diff --git a/addons/l10n_in/models/account_invoice.py b/addons/l10n_in/models/account_invoice.py
index d0fc2c60bce..fbd3ca1203f 100644
--- a/addons/l10n_in/models/account_invoice.py
+++ b/addons/l10n_in/models/account_invoice.py
@@ -35,7 +35,14 @@ class AccountMove(models.Model):
     @api.depends('partner_id')
     def _compute_l10n_in_gst_treatment(self):
         for record in self:
-            record.l10n_in_gst_treatment = record.partner_id.l10n_in_gst_treatment
+            gst_treatment = record.partner_id.l10n_in_gst_treatment
+            if not gst_treatment:
+                gst_treatment = 'unregistered'
+                if record.partner_id.country_id.code == 'IN' and record.partner_id.vat:
+                    gst_treatment = 'regular'
+                elif record.partner_id.country_id and record.partner_id.country_id.code != 'IN':
+                    gst_treatment = 'overseas'
+            record.l10n_in_gst_treatment = gst_treatment
 
     @api.depends('partner_id', 'company_id')
     def _compute_l10n_in_state_id(self):