diff --git a/l10n_it_asset_management/tests/test_asset_depreciation.py b/l10n_it_asset_management/tests/test_asset_depreciation.py
index b3b355fc95db..c52bc22ae68e 100644
--- a/l10n_it_asset_management/tests/test_asset_depreciation.py
+++ b/l10n_it_asset_management/tests/test_asset_depreciation.py
@@ -205,8 +205,8 @@ def test_depreciate_partial_sale_loss_coefficient(self):
             "partial_dismiss",
             wiz_values={
                 "asset_id": asset,
-                "depreciated_fund_amount": depreciated_fund_amount,
                 "asset_purchase_amount": asset_purchase_amount,
+                "depreciated_fund_amount": depreciated_fund_amount,
             },
         )
 
diff --git a/l10n_it_asset_management/tests/test_assets_management.py b/l10n_it_asset_management/tests/test_assets_management.py
index a13f4c60a59f..1408f2d30759 100644
--- a/l10n_it_asset_management/tests/test_assets_management.py
+++ b/l10n_it_asset_management/tests/test_assets_management.py
@@ -6,7 +6,8 @@
 
 from odoo import fields
 from odoo.exceptions import AccessError, ValidationError
-from odoo.fields import Command
+from odoo.fields import Command, first
+from odoo.tests import Form
 from odoo.tools.date_utils import relativedelta
 
 from .common import Common
@@ -816,3 +817,64 @@ def test_open_manage_asset_wiz(self):
             asset_wiz.with_user(forbidden_user).link_asset()
         asset_wiz.with_user(manager_user).link_asset()
         asset_wiz.with_user(account_user).link_asset()
+
+    def test_wizard_compute_depreciated_fund(self):
+        """
+        When partially dismissing an asset,
+        the fund amount in wizard is computed based on
+        the purchased amount and civil depreciation amounts.
+        """
+        # Arrange
+        civil_depreciation_type = self.env.ref(
+            "l10n_it_asset_management.ad_type_civilistico"
+        )
+        purchase_date = date(2019, 1, 1)
+        depreciation_date = date(2020, 1, 1)
+        civil_depreciable_amount = 1000
+        civil_depreciated_amount = 250
+        purchase_amount = 300
+
+        asset = self._create_asset(purchase_date)
+        civil_depreciation = first(
+            asset.depreciation_ids.filtered(
+                lambda d: d.type_id == civil_depreciation_type
+            )
+        )
+        civil_depreciation.mode_id.line_ids.unlink()
+        civil_depreciation.percentage = 25.0
+        self._depreciate_asset(asset, depreciation_date)
+
+        invoice_form = Form(
+            self.env["account.move"].with_context(default_move_type="out_invoice")
+        )
+        invoice_form.partner_id = self.env.ref("base.partner_demo")
+        with invoice_form.invoice_line_ids.new() as line:
+            line.account_id = asset.category_id.asset_account_id
+            line.price_unit = 100
+        invoice = invoice_form.save()
+        invoice.action_post()
+
+        self.assertEqual(
+            civil_depreciation.amount_depreciable, civil_depreciable_amount
+        )
+        self.assertEqual(
+            civil_depreciation.amount_depreciated, civil_depreciated_amount
+        )
+
+        # Act
+        wizard_action = invoice.open_wizard_manage_asset()
+        wizard_form = Form(
+            self.env[wizard_action["res_model"]].with_context(
+                **wizard_action["context"]
+            )
+        )
+        wizard_form.management_type = "partial_dismiss"
+        wizard_form.asset_id = asset
+        wizard_form.asset_purchase_amount = purchase_amount
+        wizard = wizard_form.save()
+
+        # Assert
+        self.assertEqual(
+            wizard.depreciated_fund_amount,
+            purchase_amount * civil_depreciated_amount / civil_depreciable_amount,
+        )
diff --git a/l10n_it_asset_management/wizard/account_move_manage_asset.py b/l10n_it_asset_management/wizard/account_move_manage_asset.py
index 7f0635015f04..590eba628ef5 100644
--- a/l10n_it_asset_management/wizard/account_move_manage_asset.py
+++ b/l10n_it_asset_management/wizard/account_move_manage_asset.py
@@ -47,7 +47,11 @@ def get_default_move_ids(self):
         string="Currency",
     )
 
-    depreciated_fund_amount = fields.Monetary()
+    depreciated_fund_amount = fields.Monetary(
+        compute="_compute_depreciated_fund_amount",
+        store=True,
+        readonly=False,
+    )
 
     depreciation_type_ids = fields.Many2many(
         "asset.depreciation.type", string="Depreciation Types"
@@ -122,6 +126,35 @@ def get_default_move_ids(self):
         "update": lambda w: w.update_asset(),
     }
 
+    @api.depends(
+        "asset_id",
+        "asset_purchase_amount",
+        "management_type",
+    )
+    def _compute_depreciated_fund_amount(self):
+        civil_depreciation_type = self.env.ref(
+            "l10n_it_asset_management.ad_type_civilistico",
+            raise_if_not_found=False,
+        )
+        for wizard in self:
+            depreciated_fund_amount = 0
+            if civil_depreciation_type and wizard.management_type == "partial_dismiss":
+                asset = wizard.asset_id
+                civil_depreciation = asset.depreciation_ids.filtered(
+                    lambda dep: dep.type_id == civil_depreciation_type
+                )
+                civil_depreciable_amount = civil_depreciation.amount_depreciable
+                if civil_depreciation and civil_depreciable_amount:
+                    # Resolve
+                    # depreciated : depreciable = fund_amount : purchase_amount
+                    # for fund_amount
+                    depreciated_fund_amount = (
+                        wizard.asset_purchase_amount
+                        * civil_depreciation.amount_depreciated
+                        / civil_depreciable_amount
+                    )
+            wizard.depreciated_fund_amount = depreciated_fund_amount
+
     @api.onchange("asset_id", "management_type")
     def onchange_depreciation_type_ids(self):
         if self.management_type == "update":