What is the “previous price” rule in discount campaigns?

In any announcement of a discounted sale the reference price must be the lowest price applied in the 30 days before the discount, and the percentage has to be calculated from that figure. In Türkiye the rule comes from the Law on Consumer Protection (No. 6502) and the Regulation on Discounted Sales; the EU applies a comparable “lowest price in 30 days” rule introduced by the Omnibus Directive.

The point of it is to stop the familiar manoeuvre of lifting a price shortly before a campaign and then presenting it as reduced. Because labels and price history can be checked from outside the business, a breach is straightforward to establish and can draw an administrative sanction from the Advertising Board. We screen your campaign design and your price-history records against the rule, and where it comes to it we run the defence before the Advertising Board.