Trading Allowance or Expenses? The £1,000 Breakeven Point

Should you claim the trading allowance or your actual expenses? The trading allowance swaps your real costs for a flat £1,000 deduction, and HMRC does not let you have both. So the crossover is exact: if your allowable expenses for the year come to less than £1,000, the allowance leaves you with a lower taxable profit. Above £1,000, taking it throws away deductions you have already paid for.

That crossover is the whole decision, and it is the part gov.uk does not walk you through. This guide does the maths in both directions, then covers the timeline a side hustle follows from first sale to first tax return.

What the trading allowance is, in plain terms

The trading allowance is a tax exemption of up to £1,000 a year on trading income. HMRC's guidance on tax-free allowances on property and trading income applies it to self-employment, casual services such as babysitting or gardening, and hiring out personal equipment such as power tools.

It works in one of two ways depending on what you earned.

Full relief. Gross trading income of £1,000 or less for the tax year is covered outright. There is nothing to report and no return to file for that income.

Partial relief. Above £1,000, you elect on your Self Assessment return to deduct the allowance instead of your costs. HMRC's wording is that you "can deduct up to £1,000, but not more than the amount of your income", and that you "cannot deduct any other expenses or allowances if you claim the allowances".

The exclusion is stricter than most people assume. HMRC's Business Income Manual at BIM86050 puts it plainly: an individual claiming the trading allowance is "not allowed to deduct any allowable expenditure from their profits for the same period, including any capital allowances". Your laptop, your camera, your van are all inside the £1,000, not alongside it.

Some income is shut out entirely. The allowance does not cover trading income from a partnership, and HMRC bars it against income from a company you control, a partnership you are a partner in, or your own employer.

Trading allowance or actual expenses: where the breakeven sits

Both methods start from the same gross income and subtract something. The allowance subtracts a flat £1,000. The expenses method subtracts what you spent. Whichever subtracts more wins.

Take a side business with £5,000 of gross income in the 2026/27 tax year and vary only the expenses:

The £5,000 in that table is arbitrary, and that is the useful part. Change it to £2,500 or £40,000 and every row still points the same way, because the gross income cancels out of both sides of the comparison. The breakeven sits at £1,000 of expenses regardless of how much you earned.

So the question "am I earning enough to bother with expenses?" is the wrong one. The question is whether your costs for the year clear £1,000, and a business turning over £3,000 can clear it while one turning over £30,000 does not.

Two practical consequences follow. HMRC lets you choose each year which method to use, so a year with a big equipment purchase can go one way and the next year the other. And the choice covers your whole position rather than one trade at a time: HMRC's side hustle campaign confirms you get "a single £1,000 tax-free allowance (for each tax year) and anything you earn from different types of side hustles all counts towards this".

Two worked examples, one on each side of the £1,000 line

Sam sells prints on Etsy. Gross income for 2026/27 is £3,200. His costs are £290 in Etsy seller fees, £110 in packaging and postage, and £240 in paper and ink, so £640 in total.

• Claiming expenses: £3,200 less £640 leaves £2,560 of taxable profit.
• Claiming the allowance: £3,200 less £1,000 leaves £2,200.

The allowance is £360 of taxable profit better. Sam already uses his £12,570 personal allowance against a day job, so that £360 would have been taxed at the 20% basic rate. He keeps £72 he would otherwise have paid, and he does not have to itemise anything.

Priya does weekend garden work. Gross income for 2026/27 is £6,400. She drives 2,600 business miles, disposes of green waste at £180 for the year, spends £430 on tools and consumables, and pays £120 for public liability insurance.

HMRC's simplified mileage rate rose to 55p per mile for the first 10,000 miles from 6 April 2026, up from 45p. Her mileage is worth 2,600 × £0.55 = £1,430. Add the other three items and her expenses reach £2,160.

• Claiming expenses: £6,400 less £2,160 leaves £4,240 of taxable profit.
• Claiming the allowance: £6,400 less £1,000 leaves £5,400.

Taking the allowance would hand HMRC £1,160 of extra taxable profit, £232 in tax at the basic rate. Priya's mileage alone put her past the line, and she would not have known that without a mileage log.

What tips you over £1,000 faster than you expect

The reason people default to the allowance is that they picture their expenses as a handful of small receipts. Three costs land much closer to £1,000 than that picture suggests.

Mileage. At 55p a mile, 1,819 business miles is worth £1,000.45. That is roughly 35 miles a week. A gardener, a photographer, a mobile hairdresser or a market trader passes it without noticing. Our guide to HMRC mileage allowance rates covers how to log journeys so the claim survives a check.

Equipment. Capital allowances sit inside the £1,000 rather than outside it, per BIM86050. One camera body, one laptop, one set of trade tools can absorb the entire allowance by itself.

Working from home. HMRC's simplified expenses flat rate is £10 a month for 25 to 50 hours of home working, £18 for 51 to 100 hours, and £26 for 101 hours or more. At the top band that is £312 a year, a third of the allowance from a figure you claim without a single receipt.

