Tax Deductions for Self-Employed UK: Complete List 2026
What Are Tax Deductions?
Tax deductions (allowable expenses) reduce your taxable profit, lowering your tax bill.
Formula: Turnover - Allowable Expenses = Taxable Profit
💡 Quick Tip
Thistle's AI scans receipts and auto-categorizes expenses for maximum tax relief.
Top 20 Tax Deductions
- Office rent and utilities
- Home office costs (£6/week or actual)
- Business travel and mileage
- Equipment and tools
- Accountancy fees
- Professional subscriptions
- Business insurance
- Marketing and advertising
- Website and software
- Phone and internet (business %)
- Training and courses
- Bank charges
- Legal fees
- Stationery and printing
- Postage and courier
- Protective clothing
- Stock and materials
- Subcontractor costs
- Bad debts
- Pension contributions
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What tax deductions can I claim as self-employed?
You can claim any expense that is "wholly and exclusively" for business purposes, including office costs, travel, equipment, professional fees, and marketing.
Can I claim home office expenses?
Yes, either use the simplified £6/week flat rate or claim actual costs based on the percentage of your home used for business.
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