Issues

Selling On eBay, Vinted Or Airbnb? What HMRC's Nudge Letters Really Mean

HMRC sent you a letter about your online sales, and the headlines are alarming. Here's what the new platform-reporting rules actually mean—and why most people who get one of these letters owe nothing at all.

You cleared out your wardrobe on Vinted, sold a few bits on eBay, and now a letter from HMRC has landed on your doormat. The headlines say HMRC is taxing your second-hand sales. They are not.

Take a breath. The new rules that triggered your letter are a reporting duty on the platforms—eBay, Vinted, Airbnb, Etsy, Depop, Uber—not a new tax on you. Selling your own used possessions is not a trade, and it is not taxable. For most people who receive one of these letters, the answer is simple: you owe nothing, and you never will.

This article's main job is to help you work out which group you are in. The large majority of people landing here are casual sellers, hosts letting a spare room, or gig workers earning small amounts—and there is genuinely nothing to declare. A smaller group are running what the law calls a trade, and they have real obligations. We will walk through how to tell the difference, and then, for the minority who do owe tax, what to do and how to challenge HMRC if they get the figures wrong.

Why You Got This Letter

What The New Platform Rules Actually Do

The rules behind your letter are the Platform Operators (Due Diligence and Reporting Requirements) Regulations 2023 (SI 2023/817). They came into force on 1 January 2024 and put the UK in step with an international model agreed through the OECD.

Here is the crucial point. These regulations impose duties on platforms, not on you. They require operators like eBay, Vinted and Airbnb to collect information about their sellers and report it to HMRC once a year. They do not change who owes tax, or how much. The rules about whether your selling is taxable are the same rules that existed before any of this started—and we get to those below.

The first reports covered the 2024 calendar year and were due to HMRC by 31 January 2025. The second batch, covering 2025, was due by 31 January 2026. Under the regulations the platform must also send you a copy of what it reported by the same deadline—so you may have received a statement from the platform itself as well as the letter from HMRC.

You may also have seen a figure mentioned: a platform does not have to report a goods seller who made fewer than 30 sales and under around £1,700 in the year (the limit is set in euros—€2,000—so the pound figure moves with the exchange rate). It is vital to understand what this is. It is a reporting threshold for the platform, not a tax-free allowance for you. Going over 30 sales or £1,700 does not mean you owe tax; staying under it does not mean you are in the clear if you are genuinely trading. It only decides whether the platform has to send HMRC your details.

To get a sense of the scale: the accountancy firm BDO, using a Freedom of Information request, reported that platforms sent HMRC data on nearly 4 million sellers for 2025—up 272% on the 1.47 million reported for 2024—covering around £55 billion of income across 811 platforms. HMRC has said it is still building the systems to analyse all of this and cannot yet issue penalties straight from the data. So a letter is, at this stage, a prompt to check your position—not a bill.

What An HMRC "Nudge Letter" Is—And Isn't

The letter you received is almost certainly what HMRC calls a "one to many" letter, part of its campaign aimed at people with online "side hustles." HMRC sends the same template to large numbers of people whose platform data suggests they might have undeclared income. It usually carries an individual case reference.

If your first worry is whether the letter is even genuine—HMRC-impersonation scams are common—do not phone a number or follow a link printed in the letter itself. Check it against the list of genuine HMRC contacts on GOV.UK first, and only then respond through HMRC's published channels.

A nudge letter is not a formal enquiry, and it is not an assessment or a demand for tax. HMRC has not decided you owe anything. It is asking you to check whether you need to do something and to respond.

The letter typically asks you to reply within around 30 days, and to make any disclosure within around 90 days. It often encloses a "certificate of tax position"—a form inviting you to declare that your tax affairs are in order, or to say what is outstanding.

Two practical points here. First, it is worth responding even if you owe nothing—ignoring the letter is the one thing that tends to make matters worse. Second, on that certificate: the Chartered Institute of Taxation (CIOT) and the Low Incomes Tax Reform Group (LITRG) both caution that the certificate has no statutory basis, that you are not legally required to sign it, and that signing a false declaration carries its own risk. We come back to how to respond, calmly, near the end.

