Business Overdraft vs Business Loan: Which One Fits?

Claire had used the same £30,000 overdraft for nine years. It flexed with her garden centre — deep in February, back to nothing by July — and she barely thought about it. Then a letter arrived reducing it to £10,000 with thirty days’ notice. Nothing had gone wrong. The bank had simply changed its mind, as it was entitled to. That is the part of the business overdraft vs business loan question that the comparison tables never put first, and it matters more than the rate.

	Overdraft	Business loan
Legal position	Repayable on demand	Fixed contracted term
Interest charged on	Only what you draw	The whole balance
Typical cost (Sept 2026)	About 6.75% – 12.75%	6% – 15% unsecured
Repayment	Flexible, no schedule	Fixed monthly
Suits	A gap that moves and returns to zero	A known, one-off amount
Certainty	Low	High

The difference that actually matters

Almost every guide compares these two on price. Price is the less important half. A business overdraft is legally repayable on demand, which means the bank can reduce it or pull it altogether, usually with notice but not always much. A loan cannot be recalled like that; you have a contract and a schedule and the bank has to live with it. Claire had treated nine years of reliability as proof of permanence, and it was nothing of the kind. Over the past few years banks have steadily shrunk and withdrawn business overdrafts, so for a lot of firms the binding constraint is not what an overdraft costs but whether you can still get one.

How an overdraft actually works

An overdraft is a tap rather than a bucket. You agree a limit, you draw what you need, and you pay interest only on the amount you are actually using on any given day. For a business whose cash swings about — seasonal trade, lumpy customer payments, stock bought ahead of a busy period — that flexibility is genuinely valuable, because you are not paying for money sitting idle. The pricing is usually a margin of three to eight per cent over the Bank of England base rate, which at 3.75% puts most facilities somewhere between roughly 6.75% and 11.75%. Watch for the extras though: arrangement fees, annual renewal fees, and much steeper rates if you go beyond the limit.

How a loan actually works

A loan is the opposite shape. You borrow a set amount for a set period and repay it on a schedule you know in advance. Interest runs on the whole balance from day one, so if you only need the money occasionally it is the more expensive choice. But you get certainty, and certainty has real worth when you are planning. Unsecured business loans generally sit somewhere between 6% and 15% depending on how strong your file looks, and a secured or government-backed facility can land in single digits, around 6% to 10%. The schedule also does something an overdraft never does: it forces the debt down instead of letting it sit.

The comparison people get wrong

Because an overdraft charges only on what you draw, it looks cheaper than a loan at the same headline rate. That is true if you dip in and out. It stops being true the moment the balance stops moving. Claire’s overdraft cost very little across a year because it spent half of it at zero. A business sitting at its limit every single day is paying the higher rate on the full amount permanently, with none of a loan’s protection. So do not compare the rates; compare what the balance actually does over twelve months. A cash flow forecast answers that question in about twenty minutes.

The trap almost nobody names

Here is the test worth applying honestly. If your overdraft has not returned to zero in the last twelve months, it is not a buffer any more — it is permanent debt, priced like short-term borrowing and withdrawable at short notice. That is the worst combination available. The fix is usually to refinance the hardcore portion into a term loan, keeping a smaller overdraft for genuine fluctuation. It feels like a step backwards and it is almost always a step forwards, because you swap a facility that can vanish for one that cannot, and you put an end date on money that had quietly stopped having one.

The government scheme that covers both

Worth knowing about before you accept whatever your bank offers first. The British Business Bank’s Growth Guarantee Scheme, running with accredited lenders since July 2024, supports term loans, overdrafts, asset finance and invoice finance, generally up to £2 million. It is designed to unlock around £6.5 billion of lending over four years for an estimated 33,000 businesses. From July 2026 it stretched further: terms of up to ten years on term loans and asset finance, and the turnover ceiling lifted from £45 million to £54 million. If a lender has not mentioned it, ask whether they are accredited.

What the lender is weighing up

Both decisions come down to the same handful of things, and knowing them changes how you apply. Lenders look at how long you have traded, whether your accounts are filed on time and in full, your payment record with suppliers, how much of your existing credit you are already using, and whether the money has an obvious purpose. An overdraft application leans harder on how your account behaves day to day, which is one good reason to run everything through a proper business bank account. A loan application leans harder on the plan, so a short, honest business plan for funding with real numbers does more work than any amount of optimism. Expect a personal guarantee on either if the company is young.

So which one should you take?

Ask what shape the need is, not what it costs. If the amount moves up and down and genuinely comes back to zero, that is an overdraft. If it is a known sum for a known purpose, take a loan and get the certainty. If what you actually need is a machine, neither of these is right — use asset finance. If the hole is unpaid invoices, look at invoice finance instead, and if you take a lot of card payments a merchant cash advance is another shape again. Matching the tool to the problem saves more money than shopping for a rate ever will.

What Claire did next

She moved £20,000 of the balance onto a five-year loan, kept a £10,000 overdraft for the February dip, and stopped relying on a facility that could be halved by letter. Her total interest went up slightly. Her risk went down enormously, and that was the trade worth making. The honest answer to business overdraft vs business loan is that most established firms need a little of both, sized deliberately rather than by accident. Before you apply for either, tidy your business credit profile — the rate you are offered was largely decided months ago, and it is worth seeing where both products sit against the wider range of funding routes before you commit to either.

Frequently asked questions

What is the difference between a business overdraft and a business loan?

An overdraft is flexible borrowing on your bank account, repayable on demand. A loan is a fixed amount over a fixed term with a set repayment schedule.

Is a business overdraft cheaper than a loan?

Only if you dip in and out. You pay interest just on what you draw, so an overdraft used constantly at its limit usually works out more expensive.

Can a bank withdraw my business overdraft?

Yes. Business overdrafts are legally repayable on demand, so a bank can reduce or cancel the facility, often with only short notice.

What are business overdraft rates in the UK?

Typically three to eight per cent above the Bank of England base rate. With base at 3.75%, that is roughly 6.75% to 11.75% on drawn balances.

What is the Growth Guarantee Scheme?

A British Business Bank scheme supporting loans, overdrafts and asset finance up to £2 million, giving lenders a 70% government guarantee so they lend more readily.

Does a government-backed loan mean I owe less if it fails?

No. You remain 100% liable for the full debt. The guarantee protects the lender only, and any personal guarantee you gave still stands.

This article is general information, not financial advice. Rates quoted reflect the position in September 2026 with the Bank of England base rate held at 3.75% on 17 September 2026; pricing moves with it. Terms vary by lender and by business — check current rates and take professional advice before borrowing.