UK Side Hustle Tax Guide: Do You Need to Pay Tax on Extra Income?
When side income becomes taxable, how much you will owe, what you can claim, and how to stay compliant without an accountant. Written for eBay and Etsy sellers, evening and weekend freelancers, gig economy drivers, content creators and people renting out a room or driveway. It covers the tax-free allowances, the rules by type of side hustle, how the tax is calculated on top of a day job, claimable expenses, six steps to get started, and the deadlines. It states it is general information and that thresholds should be verified with HMRC.
Do I need to pay tax on my side hustle?
The short answer is that once you earn more than the trading allowance in a tax year from your side hustle, you probably need to tell HMRC and may owe tax. The page gives a three-way decision tree.
Below the trading allowance there is nothing to do: no registration, no filing, no payment. Between the trading allowance and the Personal Allowance you must register for Self Assessment, and whether tax is due depends on whether your main job has already used up your Personal Allowance. Above the trading allowance with a day job, your Personal Allowance is usually already used, so side hustle profit is taxed at your marginal rate plus National Insurance.
The page also warns that HMRC already has the data. Since January 2024 digital platforms including eBay, Etsy, Airbnb, Uber, Deliveroo and Fiverr must report UK sellers' income to HMRC once it passes a reporting threshold in value or transaction count, and HMRC cross-references that against tax returns. Failing to declare income you should have declared can attract penalties up to the full amount of the tax owed.
Tax-free allowances for side income
The trading allowance covers self-employed income up to a set annual amount, automatically and with no registration required. Below it there is nothing to report.
The Personal Allowance covers your total income across all sources before Income Tax applies, so if your salary has already absorbed it, side hustle income above the trading allowance is taxable from the first pound.
The property allowance works like the trading allowance but for property income, covering things like renting out a room, a driveway or storage space, and it is separate from Rent a Room Relief. Rent a Room Relief covers a larger amount of income from letting a furnished room in your own home, and you cannot claim it and the property allowance on the same income.
Tax rules by type of side hustle
Freelancing and consulting, covering web design, copywriting, tutoring, coaching and photography, is self-employment income: register as a sole trader once you pass the trading allowance and declare on Self Assessment, and monitor turnover against the VAT registration threshold.
Selling goods online through Etsy, eBay, Amazon, Depop or Vinted is trading income if you buy to resell or make goods to sell; selling your own personal possessions generally is not. Gig economy work through Uber, Deliveroo, TaskRabbit or Fiverr is self-employment, not employment, so the platform deducts no tax and your gross earnings before platform fees are your turnover.
Content creation on YouTube, TikTok, podcasts, blogs and affiliate schemes counts ad revenue, sponsorships, affiliate commissions and gifted products above a small value as income, with gifted items valued at market value. Renting out assets is property income for rooms, parking and storage and trading income for hiring out a car or equipment, with residential rental generally VAT-exempt. Investments and crypto are not self-employment: dividends have their own allowance and capital gains their own annual exempt amount, and both are reported on Self Assessment if above the thresholds.
How much tax will I pay?
Side hustle profit is added on top of employment income, and the rate depends on which band the extra income falls into. Most people with a day job pay the basic rate on side income, while those whose total income crosses into the higher rate band pay the higher rate on the portion above it, and the additional rate applies at the top.
On National Insurance, mandatory Class 2 was abolished from 6 April 2024. You pay Class 4 on self-employment profits between the lower and upper profits limits, at a reduced rate above the upper limit, and you can pay voluntary Class 2 if your profits are below the Small Profits Threshold to protect your State Pension record.
The page notes you can sign in to use the income tax estimator inside Taxmo to calculate your liability from your employment income and side hustle profit, and that the Free plan includes basic VAT and income tax calculators.
