Answer:
Interest Rates
The first factor is the most obvious: the interest rate. Naturally, a low rate will cost you less—our numbers indicate a $10,000 balance with a 5.9% interest rate will cost $10,637 in total if paid off in 2 years.
That may not sound too bad, but bear in mind that 5.9% interest is extraordinarily difficult to get these days. Even people with excellent credit scores will likely pay “double digit” interest rates of over 10%. And if you’re paying a more typical 12.9% in interest on that same $10,000, you’ll pay a total of $12,797 over the same 2 years.
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From Google