Cash Back Calculator Formula & How It Works
- Flat-rate: same % on all purchases (e.g. 1.5% everything)
- Tiered/rotating: different % by category (e.g. 5% groceries, 1% all else)
- Annual fee: subtract from total rewards for net benefit
- Spending threshold: some cards require minimum spend for bonus
Cash back cards return a percentage of your spending as cash. Calculate total cash back by multiplying each category's spending by that category's rate. Subtract the annual fee to get net benefit. Compare net cash back to determine if upgrading to a premium rewards card is worth the annual fee.