Does a business overdraft affect your personal credit?

Usually not directly. A limited company's overdraft is recorded on the company's credit file, not yours. It can affect your personal credit in two ways: a credit check on you when the company applies, and – the bigger risk – a personal guarantee that the bank calls in when you can't pay.

When a limited company applies to iwoca, we run a soft search on directors' personal credit files, which doesn't affect their scores, and a hard search on the company's file.

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A company overdraft sits on the company's credit file

A limited company is a separate legal entity, so its business overdraft and the way the company uses it are recorded on the company's credit file. Being a director of a company that falls behind doesn't, by itself, touch your personal credit record.

R3, the trade body for insolvency and restructuring professionals, says a company defaulting on a loan, or even entering insolvency, 'will not have an impact on their personal credit record' for its directors. The exception is a personal guarantee, which can move the debt onto you.

The company's own file does take the hit. Missed repayments can lead to a poor business credit file, which makes the company's next application harder.

A personal overdraft works differently. Experian says a personal overdraft 'will appear on your credit report as a debt' . That's one reason to keep company spending on the company's account.

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Lenders often check your personal credit when the company applies

Many lenders check the directors as well as the company, so an application can leave a search on your personal credit file. A hard search is visible to other lenders, but it usually only lowers your score if you make several applications in a short time.

Lloyds, for example, says it needs 'your permission to carry out a credit check on you and your business' before it lends. Experian explains that a hard search 'will only impact your credit score if you make a lot of applications for credit in a short space of time'. A soft search isn't visible to other lenders and doesn't affect your score.

Your own credit history matters more when the company is young. GOV.UK notes that lenders are more likely to ask for a personal guarantee when a company is newly formed, has a limited trading history, or has a poor or no credit rating. Before you apply, ask the lender whether it runs a hard or soft search on directors.

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Big banks usually ask directors for a personal guarantee

For a small limited company, a personal guarantee is usually part of the deal for a bank overdraft. Barclays, Santander, and Lloyds all say so on their own overdraft pages.

A personal guarantee is your legal commitment to repay the company's debt yourself if the company can't. This is what three banks say (checked 12 October 2026):

Sources: Barclays, Santander business overdrafts, Santander personal guarantees, and Lloyds Bank.

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Your personal credit is at risk if a guarantee is called and you can't pay

Signing a personal guarantee doesn't affect your credit score. The risk starts if the company can't repay, the bank asks you to pay under the guarantee, and you then miss payments or face court action.

The British Business Bank puts it this way: 'Signing a personal guarantee doesn't affect your credit score, but if the business defaults on loan payments and you then miss personal payments, it could harm your personal credit score'. With an overdraft, it usually plays out in this order:

1. The bank asks the company to repay. Business overdrafts are repayable on demand, and a bank can reduce or withdraw one at short notice.
2. The company can't clear the balance. That's recorded on the company's credit file.
3. The bank calls in the guarantee. The lender will usually write to you, as guarantor, to ask for payment.
4. You pay what the guarantee covers. In that case, the guarantee itself doesn't usually leave a mark on your personal file.
5. You can't pay, and your personal credit takes the hit. Missed payments can harm your score, and the lender can take you to court. A county court judgment (CCJ) stays on record for 6 years unless you pay in full within a month.
6. Your assets can be at risk. GOV.UK warns that your home, car, savings, and investments could be used to settle the company's debt, and that you could be declared bankrupt if they don't cover it.

If more than one director signs, the guarantee is often joint and several. That means each of you can be asked for the full debt, not just a share. The same chain applies to a guaranteed loan: see how a business loan affects your personal credit.

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Check these points before you sign a guarantee

The terms of a guarantee decide how much of your own money is at stake, so read them before you sign. Check these points, and ask an independent adviser about any you're unsure of:

• How much you're guaranteeing. A limited guarantee covers a set amount stated in the agreement. An unlimited one makes you responsible for the full debt, including interest, fees, and costs.
• Who else is signing. With a joint and several guarantee, each guarantor can be asked for the whole debt.
• What happens if you leave. Resigning as a director or closing the company doesn't necessarily end the guarantee: Begbies Traynor notes the lender will still usually be able to enforce it. Santander says an unlimited guarantee continues until the lender releases you from it.
• Whether insurance makes sense. Personal guarantee insurance can protect your personal assets if the company can't pay .
• Independent advice. GOV.UK recommends independent specialist advice before you agree, and Santander recommends independent legal advice before you sign.

A stronger company credit file helps too, because lenders lean harder on directors when a company has a poor or no credit rating. It's worth taking the time to build your company's credit score. iwoca Credit Compass is free and shows your company's Equifax business credit score plus four more scores, what's affecting them, and areas to improve.

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How iwoca's checks and personal guarantee work

iwoca doesn't offer an overdraft, but our iwoca Flexi-Loan is a business loan with flexible repayment options, so the same questions apply. Applying won't affect your personal credit score, and every new Flexi-Loan needs a personal guarantee from at least one director.

This is how it works with us:

• Our checks. When a limited company applies, we run a soft search on directors' personal credit files, which doesn't affect their scores. We run a hard search on the company's credit file.
• The guarantee. At least one director signs a personal guarantee, but not every director has to..
• Security. We don't take property as security at the start of the loan..
• Your debt. iwoca has never sold its debt.

With a Flexi-Loan, UK limited companies can borrow up to £1m over up to 5 years, and get a decision within 24 hours. If you'd rather not give a personal guarantee at all, a Flexi-Loan isn't the right fit.

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Business overdrafts usually cost less than personal ones

At the big banks, a business overdraft usually has a lower interest rate than a personal one, but it comes with an arrangement fee. Santander's own rates show the gap.

Santander also charges a 1.75% annual arrangement fee (minimum £100) on its business overdraft. Rates checked on Santander business overdrafts, Lloyds Bank, and Santander's overdraft cost calculator on 12 October 2026.

The rate is only part of the choice. To weigh limits, fees, and terms side by side, compare business overdrafts from the main banks.

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Frequently asked questions

Does a personal guarantee show on my credit file?

Signing one doesn't affect your credit score, according to the British Business Bank. It starts to matter if the guarantee is called and you then miss payments.

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Can the bank ask for the overdraft back at any time?

A bank can ask the company to repay a business overdraft on demand. It can also reduce or withdraw the limit at short notice.

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If there are two directors, am I liable for the whole debt?

You could be, if the guarantee is joint and several. GOV.UK describes this as multiple guarantors each being liable for the full debt.

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How does an overdraft affect my company's credit?

The company's credit file records the overdraft and how it's run. Missed repayments can lead to a poor business credit file, and you can check your company's Equifax business credit score for free in Credit Compass.