[header] How to choose credit cards [title] Check the interest rate. [step] Of all the different things that can impact your credit card decision, the interest rate on the card is probably the most important factor. What makes interest so important? The interest rate your card charges will make a huge difference in the amount of money you end up paying over the long term. 
If you carry a balance from one month to the next, a card with a low, single digit interest rate is best. The impact interest has on what you spend is simple math.