Do You Actually Owe Any Tax?

This is the heart of it. Whether you owe anything depends not on the platform rules but on what you were actually doing. Work through the sections below in order—most readers will find their answer in the first one or two.

Selling Your Own Possessions Is Not Trading

If you were clearing out your own belongings—old clothes, the kids' outgrown toys, a sofa you replaced, books, a phone you upgraded from—you are not trading, and there is generally nothing to declare. It is the online equivalent of a car boot sale.

Strictly, selling something you own is a disposal for Capital Gains Tax (CGT), not income. But that almost never produces a tax bill on everyday belongings, for two reasons. You have usually sold for less than you paid—a loss, not a gain. And even where there is a gain, personal possessions are largely exempt from CGT, as the Selling One Valuable Item section below explains. So a one-off sale of your own things—whether it raises £200 or £2,000—is generally not taxable at all.

The same goes for selling things that were never yours to trade—clearing a late relative's house, or running a child's outgrown toys and clothes through your own account. That is not your trading income either.

The legal question is whether your activity amounts to a trade. There is no single definition in the statute, so the courts use a set of factors known as the badges of trade. They were first drawn together in 1955 and developed in the leading case of Marson v Morton [1986] 1 WLR 1343, where Sir Nicolas Browne-Wilkinson V-C set out nine factors—while stressing that they are not an exhaustive checklist and no single one is decisive. HMRC summarises them in its Business Income Manual at BIM20205.

In plain English, HMRC and the tribunals weigh things like:

Profit motive—did you set out to make a profit, or just get rid of things you no longer needed?
Frequency—was this a one-off clear-out, or a regular, repeated activity?
What the item was—your own used belongings, or stock you acquired to sell on?
How you got it—bought to resell, or inherited, gifted, or simply owned and used?
What you did to it—sold as-is, or repaired, repackaged, branded or marketed to add value?
How you sold it—a casual listing, or a set-up that looks like a business (a shopfront-style account, bulk listings, business name)?
The gap between buying and selling—a quick turnaround to resell points towards trade; long ownership points away.

None of these is a verdict on its own. There is no magic number of sales that turns you into a trader—anyone who tells you "you're fine under 30 sales" or "over X sales you're trading" is wrong. It is the overall picture that matters.

Worked example. You spent the spring listing the contents of your wardrobe on Vinted—about 60 items over three months—and took £900, all for less than you originally paid. That is a lot of sales, but it is a one-off declutter of your own possessions, sold at a loss, with no profit motive and nothing bought to resell. That is not a trade. There is nothing to declare and no tax to pay—even though you went well over the platform's 30-sale reporting threshold.

If you genuinely cannot tell whether what you were doing tips into trading, that is exactly the kind of borderline question worth running past a tax adviser or one of the free services listed at the end.

The £1,000 Trading Allowance

Even if your activity is a small trade, there is a generous buffer. Everyone gets a trading allowance of £1,000 a year. It was introduced by Finance (No.2) Act 2017 and sits in sections 783A onwards of ITTOIA 2005.

If your gross trading income—the total before any costs—is £1,000 or less for the tax year, the income is not taxed and you do not need to tell HMRC or file a return at all. This covers the great majority of casual sellers and small-scale gig earners.

If your gross income is more than £1,000, you have a choice. You can claim the £1,000 allowance instead of deducting your actual expenses—useful if your real costs were under £1,000—or you can deduct your actual expenses in the normal way. You cannot do both. The allowance is a single combined £1,000 across all your casual trades, not £1,000 per platform.

A change is on the horizon, but it is not yet in force. From the 2027/28 tax year, the point at which trading income has to be reported through Self Assessment is due to rise to £3,000. The £1,000 trading allowance itself is not changing—and crucially, this reporting threshold does not exist yet, so do not rely on it for any year up to and including 2026/27.

