Bonus category spending caps: the 5% that stops at $500
The headline rate on a rewards card is never the whole story. Most cards pay their best rates only up to a spending cap — after that, the rate collapses to 1%. "5% back on groceries" can really mean "5% on the first $500, then 1% on everything after." If you don't know your caps, you don't know your rewards.
How caps work: the $25-max reality of "5% back"
| Card | Bonus rate | Cap | Max bonus per period* |
|---|---|---|---|
| Citi Custom Cash | 5% on top category | $500 per billing cycle | $25/month ($20 extra vs 1%) |
| Amex Blue Cash Preferred | 6% at US supermarkets | $6,000/year | $360/year ($300 extra vs 1%) |
| Bank of America Customized Cash | 3%/2% | $2,500/quarter combined | $75/quarter ($50 extra vs 1%) |
| Chase Freedom Flex (Q4 2026 categories) | 5% groceries/dining | $1,500/quarter combined | $75/quarter ($60 extra vs 1%) |
| Capital One Savor | 3% at grocery stores | No cap (excl. superstores) | Uncapped |
* "Extra" = the bonus over a 1% baseline, which is what the cap is really worth. Card terms change; verify current terms with the issuer.
The arithmetic is the point: 5% of $500 is $25 a month, and once you cross the line you earn 1% — the same rate a no-fee flat card would pay. The cap, not the headline rate, decides how much of your spending actually earns the bonus.
The grocery problem: family budgets hit caps fastest
Groceries are the category most likely to blow through a cap, because grocery prices have climbed while caps haven't. Americans spent an average of $6,053 on food at home in 2023, and grocery prices rose 25% from 2019 to 2023. The USDA's thrifty food plan for a family of four runs $983.80 a month. At that pace, a household hits the Citi Custom Cash's $500 monthly cap in about three weeks, the Amex cards' $6,000 annual cap in about six months — and every dollar after that earns the 1% fallback. One in-house analysis put it bluntly: as spending caps stay frozen and grocery costs rise, bonus cards quietly deliver less every year.
The decision rule: your cap queue
- Know your cap. Open your card's rewards terms — it's one line, usually "5% on up to $X per quarter/billing cycle." Write it down; this is the number that matters.
- Watch the meter. Check your bonus-category spending monthly. The moment you cross the cap, that card becomes a 1% card for the rest of the period.
- Queue your next card. Route overflow spending to a backup: a card with no grocery cap (like the Savor), another capped card whose meter hasn't started, or — simplest — a flat-rate ~2% card as the default for everything past the cap.
- Pay in full, always. At ~20% interest, carrying a balance wipes out any rewards. A 6% grocery bonus against 20% interest is a losing trade every time.
What success looks like: every dollar of your grocery spend earns at least your flat-rate backup, and no spending quietly drops to 1% for months unnoticed.
Not financial advice: this is general educational information about how rewards programs work. Card offers, rates, and caps change; always check the issuer's current terms before applying or changing how you use a card.
FAQ
Should I activate rotating quarterly categories? Yes — and note the deadline. Chase's Q4 2026 grocery/dining categories, for example, require activation by December 14 to earn the bonus at all.
Are uncapped cards better? Not automatically — compare the total: a capped 6% card can still beat an uncapped 3% card on moderate spending. The cap queue decides; the headline doesn't.