diff --git a/openupgrade_scripts/scripts/purchase/18.0.1.2/post-migration.py b/openupgrade_scripts/scripts/purchase/18.0.1.2/post-migration.py
new file mode 100644
index 000000000000..cf2195078a86
--- /dev/null
+++ b/openupgrade_scripts/scripts/purchase/18.0.1.2/post-migration.py
@@ -0,0 +1,28 @@
+# Copyright 2025 ForgeFlow S.L. (https://www.forgeflow.com)
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from openupgradelib import openupgrade, openupgrade_180
+
+
+def convert_company_dependent(env):
+    openupgrade_180.convert_company_dependent(
+        env, "res.partner", "property_purchase_currency_id"
+    )
+    openupgrade_180.convert_company_dependent(
+        env, "res.partner", "receipt_reminder_email"
+    )
+    openupgrade_180.convert_company_dependent(
+        env, "res.partner", "reminder_date_before_receipt"
+    )
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    convert_company_dependent(env)
+    openupgrade.load_data(env, "purchase", "18.0.1.2/noupdate_changes.xml")
+    openupgrade.delete_record_translations(
+        env.cr, "purchase", ["email_template_edi_purchase", "track_po_line_template"]
+    )
+    openupgrade.delete_records_safely_by_xml_id(
+        env,
+        ["purchase.receipt_reminder_email", "purchase.reminder_date_before_receipt"],
+    )
diff --git a/openupgrade_scripts/scripts/purchase/18.0.1.2/pre-migration.py b/openupgrade_scripts/scripts/purchase/18.0.1.2/pre-migration.py
new file mode 100644
index 000000000000..08c68207e23e
--- /dev/null
+++ b/openupgrade_scripts/scripts/purchase/18.0.1.2/pre-migration.py
@@ -0,0 +1,24 @@
+# Copyright 2025 ForgeFlow S.L. (https://www.forgeflow.com)
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from openupgradelib import openupgrade
+
+
+def fill_purchase_order_amount_total_cc(env):
+    openupgrade.logged_query(
+        env.cr,
+        """
+        UPDATE purchase_order
+        SET amount_total_cc = amount_total / currency_rate
+        WHERE COALESCE(currency_rate, 0) != 0""",
+    )
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    openupgrade.delete_sql_constraint_safely(
+        env, "purchase", "purchase_order_line", "accountable_required_fields"
+    )
+    openupgrade.add_columns(
+        env, [("purchase.order", "amount_total_cc", "float", None, "purchase_order")]
+    )
+    fill_purchase_order_amount_total_cc(env)
diff --git a/openupgrade_scripts/scripts/purchase/18.0.1.2/upgrade_analysis_work.txt b/openupgrade_scripts/scripts/purchase/18.0.1.2/upgrade_analysis_work.txt
new file mode 100644
index 000000000000..a188bd739f88
--- /dev/null
+++ b/openupgrade_scripts/scripts/purchase/18.0.1.2/upgrade_analysis_work.txt
@@ -0,0 +1,51 @@
+---Models in module 'purchase'---
+new model bill.to.po.wizard [transient]
+new model purchase.bill.line.match [sql_view]
+# NOTHING TO DO
+
+---Fields in module 'purchase'---
+purchase     / account.move.line        / is_downpayment (boolean)      : previously in module sale
+# NOTHING TO DO
+
+purchase     / purchase.order           / amount_total_cc (float)       : NEW isfunction: function, stored
+# DONE: pre-migration: pre-create column and fill it (amount_total_cc = amount_total / currency_rate)
+
+purchase     / purchase.order           / mail_reception_declined (boolean): NEW
+# NOTHING TO DO: new feature
+
+purchase     / purchase.order.line      / analytic_distribution_search (json): DEL stored: False
+# NOTHING TO DO
+
+purchase     / purchase.order.line      / is_downpayment (boolean)      : NEW
+purchase     / purchase.order.line      / product_no_variant_attribute_value_ids (many2many): previously in module purchase_product_matrix
+purchase     / purchase.order.line      / product_template_attribute_value_ids (many2many): previously in module purchase_product_matrix
+# NOTHING TO DO
+
+purchase     / res.partner              / property_purchase_currency_id (many2one): needs conversion to v18-style company dependent
+purchase     / res.partner              / receipt_reminder_email (boolean): needs conversion to v18-style company dependent
+purchase     / res.partner              / reminder_date_before_receipt (integer): needs conversion to v18-style company dependent
+# DONE: post-migration: used openupgrade_180.convert_company_dependent
+
+---XML records in module 'purchase'---
+NEW ir.actions.server: purchase.action_confirm_rfqs
+NEW ir.actions.server: purchase.action_merger
+NEW ir.model.access: purchase.access_bill_to_po_wizard
+NEW ir.model.access: purchase.access_purchase_bill_line_match
+NEW ir.model.access: purchase.access_purchase_bill_line_match_invoicing_payments
+NEW ir.model.access: purchase.access_purchase_bill_line_match_readonly
+# NOTHING TO DO
+
+ir.model.constraint: purchase.constraint_purchase_order_line_accountable_required_fields (changed definition: is now 'check(display_type is not null or is_downpayment or(product_id is not null and product_uom is not null and date_planned is not null))' ('check(display_type is not null or(product_id is not null and product_uom is not null and date_planned is not null))'))
+# DONE: pre-migration: delete it (to safely force the change)
+
+DEL ir.property: purchase.receipt_reminder_email (noupdate)
+DEL ir.property: purchase.reminder_date_before_receipt (noupdate)
+# DONE: post-migration: delete old property safely (now it's an ir.default record created by ORM)
+
+NEW ir.ui.view: purchase.bill_to_po_wizard_form
+NEW ir.ui.view: purchase.product_product_supplierinfo_tree_view2
+NEW ir.ui.view: purchase.purchase_bill_line_match_tree
+NEW ir.ui.view: purchase.purchase_history_graph
+NEW ir.ui.view: purchase.purchase_history_pivot
+DEL ir.ui.view: purchase.view_product_account_purchase_ok_form
+NEW web_tour.tour: purchase.purchase_tour