Renting A Room Or Your Property

If your letter relates to Airbnb or another letting platform, a separate and very generous relief may apply. Rent-a-room relief exempts up to £7,500 a year of income from letting furnished accommodation in your own home—a lodger, or a spare room let out on Airbnb while you still live there. If your gross receipts are at or below £7,500, the income is exempt and you generally have nothing to declare.

This is different from letting out a whole property you do not live in—a holiday let or a buy-to-let. That is property income, rent-a-room does not apply, and it has its own rules. The £1,000 property allowance (also introduced by Finance (No.2) Act 2017) works much like the trading allowance for small amounts of property income.

When A Hobby Becomes A Business

The picture changes when you are not selling your own possessions but buying things specifically to sell on at a profit. Buying job-lots at car boot sales to flip on eBay; sourcing stock from wholesalers to resell on Etsy or Depop; reselling event tickets or trainers for a margin—these point firmly towards trading.

Worked example. Every week you buy clothing in bulk from a wholesaler and resell individual items on eBay, taking around £400 a week. Here the badges line up against you: a clear profit motive, frequent and repeated transactions, goods bought specifically to resell, and a short turnaround. This is a trade. If your gross income is over the £1,000 trading allowance, you have income to declare.

The driver is not the platform or the number of sales—it is the profit motive combined with buying to resell, repeated regularly. That is what separates a side business from a clear-out.

Gig and services work sits on the trading side too. If you drive for Uber, deliver for Deliveroo, or freelance through a platform, that income is trading income from the first pound over the £1,000 allowance. The profit rules are the same, but your costs look different—a driver, for example, can deduct allowable running costs and the platform's commission, or use HMRC's simplified flat-rate mileage instead of working out actual vehicle costs.

Selling One Valuable Item

What if you sold a single high-value item—an antique, a piece of jewellery, a collectable, a painting? That is usually not income at all. It falls under Capital Gains Tax (CGT), and personal possessions get their own exemption.

Under section 262 of TCGA 1992, a gain on a tangible movable item—a "chattel"—is not chargeable to CGT if you sell it for £6,000 or less. Above £6,000 there is marginal relief: the chargeable gain is capped at five-thirds of the amount the proceeds exceed £6,000, and you use the lower of that figure or your actual gain. Note the £6,000 limit applies per item (or per set), not to your total sales for the year—so selling several different things, each for under £6,000, stays within the exemption.

Two further rules mean most everyday possessions escape CGT even without the £6,000 limit. Many are wasting assets—items with a predictable useful life of 50 years or less, such as electronics, furniture and other household goods. Under section 45 of TCGA 1992 a gain on a wasting chattel is exempt whatever you sell it for, and cars are exempt outright (section 263). It is mainly long-lived items—antiques, jewellery, fine art and collectables—that have to rely on the £6,000 chattels limit.

Worked example. You inherited an antique and sold it for £8,000. The proceeds are over the £6,000 chattels limit, so marginal relief applies: the gain is capped at 5/3 × (£8,000 − £6,000) = 5/3 × £2,000 = £3,333. You would use the lower of that and your actual gain. This is a capital gain, not trading income—it has nothing to do with the trading allowance.

Keep two things separate. The £6,000 chattels exemption is its own rule. On top of it, everyone has a CGT annual exempt amount of £3,000 (for 2024/25 onwards), which can cover gains that do fall into charge. Selling one inherited or long-owned valuable item is a world away from running a resale business, and HMRC's nudge letter does not change which one you were doing.

If You Are Trading: What You Must Do

If you have worked through the sections above and concluded you genuinely are trading and your income is over the £1,000 allowance, the rest of this article is for you. If you owe nothing, you can skip to How To Respond To The Letter.

Telling HMRC (The Notification Trap)

If you are trading and not already in Self Assessment, you have a legal duty to tell HMRC. Under section 7 of the Taxes Management Act 1970, anyone liable to tax who is not already filing returns must notify HMRC by 5 October following the end of the tax year in which the liability arose.

