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Freelancer Tax Guide: Everything You Need to Know About Tax as a Freelancer in the UK
- Jessica Barnett
- 6 days ago
- 14 min read
If the words "self assessment" make your stomach drop, you're not alone. For millions of freelancers across the UK, tax is the part of self-employment nobody warned you about — confusing, the deadlines feel arbitrary, and getting it wrong can be costly.
Here's the thing: freelancer tax is far more manageable than it appears, once you understand how it actually works.
This guide covers everything you need to know for the 2025/26 tax year — how much tax you'll pay, what you can claim, key deadlines, IR35, Making Tax Digital and more. Whether you've just gone freelance or have been filing your own returns for years, this is your plain-English guide to staying on top of your tax obligations.
DO FREELANCERS PAY TAX IN THE UK?
Yes. All freelancers earning more than £1,000 per year from self-employment must pay tax and report their income to HMRC through a Self Assessment tax return.
Unlike employees, whose tax is deducted automatically through PAYE, freelancers are responsible for calculating and paying their own tax. The money arrives in your account with no deductions — which feels great until January, when HMRC expects payment.
The three taxes most freelancers pay are:
Income Tax — on profits above the Personal Allowance
National Insurance (Class 4) — on self-employed profits
VAT — only if your annual turnover exceeds £90,000
REGISTERING AS SELF-EMPLOYED
Before you can file a tax return, you need to register with HMRC:
Create a Government Gateway account at gov.uk
Register for Self Assessment online
HMRC will post your Unique Taxpayer Reference (UTR) number within approximately 15 days
Use your UTR to file returns going forward
You must register by 5 October following the end of the tax year in which you started freelancing. So if you began working for yourself in the 2025/26 tax year (6 April 2025 to 5 April 2026), you must register by 5 October 2026.
Registering late can result in penalties, so do it as soon as you start trading.
HOW MUCH TAX DO FREELANCERS PAY?
You pay tax on your profits. That's your income minus your allowable business expenses. This is an important distinction: you are not taxed on everything you invoice, only on what remains after legitimate business costs are deducted.
Income Tax Rates for 2025/26 (England, Wales and Northern Ireland)
Personal Allowance (0%): Up to £12,570
Basic rate (20%): £12,571 to £50,270
Higher rate (40%): £50,271 to £125,140
Additional rate (45%): Over £125,140
Note: These thresholds are unchanged from 2024/25 and are now frozen until April 2031 following the October 2024 Budget. If your income exceeds £100,000, your Personal Allowance reduces by £1 for every £2 earned above that figure, creating an effective 60% tax rate on income between £100,000 and £125,140. Pension contributions are the most powerful tool to manage this.
National Insurance for Freelancers in 2025/26
Class 2 NI was abolished as a mandatory charge from April 2024. You are no longer required to pay a flat weekly rate. However, voluntary Class 2 contributions of £3.50 per week remain available and may be worth considering if your profits are below the Small Profits Threshold (£6,845 for 2025/26), as paying them helps protect your State Pension qualifying years.
The main NI obligation for freelancers is Class 4:
Class 4 NI (6%): On profits between £12,570 and £50,270
Class 4 NI (2%): On profits above £50,270
If your profits exceed £6,845, you automatically receive NI credits that count toward your State Pension entitlement — even without paying voluntary Class 2.
A Practical Example
You earn £40,000 in freelance income and have £5,000 in allowable expenses. Your taxable profit is £35,000.
First £12,570: tax-free (Personal Allowance)
Remaining £22,430 taxed at 20% income tax: £4,486
Class 4 NI on £22,430 at 6%: £1,346
Total tax and NI due: approximately £5,832
On a £35,000 profit, that's an effective rate of just under 17%. As a working rule, set aside 25–30% of every invoice payment into a separate savings account. When January arrives, the money is sitting there waiting.
