TL;DR
UK side hustle income above the GBP 1,000 trading allowance must be declared on Self-Assessment. Online platforms report to HMRC from January 2024. This guide covers when to register, common side hustles, and the tax treatment.
Key facts
- GBP 1,000 trading allowance covers small income without registration.
- Above GBP 1,000: SA registration required by 5 October following the tax year.
- Online platforms report annual earnings to HMRC from January 2024.
- Common side hustles: eBay, Etsy, freelance services, gig economy, content creation.
- Income added to other taxable income for band determination.
- Class 4 NI applies on profits above GBP 12,570.
- Cryptoasset and content creation income is trading or capital depending on facts.
- HMRC's nudge letters have increased from 2024 onwards.
Side hustle income - earnings from a casual business alongside main employment - has become a significant feature of UK personal finance. HMRC estimates around 8.5 million UK adults have side income above hobby level. The tax framework treats most side hustle income as self-employment trading income, with the GBP 1,000 trading allowance providing a small-scale exemption.
This guide covers when side income becomes taxable, the registration threshold, the common side hustle categories, and the HMRC data feeds from online platforms that increase visibility from 2024 onwards.
When side income becomes taxable
Side hustle income is taxable as self-employed trading income under section 5 ITTOIA 2005 where there is commercial activity with profit intent. Hobby selling (decluttering personal items, occasional gifts) is not trading. The badges of trade in HMRC's BIM20205 distinguish: profit motive, frequency of transactions, organisation, purchase for re-sale, value uplift work, knowledge or expertise.
The GBP 1,000 trading allowance covers all sources of trading income combined. Below GBP 1,000 a year of gross trading income, no SA registration is needed. Above GBP 1,000, registration is required by 5 October following the tax year.
Where the side hustle is alongside main employment (most common pattern), the SA return reports the side income as additional self-employed profit. The profit stacks on top of employment income for band determination. A higher-rate employee with a side hustle pays 40% on the side profit (plus Class 4 NI at 6% if total profits exceed GBP 12,570 which they typically would given the employment income).
Worked example: a basic-rate employee with GBP 35,000 salary plus GBP 4,000 of side hustle profit. The side profit is taxed at 20% (still within basic rate after stacking) plus 6% Class 4 NI on the slice of side profit above any unused PA (in this case the PA is fully used by salary, so Class 4 applies to the full GBP 4,000). Side hustle tax: GBP 800 income tax + GBP 240 NI = GBP 1,040.
Common UK side hustles and their treatment
eBay, Vinted, Depop selling: trading income where bought-to-sell or where output significantly exceeds personal use. Casual decluttering of personal items is not trading. Active buying for resale, even on small scale, is trading and counts toward the allowance.
Etsy, Folksy, craft selling: trading income. The craft activity itself is the business; gross sales count toward the allowance and registration threshold.
Gig economy (delivery driving for Deliveroo, Just Eat, Uber Eats; ride-share with Uber, Bolt): trading income. The platforms now report earnings to HMRC under the Information Exchange rules from January 2024. HMRC has direct visibility of platform earnings.
Content creation (YouTube, TikTok, Instagram, OnlyFans, Patreon): trading income where the activity is commercial. Hobby content with no commercial intent is not trading; monetised content with regular income is. Sponsorship deals, ad revenue, subscription income all count toward the trading allowance.
Freelance services (writing, design, translation, tutoring, consulting): trading income. Each engagement counts toward the gross trading income for the year.
HMRC platform reporting from January 2024
Under the OECD Model Reporting Rules for Digital Platforms, implemented in UK law from 1 January 2024, online platforms must report seller income to HMRC annually. Platforms in scope: eBay, Vinted, Depop, Airbnb, Uber, Deliveroo, Just Eat, Etsy, and similar. The first reports cover calendar year 2024, with returns due to HMRC by 31 January 2025.
HMRC uses the platform reports to identify sellers who have not registered for SA despite earnings above the threshold. The reports also support nudge letters where the SA return omits platform-reported income.
The reporting threshold for platform inclusion is broadly: 30 transactions or EUR 2,000 of total payments to a seller in the calendar year. Small-scale casual sellers (a handful of items totalling under EUR 2,000) are typically below the platform reporting threshold and are not reported. Above the threshold, the platform reports the seller's identity, total receipts, and number of transactions.
Practical action: sellers above the reporting threshold should expect HMRC to know about their platform income from 2024 onwards. Registering for SA where income exceeds the trading allowance is the compliance route. Voluntary disclosure of prior-year non-compliance produces lower penalties than HMRC discovery.
Cryptocurrency and content creation specifics
Cryptoasset disposals are typically capital gains rather than trading income for most retail holders. HMRC's Cryptoassets Manual treats personal holdings as chargeable assets under TCGA 1992. Where the activity meets the badges of trade (frequent transactions, professional organisation, profit motive in a commercial sense), it may be treated as trading rather than investment.
NFT creation and sale by an artist is trading income. The NFT is a product being sold; revenue counts toward the trading allowance. Resale of NFTs as an investment is normally CGT, parallel to other cryptoasset disposals.
