You sell a few things online, do some dog walking at weekends, or earn a bit making TikTok content. At what point does HMRC actually need to know about it?
The honest answer is that people usually ask one question when they actually need to be asking three:
- Is this even taxable trading in the first place?
- Do you need to tell HMRC about it?
- And will you actually owe any tax?
Those are not the same question, and mixing them up is where most of the confusion starts. By the end of this, you’ll be able to answer all three using your own numbers.
Does What I’m Doing Actually Count as a Side Hustle for Tax?
Before we even touch the £1,000 figure everyone talks about, it’s worth working out whether what you’re doing counts as trading at all. Otherwise, you’ll assume every pound that lands in your PayPal from Vinted, eBay, or Facebook Marketplace counts towards the threshold, and for a lot of people it simply doesn’t.
What HMRC is actually looking for
HMRC generally sees you as trading where you buy goods intending to resell them for a profit, make things with the intention of selling them, provide a paid service, create content for money or free products, or hire out equipment you own.
In practice, that covers a huge range of activity: dog walking, tutoring, photography, delivery driving, gardening, selling handmade products, reselling trainers or clothes for a profit, YouTube and TikTok income, influencer work, paid newsletters and online courses.
It’s part of why younger sellers building income through Depop and Vinted have found themselves needing to think about tax much earlier than they expected.
If you’re doing more than one of these, the income from each gets added together when working out whether you’ve crossed the trading allowance, rather than being looked at separately.
Selling your own belongings is a different thing entirely
This distinction matters more than almost anything else in this article, mostly because of how much traffic comes from people panicking about Vinted and eBay. If you’re clearing your old clothes, unused furniture or your kids’ outgrown toys out of the loft, you are not automatically trading just because you happened to sell them through an app. HMRC’s own guidance uses exactly this example: someone clearing unwanted belongings from their attic, and says they are unlikely to need to report that income. Buying items specifically with a view to reselling them at a profit is a different story.
A simple starting test is to ask yourself: did I acquire or create this specifically to make money from it? That’s not the full legal test HMRC would apply, but it’s a genuinely useful gut check. One more thing worth flagging early: selling particularly valuable personal possessions can raise separate Capital Gains Tax questions of its own, so “not trading” doesn’t always mean “definitely no tax to think about.”
How Does the £1,000 Side Hustle Allowance Actually Work?
This is where a lot of people get confused, so let’s break it down.
Isn’t the threshold about to rise to £3,000?
You may well have seen headlines about this, so let’s clear it up before going any further. The government has announced plans to raise the Self Assessment reporting threshold for trading income from £1,000 to £3,000, with a simpler online service planned for anyone earning between those two figures.
That change is genuinely coming, but it is not in force yet. Right now, HMRC’s current guidance is unambiguous: anyone earning more than £1,000 still needs to tell them. Everything below uses today’s £1,000 figure, which is the one that actually applies to your tax return until the new rule takes effect.
It’s gross income, not profit
The £1,000 figure is based on what you receive, not what you keep. If you take in £1,200 from a side hustle but spend £700 earning it, your gross trading income for reporting purposes is still £1,200, not £500. That trips up a lot of people who assume the allowance works like a profit margin.
One allowance, not one per side hustle
One allowance, not one per side hustle
You don’t get a fresh £1,000 for every different way you earn money on the side. Here’s a simple example:
| Side hustle | Gross income |
| Dog walking | £650 |
| Selling handmade products | £500 |
| Total | £1,150 |
This person cannot claim £1,000 against each activity separately. Their combined trading income is £1,150, which means they’ve gone over the current reporting threshold, even though neither individual hustle looks like much on its own.
What actually happens once you cross £1,000
This is where a lot of articles get sloppy. Going from £999 to £1,001 doesn’t suddenly mean paying tax on the full £1,001. Once your income goes over £1,000, you generally get to choose between two ways of working out your taxable profit: use the trading allowance, which means gross income minus up to £1,000, or deduct your actual allowable business expenses instead. You can’t do both on the same income.
Say you earned £2,000 and spent £400 getting there. With the trading allowance, that’s £2,000 minus £1,000, leaving £1,000 of taxable profit. With actual expenses, it’s £2,000 minus £400, leaving £1,600 of taxable profit. In this example, the trading allowance clearly wins. Generally speaking, if your real expenses run higher than £1,000, claiming them properly instead of the flat allowance tends to work out better for you.
Do Vinted, eBay and Other Apps Report My Side Hustle to HMRC?
This deserves its own section because it’s probably the single biggest source of panic online, and most of what gets shared about it isn’t quite right.
The “30 items” myth
There’s no rule anywhere that says selling 30 items automatically makes you taxable. What actually exists is a separate reporting obligation that sits with the platforms themselves. Since the start of 2024, major platforms including eBay, Vinted, Airbnb and Depop have had to collect and share seller information with HMRC. Where the relevant exemption applies, a platform doesn’t have to send your details to HMRC at all if you’re below their reporting thresholds, broadly fewer than 30 sales and less than roughly £1,700 from those goods in a year. But whether a platform reports you is a rule about the platform’s paperwork, not a new tax threshold that applies to you as a seller. HMRC’s own side hustle guidance is explicit that selling 30 items doesn’t automatically mean tax is owed.
