Side Hustle Tax Calculator
Selling, freelancing, content creation or any other side income? See whether you owe tax, how much, and whether you need to register for Self Assessment — using the £1,000 tax-free trading allowance and your marginal tax rate.
Estimate only. This is an estimate for information only, not tax advice. Get a precise figure from HMRC's own tools or an accountant before filing.
Enter your side income
Your taxable profit, estimated tax and take-home from your side hustle appear here as you type.
How side-hustle income is actually taxed
The first £1,000 of gross income from things like selling, freelancing, content creation or casual gig work each tax year is completely tax-free under the trading allowance, and you don't need to report it. Above £1,000, you're taxed on your profit — income minus whichever is bigger, the £1,000 allowance or your actual allowable expenses (never both at once). That profit is added on top of any other income you have, like a main job salary, and taxed at whatever rate that combined income reaches — so a side hustle can easily push some of your profit into a higher tax band if your main income is already close to a threshold. On top of Income Tax, self-employment profit above £12,570 also attracts Class 4 National Insurance at 6% (2% above £50,270), calculated on the profit alone regardless of any NI you already pay through a main job.