Pay Off Debt or Invest?

Every debt payment is an investment with a guaranteed return equal to its rate. Enter yours and see which door the money should go through.

Credit cards
22.15%
Used-car loans
11.43%
30-year mortgage
6.71%
New-car loans
6.39%

US averages, September 2026. Stocks since 1926: 10.47% before inflation, 7.29% after

$
Do you have one month of expenses saved?
Is there an employer match you're not fully claiming?

Your plan

Put the $750 on Credit card first. It pays 22.15% guaranteed; the market's 8% is a hope.

  1. Send $750 a month to Credit card (22.15%). Gone in month 9.
  2. Invest $935 a month at the 8% you expect.

Net worth over 10 years

Pay debt firstRecommendedInvest, pay minimumsSplit 50/50
Net worth at the end$151,973$133,147$150,196
Interest paid$551$8,406$989
Debt-freeMonth 9Not within horizonMonth 16

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The verdict, the steps, and a link that reopens these exact numbers.

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How it decides

Paying a debt is a guaranteed return equal to its rate. Investing is an expected return that some years is negative. So a debt at or above the return you expect gets paid first, no contest.

A debt within three points below your expected return is a toss-up. The market's average edge is small, and it is not guaranteed. Splitting the money is a fine answer; paying the debt is fine too if the guaranteed return lets you sleep.

Two things come before either: one month of expenses in cash, so a surprise doesn't go back on the card, and any employer match you are leaving on the table, which is an instant 50% to 100% return.

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