Two sellers, two very different stories
Picture someone clearing out a wardrobe, 40 old items sold for £1,500 in total. A platform reporting those sales doesn’t turn that person into a trader overnight. Now picture someone who deliberately bought 20 pairs of trainers cheaply to resell, also totalling £1,500. Fewer transactions, but the activity looks far more like a genuine trade. The number of sales tells you almost nothing; the intention behind them tells you everything.
Watch out for the calendar year trap
Platforms tend to hand over figures covering 1 January to 31 December, but UK Income Tax runs on the tax year, 6 April to 5 April. HMRC specifically warns people not to simply copy a platform’s calendar year total and assume that’s their tax year figure. It’s a small point, but it genuinely catches people out, so it’s worth double-checking your own dates before you draw any conclusions.
Use This Five-Step Test to See If You Need to Tell HMRC
Rather than reading through more general guidance, work through this with your actual numbers.
Step 1: List every money-making activity
Write down everything, not just the one you consider your “real” side hustle. Small, irregular bits of income count too.
Step 2: Remove anything that isn’t actually trading
Take out ordinary sales of unwanted personal belongings. But don’t automatically strike something off your list just because you think of it as a hobby. HMRC has been clear that goods made as a hobby can still count as trading income if they’re made with the intention of being sold.
Step 3: Add up the gross income
Do this before fees, postage, or any expenses come off. For example:
Photography – £450 Dog walking – £375 Etsy products – £500
That’s a total of £1,325, which puts this person above the current £1,000 threshold.
Step 4: Check the less common exceptions
Before you settle on an answer, it’s worth flagging that the trading allowance can’t be used against certain income, including money received from a company you or someone connected to you controls, certain connected partnerships, or your own employer or your spouse or civil partner’s employer. It also doesn’t apply to partnership trading income. Most people won’t hit any of these, but it’s worth a quick check before you assume the standard rules apply.
Step 5: Get your answer
If your gross eligible trading income is £1,000 or less, you generally won’t need to tell HMRC about it, though there are exceptions and it’s still sensible to keep records. If it’s above £1,000, you’ll normally need to tell HMRC. If you’re already completing Self Assessment for other reasons, you simply declare this income through your existing return rather than registering again.
If you’re still not sure after working through this, HMRC provides an anonymous online checker specifically built to help people establish whether their extra income needs reporting, which is worth using as a final sanity check.
What Do I Do If My Side Hustle Does Need Declaring?
If you’ve worked through the test above and landed on “yes, I need to tell HMRC,” here’s what happens next.
Registering with HMRC
If this is the first tax year you’ve needed to report side hustle income, the registration deadline is 5 October following the end of that tax year. For someone who first crossed the threshold in the 2025/26 tax year, that means registering by 5 October 2026, with the online return and any tax due generally following by 31 January 2027. The timeless version of that rule, worth remembering for any future year, is to register by 5 October following the end of the tax year the obligation started in.
What if I already have a full-time job?
Having PAYE employment doesn’t quietly deal with separate side hustle income for you. HMRC still expects you to tell it about earnings outside your main job, even though your salary is already taxed automatically. The exception is genuine second employment where you get a proper payslip, which is normally handled through PAYE rather than Self Assessment.
If your side hustle is starting to feel less like a hobby and more like an actual client-based business, with people booking you directly or paying you for ongoing work, it’s worth getting into good habits early. Vetting new enquiries with a client red flag checklist before you agree to anything can save a lot of grief once you’re juggling paying customers alongside HMRC paperwork.
Declaring income doesn’t automatically mean owing tax
Keep this distinction really clear in your head. The £1,000 threshold decides whether you generally need to report the income at all. What you actually owe depends on your total taxable profit and your wider tax position, including your Personal Allowance. It’s entirely possible to be required to tell HMRC about something and still end up owing little or nothing once everything is calculated properly.
What Records Should I Start Keeping Now?
Even if you’re currently sitting comfortably under £1,000, don’t rely on memory. HMRC expects anyone using the trading allowance to hold onto proper records, and that can include invoices, bank statements, spreadsheets, payment platform statements and emails confirming payment.
A simple spreadsheet to start with
Five columns will cover most people: date, activity, customer or platform, gross amount, and expense. Alongside that, hang onto platform statements, receipts, invoices, bank transactions, records of fees and commissions, and evidence of any expenses you’re claiming.
If you’re completing Self Assessment as a self-employed person, HMRC generally expects business records to be kept for at least five years after the relevant 31 January filing deadline, and if you’re navigating Making Tax Digital alongside a growing side hustle, digital record keeping becomes even more worth setting up properly from the start.
Turn it into a monthly habit
Once a month, add your new income, total up the tax year figure so far, check how close it’s getting to £1,000, update your expenses, and save the evidence as you go. Do this consistently and crossing the threshold becomes something you see coming from a mile off, rather than something you discover with dread the following January.
Work It Out Before HMRC Has to Ask
Three figures are all you actually need. What did you sell or provide? What was your total gross trading income? Has it passed £1,000? Keep records from the very first pound you earn, and if you’re still unsure, use HMRC’s own checker rather than guessing. Getting ahead of it now is a lot less stressful than getting a letter later.
