Which credit card should I use for groceries?
Use the card with the highest rate for the grocery category at a store that actually codes as a supermarket, and switch to your flat-rate card once that card's grocery cap is used up. Warehouse clubs, superstores and most delivery apps do not count as groceries.
Most people answer this question once, pick a card, and never think about it again. That is how the grocery bonus quietly stops working: the store did not code the way you assumed, or you blew through the cap in March and earned the base rate for the rest of the year.
It depends on how the store codes, not what you bought
Card networks assign every merchant a category code. The grocery bonus on your card applies to the supermarket code and nothing else. A store that sells groceries but carries a different code earns the base rate, no matter how full of food your cart is.
The usual traps:
| Store type | Typical code | Grocery bonus? |
|---|---|---|
| Supermarket chains (Kroger, Safeway, Publix, H-E-B, Trader Joe’s, Whole Foods) | Grocery store | Yes |
| Warehouse clubs (Costco, Sam’s Club, BJ’s) | Wholesale club | Almost never |
| Superstores (Target, Walmart) | Discount store | Almost never |
| Delivery and pickup apps (Instacart, DoorDash grocery) | Varies, often “online services” | Sometimes, check terms |
| Specialty stores (bakery, butcher, farmers market) | Miscellaneous food store | Sometimes |
| Drugstores with a grocery aisle | Drug store | No |
Issuers publish their own exclusion lists. The pattern is consistent enough that you can assume warehouse clubs and superstores are out unless your card’s terms say otherwise.
Caps change the answer mid-year
Many of the best grocery rates come with a spending cap, commonly a dollar amount per calendar year. Up to the cap you earn the headline rate; past it, you earn the base rate.
A household that spends $800 a month on groceries clears a $6,000 cap in August. For the rest of the year, a card paying 6 percent on groceries is really paying 1 percent, and a plain 2 percent flat-rate card wins.
The fix is simple but needs tracking: know your cap, know how much of it you have used, and switch cards when you cross it. splurn counts caps for you and moves the ranking the day you cross one.
A decision in three steps
- Confirm the store codes as a supermarket. If it is a warehouse club or superstore, skip to your best flat-rate or warehouse-friendly card.
- Check whether you are under the cap. Under it, use the grocery card. Over it, use the flat-rate card.
- Count any credit the purchase would use. Some cards carry monthly grocery or delivery credits. A $10 credit on a $40 order is worth more than any rate difference.
What about points versus cash back?
A 4x points rate is only better than 3 percent cash back if your points are worth more than 0.75 cents each. If you redeem for cash, value them at one cent. If you transfer to airline partners and book premium cabins, you may reasonably use 1.5 cents or more. Pick a number you believe, apply it to every card, and the comparison becomes a single column.
splurn uses one cent a point by default and lets you change it. The ranking updates instantly, so you can see when the choice flips.
The short version
- Supermarkets earn the grocery bonus. Costco, Target and Walmart do not.
- Caps turn a 6 percent card into a 1 percent card. Switch when you cross one.
- Use your own cents-per-point number to compare points cards to cash back cards.
Quick answers
Does Costco count as groceries on a credit card?
Usually not. Costco and other warehouse clubs carry a wholesale club merchant code, which most issuers exclude from the grocery bonus. US Costco warehouses also take Visa only at the register.
Does Target or Walmart count as a grocery store?
Generally no. They code as discount or department stores, so the grocery bonus does not apply even if you bought only food. Check your card's terms for the exact exclusions.
What happens when I hit my grocery cap?
The rate drops to the card's base rate, often 1 percent or 1 point. Past the cap, a flat-rate card earning 2 percent is usually the better choice until the cap resets.
splurn is not a bank, issuer or lender, and is not affiliated with any issuer. Card terms change; confirm rates, credits and fees in your card's current terms before relying on them.