According to VantageScore report on how credit behaviors affect your credit score, those with a low credit score may see a credit score bump of 5 to 10 points every month you use responsible credit behavior such as making on-time payments. And, you may see larger jumps of 35 to 50 points or even more if your score was low because of high credit utilization and you make a large lump sum payment to one of your cards and keep the balance low.
With poor credit, you may not be able to get approved for new credit products like credit cards. Although you may still be able to take out an auto loan or a mortgage, you’ll pay a much higher interest rate because of your low credit score. Compared to a borrower with good credit, someone with poor credit can pay $50,000 more in interest on a mortgage. Over an entire lifetime, you could end up paying over $200,000 more in unnecessary interest just because of bad credit.