Enter every debt you owe — credit cards, overdrafts, loans, store cards — with its balance, interest rate and minimum payment, then add anything extra you can pay each month. The calculator works out how long your debts will take to clear, the monthly payment you need, and your exact debt-free date. No sign-up, no email — just your numbers.
A debt repayment calculator applies your monthly payments to your debts month by month — charging interest, clearing balances in order, and rolling each cleared payment onto the next debt — to show the date you'll be debt-free and the total interest you'll pay. This tool uses the same amortisation engine as our debt snowball and avalanche calculators, so you can compare repayment orders.
On top of all minimum payments
Your Debts
Creditor
Balance (£)
APR (%)
Min pay (£)
Min pay (%)
Pre-filled with a realistic UK example. The £2,601 credit card balance is the average UK household credit card debt; the overdraft and loan figures are illustrative. Overwrite all of them with your own. Source: ClearScore — average UK household debt, 2025 (correct as of Fri Aug 28 2026 00:00:00 GMT+0000 (Coordinated Universal Time)).
Your entries are saved automatically in this browser only — never sent to a server.
A debt snowflake is a small, irregular one-off payment — a tax rebate, a work bonus, birthday money, or cash from selling something. Drop them in below to see how many months and how much interest they knock off your plan. Got a £500 tax rebate? A single snowflake could shave months off your debt-free date.
Quick add:
Amount (£)
When
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This debt repayment calculator shows how quickly you can clear your debts and become debt-free. Enter your debts and monthly overpayment above, then press Calculate to see your debt-free date, payoff order, and the total interest you save versus paying only the minimums.
List every debt: balance, interest rate and minimum payment. Add credit cards, overdrafts, store cards, catalogue debt and loans — everything you're paying off.
Add any extra you can pay each month on top of the minimums. Even a small overpayment can cut years off your plan.
Read your debt-free date, total interest and month-by-month plan. The calculator shows exactly when each debt clears and what you'll pay along the way.
What the calculator works out for you
Your debt-free date
The calculator runs your balances forward month by month, applying interest and your payments, until every debt reaches zero. The result is a real calendar date — the month you'll make your final payment — so an abstract pile of debt becomes a finish line you can plan around.
The monthly payment you need
It adds up the minimum payment on every debt and your extra overpayment to show the total you'll put toward debt each month. That figure is the commitment your plan depends on, so you can check it against your budget before you start.
Total interest you'll pay
Interest is the price of borrowing, and it's where paying more each month makes the biggest difference. The calculator totals the interest across your whole plan and compares it with paying only the minimums, so you can see how much faster repayment saves you.
Which repayment order should you use?
The order you clear debts in matters far less than how much extra you pay each month — but it still makes a difference. The debt avalanche (highest interest rate first) saves the most interest, while the debt snowball (smallest balance first) gives you quicker, motivating wins that help you stick with the plan. If you're not sure which suits you, compare them side by side to see the exact difference for your debts.
How to pay off debt faster
Overpayments matter most: every pound above the minimum goes straight at your balance instead of the interest, so find and protect as much surplus as you can. If you're paying high interest on a card, a 0% balance transfer can pause interest and let more of each payment clear the balance. And if money is tight, the budget planner can help you free up surplus to put toward your debts each month.
When a repayment calculator isn't the answer
If your minimum payments are already more than you can afford, a calculator isn't the right place to start — free, regulated debt advice is. A debt management plan or another formal option may fit your situation better than an aggressive payoff plan, and advice from StepChange, National Debtline or Citizens Advice costs nothing. In England and Wales, the Breathing Space scheme can freeze most interest and enforcement action for 60 days while you get that advice. There's no shame in asking for help early — it's the step that protects you.
Frequently asked questions
You enter each debt's balance, interest rate and minimum payment, plus any extra you can pay each month. The calculator applies your payments month by month, rolling cleared payments onto the next debt, and shows the date you'll be debt-free, the total interest you'll pay, and a full month-by-month schedule.
Two things decide it: how much extra you pay each month, and the order you clear debts in. Overpayments matter most. For order, the avalanche method (highest interest first) saves the most interest, while the snowball (smallest balance first) gives quicker wins. This calculator lets you compare both.
It depends on your balances, interest rates and how much you pay above the minimums. Paying only minimums can take decades, because most of the payment goes on interest. Adding even £50–£100 a month can cut years off. Enter your figures to see your exact debt-free date.
Yes — it's completely free, runs in your browser, and needs no sign-up or account. Your figures never leave your device. Enter your balances, interest rates and minimum payments to instantly see your debt-free date and month-by-month payoff plan, with no cost and nothing to download.
If your minimum payments already exceed what you can pay, a repayment calculator isn't the right starting point — free regulated debt advice is. Contact StepChange, National Debtline or Citizens Advice at no cost. In England and Wales, the Breathing Space scheme can freeze most interest and enforcement for 60 days while you get advice.
Disclaimer: This calculator is for informational purposes only and does not constitute financial advice. Results are estimates based on the figures you enter and assume fixed interest rates and consistent payments. You remain responsible for meeting every minimum payment. If you are struggling with debt, contact a free UK debt advice service such as StepChange (stepchange.org) or National Debtline. For personal advice, consult an adviser regulated by the Financial Conduct Authority (FCA).
How this calculator works›
The method
This debt repayment calculator uses standard amortisation. Each month it charges interest on every balance (the balance multiplied by the annual rate divided by twelve), applies your minimum payments, then puts any spare payment against one debt at a time. When a debt is cleared its whole payment rolls onto the next — so the amount clearing your debt grows as you go. It repeats month by month until every balance reaches zero, giving your debt-free date, monthly payment and total interest paid. It clears the smallest balance first (the snowball order); to clear the highest interest rate first, use the debt avalanche calculator.
Assumptions & limitations
Interest rates, minimum payments and your extra payment stay the same for the whole plan unless you change the inputs.
Interest is applied monthly on the outstanding balance; it does not model daily interest, annual fees, promotional-rate expiry or missed payments.
It assumes you keep paying at least the minimum on every debt and take on no new borrowing.
Results are estimates to help you plan and compare strategies, not an offer or a statement from your lender.
Data sources
Every calculation runs in your browser on the balances and rates you enter, so the
results reflect your own figures.
The approach follows standard UK personal-finance conventions; for reference figures and guidance we point to MoneyHelper and the Bank of England.
Figures and rules change over time — always check the original source.
Written and reviewed by Peter Barclay,
a UK Chartered Mechanical Engineer — who builds and maintains these tools, pairing
engineering-mathematics training with a focus on the mechanics of debt repayment. The calculators use standard amortization formulas and fixed
repayment orders. Read our methodology
or more about the author.
DebtSnowball is not a financial adviser and is not authorised or regulated by
the FCA (Financial Conduct Authority).
These tools are for education and information only, not financial advice.
If you are struggling with debt, get free, impartial help from
StepChange,
National Debtline
or Citizens Advice.
Last reviewed: August 2026·Spotted an error?
Report it and we will fix it.
Struggling with debt? Get free, impartial advice
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DebtSnowball.co.uk provides free educational information and calculators, not regulated financial advice. Calculator results are estimates for illustrative purposes only, based on the figures you enter, and should not be treated as financial advice. For advice tailored to your situation, speak to a free debt-advice charity above or an adviser regulated by the FCA. This site is supported by advertising; ads do not influence our editorial content.