If you’ve paid for a business expense on a personal credit card and are now worried you’ve done something wrong — relax. This is one of the most common anxieties for sole traders, and the answer is simple: it’s completely fine.
A Reddit user on r/HMRC recently asked: “I bought a MacBook for work (sole trader) on my Amex, but claimed on my tax return as an expense. Am I screwed for putting it on my Amex instead of my Revolut business, or is it fine?”
The responses were unanimous: you’re fine. Here’s why, and how to handle it properly.
HMRC Cares About Purpose, Not Payment Method
The test for whether an expense is allowable is whether it is “wholly and exclusively” for your business, as defined in HMRC’s self-employment expenses guidance. HMRC does not check which card you used to pay for it. They check:
- Was the expense for your business?
- Was it wholly and exclusively for business use (or can you identify the business portion)?
- Do you have a receipt or record?
Whether you paid with a personal Amex, a business Revolut, cash, or a friend’s card doesn’t change the tax treatment. The expense is either allowable or it isn’t — the payment method is irrelevant.
For example, if you buy a £1,200 MacBook for your freelance design business on your personal Amex, the expense is allowable because it’s wholly and exclusively for business use. If you buy the same MacBook on a business debit card, it’s allowable for the same reason. The card doesn’t matter — the purpose does.
Sole Traders Don’t Need a Separate Business Bank Account
Unlike limited companies, which are legally required to keep business and personal finances separate, sole traders have no such requirement. According to HMRC’s guidance on sole trader records, you must keep records of your business income and expenses, but there’s no requirement for a separate bank account.
You can run all your business income and expenses through a personal account if you want to. Many sole traders do, especially in the early days when business income is small.
That said, mixing personal and business transactions makes your record-keeping harder. When every transaction in your bank statement is a mix of groceries, client payments, and software subscriptions, it’s much harder to:
- Work out your business income at year-end
- Identify all your allowable expenses
- Spot errors or missed claims
- Respond quickly if HMRC asks questions
- Prepare for Making Tax Digital (MTD), which requires digital record-keeping from April 2026
A separate business account isn’t a legal requirement — it’s a practical one. Most sole traders who open one wish they’d done it sooner. Many business accounts are free or low-cost (e.g., Wise, Mettle, Tide, Revolut Business), and they integrate with bookkeeping software like FreeAgent, Account OS, and Pie Tax.
How to Record a Business Expense Paid on a Personal Card
There are two accepted methods for recording a business expense paid on a personal card. Both result in the same tax outcome — the expense is deductible from your business income.
Method 1: Reimburse Yourself
Transfer the exact amount from your business account to your personal account to cover the expense. In your books, record it as:
- Expense: £1,200 (laptop) — in your equipment/expense category
- Transfer: £1,200 from business to personal — recorded as a reimbursement (not drawings)
This keeps the expense in your business records and the payment traceable. The reimbursement is not taxable income — it’s simply the business paying you back for a purchase you made on its behalf.
Example: You buy a £480 monitor on your personal Amex for your freelance business. You transfer £480 from your Wise business account to your personal account. In your bookkeeping software, you record the £480 as an equipment expense and the transfer as a reimbursement. Your taxable profit is reduced by £480, saving you £96 at 20% tax or £192 at 40%.
Method 2: Capital Introduced
If you don’t have a business account (or don’t want to transfer the money), record the expense as capital introduced — meaning you’ve invested your personal money into the business. In your books:
- Expense: £1,200 (laptop) — in your equipment/expense category
- Capital introduced: £1,200 — recorded as owner’s funds put into the business
Both methods result in the same tax outcome: the expense is deductible from your business income. The difference is just in how the bookkeeping balances.
As one Reddit commenter advised: “Just have the business account pay your personal account for the laptop and keep the receipt as a business record.”
Another commenter suggested: “You’re fine — it’s all really your money anyway. Either reimburse yourself from the correct account, or account for it on your business accounts as capital added. Either way, do it for the exact amount so it all balances.”
What If the Item Is Partly Personal?
If you use the item for both business and personal purposes (like a laptop or phone), you can only claim the business portion, according to HMRC’s guidance on business expenses.
For example:
- Laptop costs £1,200
- You use it 80% for business, 20% for personal
- Claimable amount: £1,200 × 80% = £960
- Tax saving at 20%: £192
- Tax saving at 40%: £384
Be realistic about the split. If HMRC ever asks, you need to justify the percentage. Keep a note of how you calculated it — for example, “laptop used for client work 4 days/week, personal use 1 day/week = 80% business.”