Content creation (YouTube revenue, sponsorship, Patreon subscriptions) is trading income for the creator. Tax is paid on the net profit after deductible expenses (equipment, software, business proportion of home, payments to collaborators).
Edge case: where content creation involves gifts of high-value products from brands (a fashion influencer receiving designer items in exchange for content), the gifts are treated as taxable income at market value under section 5 ITTOIA 2005. The creator should report the market value of gifts received in connection with the trade.
Hobby income versus trading income
The line between hobby and trade matters for tax. Hobby income is not taxable; trading income is taxable above the GBP 1,000 trading allowance. The badges of trade in HMRC's BIM20205 distinguish: profit motive, frequency of transactions, organisation, purchase for resale, value uplift work, knowledge or expertise.
A hobbyist selling occasional personal possessions (decluttering, gift items not wanted) is not trading. A hobby seller doing the same activity at scale with profit intent is trading. The line is fact-specific and HMRC takes a practical view in most cases.
Examples: selling 5 old electronics on eBay across 2 years (probably hobby), selling 5 new electronics each month (probably trade), giving away surplus garden vegetables (hobby), running a weekly market stall of garden produce (trade), occasional ad hoc paid writing for a friend (probably hobby), regular freelance writing for multiple paying clients (trade).
Practical action: where the activity is clearly small-scale and personal, no action is needed. As it grows or becomes regular, the trading allowance applies up to GBP 1,000 a year. Above GBP 1,000 the SA registration discipline applies regardless of any subjective view of 'hobby' versus 'trade'.
Combining side hustle income with employment
Most side hustle income alongside main employment is taxed at the employee's marginal rate. The Personal Allowance is typically used by salary; side profits stack on top. A basic-rate employee with a GBP 5,000 side hustle pays 20% income tax (GBP 1,000) plus 6% Class 4 NI (GBP 300) on the profit, netting GBP 3,700.
Where the combined income (salary + side profit) crosses a band threshold, the slice above the threshold is taxed at the higher band rate. A GBP 48,000 employee with a GBP 5,000 side hustle has GBP 2,730 of side profit in basic rate and GBP 2,270 in higher rate. The mix of rates makes the side hustle slightly less tax-efficient than at the basic-rate stage alone.
Tax planning options: pension contributions reduce taxable income at marginal rate (a GBP 5,000 gross pension contribution at higher rate saves GBP 2,100 of tax + NI). Gift Aid donations reduce adjusted net income for the Personal Allowance taper at GBP 100,000+.
Practical action: most employees with side hustles do not need professional tax advice for the side income itself - HMRC's SA online service handles standard cases. Where the side hustle is substantial (above GBP 15,000-20,000 of profit) or has unusual features (foreign income, specific reliefs), professional advice typically pays for itself.
Disclaimer
This article provides general information based on rules and figures published by UK government and regulator sources as of May 2026. It is not personal financial, legal, immigration or tax advice. Rules, fees and figures change and individual circumstances vary. Readers should check primary sources or consult a qualified, regulated adviser before acting on any information here.
Frequently asked questions
When do I have to declare my side hustle to HMRC?
Once gross trading income from all sources exceeds GBP 1,000 in a tax year. Below GBP 1,000 the trading allowance applies and no registration is needed. Above GBP 1,000, SA registration is required by 5 October following the tax year. The first SA return is then due by 31 January the following year (so 31 January 2028 for 2026/27 income).
Will HMRC know about my eBay income?
From January 2024 yes for active sellers above the reporting threshold (30 transactions or EUR 2,000 a year). UK platforms in scope include eBay, Vinted, Depop, Airbnb, Etsy, Uber, Deliveroo, Just Eat. Platforms report seller identity, total receipts and transaction count to HMRC annually. HMRC uses the data for nudge letters and compliance checks. Casual sellers below the platform threshold are not reported.
Is selling old clothes on Vinted taxable?
Generally no - decluttering personal items is not trading. Where the activity moves from clearing personal possessions to buying-to-sell or producing items for sale, it becomes trading and counts toward the GBP 1,000 allowance. The distinction is fact-specific; HMRC's badges of trade test (profit motive, frequency, organisation) determines the position.
How are content creators taxed in the UK?
As self-employed trading income on the net profit after deductible expenses. YouTube ad revenue, sponsorship deals, Patreon subscriptions all count toward the trading allowance. Gifts of high-value products from brands in exchange for content are taxable at market value. Equipment (cameras, computers), software, business proportion of home, and payments to collaborators are deductible expenses. Above GBP 1,000 of gross income, SA registration is required.
Do I have to pay NI on my side hustle?
Class 4 NI at 6% applies to combined self-employed profits above GBP 12,570 (the Lower Profits Limit). For a side hustle alongside employment, the Personal Allowance is typically used up by salary, so the full side profit attracts Class 4 NI. The 2% rate applies above GBP 50,270 of combined earnings (salary plus side profit). Class 2 voluntary is available below the Small Profits Threshold but typically not relevant for side hustles alongside employment.