Side hustles have exploded in the UK over the past few years.

Recent surveys suggest millions of people now earn extra income outside their main job, whether that’s freelancing, selling online or building digital projects.

I run side hustles myself, and I know how confusing the rules around tax can feel at first. So I thought it would be helpful to pull everything together in one place so you know where you stand.

This article breaks down the Side Hustle (Trading) Allowance, what it covers, how it works, and what you need to do if you earn money on the side.

What Is the Side Hustle / Trading Allowance?

The Trading Allowance is a tax-free allowance that lets you earn a small amount of money from casual income, trading or side hustles without paying tax or declaring it to HMRC. It applies to people earning extra money outside their main job, whether that’s selling things, providing services, or earning from online content.

How Much Is the Allowance?

You can earn up to £1,000 a year in gross side-hustle income without paying tax or registering for Self Assessment. Gross income means before expenses. So if you sold £1,000 worth of items or made £1,000 of affiliate income, you have hit the allowance even if expenses reduce your profit. If you go over £1,000 in a tax year, you must declare it.

Why You Need To Know This

A lot of people assume that small amounts of online income are “just a hobby” and don’t count. But HMRC now receives data from many online platforms, meaning side-hustle earnings are much more visible than before. People are falling foul of the rules simply because they don’t realise what counts as income or when it becomes taxable. Knowing the threshold helps you stay within the rules, avoid penalties and decide when you need to register for Self Assessment.

What Does the Allowance Cover?

The Trading Allowance covers a wide range of small-scale income, including selling goods online (eBay, Vinted, Depop, Facebook Marketplace), freelance or casual services (tutoring, design work, gardening, etc.), website income such as affiliate links, Amazon Associates and display ads, content creation revenue (YouTube ads, Instagram partnerships, digital downloads), and hobby income that starts to generate cash. It is designed for people earning small amounts, not running a full business.

Examples of How It Works

Example 1. You run a small blog and make £450 from Amazon Associates in a year. That’s within the £1,000 allowance and does not need to be declared.
Example 2: You earn £600 from your website and £300 tutoring. Combined, that’s £900 — still within the allowance.
Example 3: You earn £1,400 from content creation in a year. You must declare this to HMRC and complete a Self Assessment tax return. You can choose to deduct the £1,000 Trading Allowance or deduct actual business expenses.

Does It Include Items I Sell on Vinted?

Yes — but it depends on the nature of the sales. If you are simply decluttering and selling your own belongings, those sales fall under the Trading Allowance and are usually not taxable as long as the total is under £1,000. However, if you are buying items specifically to resell for profit, you are considered to be trading. If the total gross income exceeds £1,000, you must declare it.

Do I Need To Declare It on Self Assessment?

If your total gross side-hustle income is £1,000 or less, you do not need to register or declare it. If your income exceeds £1,000, you must register for Self Assessment and file a tax return. You can then either claim the £1,000 Trading Allowance or deduct actual expenses, whichever gives the better tax position.

Key Things to Be Aware Of With the Trading Allowance

1. The £1,000 allowance is total, not per platform

Many people think they get £1,000 for each platform they earn from. They don’t. The allowance is a single £1,000 limit that covers all your side-hustle income combined. For example, if you make £400 on Vinted, £500 from Amazon Associates and £200 tutoring, your total is £1,100. That puts you over the allowance and means you must declare the income.

2. It is based on gross income

HMRC looks at gross income, not profit. If you earn £1,300 and spend £400 on expenses, you might think your “real” profit is £900. But because the gross total is over £1,000, you need to register for Self Assessment. Expenses only come into play once you are filing a return.

3. Selling personal items at a loss still counts towards your total

If you bought a coat for £150 and sell it on Vinted for £20, you’re selling at a loss — there’s no tax on that. But the £20 still counts towards your £1,000 annual trading allowance total. Enough small sales can unexpectedly push someone over the threshold.

4. HMRC now receives data from online platforms

Since the new reporting rules came in, HMRC receives data from many platforms including Vinted, eBay and Etsy. This doesn’t automatically mean you owe tax, but it does mean HMRC can see who is selling regularly or earning meaningful amounts, making it important to stay compliant.

5. Once you exceed £1,000 you must register, even if profit is tiny

Cross the threshold by even £1 and you must declare. After that point you can choose between claiming the £1,000 allowance or deducting actual business expenses, depending on which gives the best tax position. But you can’t ignore it.

6. Mixing hobby selling with actual trading can cause confusion

If you are just decluttering, it’s usually fine. But if you regularly buy items with the intention of reselling them for profit, HMRC may consider you to be trading. Inconsistent behaviour (e.g. some personal sales, some clear reselling) can raise questions, so keep basic records.

7. Your side hustle can push you into a higher tax bracket

If you already earn close to the higher-rate threshold, extra untaxed income from side hustles may push you into a higher band. It’s important to keep an eye on your total income for the year, not just the side hustle itself.

8. You may need to keep receipts and records once you pass the threshold

If you decide to claim actual expenses instead of the £1,000 allowance, HMRC expects you to keep evidence. For most small hustlers this is simple: screenshots, email confirmations, order numbers, app histories.

9. The allowance does not apply to rental income

It only applies to trading income. Property income has its own separate £1,000 “property allowance”, which is entirely different.

10. Ignoring the rules can lead to penalties

Most people never have an issue. But if you consistently earn over the threshold and don’t declare it, HMRC can charge interest and penalties. Knowing the rules avoids any of that stress.

A Few Final Thoughts

The Trading Allowance is a helpful rule for small side hustles. But once you start earning more, or earning consistently, you quickly move beyond casual income and into territory where you need to keep records and file a return. If you run websites, do affiliate marketing, create online content or sell regularly on platforms like Vinted, keep a note of your earnings as you go. It makes things far easier at the end of the year.

Dave

And always seek professional advice on your tax affairs, this article is for information only.