SELF ASSESSMENT — HOW TO FILE YOUR TAX RETURN
Your Self Assessment tax return covers the tax year from 6 April to 5 April. These are the deadlines that matter:
31 October: Deadline for paper tax returns
31 January: Deadline for online Self Assessment returns
31 January: Deadline to pay any tax owed for the previous year
31 July: Second payment on account (see below)
Filing online gives you three extra months compared to paper returns, and the vast majority of freelancers file online.
What do you need to file?
Your UTR (Unique Taxpayer Reference)
A summary of all your self-employment income
Details of all your allowable business expenses
Any other income (employment, rental, dividends, savings interest)
Records of any tax already paid
The sooner you file after 5 April, the better. Filing in May or June means you know exactly what you owe months before the payment deadline — giving you time to save and plan.
What is Payment on Account?
This catches many first-time freelancers completely off guard. If your Self Assessment tax bill exceeds £1,000, HMRC requires you to make advance payments toward the following year's tax bill.
Here's how it works:
Payment 1: 50% of the previous year's bill — due 31 January (alongside your current year payment)
Payment 2: 50% of the previous year's bill — due 31 July
So in your first year with a substantial tax bill, you'll pay your actual liability plus an advance payment toward next year — all in the same January. In your first significant year, budget for 1.5 times your estimated tax bill.
If your income drops, you can apply to reduce your Payments on Account using form SA303 through your HMRC online account. Be accurate — if you underestimate, HMRC will charge interest on the shortfall.
WHAT EXPENSES CAN FREELANCERS CLAIM?
This is where many freelancers leave money on the table. Every allowable expense reduces your taxable profit — and therefore your tax bill. The golden rule: an expense must be "wholly and exclusively" for business purposes to be claimable.
Home Office
Option 1 — Flat rate: Claim £6 per week (£312 per year) with no receipts needed. Simple and straightforward.
Option 2 — Actual costs: Claim a proportion of your rent or mortgage interest, utility bills, broadband and council tax, based on the number of rooms used for work and hours worked. More administration but often more generous if you work from home full-time.
Equipment and Technology
Computers, laptops, tablets, monitors, keyboards, mice
Printers, scanners, cameras, microphones, headphones
External hard drives, USB hubs, any peripherals used for work
Mobile phone (business use proportion only)
Desks, chairs and office furniture used exclusively for work
Software and Subscriptions
Adobe Creative Cloud, Microsoft 365, or any software used for your work
Project management tools (Notion, Asana, Trello)
Communication tools (Slack, Zoom, Teams)
Cloud storage (Dropbox, Google Drive)
Accounting software such as Xero, Sage or QuickBooks
Website hosting, domain names and website maintenance costs
Travel and Transport
Business mileage at HMRC approved rates: 45p per mile for the first 10,000 business miles per year, 25p per mile thereafter (unchanged for 2025/26)
Train and bus fares for client visits and business trips
Taxis for business journeys
Parking costs for business visits (but not parking fines)
Hotel and accommodation costs for genuine overnight business trips
Marketing and Online Presence
Website design and development costs
Social media advertising
Business cards, brochures and print marketing
Portfolio costs and photography for professional use
Professional Development
Training courses directly related to your trade or industry
Books, online courses and professional publications
Industry conference tickets and events
Professional Fees
Accountancy fees — your Barnett & Co fees are a legitimate business expense
Professional association memberships and subscriptions
Trade journals and industry publications
Professional indemnity insurance and public liability insurance
Legal fees directly related to your business
Banking and Finance
Business bank account fees and charges
Payment processing fees (PayPal, Stripe, etc.) on client payments
Pension Contributions
This is one of the most powerful and under-used ways to reduce your tax bill as a freelancer:
Contributions to a personal pension or SIPP come from pre-tax income
HMRC automatically adds 20% basic rate tax relief to personal contributions
Higher rate taxpayers claim an additional 20% through Self Assessment
A £800 personal contribution becomes £1,000 in your pension immediately
For higher rate taxpayers, that same £800 contribution costs just £600 in real terms
If your income is between £100,000 and £125,140, pension contributions can restore your Personal Allowance — effectively saving 60p in tax for every £1 contributed. It's one of the most efficient uses of money available to any freelancer.
