credit
Cards, scores, debt. The math the bureaus use and the levers that actually move the needle.
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interchange on every swipe
Why 0% APR credit cards still make money for banks
Banks earn revenue through interchange fees and balance-transfer charges, even when the annual percentage rate is zero for the consumer.
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for checking your own score
Why checking your own credit score does not lower it
Checking your own credit score is a soft inquiry and does not affect your rating. Drops usually come from hard inquiries or utilization changes.
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your card APR vs ~5% savings
Should I pay off my credit card first or save for emergencies?
The honest answer depends on three numbers: your card's APR, the size of the safety net you need, and how likely you are to actually use the card again if you pay it off.