The mistakes that cost the most
- Underclaiming. Missing allowable costs such as use of home, mileage or software means paying more tax than you need to.
- Claiming private costs. Putting personal spending through the business, or the private share of a mixed cost, invites questions.
- Guessing with round numbers. Neat, evidence free figures are exactly what triggers a closer look.
- Claiming blocked items. Client entertaining and fines are never allowable, however business related.
- No receipts. Without evidence, HMRC can disallow the cost, so keep or photograph every one.
Confident your expenses are right?
The sweet spot is claiming everything you are entitled to, and nothing you are not. TaxTune finds the costs you missed, keeps the claim clean, and makes sure it stands up.
Let us get your expenses right
We claim every allowable cost, split mixed ones correctly, and keep the whole thing defensible. Fixed fee.
Frequently asked questions
What is the most common expense claim mistake?
Two opposite ones: underclaiming allowable costs, which means overpaying tax, and claiming private or blocked costs, which invites HMRC questions. The fix is claiming the right costs with evidence.
What expenses do people forget to claim?
Use of home, business mileage, software, professional subscriptions and a share of phone and internet are all routinely missed, especially by people filing alone.
Can I claim private costs through the business?
No. Only business costs are allowable, and mixed costs must be split so you claim only the business share. Claiming private spending risks penalties.
Why are round numbers a problem?
Neat, evidence free figures suggest estimates rather than records, which is exactly what prompts HMRC to look more closely. Claim what you can actually prove.
Do I need a receipt for every expense?
Keeping evidence for your claims is essential. Without it HMRC can disallow the cost, so photograph or file every receipt and keep them for at least 5 years.