Are Business Credit Card Fees and Interest Tax-Deductible in the UK?

What Business Expenses Are Tax-Deductible in the UK?

An expense is tax-deductible in the UK when it is incurred "wholly and exclusively" for the purposes of the trade. That phrase comes from HMRC's own guidance and it is the single most important test for any business cost, including credit card charges.

Allowable expenses for most UK businesses include:

• Office costs (rent, utilities, stationery)
• Staff wages and employer National Insurance contributions
• Stock, raw materials, and goods bought for resale
• Marketing and advertising spend
• Professional fees (accountants, solicitors)
• Bank charges and finance costs, which is where credit card fees and interest sit. For additional context, see a deeper look at business credit card APR.
• Travel costs that are wholly for business purposes

What is not deductible: personal spending, client entertainment (in most cases), fines and penalties, and any cost with a dual personal/business purpose that cannot be cleanly separated.

The credit card itself is just a payment method. HMRC cares about what the money was spent on, not how it was paid. So the deductibility of any credit card charge flows from the nature of the underlying purchase.

Can You Claim Credit Card Interest as a Business Expense in the UK?

Yes. Credit card interest paid on business expenditure is an allowable finance cost under HMRC rules. If a business carries a balance on a credit card and that balance relates to business purchases, the interest charged is deductible against business profits.

This applies to:

Interest on carried balances

from business purchases

Cash advance fees

if the advance was used for a business purpose (though cash advances are expensive and best avoided)

Late payment charges

on a business card, provided the underlying spend was business-related

The portion of interest that relates to any personal spending on the same card is not deductible. If a card is used for a mix of business and personal spending, the interest must be apportioned. That apportionment is the account holder's responsibility to calculate and document.

For limited companies, credit card interest is treated as a finance charge and reduces the company's taxable profit. For sole traders, it reduces the taxable profit shown on the Self Assessment return.

Are Credit Card Fees Tax-Deductible for the Self-Employed in the UK?

Self-employed individuals, whether sole traders or partners in a business partnership, can claim credit card fees as an allowable expense, subject to the same "wholly and exclusively" test that applies to any other business cost.

Claimable fees typically include:

• Annual card fees on a card used for business
• Monthly maintenance fees
• Foreign transaction fees on overseas business purchases
• Balance transfer fees, if the transfer relates to business debt

Self-employed people report these costs on the SA103 (Self-employment) supplementary pages of their Self Assessment return, under "Finance charges, bank interest and other financial costs."

Sole Trader vs Limited Company: Credit Card Tax Deductions

The tax relief is available to both structures, but the mechanics differ.

For the wider context, read a closer look at no-annual-fee business credit cards.

For limited companies, a director using their personal credit card for company expenses and then claiming reimbursement is a common and acceptable approach, but the company needs receipts and a clear expense claim process. If the company pays a director's personal credit card bill directly, any personal spend on that card could be treated as a benefit or a director's loan, which has separate tax consequences.

Business Credit Card Interest vs Personal Credit Card: Tax Treatment

The distinction between a business credit card and a personal credit card matters less than most people assume, HMRC's test is about the purpose of the spending, not the type of card. That said, the practical difference is significant.

Business credit card: Interest is almost always fully deductible because the card is (or should be) used exclusively for business. The statement itself acts as a clean record of business expenditure.

Personal credit card used for business: The interest is still deductible in principle, but only on the proportion that relates to business spending. Separating that from personal spend, and proving it to HMRC, is the problem. A card statement showing a mix of Amazon orders, restaurant bills, and supplier invoices is not clean evidence.

The tax treatment of the underlying purchase does not change based on which card was used. A non-deductible personal expense stays non-deductible whether it was paid on a business card or a personal one.

For a broader look at how different financing tools compare on cost and flexibility, the business overdraft vs line of credit vs loan guide covers the trade-offs in detail. For the wider context, read a closer look at business credit cards in the UK.

Do You Need a Separate Business Credit Card to Claim Interest?

No, HMRC does not require a dedicated business credit card to claim interest or fees. A sole trader can use a personal card for business spending and still claim the relevant costs.

But "can" and "should" are different things.

A dedicated business credit card creates a clean paper trail. Every transaction on the statement is a business transaction. There is no need to go through twelve months of statements highlighting which charges were for the office printer and which were for a personal holiday.

For limited companies specifically, mixing company and personal spend on the same card creates accounting complications that go beyond tax deductibility. It can blur the line between the company's money and the director's money, which matters for both tax and legal reasons.

What If You Use a Personal Card for Business Expenses, Can You Still Claim?

Yes, you can still claim. The expense is deductible based on what it was spent on, not which card was used.

For sole traders, the process is straightforward: identify the business transactions on the personal card statement, keep the receipts, and include the costs in the relevant expense categories on the SA103.

For limited company directors, the standard approach is to submit an expense claim to the company, which then reimburses the director. The company records the expense (and can deduct it); the director is made whole. The interest on the personal card is slightly more complex, the director paid it, not the company, so the company cannot directly deduct it. The director could claim the interest as part of the expense reimbursement if they can show it relates to business spending, but this needs careful documentation and is worth discussing with an accountant.

The simpler fix, for any business doing this regularly, is to get a business card and stop the problem at source.

How Do You Claim Credit Card Fees on Your Tax Return in the UK?

The process depends on your business structure.

