BOGO 50% Off: What Discount Percent Are You Really Getting

“Buy one, get one 50% off” reads like a big discount, and the framing is doing real work — the headline number is 50%, but that percentage only applies to the second item, not the whole purchase. Once you spread it across both items, the actual discount on the total order is much smaller.

The math on two equal-priced items

Say both items cost $40 each — $80 combined at full price. “BOGO 50% off” means you pay full price for the first ($40) and half price for the second ($20), for a total of $60. The discount:

($80 − $60) / $80 = 25%

A 50%-off headline on a single item works out to a 25% discount on the pair. That’s a real deal, but it’s half the savings the phrase “50% off” might suggest on first read.

What changes with unequal prices

Retailers almost always apply the 50%-off portion to the lower-priced of the two items — check the fine print, since this is standard but not universal. If item A is $60 and item B is $40, the discount applies to B: you pay $60 + $20 = $80 instead of $100, a 20% discount on the pair, slightly less than the equal-price case.

Comparison table

Notice the last two rows: on two equal-priced items, “BOGO 50% off” and a flat “25% off everything” sale land at the identical total. The BOGO framing isn’t a better deal — it’s the same deal with a bigger headline number, which is exactly the kind of framing the FTC’s truth-in-advertising guidance is designed to keep honest.

When BOGO actually wins

The deal is genuinely better than a flat 25% discount only if you were already planning to buy exactly two (or a multiple of two) of the qualifying item. If you only wanted one, there’s no discount at all — you’d have to buy a second item you didn’t need to unlock any savings. For a single straightforward percent-off comparison across different promotions, see our guide on what percent discount is actually good.