Calculating 50% off is the simplest discount — just divide the price by two. A $500 item at 50% off costs $250. This is the same as a buy-one-get-one-free deal if you think of it in terms of value per item.

In terms of per-unit cost, yes — both result in paying 50% per item when you buy two. However, with a straight 50% off sale, you can buy a single item at half price, while BOGO requires purchasing two items. The total spending amount differs depending on whether you need one item or two.

Stores commonly offer 50% off during end-of-season clearance, major holidays like Black Friday and Boxing Day, and when discontinuing products. Some retailers also run mid-season half-off promotions to move excess inventory. Signing up for store newsletters often gives you early access to these deep discounts.