diff --git a/l10n_be_cooperator/models/tax_shelter_declaration.py b/l10n_be_cooperator/models/tax_shelter_declaration.py
index c3ca93bc0..6523c96d1 100644
--- a/l10n_be_cooperator/models/tax_shelter_declaration.py
+++ b/l10n_be_cooperator/models/tax_shelter_declaration.py
@@ -56,7 +56,13 @@ class TaxShelterDeclaration(models.Model):
         readonly=True,
         default=lambda self: self.env.company,
     )
-    tax_shelter_capital_limit = fields.Float(required=True)
+    tax_shelter_capital_limit = fields.Float(
+        string="Tax shelter capital limit",
+        required=True,
+        compute="_compute_tax_shelter_capital_limit",
+        default=500000,
+        readonly=False,
+    )
     previously_subscribed_capital = fields.Float(
         string="Capital previously subscribed", readonly=True
     )
@@ -140,6 +146,16 @@ def _compute_certificates(self, entries, partner_certificate):
 
         return partner_certificate
 
+    @api.depends("tax_shelter_type")
+    def _compute_tax_shelter_capital_limit(self):
+        if (
+            self.tax_shelter_type == "start_up_small"
+            or self.tax_shelter_type == "start_up_micro"
+        ):
+            self.tax_shelter_capital_limit = 500000
+        elif self.tax_shelter_type == "scale_up":
+            self.tax_shelter_capital_limit = 1000000
+
     def compute_declaration(self):
         self.ensure_one()
         entries = self.env["subscription.register"].search(