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Cost of Bad Credit Calculator

Bad credit costs you thousands in higher interest rates. Calculate exactly how much you're overpaying on loans, insurance, and more.

Alexander Katsman

4 min read

The price of a low score, in four numbers

What a weak credit profile actually costs, pulled from FICO and Experian.

Average US FICO score

714

Down 2 points in a year, and 4 off the 2023 peak.

FICO Spring 2026 Credit Insights report, July 16, 2026

Used car APR at a 300 to 500 score

21.77%

Bottom-tier pricing on the same car everyone else is buying.

Experian, State of the Automotive Finance Market, Q1 2026 (VantageScore 4.0 tiers), July 16, 2026

Used car APR at a 781 to 850 score

6.30%

Top-tier pricing. Same car, same loan, different number.

Experian, State of the Automotive Finance Market, Q1 2026 (VantageScore 4.0 tiers), July 16, 2026

The spread your score is worth

15.47 pts

The APR gap between the bottom tier and the top, in points.

Experian Q1 2026, 21.77% minus 6.30%, July 16, 2026

What a low score costs you on a car loan

Average used-car APR by credit tier, same car, same loan.

0%5%10%15%20%25%21.77%19.42%14.03%8.77%6.3%300 to 500501 to 600601 to 660661 to 780781 to 850

Source: Experian, State of the Automotive Finance Market, Q1 2026. Pulled July 19, 2026.

Table view
ItemAverage used car APR
300 to 50021.77%
501 to 60019.42%
601 to 66014.03%
661 to 7808.77%
781 to 8506.3%

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Frequently Asked Questions

How much does bad credit cost on a car loan?

For a $20K 36-month loan, low credit (500-589) costs $5,668 interest at 16.969% APR versus $1,060 at 3.433% for excellent scores, a 435% jump. Use our calculator for your numbers.

What's the interest rate for bad credit mortgages?

Poor credit scores fetch about 6.25% on a 30-year mortgage, versus 3.75% for 740+,adding $147K interest on $300K. Rates vary; check current with the app tool.

Can the bad credit cost calculator predict lifetime expenses?

Yes, it models lifetime borrowing like 18 cars, cards, and a mortgage, showing $250K extra for poor credit versus excellent. Input your details for precision.

Does good credit still cost more than excellent?

Absolutely, good but not excellent credit adds $30K lifetime interest over pristine scores (740+). Slide scores in Credit Booster AI to compare.

How accurate is the cost of bad credit calculator?

It uses Experian tiers and FICO data, updated for rate trends. Results are estimates; actual rates depend on lenders and your full profile.

Can I use the bad credit cost calculator without improving my score?

Sure, to see the hit. But pair it with Credit Booster AI's dispute tools to boost your score and slash those interest rate credit score gaps fast.

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