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Debt · CalculatorFree · runs in your browser

What does an extra payment really save?

Enter one debt. See when it's gone at your current payment, and what happens if you add a little more each month.

One debt

When money is tight, a debt can feel permanent. In Care.com's 2026 survey, 82% of sandwich-generation caregivers said they felt financially strained. A clear end date doesn't solve that, but it changes how the debt feels: from a fog to a project with a finish line.

Use one debt at a time, such as a credit card or a car loan. The calculator works month by month with your interest rate, so the numbers are close to what a lender's statement would show, though fees and rate changes aren't included.

Not financial advice. No guaranteed returns. This tool gives a rough illustration based only on the numbers you type. It is educational, not financial, investment, tax, legal or insurance advice. Rules and prices differ by country and change over time; check official sources (e.g. IRS, GOV.UK, HMRC) or a qualified, licensed professional before making decisions.

If you have more than one debt

Run each one through the calculator separately. Two common ways to choose which to focus extra money on:

Either way, keep paying at least the minimum on everything else. If you're struggling to make minimum payments, free, independent debt advice is available in both the US and the UK. Look for non-profit services rather than companies that charge fees.

Before the holidays

For many households the next big addition to a credit card is December. If you'd like to plan the season without adding to the balance, the holiday budget and gift cap calculator and the planner below can help.

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The 90-Day Holiday Budget Planner: Gift Caps & Hosting Cost Calculator (PDF + Excel/Google Sheets)

Christmas & Thanksgiving budget, gift caps and hosting cost calculator for women who host. No app needed.

See it on Gumroad → Or take the free 7-question quiz →

Questions people ask

Why does a small extra payment make such a difference?

Every extra amount goes straight to the balance, so next month's interest is charged on a smaller amount. The effect builds over time, especially at high rates.

Does this include fees or promotional rates?

No. If you have a 0% period that ends, run the calculator with the rate that applies afterwards.

Sources

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