This catches people out precisely because they do not know it exists—the same structural trap that snares people on the High Income Child Benefit Charge. If your side selling quietly became a trade, the clock to notify HMRC may already have started without you realising.

Working Out What You Owe

If you are trading, tax is due on your profit, not your sales. You take your total receipts and deduct your allowable costs—the cost of the goods themselves, platform and payment fees, postage and packaging, and refunds you gave.

Worked example. You took £6,000 selling trainers on eBay, having spent £2,800 buying the stock and £600 on fees and postage. Your profit is £6,000 − £3,400 = £2,600—and that is the figure you are taxed on, not the £6,000. (If your costs had instead been under £1,000, you could deduct the £1,000 trading allowance rather than your actual costs.) Whether any tax is then actually due depends on your other income and your personal allowance.

What Happens If You Don't

If you should have notified and did not, HMRC can raise a discovery assessment under section 29 TMA 1970—an assessment of tax it says you owe, raised outside the normal return process. How far back it can reach depends on your behaviour: normally 4 years, 6 years if you were careless, and up to 20 years if the failure was deliberate. For how enquiries and assessments work, see our guide to HMRC enquiries and closure notices.

On top of the tax, HMRC can charge a failure-to-notify penalty under Schedule 41 of the Finance Act 2008. The penalty is a percentage of the "potential lost revenue"—broadly the tax that went unpaid—and the percentage depends on your behaviour: up to 30% if the failure was non-deliberate, rising for deliberate or concealed conduct. The percentage is reduced for the quality of your disclosure, and a prompted disclosure (one made after a nudge letter) attracts a higher floor than an unprompted one. Our guides to HMRC penalties and reducing HMRC penalties cover the behaviour bands and mitigation in detail.

One published HMRC position is worth knowing. For income tax and CGT, HMRC's guidance (CH72700) treats the potential lost revenue as the tax unpaid at the 31 January following the tax year. HMRC's stated position is that paying the tax by that date can remove a failure-to-notify penalty even where the 5 October notification was missed. Whether that helps in your particular case depends on your facts and timing, so check it against your own dates rather than assuming.

Separately, interest runs automatically on tax paid late, from the date it was originally due. Interest is not a penalty and cannot be appealed; if you cannot pay in one go, you can ask HMRC for a Time to Pay instalment arrangement.

How To Respond To The Letter

If You Owe Nothing

If you have concluded you owe nothing—you were selling your own possessions, you are within the trading allowance, your income is already declared, or it was a chattels sale within the exemption—it is still worth replying to the letter, using the address or contact shown on it and quoting your case reference. Ignoring it tends to escalate matters: silence can turn a soft prompt into a formal enquiry or a discovery assessment, and if HMRC catches up with you later your disclosure counts as prompted, which carries a higher minimum penalty than coming forward now. A short, clear response usually closes it.

Explain your position briefly and keep copies of your reasoning and any figures (your sales records, the platform statement). On the enclosed certificate of tax position, remember the CIOT and LITRG caution above: there is no legal obligation to sign it, and a false declaration carries risk. Many people simply write back setting out their position rather than signing a form they do not have to. If you are unsure, that is a fair point to take to an adviser before you sign anything.

If You Have Undeclared Income

If you have realised you do have undeclared trading income, the cleaner route is to come forward voluntarily rather than wait for HMRC to assess you. HMRC's letters typically point to the Digital Disclosure Service for this, with disclosures often sent to [email protected] quoting your case reference. A voluntary disclosure generally leads to lower penalties than sitting on the problem until HMRC acts.

Can You Challenge An Assessment Or Penalty?

