The best cashback setup for groceries & gas

For most households, groceries and gas are two of the biggest monthly expenses — which makes them the fastest place to grow your cashback. But they're also where the fine print bites hardest. Get the setup right and you can earn several times more on these categories than a flat card pays.

Why these two categories matter so much

A flat 2% card pays 2% on groceries and gas. Category cards can pay 3–6% on groceries and 3–4% on gas. If you spend, say, $600/month on groceries and $150 on gas, moving from 2% to 5–6% on groceries alone can be well over $200 a year in extra cashback — for the same purchases.

The exclusions that trip people up

This is the single most common reason people earn less than they expected. If a big chunk of your food shopping is at Costco or Walmart, the "best" grocery card on paper may not be your best card at all — you may want one that specifically includes warehouse clubs, or the warehouse store's own card.

A setup that usually works

• A grocery-focused card for regular supermarkets (watch the bonus cap and exclusions).
• A gas or broad-category card for fuel — ideally one whose gas bonus isn't limited to a tiny cap.
• A flat-rate catch-all for warehouse clubs, superstores, and everything else the bonuses don't cover.

Then you just use the right card at the right place — supermarket card at the supermarket, gas card at the pump, catch-all at Costco.

CashStack matches the setup to where you actually shop

CashStack asks not just how much you spend on groceries and gas, but how much is at warehouse clubs and superstores — then models each card's real exclusions. The result is a setup tuned to your actual shopping, not a generic "best grocery card" list that falls apart at the warehouse checkout.

Build your groceries & gas setup →