}Validate{% endtrans %}
           </button>
         </div>
       </form>
@@ -199,7 +213,12 @@
                 id="{{ price.id }}"
                 class="card clickable shadow"
                 :class="{selected: basket.some((i) => i.priceId === {{ price.id }})}"
-                @click='addFromCatalog({{ price.id }}, {{ price.full_label|tojson }}, {{ price.amount }})'
+                @click='addFromCatalog(
+                        {{ price.id }},
+                        {{ price.full_label|tojson }},
+                        {{ price.amount }},
+                        {{ (price.product.product_type_id == settings.SITH_COUNTER_PRODUCTTYPE_REFILLING)|lower }}
+                        )'
                 {% if price.sold_out %}disabled{% endif %}
               >
                 {% if price.product.icon %}
diff --git a/eboutic/tests/test_basket.py b/eboutic/tests/test_basket.py
index 5df6df6d..2dc296d1 100644
--- a/eboutic/tests/test_basket.py
+++ b/eboutic/tests/test_basket.py
@@ -278,6 +278,27 @@ class TestEboutic(TestCase):
         )
         assert Basket.objects.count() == 2
 
+    def test_refill_limit(self):
+        """Test that an eboutic basket cannot refill an account above the limit."""
+        self.client.force_login(self.subscriber)
+        product = product_recipe.make(
+            product_type_id=settings.SITH_COUNTER_PRODUCTTYPE_REFILLING,
+            counters=[self.eboutic],
+        )
+        price = price_recipe.make(
+            product=product,
+            groups=[self.group_cotiz],
+            amount=settings.SITH_ACCOUNT_MAX_MONEY // 10,
+        )
+
+        response = self.submit_basket([BasketItem(price.id, 10)])
+        assert Basket.objects.count() == 1
+        assertRedirects(response, reverse("eboutic:checkout", kwargs={"basket_id": 1}))
+
+        response = self.submit_basket([BasketItem(price.id, 11)])
+        assert Basket.objects.count() == 1
+        assert response.status_code == 200  # no redirect = form validation failed
+
     def test_create_basket(self):
         self.client.force_login(self.new_customer)
         assertRedirects(
diff --git a/eboutic/views.py b/eboutic/views.py
index ed3e1311..218e830d 100644
--- a/eboutic/views.py
+++ b/eboutic/views.py
@@ -66,9 +66,7 @@ if TYPE_CHECKING:
 
 
 class BaseEbouticBasketForm(BaseBasketForm):
-    def _check_enough_money(self, *args, **kwargs):
-        # Disable money check
-        ...
+    min_result_balance = None  # user can pay by card, so no minimum enforced
 
 
 EbouticBasketForm = forms.formset_factory(
@@ -88,15 +86,15 @@ class EbouticMainView(LoginRequiredMixin, FormView):
     form_class = EbouticBasketForm
 
     def get_form_kwargs(self):
-        kwargs = super().get_form_kwargs()
-        kwargs["form_kwargs"] = {
+        return super().get_form_kwargs() | {
             "customer": self.customer,
             "counter": get_eboutic(),
-            "allowed_prices": {
-                price.id: price for price in self.prices if not price.sold_out
+            "form_kwargs": {
+                "allowed_prices": {
+                    price.id: price for price in self.prices if not price.sold_out
+                }
             },
         }
-        return kwargs
 
     def form_valid(self, formset):
         if len(formset) == 0:
diff --git a/locale/fr/LC_MESSAGES/django.po b/locale/fr/LC_MESSAGES/django.po
index 862fbde5..baf33c8c 100644
--- a/locale/fr/LC_MESSAGES/django.po
+++ b/locale/fr/LC_MESSAGES/django.po
@@ -6,7 +6,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2026-06-05 13:39+0200\n"
+"POT-Creation-Date: 2026-06-10 20:18+0200\n"
 "PO-Revision-Date: 2016-07-18\n"
 "Last-Translator: Maréchal <thomas.girod@utbm.fr\n"
 "Language-Team: AE info <ae.info@utbm.fr>\n"
@@ -3306,6 +3306,11 @@ msgstr "Saisie de produit dupliquée"
 msgid "Not enough money"
 msgstr "Solde insuffisant"
 
+#: counter/forms.py counter/models.py
+#, python-format
+msgid "There cannot be more than %(money)d€ on an AE account"
+msgstr "Il ne peut pas y avoir plus de %(money)d€ sur un compte AE"
+
 #: counter/forms.py
 #, python-format
 msgid ""
@@ -4428,6 +4433,15 @@ msgstr "Payer avec un compte AE"
 msgid "The online shop of the association."
 msgstr "La boutique en ligne de l'association."
 
+#: eboutic/templates/eboutic/eboutic_main.jinja
+#, python-format
+msgid ""
+"You cannot purchase the current basket, because it would put your AE account "
+"balance above the %(limit)s€ limit"
+msgstr ""
+"Vous ne pouvez pas finaliser le panier actuel, parce que le solde de votre "
+"compte AE passerait au-dessus de la limite de %(limit)s€."
+
 #: eboutic/templates/eboutic/eboutic_main.jinja
 msgid "Clear"
 msgstr "Vider"
diff --git a/sith/settings.py b/sith/settings.py
index ce872c7d..5866cd73 100644
--- a/sith/settings.py
+++ b/sith/settings.py
@@ -503,6 +503,12 @@ SITH_ACCOUNT_INACTIVITY_DELTA = relativedelta(years=2)
 SITH_ACCOUNT_DUMP_DELTA = timedelta(days=30)
 """timedelta between the warning mail and the actual account dump"""
 
+SITH_ACCOUNT_MAX_MONEY = 250  # €
+"""Maximum amount of money a sith account can hold.
+
+This amount is defined by the AE's Terms and Conditions of Sale.
+"""
+
 # Defines which product type is the refilling type,
 # and thus increases the account amount
 SITH_COUNTER_PRODUCTTYPE_REFILLING = env.int(