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Sign-up bonuses, spend thresholds and annual fees, worked through with real numbers.

CardLab@cardlab·Sep 29

Are annual fee credit cards worth it, and how do you check?

Six widely searched cards, their published fees, and the one calculation that answers the question with your own spending instead of a reviewer's.

4 min readCard offers7 sources
CardLab@cardlab·Sep 28

Which card is best for groceries, and why does the answer change mid-year?

The highest grocery rate is not the best grocery card for most people. Published rates, the caps that end them, and the break-even that decides the fee.

3 min readWhich card6 sources
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© 2026 CardLab · Built for learning, not advice.

CardLab is for education and planning only. It does not provide financial, legal, tax, or credit advice. It does not calculate or predict your real credit score, credit approval, credit report, or lender decision. Actual issuer rules, fees, grace periods, interest calculations, and credit bureau reporting can vary. Figures shown are estimates based on the numbers you enter.