Balance transfers work until the promotional period ends

What follows is an argument about balance transfers, and about where the received version of it stops being true.

Do the arithmetic first

A transfer costs a fee, typically a percentage of the amount moved, charged at the outset. It is worth doing when that fee is less than the interest it avoids over the period you will actually take to repay.

For a balance you will clear in two months, a fee-free but shorter offer may beat a longer one with a fee. Fees are often quoted as a percentage with a stated minimum charge, so on a small balance the minimum dominates and the effective cost is well above the advertised percentage.

Set the repayment against the deadline

Divide the balance by the number of promotional months and pay that amount, rather than the minimum. Paying the minimum through a promotional period leaves most of the balance intact at reversion, which defeats the purpose. Setting a standing order at the calculated figure removes the decision each month.

Count from the date the promotion ends rather than the date you applied, because the clock in most terms starts at account opening and any delay in the transfer arriving eats into it.

Do not spend on the card

Purchases on a balance transfer card usually attract the standard purchase rate immediately. Payment allocation rules generally direct payments to the highest-rate balance above the minimum, so purchases can persist. The clean approach is to transfer, freeze the card and repay.

For most people, some cards do run a separate promotional rate on purchases, ending on a different date from the transfer offer, which is the version most likely to catch someone who read only the headline.

Transfers do not reduce what you owe

The debt is unchanged; only its cost has been paused. Serial transferring without repaying is a common pattern that ends when applications stop being accepted. Each transfer also creates an application and a new account on the file.

Acceptance at the limit you need is not guaranteed either, and a partial transfer leaves the remainder on the original card at the original rate, which changes the arithmetic you did.

When a transfer is the wrong tool

Where repayments are already unaffordable, a transfer postpones a problem that needs addressing. Free debt advice services in most jurisdictions can negotiate, arrange formal solutions and stop interest entirely.

Using them is not a last resort and does not cost anything. The distinction worth holding onto is between a cash-flow problem, which a transfer can genuinely relieve, and an income that does not cover essentials, which it cannot.

None of this is a substitute for talking to a clinician if something feels wrong.

What happens on the reversion date

Whatever remains moves to the standard rate on a fixed date and accrues interest from then in the ordinary way. Deciding what to do about it in the final month is a weaker position than deciding in the first, because acceptance for a further transfer depends on how the file looks after a year of carrying the balance. If a further transfer is not available, the realistic options narrow to a fixed-term loan, a negotiated arrangement with the issuer, or paying the reverted rate.

Where none of those is affordable, a free debt adviser can usually get further with an issuer than an individual can, and that call is better made before the date than after it.

The takeaway

Divide the balance by the promotional months and pay that. Otherwise it is a postponement.

Small and repeatable beats ambitious and abandoned, almost every time.