If HMRC does go further and raises an assessment or penalty you think is wrong, you have full appeal rights. The grounds map onto the substance above:

You were not trading—you were selling your own possessions. The burden is on HMRC to show a trade existed; the badges of trade are the battleground.
You were within the trading allowance—your gross income was £1,000 or less, or HMRC's partial-relief calculation is wrong.
The figures are wrong—a common and powerful point. HMRC sometimes treats your gross platform receipts as if they were profit. They are not. Platform fees, postage, packaging, refunds, returns and the cost of goods all come out first. Your taxable profit can be a fraction of the headline turnover.
It is CGT, not income—and within the £6,000 chattels exemption.
Reasonable excuse—a defence to the penalty (not the tax), guided by the four-step test in Perrin v HMRC.

The route is the same as for any HMRC dispute. You can ask for a free statutory review by a different officer (completed within 45 days), and you can appeal to the tribunal—there is no fee to do so. Our guide to writing grounds of appeal shows how to set out your case. Most of these are small-value appeals allocated to the Default Paper or Basic category, which means no costs risk—you will not be ordered to pay HMRC's costs even if you lose.

You normally have 30 days to appeal from the date of the decision. If that window has already passed, you can still try a late appeal, but you will need to explain the delay and the tribunal applies a strict test.

One caution for high-volume sellers: if your genuine trading turnover is approaching the £90,000 VAT registration threshold, registering for VAT is a separate obligation, and failing to register on time carries its own penalties—see our guide to VAT penalties and appeals. And in Milasenco v HMRC [2023] UKFTT 620 (TC), an online trader's persistent and deliberate failure to declare eBay income led to upheld assessments and penalties—a reminder that the appeal grounds above work best for honest mistakes, not concealment.

What To Do Now

Don't panic, and don't ignore it. A nudge letter is a prompt to check, not a bill. But it does need a reply.
Work out what you were actually doing. Selling your own used possessions? Within the £1,000 trading allowance? Renting a room within the £7,500 relief? Sold one valuable item (CGT)? If any of these fit, you very likely owe nothing.
Gather your records. Platform statements, sales figures, and—if you were trading—your costs (fees, postage, cost of goods). These both prove you owe nothing and reduce any genuine liability.
Respond to the letter within the time it gives. Set out your position clearly. Don't sign the certificate of tax position without understanding what you are confirming.
If you do have undeclared income, consider a voluntary disclosure through the Digital Disclosure Service—it usually beats waiting for HMRC.
Check any assessment or penalty carefully for the most common error: HMRC taxing gross receipts as if they were profit. You have 30 days to appeal.
If unsure, get help. TaxAid (taxaid.org.uk) and the Low Incomes Tax Reform Group (litrg.org.uk) offer free guidance; a Chartered Tax Adviser or accountant can be engaged for one piece of work without an ongoing commitment.

For the bigger picture of how any HMRC dispute unfolds, see our tax dispute timeline and understanding your HMRC appeal rights.

Key Legislation And Resources

Legislation

Platform Operators (Due Diligence and Reporting Requirements) Regulations 2023 (SI 2023/817)—the platform-reporting regime
Sections 783A onwards, ITTOIA 2005—the trading and property allowances (introduced by Finance (No.2) Act 2017, Schedule 3)
Section 262, TCGA 1992—the £6,000 chattels exemption and marginal relief
Section 7, TMA 1970—duty to notify chargeability by 5 October
Section 29, TMA 1970—discovery assessments
Schedule 41, Finance Act 2008—failure-to-notify penalties

GOV.UK Guidance

Check if you need to tell HMRC about your income from online platforms—HMRC's plain-English explainer
Tax-free allowances on property and trading income—the £1,000 allowances
Rent a Room Scheme—the £7,500 relief
Business Income Manual BIM20205—HMRC's summary of the badges of trade
Compliance Handbook CH72700—potential lost revenue for failure to notify

Key Cases

Marson v Morton [1986] 1 WLR 1343—the nine badges of trade; stresses they are not an exhaustive checklist
Milasenco v HMRC [2023] UKFTT 620 (TC)—deliberate failure by an online trader to declare income; assessments and penalties upheld

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This article is for informational purposes only and does not constitute legal or tax advice. For advice specific to your situation, consult a qualified tax adviser, accountant, or solicitor.