Repayment
When to use savings to clear debt, and when not to
Holding cash while paying interest on a balance usually costs money, and emptying the account entirely usually costs more.
There is a settled way of talking about using savings to repay debt. It is worth asking how much of it survives contact with the detail.
The argument in brief
- Debt almost always costs more than savings earn, so clearing it is usually the better return.
- A buffer prevents the next surprise going back onto the card.
- Some money should not be touched: emergency access, tax owed, and anything with penalties for withdrawal.
The basic comparison
Money in a savings account earns a rate; money owed on a card costs a rate that is usually several times higher. Using savings to clear that balance is effectively a guaranteed return equal to the interest you stop paying. It also carries no risk, which almost no investment can claim.
For expensive revolving debt, this arithmetic is rarely close.
Why not to use all of it
Clearing every debt with every pound leaves no capacity for a car repair, a boiler, or a month of reduced income. The next surprise then goes back onto the card, at the same rate you just paid off. Keeping a modest accessible buffer costs a small amount of interest and prevents that cycle.
Rebuild the buffer first, then attack the debt, then rebuild further.
Money that is not really yours
Tax set aside, money held for someone else, or funds earmarked for a committed expense should not be used regardless of the arithmetic. Self-employed people in particular should treat provisional tax reserves as untouchable. Borrowing from those reserves to clear a card converts a manageable debt into a deadline with penalties attached.
The interest saving never compensates for a missed tax payment.
Accounts with strings attached
Fixed-term savings, notice accounts and some tax-advantaged products carry penalties or lost allowances on withdrawal. Employer-matched pension contributions are money you would be giving up, and in many countries the money is inaccessible anyway. Rules differ enormously by country, so check the specific consequences before withdrawing from anything structured.
Where there is a penalty, include it in the comparison rather than ignoring it.
Order of attack
Clear the most expensive debt first with whatever savings you have decided to deploy. Cash advances and overdrafts often cost more than card purchases, so check the actual rates rather than assuming. Do not use savings on a promotional zero per cent balance while a standard-rate balance exists elsewhere.
Put simply, where a debt is in a formal arrangement or dispute, take advice before paying a lump sum into it.
None of this is a substitute for talking to a clinician if something feels wrong.
After the payment
Reduce or close the facility you just cleared if you are likely to reuse it, and understand the utilisation effect before closing. Redirect what you were paying in interest into rebuilding the buffer, since that money is now free. Check the file a cycle or two later to confirm the cleared balance is reported.
In practice, if clearing the debt is only possible by emptying everything, that is a signal to talk to a free adviser rather than to strip the account.
The takeaway
Keep enough cash to absorb a surprise, then use the rest on the most expensive balance you owe.
Pick the one that costs you least, and let the rest wait.
Questions readers ask
Should I clear my mortgage or my credit card first?
Compare the rates. Unsecured revolving debt is almost always more expensive, and overpaying secured borrowing may carry early repayment charges.
How big should the buffer be before I attack debt?
Enough to cover the ordinary surprises that would otherwise go on a card. The exact figure depends on your outgoings and income stability, not on a universal rule.