Sole traders (Self Assessment):

1. Gather credit card statements for the tax year (6 April to 5 April)
2. Identify all business-related transactions and the fees/interest charged on those balances
3. Total up the finance charges attributable to business use
4. Enter the figure in the "Finance charges, bank interest and other financial costs" box on the SA103 supplementary pages
5. Keep statements and receipts for at least five years after the filing deadline

Limited companies (Corporation Tax):

1. Record credit card fees and interest as finance charges in the company's bookkeeping software throughout the year
2. These reduce the company's profit before tax in the accounts
3. The accounts feed into the CT600 Corporation Tax return
4. The accountant or director files the CT600 with HMRC within 12 months of the company's accounting year-end (payment is due nine months and one day after year-end)

There is no separate form or special claim process for credit card costs, they sit within the normal expense categories on the relevant return.

What Receipts Do You Need for Credit Card Expense Claims in the UK?

HMRC expects businesses to hold records that support every expense claimed. For credit card costs, that means:

• Credit card statements showing the charges and interest
• Receipts or invoices for the underlying purchases (the statement alone is not sufficient for the purchases themselves)
• A log or note explaining the business purpose of any transaction that is not self-evident from the description
• For mixed-use cards: a calculation showing how you apportioned fees and interest between business and personal use

HMRC can ask to see records up to six years back for most businesses (longer if there is suspected fraud). Digital copies are acceptable, scanned receipts stored in accounting software or a cloud folder are fine.

A common time-saver: business cards that integrate with accounting software (such as Xero or QuickBooks) can auto-categorise transactions and attach receipts digitally, cutting month-end admin significantly.

Are There Limits on How Much Credit Card Interest You Can Claim?

There is no fixed monetary cap on credit card interest deductions for most UK businesses. You claim what you actually paid, on the portion of spending that was genuinely for business.

The practical limits are:

The "wholly and exclusively" test

, personal spend on the same card reduces the claimable proportion

The actual interest charged

, you cannot claim more than you paid

For limited companies with significant interest costs:

HMRC's Corporate Interest Restriction (CIR) rules can limit the amount of interest a large company can deduct, but these apply to groups with net interest above £2 million per year. For the vast majority of SMEs, the CIR is not relevant.

For most small businesses carrying a modest balance on a business card, the full interest charge is deductible with no restriction.

For context on how finance costs are treated across different borrowing types, the average business loan interest rates UK guide and the invoice financing costs in the UK guide cover the broader picture.

How to Record Credit Card Fees in Business Accounts for Tax

Clean bookkeeping makes the tax claim straightforward and protects you if HMRC ever queries the figures.

Keeping credit card accounts separate in your bookkeeping software, rather than lumping them into a general bank account, makes reconciliation faster and gives your accountant a clean view of what was spent and when.

For a broader look at managing business finances, the small business financial health masterclass covers cash flow, record-keeping, and planning in one place.

Common Mistakes When Claiming Credit Card Expenses for Tax in the UK

These are the errors that cause problems, either a rejected claim or an unwanted HMRC enquiry.

1. Claiming the full interest on a mixed-use card If a card is used for personal and business spending, only the business proportion of the interest is deductible. Claiming 100% when 30% of the spend was personal is incorrect.

2. Claiming the purchase cost and the interest as two separate deductions The purchase cost is deductible as a business expense. The interest is deductible as a finance charge. Both are claimable, but they are different things. Some business owners accidentally double-count or omit one. Make sure both are captured in the right category.

3. No receipts for the underlying transactions The credit card statement shows that money was spent. It does not prove the purchase was for business. HMRC expects receipts or invoices for the transactions themselves.

4. Forgetting annual fees Annual card fees are deductible but easy to miss because they appear once a year. Check December and January statements in particular.

5. Limited company directors treating a personal card bill as a company expense without an expense claim The company cannot simply pay a director's personal credit card bill and call it a business expense. There needs to be a proper expense claim with receipts. Without one, the payment could be treated as a director's loan or a benefit-in-kind.

6. Mixing up the tax treatment of the card fee with the tax treatment of the purchase The card fee is always a finance charge. The purchase might be capital expenditure (claimed via capital allowances) rather than a revenue expense. Using a credit card to buy a piece of equipment does not turn the equipment cost into a revenue expense, it remains a capital item.

Next steps

The answer to whether business credit card fees and interest are tax-deductible in the UK is yes, with one consistent condition: the spending must be wholly and exclusively for business. Annual fees, monthly charges, foreign transaction fees, and interest on carried balances all qualify. The card type matters less than the purpose of the spending and the quality of the records behind it.

For sole traders, the claim goes on the SA103. For limited companies, it sits in the finance charges section of the accounts. Either way, clean record-keeping is what makes the claim stick.

The practical step most businesses can take right now: stop mixing personal and business spend on the same card. A dedicated business card removes the apportionment problem, creates a clean audit trail, and, with the right card, can also earn cashback on the spend you were going to make anyway.

If the current card limit isn't moving, or the high street bank has been sitting on an application for weeks, there are faster routes. Funding Fred's 2-minute eligibility check, no hard credit search, no obligation, matches UK businesses with leading card providers offering limits from £1k to £250k+, with virtual cards, employee cards, and up to 56 days interest-free. Check Eligibility Now and see what's available for your business.

For businesses also looking at how other finance costs are treated for tax, the guides on invoice financing costs in the UK and development finance costs cover the same principles applied to different products.