Expenses you can claim
If you claim actual expenses instead of the trading allowance, the common deductions are equipment and tools such as a laptop, camera, software or craft supplies, claimed in the business proportion where they are also used personally; home office costs using HMRC's simplified flat rate by monthly hours; and business travel, which excludes commuting to a regular workplace, using HMRC's approved mileage rates if driving.
Also claimable: the business percentage of phone and internet; marketing and advertising including hosting, domains, ads and business cards; professional services such as accountancy, legal costs, insurance and tax software; training that updates skills you already use, but not training for an entirely new trade; and platform and transaction fees from Etsy, PayPal or Stripe, which are a cost of sale.
You use either the trading allowance or actual expenses, never both. If your deductible expenses come to less than the trading allowance, the allowance gives the bigger deduction with no paperwork. If they exceed it, claim the expenses instead.
Six steps to stay compliant, and the deadlines
Track income from day one, keeping invoices, platform payment confirmations and bank statements. Decide between the trading allowance and actual expenses by comparing the two. Register for Self Assessment by 5 October following the end of the tax year in which you started, and keep the Unique Taxpayer Reference you receive.
Keep records through the year, since HMRC requires them for several years after filing, and the page suggests logging transactions weekly using software such as Taxmo. Set aside a portion of each payment for tax and National Insurance in a separate savings account so January is not a shock. File your Self Assessment by 31 January, reporting side hustle income and expenses on the self-employment pages (SA103), and pay by the same date.
The dates to hold: 5 October to register in your first year, 5 April for the end of the tax year, 31 January for online filing and payment, 31 July for the second payment on account where applicable, and continuous monitoring of rolling twelve-month turnover against the VAT registration threshold. Missing 31 January brings an immediate fixed penalty even if you owe no tax, then daily penalties from three months, further percentage-based penalties at six and twelve months, and interest on unpaid tax from the due date.
Common questions
Do I have to tell HMRC about my side hustle?
If your gross self-employment income exceeds the trading allowance in a tax year, you must register for Self Assessment and file a return. Below that the trading allowance covers it automatically and there is nothing to do. Since January 2024 online platforms such as eBay, Etsy and Airbnb report seller income to HMRC once it passes a reporting threshold, so HMRC often already knows what you earned.
Do I pay tax on side hustle income if I already have a full-time job?
Yes, once your side income exceeds the trading allowance. The profit is added on top of your employment income, and because your Personal Allowance is usually already used up by your salary, it is taxed at your marginal rate. You also pay Class 4 National Insurance on self-employment profits above the lower profits limit. Mandatory Class 2 was abolished from 6 April 2024, though voluntary Class 2 is still available below the Small Profits Threshold to protect your State Pension record.
Does my employer need to know about my side hustle?
HMRC does not tell your employer about side hustle income. Employment and self-employment are reported in separate sections of the same Self Assessment return. That said, check your employment contract, because some employers restrict outside business activities, particularly where they compete with the employer.
What is the difference between the trading allowance and claiming expenses?
You use one or the other, never both. If your deductible expenses come to less than the trading allowance, the allowance gives you a bigger deduction and no paperwork. If your expenses are higher than the allowance, claiming actual expenses reduces your taxable profit more. Work out both figures for the year and use whichever leaves the lower taxable profit.
I sell personal items on eBay, is that taxable?
Selling your own unwanted personal possessions is generally not taxable as trading income. It becomes taxable if you regularly buy items in order to resell them at a profit, which HMRC treats as trading. The test is the badges of trade: how often you sell, whether you intended to profit, and how commercial the activity looks. Platform reporting to HMRC since 2024 does not by itself mean tax is due, it just helps HMRC identify people who may be trading.
How do I actually pay the tax I owe on side income?
Through Self Assessment. File your return by 31 January following the end of the tax year, HMRC calculates what you owe, and you pay by that same 31 January date by bank transfer, direct debit or debit card. If your bill exceeds the payments on account threshold, HMRC will also require two advance payments towards the following year's bill, due 31 January and 31 July.