Do You Pay Tax on Side Hustles in the UK? (2026 Complete Guide)

Do You Pay Tax on Side Hustles in the UK?

Side hustles have become increasingly common across the UK, whether that’s selling items online, freelancing in your spare time, or earning extra income through platforms like Etsy, eBay, or Uber. With rising living costs and more flexible ways to earn money, many people now have at least one additional income stream alongside their main job.

However, one of the most common questions people ask is simple: do you actually have to pay tax on a side hustle in the UK?

The answer is yes — but only in certain situations.

In this guide, we’ll walk through exactly how side hustle tax works in the UK, when you need to report your income, how much tax you might pay, and what steps you need to take to stay compliant with HMRC.

Understanding the £1,000 Trading Allowance

The starting point for side hustle tax in the UK is the £1,000 trading allowance. This is one of the most important rules to understand, as it determines whether you need to take any action at all.

The trading allowance means that you can earn up to £1,000 per tax year from self-employment or side income without needing to pay tax or report it to HMRC.

This applies to a wide range of activities, including:

• Selling goods online

• Freelance work

• Casual services

• Content creation income

For many people who are just starting out, this allowance effectively means that small amounts of side income are completely tax-free and require no paperwork.

However, there is an important detail that often catches people out: the £1,000 allowance is based on your total income (turnover), not your profit.

For example, if you sell items online and receive £1,200 in total payments, you have exceeded the allowance — even if your actual profit is much lower after costs.

What Happens If You Earn More Than £1,000?

Once your side hustle income exceeds £1,000 in a tax year, your situation changes.

At this point, HMRC considers you to be self-employed, and you are required to:

• Register for Self Assessment

• Submit a tax return each year

• Declare your income and expenses

This doesn’t necessarily mean you will owe a large amount of tax, but it does mean you are now operating within the tax system.

You have two options when calculating your taxable income:

Option 1: Use the £1,000 Trading Allowance

You can simply deduct £1,000 from your income and pay tax on the remainder.

Option 2: Claim Actual Expenses

Alternatively, you can deduct your real business expenses instead of using the allowance.

Most people choose whichever method results in the lowest tax bill.

How Side Hustle Tax Is Calculated

Once you are over the £1,000 threshold and reporting your income, your side hustle is taxed in the same way as any other income.

Your total taxable income includes:

• Your salary (if employed)

• Your side hustle profit

These are combined to determine which tax band you fall into.

For the 2026 tax year, the main income tax bands are:

• 20% (basic rate)

• 40% (higher rate)

• 45% (additional rate)

If your main job already uses up your personal allowance (£12,570), then your side hustle income will typically be taxed immediately at your marginal rate.

For example, if you are a basic rate taxpayer, most of your side hustle profit will be taxed at 20%.

National Insurance on Side Hustles

In addition to income tax, you may also need to pay National Insurance contributions (NICs).

This depends on your level of profit.

• If your profits are relatively low, you may not need to pay anything

• As your profits increase, Class 4 National Insurance may apply

Even if no National Insurance is due, you may still need to register and submit a return.

Example: Side Hustle Tax in Practice

To make this clearer, let’s look at a simple example.

Imagine you earn:

• £30,000 from your main job

• £5,000 profit from a side hustle

Your total income is £35,000.

Because this falls within the basic rate band, your side hustle profit will typically be taxed at 20%.

This means:

• £5,000 × 20% = £1,000 income tax

You may also need to consider National Insurance depending on thresholds and profit levels.

Do You Need to Register with HMRC?

If your side hustle income exceeds £1,000, you must register for Self Assessment.

This is done through HMRC, and once registered, you’ll need to submit a tax return each year.

The key deadline to remember is:

• 5 October following the end of the tax year

For example, if you start earning side income in the 2025–26 tax year, you must register by 5 October 2026.

Failing to register or submit your return on time can result in penalties, even if you owe little or no tax.

What HMRC Considers a Side Hustle

Not all extra income is treated the same way, but HMRC generally considers something a side hustle if you are actively trying to make a profit.

Common examples include:

• Selling products online for profit

• Freelancing or consulting work

• Driving or delivery services

• Social media or content income

On the other hand, selling personal belongings occasionally (for example, clearing out your wardrobe) is usually not treated as a business.

The key factor is intent and frequency — if you are operating regularly and aiming to make money, it is likely to be considered a taxable activity.

Situations Where You May Not Pay Tax

There are several situations where you may not need to pay tax on your side hustle income.

These include:

• Earning less than £1,000 in total

• Selling personal items at a loss

• One-off or infrequent transactions

However, it’s important to be cautious. Many people assume their activity doesn’t count, only to later realise they have crossed the threshold.

Reducing Your Tax Bill Legally

One of the advantages of being self-employed is that you can deduct allowable expenses.

This means you only pay tax on your profit, not your total income.

Typical allowable expenses include:

• Equipment and tools

• Software subscriptions

• Business travel

• A portion of home office costs

Keeping accurate records is essential, as this ensures you can justify your claims if needed.

Why HMRC Is Increasingly Focused on Side Hustles

In recent years, HMRC has increased its focus on undeclared income from online platforms.

Many platforms now share data directly with HMRC, including:

• eBay

• Etsy

• Amazon

• Payment providers

This means it is becoming much harder to avoid detection, even for relatively small amounts of income.

As a result, it’s always best to assume that your activity is visible and to report it correctly.

Common Mistakes to Avoid

There are a few common mistakes that people make when dealing with side hustle tax:

Assuming small amounts don’t matter
Even modest income can trigger reporting requirements once you exceed £1,000.

Confusing income with profit
The threshold applies to income, not profit.

Not keeping records
Without records, it becomes difficult to calculate your tax correctly.

Missing deadlines
Late filing penalties can apply even if you owe no tax.

Planning Your Finances Properly

If you’re running a side hustle alongside employment, it’s important to understand how the two interact.

Your side hustle income can:

• Push you into a higher tax band

• Increase your overall tax liability

• Affect benefits or allowances

Using a salary and tax calculator can help you understand your full position and avoid surprises at the end of the year.