How it's calculated
Cashback you're owed = spending × percentage. Cashback you get = the lower of that and the cap. Real savings for the year = cashback × 12 − card cost.
The real cashback rate is what you save divided by everything you spent over the year. If you go over the cap, the real percentage falls: the extra spending earns nothing back.
Watch out for this
- Spending more just to "take advantage" of the cashback means losing money.
- Check whether the cashback applies to all merchants or only to certain categories.
- If you pay your balance late, interest eats any cashback.