The UK side hustle economy is booming, with millions of people earning extra income through TikTok, Etsy, Vinted, eBay, freelancing, delivery apps and online marketplaces.
Whether you are selling handmade products, creating content online, offering freelance services or earning money through gig economy platforms, it is important to understand your tax responsibilities.
As side hustles become more common, HMRC is receiving more information from digital platforms than ever before. The good news is that staying compliant is usually straightforward when you understand the rules.
If you are unsure whether you need to declare your income, our Self Assessment Tax Return Help UK page explains the process and how we can help.
Do You Need to Declare Side Hustle Income?
Many people assume that a side hustle is tax free. In reality, it depends on how much you earn and the type of activity involved.
In most cases, if you earn more than £1,000 from self employed activities during a tax year, you may need to register for Self Assessment and report your income to HMRC.
This £1,000 allowance is known as the Trading Allowance.
If your side hustle income exceeds the allowance, you may need to:
• Submit a Self Assessment tax return
• Pay Income Tax on your profits
• Pay National Insurance contributions if applicable
• Keep records of your income and expenses
The deadline for online Self Assessment tax returns is 31 January following the end of the tax year.
Example: How Side Hustle Tax Works
Imagine you earned £6,000 from freelance work during the tax year.
Income: £6,000
Allowable expenses: £1,200
Taxable profit: £4,800
Depending on your circumstances, HMRC will calculate any Income Tax and National Insurance due based on your profit and total income.
Keeping accurate records throughout the year can make this process significantly easier and may help reduce your tax bill by ensuring all allowable expenses are claimed.
Common Side Hustle Tax Mistakes
Assuming HMRC Will Not Know About Your Income
Many people believe small amounts of online income go unnoticed.
However, digital platforms are increasingly sharing information with tax authorities. HMRC has access to more data than ever and can compare information from multiple sources.
If you have been earning income through online platforms, it is important to understand your reporting obligations before a problem develops.
Mixing Personal and Business Finances
Using personal bank accounts and payment platforms for business transactions can quickly create confusion.
A separate bank account for your side hustle makes it easier to:
• Track income
• Record expenses
• Prepare tax returns
• Respond to HMRC queries
Many side hustlers also find that dedicated bookkeeping systems save significant time when tax return deadlines approach.
Forgetting About Other Types of Income
Not all additional income falls under the Trading Allowance rules.
For example:
• Rental income may have different tax treatment
• Cryptocurrency transactions can create Capital Gains Tax obligations
• Investment income may have separate reporting requirements
• Overseas income may need to be declared in the UK
Every situation is different, particularly if you have multiple income streams.
Side Hustle Tax Examples
Etsy Seller
Sarah sells handmade candles online and earns £4,500 during the tax year.
Income: £4,500
Expenses: £900
Profit: £3,600
Because she is trading with the intention of making a profit, she may need to report her earnings to HMRC.
Vinted Seller
John occasionally sells unwanted personal clothes from his wardrobe.
Total sales: £1,800
Original purchase cost: £3,000
As he is simply disposing of personal items at a loss rather than operating a business, a tax liability may not arise.
Freelance Designer
Emma earns £12,000 from freelance design work alongside her employment.
She must consider Self Assessment requirements and may need to pay tax on her profits depending on her overall income position.
Smart Tax Tips for Side Hustlers
If you want to avoid surprises, consider the following:
• Keep records of all income and expenses
• Save copies of invoices and receipts
• Put aside part of your earnings for tax
• Review your tax position regularly
• Seek advice before problems arise
Many people find that setting aside around 25 to 30 percent of side hustle income helps them prepare for future tax liabilities.
Have You Forgotten to Declare Income?
If you have earned side hustle income in previous years and have not reported it, it is usually better to act sooner rather than later.
HMRC provides routes for taxpayers to disclose undeclared income voluntarily. In many cases, taking action before HMRC contacts you can result in lower penalties than waiting for an investigation.
If you have received HMRC letters, penalties or compliance checks, our HMRC Penalty Help and Late Tax Return Support service may be able to help.
How Friendly Assist Accountancy Can Help
At Friendly Assist Accountancy, we help side hustlers, freelancers, online sellers and content creators understand their tax obligations and stay compliant.
We can help with:
• HMRC registrations
• Allowable expense claims
• Tax advice for online businesses and creators
We work with both UK and international clients and provide practical advice without jargon.
Need Help With Side Hustle Tax?
Whether you earn money through Etsy, Vinted, TikTok, YouTube, freelance work, delivery platforms or other online activities, getting professional advice early can save time, stress and money.
If you are unsure whether your side hustle income needs to be declared, contact Friendly Assist Accountancy today.
Your first 15min telephone consultation is free.
Frequently Asked Questions
Do I need to tell HMRC about my side hustle if I earn less than £1,000?
In many cases, income below the Trading Allowance does not need to be reported. However, individual circumstances vary and professional advice may be beneficial.
What happens if I do not declare side hustle income?
You could face interest, penalties and additional tax liabilities. The sooner you address the issue, the more options are usually available.
Can I claim expenses against my side hustle income?
Yes. Legitimate business expenses can often be deducted when calculating taxable profits.
Do I need to register as self employed?
If you regularly earn income through a side business or freelance activity, you may need to register. The exact position depends on your circumstances.
Can Friendly Assist Accountancy help with late tax returns?
Yes. We regularly assist clients with late tax returns, HMRC correspondence and disclosure matters.
Related Services
Self Assessment Tax Return Help UK
HMRC Penalty Help and Late Tax Return Support
Bookkeeping Services
Limited Company Accounting Services