The 0% Balance Transfer Trap, and How to Track It

I've been caught out by this more than once

I've been stung by a 0% credit card deal ending more than once. I know how balance transfers work. I write about this stuff now. The problem was the one date that matters, the day the 0% runs out, and I kept losing track of it.

The first time, I'd moved a chunk of spending onto a 0% card and told myself I'd clear it well before the deal ended. Then life happened. The end date was in a statement PDF I hadn't opened in months. I found out the way most people do, when a line of interest appeared on the next statement at a rate north of 20%. It wasn't a disaster. It was money I handed over for nothing because I'd lost track of one date.

Why the date is so easy to miss

This part annoys me. When you take the card out, the 0% length is the whole pitch. "0% for 20 months" is on every page. Once you've signed up, the countdown disappears. The end date sits near the bottom of a monthly statement under a heading like "promotional rates", in a document you have to go looking for. It's in the app too, three or four taps deep, if you know which screen to check.

If you want to check it with a person, good luck. More and more, the first thing you hit is a chatbot that sends you anywhere but a human. By the time you've got past it, you've spent twenty minutes confirming a date that should have been a notification. I don't think that's an accident. The card company earns the interest when you forget, so it has no reason to make the date obvious.

A £4,000 balance left on a card at 24.9% costs about £83 a month in interest, or roughly £1,000 over a year. The deal was free money while it lasted. Forgetting the date is what costs you.

So I built the thing I wanted

After the second time, I stopped being annoyed and built it. The idea is simple. One place for every card and its 0% end date, so the countdown sits somewhere you'll see it, not in a PDF you'll never open.

It started as a standalone tracker. It's now part of the Debt tab in WealthR, next to the balances themselves. When you add a credit card as a debt, there's a field for the month its 0% or intro rate ends. The Debt tab then counts down the months left on each card, changes colour as the date gets closer, and flags any deal that has already ended. If a card looks like a 0% deal but has no end date, it asks you for one.

Free in the Debt tab

Track your 0% end dates in WealthR

Add each card as a debt and enter the month its 0% deal ends. The Debt tab counts down the months left on every card and flags any deal that has ended. On Pro, it also shows the monthly payment that would clear each balance before its end date.

Open WealthR →

I dropped the email reminders when the tracker moved into WealthR. The countdown is now on a screen I open every month to update my figures anyway, and that's what made the difference. The date stays in front of me. On Pro it also works out the monthly payment that would clear each balance in time, and shows a tick when what I'm already paying is enough.

Clear it, or ladder it?

If you can clear the balance before the deadline, the maths is easy. Divide what's left by the months remaining and that's your monthly payment. If you can't, the usual alternative is to move what's left onto a new 0% card and keep going without interest. People call this a ladder. It only works if the transfer fees, usually 3 to 5%, stay below the interest you'd otherwise pay, and if you keep getting approved for new cards.

To be clear about what this is: a countdown, not advice. WealthR doesn't recommend specific cards. If you want to compare deals, use an independent comparison site or an FCA-authorised broker. I keep my own balances in my net worth picture for the same reason I built this. A debt you can see is a debt you deal with. And if you want the wider case for avoiding interest wherever you legally can, the Martin Lewis post makes it better than I can.

What WealthR doesn't do

The Debt tab tells you when each deal ends and leaves the next step to you. Recommending or linking to specific credit cards is a regulated activity in the UK, and WealthR isn't authorised by the Financial Conduct Authority. So there are no affiliate links here and no card recommendations, and nothing on this page is a financial promotion. You can see what else is coming on the WealthR roadmap.

Frequently asked

What happens when my 0% balance transfer deal ends?

Any balance left starts to charge interest at the card's standard rate, usually around 20 to 30% APR in the UK, from the day the offer ends. There's no grace period. That's why people either clear the balance or move it to a new 0% card before the date.

Where do I find my 0% end date?

Usually on your monthly statement, often just under the promotional interest line. It's also in your card's app or online banking under account details or promotional rates, and in the email you got when you were approved. The offer usually runs from when you opened the account, not from when you made the transfer.

What's a typical balance transfer fee?

Usually 1 to 5% of the amount you move, often around 3%, charged each time you transfer. That's £120 on a £4,000 transfer at 3%. A fee can still cost less than months of interest at 20 to 30% APR, but the longest 0% deals often have the biggest fees. Which works out cheaper depends on how long you need and how fast you can pay it off.

Can I track my 0% end dates in WealthR?

Yes. Add the card as a debt in the Debt tab and enter the month its 0% or intro rate ends. WealthR counts down the months left on each card and flags any deal once it has ended. On Pro, it also shows the monthly payment that would clear the balance before the end date.

This is a personal account and general information, not financial advice. WealthR is a planning tool, is not authorised by the Financial Conduct Authority, and does not recommend specific credit cards. Rates, fees and rules vary by card and change over time. Check your own paperwork and eligibility, and for personal recommendations speak to an FCA-authorised adviser or broker.