Side Hustle Tax 2026/27 — Trading Income & Expenses

HMRC does not use the phrase "side hustle" — it asks whether your activity counts as trading, and if it does, the normal self-employment rules apply. The £1,000 trading allowance means that if total gross trading income is £1,000 or less in 2026/27, you generally do not need to tell HMRC, subject to exceptions. If gross trading income is over £1,000, you normally register for Self Assessment by 5 October following the tax year and choose between the £1,000 allowance and actual allowable expenses. See your own figures with the Side Hustle Tax Calculator→.

This guide covers the allowance, registration, the expenses you can claim, the badges of trade test, and how platforms report your earnings to HMRC.

The £1,000 Trading Allowance

If gross trading income is over £1,000, the allowance can be claimed instead of itemised expenses. You cannot use both for the same trade. With £3,000 of income and £400 of expenses, the allowance gives a £2,000 profit while actual expenses give £2,600, so the allowance wins. With £1,800 of expenses, actual costs give £1,200 against the allowance’s £2,000, so itemise instead. The aim is to use the permitted method that produces the lower taxable profit.

Registering and the Return

If your gross income exceeds £1,000, register as self-employed on GOV.UK by 5 October following the tax year and file online by 31 January when required. For 2026/27, Class 4 National Insurance is 6% on profits from £12,570 to £50,270 and 2% above £50,270; profits below £12,570 do not attract Class 4. Class 2 is treated as paid for many people between the small-profits and lower-profits thresholds, while voluntary payment rules apply below the small-profits threshold. A £2,000 taxable profit therefore does not by itself create Class 4 liability.

Allowable Expenses

Mixed-use assets are apportioned — a laptop used half for your day job and half for the side hustle may support a claim for the business proportion. Commuting to a regular workplace is not deductible as business travel. Keep a mileage log with dates, destinations and purposes, and store records for at least five years after the filing deadline.

Badges of Trade — Hobby or Business?

HMRC applies the badges of trade test to decide what is a hobby (no tax, no expenses) and what is a trade. Selling a few old toys on eBay for £200 is clearly a hobby; buying vintage furniture, restoring it and selling weekly is a business even if you call it a hobby. Frequency, organisation and profit motive are the decisive factors.

Platform Reporting and Real Examples

Since 1 January 2024, UK digital-platform reporting rules may require platform operators to collect seller details and report income to HMRC. For sales of goods, the guidance has an exclusion for sellers with fewer than 30 sales and less than €2,000 of consideration; the reporting threshold is not a tax threshold. Receiving a platform report does not automatically mean that tax is due, and it does not remove the obligation to assess whether income is taxable.

Etsy: Sarah sells handmade candles, grossing £3,000 with £550 of expenses. The trading allowance gives a £2,000 profit (better than £2,450 from actual costs), so she chooses the allowance. The example does not determine her final tax or National Insurance without her other income; £2,000 alone is below the 2026/27 Class 4 lower profits limit.

Uber: Priya earns £9,000 driving 15 hours a week. She claims 4,000 business miles at 45p (£1,800) plus £200 of other costs, leaving £7,000 of profit, which is taxed at her marginal rate alongside her part-time job.

Paid content: Jake earns £15,000 from fitness content with £1,700 of qualifying expenses — camera, lighting, editing software and hosting — leaving £13,300 before considering any other tax adjustments. A personal gym membership is not automatically allowable simply because content is filmed around exercise.

Record Keeping

A separate business bank account makes all of this dramatically easier and signals good organisation if HMRC ever reviews. The retention period is at least five years after the 31 January filing deadline.

Coding Out, Payments on Account and the Threshold in Practice

When you have both employment income and side-hustle profits, HMRC may sometimes collect a Self Assessment bill through your PAYE tax code if the coding-out conditions are met. This is not automatic: it depends on the amount owed, PAYE income and other HMRC conditions. Check any adjusted code against your statement and return requirements.

Payments on account are a separate Self Assessment mechanism. They may apply when the relevant previous-year liability exceeds £1,000 and less than 80% of the relevant tax was collected outside Self Assessment; they are not triggered by a fixed £3,000 profit level. The trading-allowance registration test is based on gross trading income, not profit, so a low-margin reselling business can require registration while making little profit.

