When Does an Overdraft Have to Be Paid Back?

Why there is no due date

A loan has a term because the amount is fixed at the start. The bank knows exactly how much you borrowed, so it can compute a schedule that reduces it to zero.

An overdraft has no fixed amount. The balance moves every time money enters or leaves the account, often several times a day. There is nothing to build a schedule around — the debt at the start of any month is not a stable figure.

So instead of a term, the facility is granted on a different basis: it exists for as long as both sides are content, and either side can end it. You end it by repaying and asking for it to be removed. The bank ends it by demanding repayment.

That is not a loophole. It is the structural consequence of lending against an account balance rather than a fixed sum.

What "repayable on demand" means

The phrase is in most overdraft agreements and it means what it says: the bank may require the full balance back, and does not have to wait for you to default on anything.

Read strictly, that is a striking amount of power. Read practically, it is a facility that has been extended on trust and can be withdrawn if the basis for that trust changes.

What it does not mean:

• It does not mean you have done something wrong if the facility is reduced. Banks review portfolios and change their appetite for whole categories of customer.
• It does not usually mean immediately. In most jurisdictions, banks are expected to give reasonable notice before reducing or removing a facility, and to treat customers in difficulty fairly.
• It does not mean the debt disappears if the account closes. Closing the account does not close the balance.

What actually happens in practice

Sudden full demands on ordinary personal accounts are rare. The common sequence is gradual and gives plenty of signal, provided you read your post.

1. A review. The bank reassesses the facility, often annually or when something changes.
2. A reduction. The limit drops — say from 1,500 to 1,000 — with notice. If your balance is above the new limit, you are now unarranged on the difference.
3. A notice period to bring the balance down. Usually weeks, sometimes longer.
4. Removal of the facility, if the balance has not come down or the concern was not addressed.
5. Formal demand, and then the usual arrears process if it is not met.

The step that catches people is the second one, because a limit reduction feels administrative and is not. If your balance sits at 1,400 and the limit falls to 1,000, you have not been charged anything yet — but every payment from that point is a decision the bank makes rather than a certainty, and the reliability of your direct debits has just changed.

What triggers a bank to call it in

Roughly in order of how often they matter:

• The balance never returns to positive. A facility intended for short-term smoothing that behaves like a permanent loan is the single most common trigger for review.
• Persistently at or near the limit, which reads as no headroom rather than occasional use.
• Refused payments and returned direct debits, which suggest the account cannot meet its obligations.
• A change in your credit file — a default elsewhere, a sharp rise in other borrowing, a county court judgment or its local equivalent.
• Income stopping. Banks notice when a regular salary credit disappears, and an overdraft granted against an income that no longer arrives looks different.
• Account inactivity, or a decision to close or convert the account type.
• Bank-side changes that have nothing to do with you: a product being withdrawn, a policy change, an appetite shift after a merger.

Notice that most of these are visible to you before they are acted on. The account behaviour that triggers a review is behaviour you can see in your own statements.

Notice, and what you are usually entitled to

Specifics vary by country, but the common expectations are worth knowing so you can tell ordinary practice from unfair treatment.

• Advance notice of a reduction or removal, in writing, with a date.
• A reasonable period to respond, rather than an instruction taking effect the same day.
• Fair treatment if you are in financial difficulty, which in many jurisdictions is a regulatory requirement rather than a courtesy. That usually includes considering an arrangement to repay over time.
• A complaints route, and beyond it an independent ombudsman or equivalent body in most developed markets.

If a facility is withdrawn with no notice and no explanation, that is worth raising through the bank's formal complaints process rather than accepting. Regulators generally expect an explanation, even where the bank was entitled to act.

What happens if it isn't repaid

The escalation resembles other unsecured debt, with one wrinkle particular to overdrafts.

1. Interest keeps accruing daily throughout, which is the wrinkle. Unlike a defaulted loan where the balance is often frozen at a point, an overdraft continues to compound unless and until the bank stops it.
2. Formal demand, setting a date.
3. Default recorded on your credit file, which is the point at which it becomes visible to other lenders for years.
4. The account is closed or frozen and the balance moves to a recoveries function.
5. Possible sale to a debt purchaser, who then owns the debt and contacts you instead.
6. Legal action in a minority of cases.

One specific mechanism deserves attention: set-off. Many banks reserve the right to move money from another account you hold with them, or with the same banking group, to reduce a debt. It is why keeping savings at the same institution as an overdrawn current account is worth thinking about in advance rather than discovering afterwards. Rules on when set-off may be used differ by country, and some protections exist, but the right is commonly reserved in the terms.

Permanent overdrafts and why banks watch them

Lenders have a name for an overdraft that never clears — often "hardcore" borrowing. It describes the portion of the balance that is always present, regardless of the month.

They watch it because it signals that the facility is not doing the job it was granted for. An overdraft is priced and provisioned as short-term smoothing. When it becomes a permanent loan by accident, the bank is holding long-term debt at a product designed for something else, and that usually prompts one of two conversations: reduce the facility, or convert it to a loan with an actual repayment schedule.

The second option is sometimes genuinely better for the borrower, because a loan has the one thing an overdraft structurally lacks — a mechanism that reduces the balance to zero on a known date. Whether it is better in a particular case depends on the rate and the circumstances, which is exactly the kind of judgement this site does not make for you.

The practical reading

1. Find out whether your balance ever returns to positive. Look at three months of statements and count the days at or above zero. If the answer is none, the facility has quietly become a permanent debt.
2. Read any letter about a limit change on the day it arrives. That is the notice period starting, and it is the cheapest moment to act.
3. Know the hardcore figure — the amount you never get above. That, not the limit, is what you would actually have to repay.
4. Do not assume closing the account clears the balance. It does not.
5. If repayment is not realistic, say so early. Banks have processes for this, and engaging before a default is recorded gives you options that disappear afterwards.
6. Free debt advice exists in most countries and is genuinely free. It is a better first call than any commercial service that charges for the same thing.