Key takeaway:
Knowing what you can and cannot claim as an allowable expense can significantly reduce your tax bill and keep your accounts clean.
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Running a small business in the UK means every penny counts. One of the easiest ways to legally reduce your tax bill is by claiming allowable business expenses, but many business owners either miss out or claim incorrectly.
What counts as an allowable expense?
HMRC allows you to deduct costs that are “wholly and exclusively” for business use. Common examples include:
- Office supplies and stationery
- Software subscriptions
- Business travel and mileage
- Staff wages
- Professional fees (accountants, solicitors)
- Marketing and advertising
- Phone and internet used for business
Mixed use expenses
Some costs are partly personal and partly business. You can still claim the business portion, such as:
- Home office use
- Mobile phone bills
- Vehicle expenses
Expenses you cannot claim
These often catch people out:
- Client entertainment
- Personal clothing
- Fines or penalties
- Personal travel
Why accurate record‑keeping matters
Keeping receipts, invoices, and bank statements ensures your accounts are compliant and stress‑free during HMRC reviews.
Final thought
If you are unsure whether something is allowable, speak to a qualified accountant. Claiming correctly can save you hundreds, sometimes thousands each year.