How do I use a credit card to maximize rewards without going into debt?

Question

ClearValue Editorial Team · Accepted Answer

Treat the card exactly like a debit card — only charge what's already in your bank account, set autopay to the full statement balance, and never carry a balance from one month to the next, so interest never offsets your rewards. The math is unforgiving: a 2% cash back card charging 20%+ APR gives back $20 on a $1,000 balance while costing $17+ in interest for a single month — a near-zero net, and deeply negative if you carry it longer. Rewards only work as free money when you pay zero interest. Set autopay to the full statement balance (not the minimum, not a fixed amount), only put charges on the card that are already covered in checking, and check your balance weekly to catch fraud early. For earning, keep it simple: a flat 1.5-2% everyday card, plus a category card for your one or two heaviest spend areas (groceries, gas, or dining at 3-5%), beats trying to micro-optimize everything. One or two intentional categories captures most of the available value.