Stack two of those at the levels above and you are past £1,000, which means the trading allowance is costing you money. The full picture of what you can deduct is in our guide to self-employed expenses.

The side-hustle timeline: first sale to first tax return

The £1,000 figure does two separate jobs, and conflating them is where side hustles get caught out. It is the size of the allowance, and it is also the point at which HMRC wants to hear from you.

While gross income stays at £1,000 or under. Full relief applies, there is nothing to report, and no registration is triggered. Note that this is measured on gross income, before you take a penny off for costs.

When gross income passes £1,000. HMRC's guidance is direct: "If your gross income for a tax year is more than £1,000, you must register for Self Assessment by 5 October in the following tax year." The sole trader guidance says the same thing, and you can register earlier by choice.

The dates for the tax year that just ended. Trading income above £1,000 between 6 April 2025 and 5 April 2026 means telling HMRC by 5 October 2026. Miss it and HMRC says you "could get a penalty". The paper return is then due by 31 October 2026, the online return and the tax payment by 31 January 2027. Our walkthrough of registering as a sole trader covers what the process asks for.

One announced change, no start date. On 11 March 2025 the government announced that the Self Assessment reporting threshold for trading income will rise from £1,000 to £3,000 gross "within this parliament". No commencement date has been published, and the £1,000 trading allowance itself is untouched by that announcement. For the 2025/26 and 2026/27 tax years, £1,000 is the number that governs both the allowance and the reporting trigger.

What to keep before HMRC asks for it

Here is the trap in the timeline. You choose between the allowance and expenses at the point of filing, which is up to 22 months after the tax year began. By then the decision is already made for you: if you kept no records, the only method you can evidence is the allowance, whether or not it is the cheaper one.

Priya could not have reconstructed 2,600 miles of gardening journeys in January from memory. Neither can you reconstruct a year of till receipts on thermal paper, which fades well inside HMRC's five-year retention period running from the 31 January submission deadline.

Three things are worth capturing from your first month of trading, before any obligation kicks in:

1. A running total of gross income. Without it you cannot tell which side of £1,000 you finished on, and that determines whether you register at all.
2. Every receipt, including the ones for capital items. A £700 laptop plus £400 of consumables is £1,100 of deductions, and it is the difference between the two methods.
3. A mileage log with date, destination and purpose. Mileage is usually the largest single line and the hardest to rebuild after the fact.

This is the workflow SparkReceipt was built for. Photograph a receipt and the AI pulls out the vendor, date, total and VAT, so the record exists before the paper fades. Connect Gmail or Outlook and receipts arriving by email get captured without forwarding. At year end, the expense tracker gives you one categorised total to compare against £1,000, and the report to back it up if HMRC asks. Our guide to HMRC record-keeping requirements sets out what the rules demand and for how long.

Frequently asked questions

Do I need to tell HMRC about a side hustle under £1,000?

No. Gross trading income of £1,000 or less for the tax year qualifies for full relief under HMRC's trading income guidance, so there is no reporting requirement and nothing to enter on a return. Keep a record of the total anyway, because you need it to prove you stayed under.

Does the £1,000 apply to each side hustle separately?

No. HMRC's side hustle campaign page states you have "a single £1,000 tax-free allowance (for each tax year) and anything you earn from different types of side hustles all counts towards this". Dog walking plus reselling plus tutoring is one combined figure.

Can I claim the trading allowance and expenses in the same year?

No. BIM86050 is explicit that claiming the allowance blocks deducting "any allowable expenditure from their profits for the same period, including any capital allowances". You pick one method for the year, then you are free to pick the other next year.

What if my expenses are higher than my income?

Then the allowance is the wrong tool. HMRC caps the deduction at "not more than the amount of your income", so it cannot produce a loss, and BIM86000 notes that use of the allowance "may not suit an individual's circumstances for example if a trade is loss making".

Does the choice affect my National Insurance?

It can, because both self-employed thresholds are tested against your profits, and the two methods produce different profit figures. For 2026/27, Class 4 contributions start on profits over £12,570, and at profits of £7,105 or more Class 2 contributions are treated as paid, which protects your National Insurance record for the year. If your profit lands near either figure, work out both methods before choosing. Our guide to self-employed National Insurance has the detail.

Key takeaways

• The breakeven is £1,000 of allowable expenses, and it does not move with your income. Below that figure the allowance wins, above it you are paying tax on deductions you already funded.
• Capital allowances count inside the £1,000, not on top of it. One significant equipment purchase can settle the decision on its own.
• 1,819 business miles at the 55p rate that applies from 6 April 2026 is worth £1,000.45, so mileage alone often decides it.
• Gross income above £1,000 in a tax year means registering for Self Assessment by 5 October in the following tax year. For 2025/26 income, that deadline is 5 October 2026.
• The government has announced a rise in the reporting threshold to £3,000 gross "within this parliament" with no start date published. The £1,000 allowance is unchanged.
• You choose the method at filing time, but the records that let you choose have to exist from the first month of trading.

Get Started with SparkReceipt and capture every receipt and mile as you go, so the £1,000 comparison is a number you already have rather than a January guess.