When Will I Be Debt Free? How the Date Is Worked Out

This article represents a personal view and is not financial advice. The examples are arithmetic on stated figures; your own lender terms will differ.

Your debt-free date is the month the last balance reaches zero. It is not a guess and it is not the end date on a loan agreement, because most households carry several debts on different rates, and the date depends on every one of them and on what you pay.

How the date is worked out

One step, repeated. Each month the lender adds interest to the balance (the annual rate divided by twelve, times what you owe), and your payment comes off. The new balance is next month's starting point. Stop when it reaches zero and count the months.

Take £5,000 on a card at 20%. Interest is £83.33 in the first month. Pay £150 a month and the balance reaches zero after 50 payments, with £2,359 of interest paid along the way. Pay £200 and it takes 33 payments and £1,522 of interest. Pay £100 and it takes 109 payments, over nine years, and £5,840 of interest. A third more each month (£150 to £200) cuts the date by a third and the interest by a third. Going from £100 to £150 more than halves the date, because every pound paid early stops the interest it would have attracted for every month after.

The payment that never finishes

Pay less than the monthly interest and the balance grows. On the same £5,000 at 20%, £83.33 is the line. At £84 the debt clears after 293 payments, nearly 25 years, and costs £19,578 in interest. At £83 it never clears. A payment barely above the interest feels like progress and moves the date by decades, which is why the first pounds above the interest are the ones that matter.

What moves the date

• A rate change. A 0% card deal that ends turns a falling balance into one that stops falling. A mortgage fix that ends moves the payment, and the date with it, on the day it ends.
• A minimum payment that shrinks. Many cards set the minimum as a percentage of the balance, so the payment falls as the balance does and the tail takes far longer than the first year suggests.
• An overpayment. Recurring or one-off, it comes straight off the balance, so the interest on it stops and the date moves earlier by more than the pounds suggest.
• A debt that clears. Its payment stops, and that cash is spare again. Whether it then goes into the next debt is a choice you make, not something that happens by itself.
• A student loan. It is repaid as a share of earnings above a threshold, not as a fixed payment, and the balance is written off at the end of its term if it has not cleared. A written-off loan is gone from your balance sheet, but you did not pay it off, so it belongs in a different sentence.

Several debts, one date

The household's debt-free date is the latest of the individual dates, so it is set by the debt that lasts longest, which is usually the mortgage. Each debt has its own date as well, and the assistant gives both. The related question, when what you own passes what you owe, is worked through in when do your assets outweigh your debts.

A worked example: the sample household

Sample household, invented figures. The CrestCast demo holds four debts: a mortgage of £182,000, a personal loan, a credit card of £3,200 that is 0% for a few months and then 22.9%, and a balance transfer card. Asked 'When will we be debt free?', the assistant answers from the forecast, not from a template. The wording varies; the dates and balances do not:

• Not every debt is paid off within the ten-year forecast, which ends in September 2036.
• Balance Transfer Card: paid off in Feb 2027.
• Personal Loan: paid off in Apr 2028.
• Credit Card: not paid off by the end of September 2036, with £1,995 still owed.
• Mortgage: not paid off by the end of September 2036, with £103,839 still owed.

Those balances are in today's money. The mortgage costs £76,162 in interest over those ten years, an average of £635 a month, also in today's money; ask "How much of my mortgage payments from October 2026 to September 2036 is interest?" to see it. The surprising line is the card. It is £3,200 on a 22.9% rate with a minimum payment of 2% of the balance, and a 2% payment is close to a month's interest at that rate, so after the 0% deal ends the balance barely falls. The answer to the question is that this household is not debt free inside ten years, and the card is the line that explains why a small debt is still there.

You can ask the same question of the same household, and then change an overpayment or a rate and ask again. Open the sample household and tap Ask, then the "Where is your money heading?" card.

Where the limits are

• The forecast runs ten years. A debt that outlasts that gets a balance at the end of the window, not a date. Say so rather than invent one.
• It runs on the balances, rates and payments you enter. A rate you have not entered cannot move the date.
• Future rates are assumptions. A fixed rate ending in 2028 is a known date; the rate you will pay after it is not.
• It does not read your bank. If a balance changes, you update it.

For one debt in isolation, the debt payoff calculator gives a date from a balance, a rate and a payment.

The split between interest and capital in each payment is in how a loan actually works. Fixed-rate endings, 0% cards, overpayments and student loans across a whole household are covered on the debt payoff planner page.