BOGO vs. Percent Off
"Buy One Get One Free" and "50% off" sound interchangeable. They are not — because they change basket size and units delivered differently.
The comparison, using the site's standard example ($30 price / $8 cost)
- 50% off one unit: pays $15, 1 unit delivered, cost $8, profit $7 (margin 46.7%)
- BOGO (buy 1 get 1 free): pays $30, 2 units delivered, cost $16, profit $14 (margin 46.7%)
Both hit the same 46.7% margin, but BOGO earns exactly double the profit per order — because it requires a 2-unit basket rather than discounting a single unit. The trade-off: BOGO gives away twice as much inventory per redemption.
When each tends to work better
Percent-off discounts are simpler to reason about and don't require inventory of a second unit. BOGO can be more effective at moving excess inventory or increasing basket size, but commits more units per transaction and can train customers to wait for the next BOGO event.
Related tools
Choose the offer that matches customer behavior
BOGO and percent-off promotions can produce similar effective discounts but very different basket sizes, inventory use and customer perception. Compare both economics and the behavior each mechanic asks of the shopper.
Decision questions
- Does the customer naturally need a second unit now, later or as a gift?
- Can inventory support the free-unit demand without stockouts elsewhere?
- Would a smaller discount convert customers who only want one unit?
Measure after launch
- Track units per order, contribution per order and incremental customers separately.
- Watch for longer repurchase cycles after customers stock up.
- Compare results with a true holdout or recent non-promotional period where possible.