diff --git a/CHANGELOG b/CHANGELOG
index 2aacf018ee..c5540c601d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Add customer currency on party
 * Add support for Python 3.10
 * Remove support for Python 3.6
 
diff --git a/__init__.py b/__init__.py
index a924298066..8ee5fd6d28 100644
--- a/__init__.py
+++ b/__init__.py
@@ -18,6 +18,7 @@ def register():
         sale.SaleLineIgnoredMove,
         sale.SaleLineRecreatedMove,
         party.Party,
+        party.PartyCustomerCurrency,
         party.PartySaleMethod,
         product.Configuration,
         product.DefaultLeadTime,
diff --git a/party.py b/party.py
index 5b70da2f6c..284cadad8c 100644
--- a/party.py
+++ b/party.py
@@ -1,7 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 from trytond.i18n import gettext
-from trytond.model import ModelSQL, fields
+from trytond.model import ModelSQL, ValueMixin, fields
 from trytond.modules.company.model import (
     CompanyMultiValueMixin, CompanyValueMixin)
 from trytond.modules.party.exceptions import EraseError
@@ -9,6 +9,10 @@ from trytond.pool import Pool, PoolMeta
 from trytond.pyson import Eval
 from trytond.transaction import Transaction
 
+customer_currency = fields.Many2One(
+    'currency.currency', "Customer Currency",
+    help="Default currency for sales to this party.")
+
 
 def get_sale_methods(field_name):
     @classmethod
@@ -33,6 +37,9 @@ class Party(CompanyMultiValueMixin, metaclass=PoolMeta):
             "Leave empty to use the default value from the configuration."))
     sale_methods = fields.One2Many(
         'party.party.sale_method', 'party', "Sale Methods")
+    customer_currency = fields.MultiValue(customer_currency)
+    customer_currencies = fields.One2Many(
+        'party.party.customer_currency', 'party', "Customer Currencies")
 
     @classmethod
     def multivalue_model(cls, field):
@@ -76,6 +83,14 @@ class PartySaleMethod(ModelSQL, CompanyValueMixin):
     get_sale_shipment_method = get_sale_methods('shipment_method')
 
 
+class PartyCustomerCurrency(ModelSQL, ValueMixin):
+    "Party Customer Currency"
+    __name__ = 'party.party.customer_currency'
+    party = fields.Many2One(
+        'party.party', "Party", ondelete='CASCADE', select=True)
+    customer_currency = customer_currency
+
+
 class Replace(metaclass=PoolMeta):
     __name__ = 'party.replace'
 
diff --git a/party.xml b/party.xml
index 931a8115b7..23475514bd 100644
--- a/party.xml
+++ b/party.xml
@@ -46,5 +46,17 @@ this repository contains the full copyright notices and license terms. -->
             <field name="perm_read" eval="True"/>
             <field name="perm_write" eval="True"/>
         </record>
+
+        <record model="ir.model.field.access" id="access_party_customer_currency">
+            <field name="field" search="[('model.model', '=', 'party.party'), ('name', '=', 'customer_currency')]"/>
+            <field name="perm_read" eval="True"/>
+            <field name="perm_write" eval="False"/>
+        </record>
+        <record model="ir.model.field.access" id="access_party_customer_currency_group_sale">
+            <field name="field" search="[('model.model', '=', 'party.party'), ('name', '=', 'customer_currency')]"/>
+            <field name="group" ref="group_sale"/>
+            <field name="perm_read" eval="True"/>
+            <field name="perm_write" eval="True"/>
+        </record>
     </data>
 </tryton>
diff --git a/sale.py b/sale.py
index 7a50b6adca..4d165632b6 100644
--- a/sale.py
+++ b/sale.py
@@ -380,10 +380,13 @@ class Sale(
     def default_state():
         return 'draft'
 
-    @staticmethod
-    def default_currency():
-        Company = Pool().get('company.company')
-        company = Transaction().context.get('company')
+    @classmethod
+    def default_currency(cls, **pattern):
+        pool = Pool()
+        Company = pool.get('company.company')
+        company = pattern.get('company')
+        if not company:
+            company = cls.default_company()
         if company:
             return Company(company).currency.id
 
@@ -407,13 +410,19 @@ class Sale(
     def default_shipment_state():
         return 'none'
 
-    @fields.depends('party', 'invoice_party', 'shipment_party', 'payment_term')
+    @fields.depends(
+        'company', 'party', 'invoice_party', 'shipment_party', 'payment_term',
+        'lines')
     def on_change_party(self):
         if not self.invoice_party:
             self.invoice_address = None
         if not self.shipment_party:
             self.shipment_address = None
-        self.payment_term = self.default_payment_term()
+        self.payment_term = self.default_payment_term(
+            company=self.company.id if self.company else None)
+        if not self.lines:
+            self.currency = self.default_currency(
+                company=self.company.id if self.company else None)
         if self.party:
             if not self.invoice_party:
                 self.invoice_address = self.party.address_get(type='invoice')
@@ -429,6 +438,9 @@ class Sale(
                 self.invoice_method = self.party.sale_invoice_method
             else:
                 self.invoice_method = self.default_invoice_method()
+            if not self.lines:
+                if self.party.customer_currency:
+                    self.currency = self.party.customer_currency
 
     @fields.depends('party', 'invoice_party')
     def on_change_invoice_party(self):
diff --git a/view/party_form.xml b/view/party_form.xml
index 1d41e7e881..5e477caad0 100644
--- a/view/party_form.xml
+++ b/view/party_form.xml
@@ -11,6 +11,10 @@ this repository contains the full copyright notices and license terms. -->
             <field name="sale_invoice_method"/>
             <label name="sale_shipment_method"/>
             <field name="sale_shipment_method"/>
+
+            <label name="customer_currency"/>
+            <field name="customer_currency"/>
+            <newline/>
         </page>
     </xpath>
 </data>