Combine activities before choosing the treatment

The trading allowance and registration test should be reviewed across the person's trading activities, not platform by platform. Add gross receipts from online sales, freelance work, tutoring, delivery work and other trading activity before comparing the total with £1,000. Then decide whether the activities are one trade or separate trades for the records and expense analysis. A platform dashboard may show only one stream and therefore cannot establish the full tax position.

Keep turnover, expenses and payment dates separate even when the activities are reported on one return. This makes it possible to identify a loss-making activity, an asset sale that is not trading income, or a payment that belongs to a different tax year. Do not use the £1,000 allowance as a substitute for checking whether the receipt is a gift, a hobby disposal, employment income, property income or a trade. The classification controls the tax route.

Platform reporting creates another evidence point. Save the annual platform statement, fees, refunds, returned goods and the bank receipts, then reconcile them to the gross trading income rather than declaring only the amount paid into the bank. A platform's report to HMRC is not necessarily the same as taxable profit. If a platform reports a personal sale that is not a trade, keep evidence explaining why; if it reports a genuine trade, do not assume the report replaces the Self Assessment obligation.

Before the first return, record the registration date, accounting records, allowable-expense method, payment-on-account estimate and any VAT monitoring. Review the position when turnover grows, a hobby becomes organised selling, or the side activity starts using employees or subcontractors. A calculator can show arithmetic, but the official classification and filing duties still need to be checked against the facts.

Frequently Asked Questions

Evidence and decision checks

A reliable side hustle tax 2026 27 review starts by fixing the tax year and the date on which the relevant event happened. Record the person's or business's status, the income or transaction category, the amount before tax, tax already withheld, and any election or claim being relied on. Do not combine a headline figure with a final liability: the result can change when another income source, a payment date, an ownership interest or a qualifying condition is added.

Keep the source documents behind every important input. Depending on the subject, that may include payslips, invoices, bank statements, contracts, provider statements, travel records, HMRC notices, payroll submissions, valuations or correspondence. Where an amount is apportioned, write down the method and retain the underlying total. If a correction is made, preserve the original figure and explain the reason, date and evidence for the replacement.

Before relying on the result, check the current official guidance for the same tax year and jurisdiction. Distinguish enacted law from a consultation, draft measure, announcement or future proposal, and record the effective date. Reconcile the final estimate to the relevant return, payroll record or HMRC account. A calculator or explanatory guide can support a decision, but it cannot replace the eligibility test or the official filing and payment process.

Evidence and decision checks

A reliable side hustle tax 2026 27 review starts by fixing the tax year and the date on which the relevant event happened. Record the person's or business's status, the income or transaction category, the amount before tax, tax already withheld, and any election or claim being relied on. Do not combine a headline figure with a final liability: the result can change when another income source, a payment date, an ownership interest or a qualifying condition is added.

Keep the source documents behind every important input. Depending on the subject, that may include payslips, invoices, bank statements, contracts, provider statements, travel records, HMRC notices, payroll submissions, valuations or correspondence. Where an amount is apportioned, write down the method and retain the underlying total. If a correction is made, preserve the original figure and explain the reason, date and evidence for the replacement.

Before relying on the result, check the current official guidance for the same tax year and jurisdiction. Distinguish enacted law from a consultation, draft measure, announcement or future proposal, and record the effective date. Reconcile the final estimate to the relevant return, payroll record or HMRC account. A calculator or explanatory guide can support a decision, but it cannot replace the eligibility test or the official filing and payment process.

Calculate your exact position with the Side Hustle Tax Calculator→, then read the Trading Allowance guide for the deduction rules and the Self Assessment Filing Guide before registering.

Official sources

• GOV.UK — Tax-free allowances on property and trading income
• GOV.UK — Self-employed National Insurance rates
• GOV.UK — National Insurance rates and allowances 2026 to 2027
• GOV.UK — Selling goods or services on a digital platform
• GOV.UK — Register for VAT
• GOV.UK — How long to keep your records
• GOV.UK — Simplified expenses: vehicles