diff --git a/htdocs/install/mysql/migration/21.0.0-22.0.0.sql b/htdocs/install/mysql/migration/21.0.0-22.0.0.sql
index f4a8631477166..60142101c29e1 100644
--- a/htdocs/install/mysql/migration/21.0.0-22.0.0.sql
+++ b/htdocs/install/mysql/migration/21.0.0-22.0.0.sql
@@ -179,3 +179,17 @@ ALTER TABLE llx_supplier_proposaldet ADD COLUMN extraparams varchar(255);
 
 ALTER TABLE llx_facture_rec ADD COLUMN rule_for_lines_dates varchar(255) DEFAULT 'prepaid';
 
+ALTER TABLE llx_product_customer_price ADD COLUMN date_begin date AFTER ref_customer;
+ALTER TABLE llx_product_customer_price ADD COLUMN date_end date AFTER date_begin;
+ALTER TABLE llx_product_customer_price ADD COLUMN discount_percent real DEFAULT 0 AFTER localtax2_type;
+ALTER TABLE llx_product_customer_price_log ADD COLUMN date_begin date AFTER ref_customer;
+ALTER TABLE llx_product_customer_price_log ADD COLUMN date_end date AFTER date_begin;
+ALTER TABLE llx_product_customer_price_log ADD COLUMN discount_percent real DEFAULT 0 AFTER localtax2_type;
+ALTER TABLE llx_product_customer_price DROP CONSTRAINT fk_product_customer_price_fk_product;
+ALTER TABLE llx_product_customer_price DROP CONSTRAINT fk_product_customer_price_fk_soc;
+ALTER TABLE llx_product_customer_price DROP INDEX uk_customer_price_fk_product_fk_soc;
+ALTER TABLE llx_product_customer_price ADD UNIQUE INDEX uk_customer_price_fk_product_fk_soc (fk_product, fk_soc, date_begin);
+ALTER TABLE llx_product_customer_price ADD CONSTRAINT fk_product_customer_price_fk_product FOREIGN KEY (fk_product) REFERENCES llx_product(rowid);
+ALTER TABLE llx_product_customer_price ADD CONSTRAINT fk_product_customer_price_fk_soc FOREIGN KEY (fk_soc) REFERENCES llx_societe(rowid);
+UPDATE llx_product_customer_price SET date_begin = datec WHERE date_begin IS NULL;
+UPDATE llx_product_customer_price_log SET date_begin = datec WHERE date_begin IS NULL;
diff --git a/htdocs/install/mysql/tables/llx_product_customer_price.key.sql b/htdocs/install/mysql/tables/llx_product_customer_price.key.sql
index 2b827740b6051..afb4300856930 100644
--- a/htdocs/install/mysql/tables/llx_product_customer_price.key.sql
+++ b/htdocs/install/mysql/tables/llx_product_customer_price.key.sql
@@ -20,7 +20,7 @@
 
 ALTER TABLE llx_product_customer_price ADD INDEX idx_product_customer_price_fk_user (fk_user);
 ALTER TABLE llx_product_customer_price ADD INDEX idx_product_customer_price_fk_soc (fk_soc);
-ALTER TABLE llx_product_customer_price ADD UNIQUE INDEX uk_customer_price_fk_product_fk_soc (fk_product, fk_soc);
+ALTER TABLE llx_product_customer_price ADD UNIQUE INDEX uk_customer_price_fk_product_fk_soc (fk_product, fk_soc, date_begin);
 
 ALTER TABLE llx_product_customer_price ADD CONSTRAINT fk_product_customer_price_fk_user FOREIGN KEY (fk_user) REFERENCES llx_user (rowid);
 ALTER TABLE llx_product_customer_price ADD CONSTRAINT fk_product_customer_price_fk_product FOREIGN KEY (fk_product) REFERENCES llx_product(rowid);
diff --git a/htdocs/install/mysql/tables/llx_product_customer_price.sql b/htdocs/install/mysql/tables/llx_product_customer_price.sql
index bc25a0f0b2de8..04757667cad18 100644
--- a/htdocs/install/mysql/tables/llx_product_customer_price.sql
+++ b/htdocs/install/mysql/tables/llx_product_customer_price.sql
@@ -29,6 +29,8 @@ create table llx_product_customer_price
   fk_product			integer NOT NULL,
   fk_soc				integer NOT NULL,
   ref_customer			varchar(128),
+  date_begin			date,
+  date_end				date,
   price					double(24,8) DEFAULT 0,
   price_ttc				double(24,8) DEFAULT 0,
   price_min				double(24,8) DEFAULT 0,
@@ -41,6 +43,7 @@ create table llx_product_customer_price
   localtax1_type        varchar(10)  NOT NULL DEFAULT '0',
   localtax2_tx			double(7,4)  DEFAULT 0,         -- Other local VAT 2
   localtax2_type        varchar(10)  NOT NULL DEFAULT '0',
+  discount_percent		real DEFAULT 0,
   fk_user				integer,
   price_label           varchar(255),
   import_key			varchar(14)                  -- Import key
diff --git a/htdocs/install/mysql/tables/llx_product_customer_price_log.sql b/htdocs/install/mysql/tables/llx_product_customer_price_log.sql
index 43f70f4f984ac..e7761bc022ed6 100644
--- a/htdocs/install/mysql/tables/llx_product_customer_price_log.sql
+++ b/htdocs/install/mysql/tables/llx_product_customer_price_log.sql
@@ -28,6 +28,8 @@ create table llx_product_customer_price_log
   fk_product			integer NOT NULL,
   fk_soc				integer DEFAULT 0 NOT NULL,
   ref_customer			varchar(30),
+  date_begin			date,
+  date_end				date,
   price					double(24,8) DEFAULT 0,
   price_ttc				double(24,8) DEFAULT 0,
   price_min				double(24,8) DEFAULT 0,
@@ -40,6 +42,7 @@ create table llx_product_customer_price_log
   localtax1_type        varchar(10)  NOT NULL DEFAULT '0',
   localtax2_tx			double(7,4)  DEFAULT 0,         -- Other local VAT 2
   localtax2_type        varchar(10)  NOT NULL DEFAULT '0',
+  discount_percent		real DEFAULT 0,
   fk_user				integer,
   price_label           varchar(255),
   import_key 			varchar(14)                  -- Import key