For items that are exclusively for business use (e.g., specialist equipment, business-only software), you can claim 100% with no apportionment needed.
Capital Allowances vs Direct Expenses for Equipment
For items over £1,000, you may need to claim through capital allowances rather than as a direct expense. According to HMRC’s capital allowances guidance, the rules are:
- Annual Investment Allowance (AIA): You can deduct the full cost of qualifying equipment (computers, machinery, tools, furniture) up to £1 million per year. Most sole traders will never hit this limit.
- Items under £1,000: Can be claimed as a direct expense using the “simplified expenses” rules — no need for capital allowances.
- Items over £1,000: Should be claimed through capital allowances (AIA), which in practice means the full cost is deductible in the year of purchase for most sole traders.
For the Reddit user’s MacBook (£1,200), this means:
- The £1,200 cost qualifies for AIA — the full amount is deductible in the year of purchase
- If the MacBook is used 80% for business, the claimable amount is £960 (£1,200 × 80%)
- This reduces your taxable profit by £960, saving £192 at 20% or £384 at 40%
The payment method (personal Amex vs business account) doesn’t change the capital allowance claim — it only affects how you record it in your books.
Record-Keeping Essentials
Regardless of which card you used, HMRC requires you to keep records of all business income and expenses. For each expense, you need:
- The receipt (or invoice) showing what was purchased, when, and how much
- A note of the business purpose if it’s not obvious from the receipt
- The apportionment calculation if it’s a mixed-use item (e.g., “80% business use based on usage log”)
- The bookkeeping entry (reimbursement or capital introduced)
- Proof of payment — your credit card statement showing the transaction
Keep these for at least 5 years after the 31 January submission deadline — HMRC can ask to see them. For the 2023-24 tax year (deadline 31 January 2025), you need to keep records until at least 31 January 2030.
If you use bookkeeping software (FreeAgent, Account OS, Pie Tax, Coconut), you can photograph receipts and attach them to the transaction — no need to keep paper copies. This also prepares you for Making Tax Digital, which requires digital record-keeping from April 2026 for sole traders with qualifying income over £50,000.
Common Scenarios: Personal Card for Business Expenses
Software subscriptions
You pay for Adobe Creative Cloud at £49.99/month on your personal card. This is a common scenario — many SaaS subscriptions are easier to set up on a personal card. Record it as:
- Monthly expense: £49.99
- Method: Capital introduced (or monthly reimbursement from business account)
- Annual total: £599.88 — saves £120 at 20% tax or £240 at 40%
Home office equipment
You buy a £180 desk and £120 office chair on your personal card. Total: £300. Both are under £1,000, so they can be claimed as direct expenses (no capital allowances needed). If your home office is used exclusively for business, claim 100%. If it’s also used personally, apportion.
Travel expenses
You book a £220 train ticket to meet a client on your personal card. The expense is wholly and exclusively for business, so it’s fully allowable. Record it as capital introduced or reimburse yourself.
Phone bill
Your monthly phone bill is £45. You use your phone 70% for business. Claimable amount: £45 × 70% = £31.50/month, or £378/year. This saves £75.60 at 20% tax or £151.20 at 40%.
What About Limited Companies?
The rules are different for limited companies. A limited company is a separate legal entity, so:
- You must have a separate business bank account
- If you pay for a business expense on a personal card, you submit an expense claim to the company and the company reimburses you
- The company claims the expense as a deduction from its profits
- You cannot use “capital introduced” — that’s a sole trader concept
If you’re a sole trader, none of this applies to you. But if you ever incorporate, you’ll need to change your approach.
The Bottom Line
You haven’t done anything wrong by paying for a business expense on a personal card. HMRC’s test is about the purpose of the expense, not the payment method. Record it properly (reimbursement or capital introduced), keep the receipt, and move on.
The key things to remember:
- The expense must be wholly and exclusively for business (or apportioned if mixed-use)
- Keep the receipt and proof of payment for 5 years
- Record it in your books as either a reimbursement or capital introduced
- Items over £1,000 may need capital allowances (AIA) — but the full cost is usually deductible in year one
- Get a separate business account when you can — not because HMRC requires it, but because it makes your life easier
For a full breakdown of what you can and can’t claim, see our guide to allowable expenses for sole traders. For help organising a year’s worth of receipts in a weekend, see our receipt sorting guide.