Balance transfers: moving debt without shrinking it
Here is a strange offer. A bank you have never used says: bring us the debt you owe someone else, and we will charge you no interest on it for three years. Banks do not do favours. So the first question on this page is the one that unlocks everything: why would a bank pay to take over your debt?
A balance transfer moves credit card debt to a new card charging 0% interest for a fixed window, currently up to 38 months, for a one-off fee of roughly 2% to 4%. The debt does not shrink. Only the interest stops. Used with a plan, it is the best legal trick in consumer debt. Used without one, it is a longer treadmill.
Why a bank wants your debt
The maths of the offer only makes sense when you see what the bank is buying. It is not buying your debt. It is buying you: a person who already carries a card balance, which makes you the most profitable kind of customer in banking.
The bank's bet is simple, and it is backed by decades of data: most people who transfer a balance do not clear it inside the free window. When the window shuts, the rate on that card jumps to its full APR, often around 30.9%, and the bank that gave three years of free interest starts collecting for many more. The 0% window is the bait money. Your habits are the catch.
None of that makes the offer bad. It makes it exactly like the store card at the till: a real discount, priced on the percentage of people who will not escape cleanly. Your whole job is to be in the escaping group. On this page, that job has a number on it.
The number that decides everything: your monthly escape payment
Say you owe £2,000 on a card at 34.9%, the expensive end of normal. That balance is costing you about £50 a month in interest alone. You transfer it to a 38 month 0% deal with a 3.49% fee.
Read the left box again. At 34.9%, the first £50 of every month's payment is eaten by interest before it touches the debt. On the 0% card, the same £50 is all bullet. That is the whole case for transferring, and it is a strong one.
The escape payment rule is one line: debt divided by months in the window, set up as a standing order on day one. £2,000 over 38 months is £53. If you cannot manage the escape payment, transfer anyway for the breathing room, but know you will need a plan for the cliff at the end.
The treadmill version
Now the version the bank is betting on. Same transfer, but you pay £25 a month, the sort of minimum that feels fine. After 38 months of 0%, you still owe about £1,050, and the meter switches on at around 30.9%. Interest starts again at about £24 a month, on a debt you have now been carrying for over three years.
Some people then transfer again to another 0% card, pay another fee, and keep going. The industry has a name for them: rate surfers. It is survivable, but look at what is actually happening: the debt is not dying, it is being carried from bank to bank, each one taking a fee at the door. Moving debt is not shrinking debt. Only payments shrink debt.
The sneakiest moment comes right after a transfer, and it is a feeling, not a fee. Your old card now reads £0. It feels like finishing. It is not finishing: the debt is alive and well at a different address, and the old card is now an empty credit line whispering that a little spending would be fine.
Spend on either card and the trap closes twice over: new purchases on the 0% card often charge full interest immediately (the 0% is usually for the transferred balance only), and new spending on the old card rebuilds the exact debt you just paid a fee to escape. One debt becomes two. The move: after transferring, the old card gets cut up or frozen in the app, and the new card is never used in a shop. It has one job: dying quietly.
The small print that actually matters
Three lines decide whether the deal works. One: miss a single monthly minimum payment and most providers can cancel your 0% rate on the spot, dropping you to the full APR years early. A direct debit for at least the minimum makes this risk zero. Two: the advertised window is "up to" 38 months, and the representative rules from our APR page apply here too: a thin credit file may be offered fewer months or refused. Three: the fee is added to the debt itself, so your real starting balance is £2,070, not £2,000. Divide that by the months.
The moves
- Do the two-fee check before transferring. The fee versus the interest you will save. A £70 fee against £50 a month of interest pays for itself in six weeks. A fee to escape a 0% deal that still has a year left does not.
- Set the escape payment on day one. Balance plus fee, divided by the months, as a standing order. This one action is the difference between the smart version and the treadmill.
- Calendar the cliff. The month the 0% ends goes in your phone the day you are accepted, with a reminder two months early. The rate after the cliff is often around 30.9%.
- Freeze the old card, do not close it straight away. Closing it can dent your credit file by cutting your available credit. Freezing it removes the temptation while keeping the history.
- Never spend on the transfer card. It has one job.
- Use a soft-search eligibility checker first. A refused application is a hard search on your file for nothing. Check odds quietly before applying, as covered on our credit scores page.
- Today's longest window and fee. MoneySavingExpert: balance transfer cards: up to 38 months at 0% (TSB), 3.49% fee, reverting to up to 30.9% representative APR. Checked 25 August 2026.
- Typical fees across the market. Uswitch: balance transfer guide: most fees run roughly 2% to 4%, with occasional no-fee deals on shorter windows.
- The comparison rate. Average UK credit card APR: about 36.8% (May 2026).
- Our arithmetic. £2,000 at 34.9% costs about £50.52 in month one. 3.49% of £2,000 is £69.80. £2,000 ÷ 38 = £53 a month. £25 a month for 38 months leaves £1,050. Reproduce any of it on a calculator.
Questions people ask
How does a balance transfer work?
You apply for a card that offers 0% on transferred balances. If accepted, the new bank pays off your old card and the debt moves to the new card, plus a one-off fee of roughly 2% to 4%. You then owe the new bank, interest free for the stated window, currently up to 38 months. The debt itself has not shrunk by a pound: only the interest has stopped.
Is there a catch with 0% balance transfers?
Three. The fee is added to your debt. Miss a monthly minimum and the 0% can be cancelled on the spot. And when the window ends, the rate jumps to the card's full APR, often around 30.9%, which is where the bank makes its money back from everyone who did not finish. The escape is a standing order for the balance divided by the months.
What is a balance transfer fee?
A one-off charge, usually 2% to 4% of the amount moved, added to the new balance. On £2,000 at 3.49% that is £69.80. Against £50 a month of interest at 34.9%, it pays for itself in about six weeks. Occasional no-fee deals exist with shorter 0% windows, and for small debts they can be the better sum.
Do balance transfers hurt your credit score?
The application is a hard search, and a new account briefly lowers the average age of your file, so expect a small dip. Done once, with the debt then falling every month, the medium-term effect is usually positive: falling balances and on-time payments are exactly what the file rewards. Serial transfers every year read differently.
Can I transfer a balance at 18 or with no credit history?
Legally yes from 18, but the best 0% windows go to established credit files. A thin file is often offered fewer months, a smaller limit or a refusal, and each refusal is a hard search. Use a soft-search eligibility checker first, and treat any accepted window, even a short one, with the same escape-payment rule.
Read next
- APRWhat is APR? The number that decides everything
- DebtCrazy APRs: payday loans, BNPL and other rockets
- CreditCredit scores: who is keeping score on you?
Last checked 25 August 2026. Figures are re-verified whenever this page is updated.