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Tax for side hustle — start here

Side-hustle tax is governed by one threshold (£1,000) and one regime (OECD platform reporting from January 2024).

If your side income is below £1,000 gross in a tax year, the trading allowance covers it and you do not need to tell HMRC. Above £1,000 you must notify HMRC by 5 October after the tax year end, file Self Assessment, and pay tax + NI on the profit. The 'hobby vs trade' question is the threshold test — and from 1 January 2024 platforms like eBay, Vinted, Etsy, Uber, and Airbnb report user data direct to HMRC under the OECD reporting rules.

Key facts

Trading allowance: first £1,000 of gross self-employed income is tax-free + no need to report. (as of 2025-04-06)
Property allowance: parallel £1,000 for property income (e.g. driveway parking, short-let rooms above rent-a-room scope). (as of 2025-04-06)
OECD digital-platform reporting: marketplaces report seller data to HMRC from 1 Jan 2024 (first reports Jan 2025). (as of 2024-01-01)
High Income Child Benefit Charge taper now £60k–£80k from 6 April 2024 (was £50k–£60k). (as of 2024-04-06)
Side-hustle profit + main-job earnings combine for tax band purposes — a £4,000 side hustle on top of £45,000 PAYE income partly pushes into higher rate. (as of 2025-04-06)

What most people in your position get wrong

Confusing gross income with profit when deciding if the £1,000 trading allowance applies.
The allowance covers gross income (turnover) up to £1,000 — it's a notification-and-tax exemption. Above £1,000 gross you must notify even if profit is small or zero.
Typical cost: Failure-to-notify penalty + interest on under-declared tax.
Assuming personal eBay / Vinted clear-outs are always tax-free.
Selling personal possessions you owned for personal use is generally not trading. Buying-to-resell, importing, manufacturing, regular flipping of items you didn't buy for personal use = trading and the £1,000 allowance is the threshold.
Typical cost: HMRC marketplace-data-matching exposure; back-years of under-declared tax recoverable 4 years (careless) / 20 years (deliberate).
Forgetting that side-hustle profit moves PAYE income into higher tax bands.
Total taxable income (PAYE + side hustle profit) drives band allocation. A £45k PAYE earner with £4k side hustle pays 40% on the top slice, not 20%.
Typical cost: Marginal-rate surprise: extra 20p in the £ on the slice above £50,270.
Crossing HICBC ($60k–$80k taper) and not knowing.
Adjusted Net Income above £60k starts clawback of Child Benefit; full clawback by £80k. Counts your full PAYE + side hustle profit + dividends + interest minus pension contributions and Gift Aid.
Typical cost: Up to full Child Benefit clawback; on 2 children = £2,212.60/year for 2024/25.

Who this is for

You have a main income source (employment, pension, or other) and a smaller self-employed or sales activity on the side. Includes online sellers, weekend freelancers, content creators, gig-economy drivers, casual landlords below rent-a-room.

Who this is NOT for

Full-time self-employment — see /start-here/sole-trader. Pure investment income (dividends, savings interest) without trading — see /start-here/employee-extra-income. Lettings inside your main home below £7,500 — covered by rent-a-room, not trading allowance.

Start with these guides

Trading allowance £1,000 →

The threshold that decides whether you need to file at all.

Hobby vs trade — framework test →

Badges of trade applied to side activity.

Marketplace reporting reform (OECD) →

What platforms tell HMRC about you from Jan 2024.

eBay / Vinted — personal vs trading →

Specific guidance for the most-misunderstood case.

HICBC — High Income Child Benefit Charge →

When extra income triggers clawback.

Property allowance £1,000 →

Parallel allowance for casual property income.

Online income hub →

Cluster guide for creators, sellers, gig drivers.

Useful calculators

Income Tax calculator →

Combine PAYE income with side hustle profit to see true marginal rate.

Go deeper

In plain English

The single line that decides everything is £1,000 of gross side income. Below it: you owe nothing and don't need to tell HMRC. Above it: you register, file Self Assessment, pay Income Tax + NI on profit. HMRC now sees the platform data directly, so 'they'll never know' has stopped being true.

Statute reference

Income Tax (Trading and Other Income) Act 2005 ss.783A–783AR (trading + property allowances); International Tax Compliance (Amendment) Regulations 2023 (OECD platform reporting); ITTOIA 2005 Part 2 (trading income); Taxes Management Act 1970 s.7 (notification).

Worked example

PAYE employee on £45,000 salary, Etsy side hustle 2025/26: gross sales £4,800, allowable costs £1,200.

PAYE income: £45,000
Etsy gross sales: £4,800
Allowable expenses: £1,200
Trading allowance option: £1,000 (worse than expenses here)
Side hustle taxable profit: £3,600

Calculation: PAYE tax already withheld at source. Side hustle £3,600: £5,270 of remaining basic-rate band left (50,270 − 45,000), so all £3,600 falls within basic rate. Tax: £3,600 × 20% = £720. Class 4 NI: (£45,000 + £3,600 − £12,570) × 6% on the slice not already covered by PAYE... actually Class 4 only applies to self-employed profit > £12,570 per person threshold, so £3,600 × 6% = £216 if treated standalone.

Outcome: Additional tax + NI on the side hustle: ~£936. Filing required by 31 Jan 2027; register by 5 Oct 2026. Etsy reports the £4,800 to HMRC under OECD platform-reporting rules — discrepancy would trigger compliance attention.

Last reviewed: 2026-05-24. Statute references are for orientation, not advice. Always confirm specifics for your situation against current HMRC guidance or a regulated professional.