For eBay, Vinted, Etsy, Amazon and other side hustles, with or without a job. Nothing you enter leaves your browser.
Only count things you bought or made to sell. Selling your own unwanted possessions isn't taxed. Not sure? Check here.
You pay tax on your profit: money in minus your costs. Each year you can deduct either your real costs or the £1,000 trading allowance, whichever is bigger. The calculator picks the better one for you. From 6 April 2027 the allowance is due to rise to £3,000.
Your profit is added to any other income, like a salary. In England, Wales and Northern Ireland everyone gets a £12,570 personal allowance, then pays 20% up to £50,270, 40% up to £125,140 and 45% above. Scotland has six bands from 19% to 48%. The personal allowance shrinks by £1 for every £2 of income over £100,000.
Self-employed people pay Class 4 National Insurance of 6% on profits between £12,570 and £50,270, and 2% above. It's worked out on your selling profit alone, so with a typical side hustle you often pay none, even if you have a job. If profits are under £7,105 you can choose to pay voluntary Class 2 contributions (£3.65 a week) to protect your State Pension record.
If your Self Assessment bill is over £1,000 and less than 80% of your total tax was taken through PAYE, HMRC also asks for half of next year's estimated bill in advance, on 31 January and 31 July. That's why first-year bills can be a shock: you may owe the full bill plus 50% in your first January.
Student loan repayments, savings and dividend income, Marriage Allowance, pension contributions, losses carried forward and Making Tax Digital costs. It's an estimate, not tax advice.