Side Hustle Tax Calculator UK
Calculate your tax obligations on side hustle income for the 2025/26 tax year. Get accurate calculations based on current HMRC rates and allowances.
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Side Hustle Tax Guide 2025/26
What Counts as a Side Hustle?
A side hustle is any income-generating activity you do alongside your main job. Common examples include:
- Freelance services (writing, design, consulting)
- Online selling (eBay, Etsy, Amazon)
- Ride-sharing or food delivery
- Tutoring or teaching
- Property rental
- Content creation (YouTube, blogging)
Current Tax Rates and Allowances
| Income Band | Tax Rate | Applies To |
|---|---|---|
| Personal Allowance | 0% | Up to £12,570 |
| Basic Rate | 20% | £12,571 – £50,270 |
| Higher Rate | 40% | £50,271 – £125,140 |
| Additional Rate | 45% | Over £125,140 |
National Insurance Contributions
Class 2 NI is payable if your profits exceed £6,515 per year at £3.45 per week. Class 4 NI is charged at 6% on profits between £12,570 and £50,270, and 2% on profits above £50,270.
Allowable Business Expenses
You can deduct legitimate business expenses from your side hustle income before calculating tax:
- Office supplies and equipment
- Travel costs for business purposes
- Professional development and training
- Marketing and advertising costs
- Home office expenses (if working from home)
- Professional fees and subscriptions
When to Register for Self Assessment
You must register for Self Assessment by 5 October following the end of the tax year if:
- Your side hustle profits exceed £1,000 in a tax year
- You have untaxed income over £2,500
- You’re already registered for Self Assessment
Frequently Asked Questions
Do I need to pay tax on my side hustle if I earn less than £1,000?
If your side hustle profits are £1,000 or less per year, you benefit from the trading allowance and don’t need to declare this income or pay tax on it. However, if you have other untaxed income, different rules may apply.
Can I offset business losses against my main employment income?
Generally, trading losses from your side hustle can only be offset against future profits from the same trade, not against your employment income. However, there are specific circumstances where this might be possible – seek professional advice.
When do I need to pay the tax on my side hustle?
Tax on side hustle income is typically paid through Self Assessment. The deadline for submitting your return is 31 January following the end of the tax year, and this is also when payment is due. You may also need to make payments on account.
What records should I keep for my side hustle?
Keep records of all income received, business expenses, bank statements, receipts, and invoices. You must keep these records for at least 5 years after the 31 January submission deadline of the relevant tax year.
Do I need to register for VAT on my side hustle?
You must register for VAT if your taxable turnover exceeds £85,000 in a 12-month period. You can also voluntarily register for VAT if your turnover is below this threshold, which might be beneficial if you have significant business expenses.
References
- HM Revenue and Customs. (2025). Income Tax rates and Personal Allowances: Current rates and allowances. Gov.uk.
- HM Revenue and Customs. (2025). Self Assessment: Check if you need to send a tax return. Gov.uk.
- HM Revenue and Customs. (2025). National Insurance rates and categories. Gov.uk.
- HM Revenue and Customs. (2025). Trading and property allowances. Gov.uk.
- HM Revenue and Customs. (2025). VAT rates and thresholds. Gov.uk.
- HM Revenue and Customs. (2025). Expenses if you’re self-employed. Gov.uk.