What you cannot claim
Everyday clothing (even if worn only for work — unless it's a uniform or protective wear)
Food and drink during a normal working day (unless genuinely travelling away from base)
Parking penalties and speeding fines
Client entertainment (HMRC does not allow these)
The personal element of any mixed-use expense
💡 Not sure what you can claim? At Barnett & Co, we review every freelancer client's expenses to make sure you're claiming everything you're entitled to — legally reducing your tax bill without the stress. Based in Crewe and working with freelancers across the UK.
Book a free consultation: barnettandco.uk/contact
VAT — DO FREELANCERS NEED TO REGISTER?
You must register for VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period. Note: this is based on your turnover, not your profit. The £90,000 threshold has been in place since April 2024 and remains unchanged for 2025/26.
Once registered, you must:
Charge VAT (usually 20%) on your invoices
File quarterly VAT returns using MTD-compatible software
Pay the VAT you've collected to HMRC, minus any VAT you've paid on business purchases
You also have 30 days to register once you exceed the threshold — not at your next tax year end. HMRC assesses this on a rolling monthly basis, so monitor your turnover regularly if you're approaching £90,000.
Voluntary registration below the threshold
You can register voluntarily. This makes sense if your clients are mainly VAT-registered businesses (they reclaim the VAT you charge, so it costs them nothing) and you have significant VAT on your own expenses to reclaim. For freelancers selling to individual consumers, adding 20% VAT to prices may reduce your competitiveness.
The VAT Flat Rate Scheme
If your turnover is under £150,000, the Flat Rate Scheme is worth considering. Rather than calculating the exact difference between VAT charged and VAT paid, you pay a fixed percentage of your gross turnover to HMRC. The percentage varies by sector. This simplifies administration and can sometimes result in a saving — particularly for service-based freelancers with low expenses. We can model whether the Flat Rate Scheme would benefit you specifically.
IR35 — WHAT FREELANCERS NEED TO KNOW
IR35 is the UK's off-payroll working legislation, designed to prevent "disguised employment" — where someone operates through their own limited company but works functionally as an employee.
If you operate through a Personal Service Company (PSC) and provide services to clients, IR35 may apply to some or all of your contracts.
The three employment status tests
Control: Does the client control how, when and where you work? The more control the client has, the more the arrangement resembles employment.
Substitution: Could you send someone else in your place to complete the work? A genuine contractor can substitute — an employee cannot.
Mutuality of obligation (MOO): Is the client obliged to offer you work, and are you obliged to accept it? If yes to both, that points strongly toward employment.
Inside vs outside IR35
Outside IR35 means HMRC considers you genuinely self-employed. You pay yourself through a tax-efficient combination of salary and dividends.
Inside IR35 means the engagement is deemed employment-like. You must pay income tax and National Insurance on that income as if you were employed — losing the main tax advantage of the limited company structure.
Who determines your IR35 status?
Large and medium-sized private sector clients: The client determines your status (since April 2021)
Small companies (fewer than 50 employees, under £10.2m turnover): You determine your own status
Public sector: The public authority has always determined status (since 2017)
HMRC provides a free tool called CEST (Check Employment Status for Tax) at gov.uk, which gives a determination based on your answers. It's a useful starting point but doesn't cover every nuance — professional advice is recommended for higher-value or longer-term contracts.
Getting IR35 wrong can result in a substantial retrospective tax bill covering unpaid income tax and NI for the entire duration of the contract, plus interest and penalties.
💡 Worried about IR35? Our team at Barnett & Co can review your contracts and working arrangements to help you understand your status and manage your risk. Fixed-fee advice, no surprises.
Visit barnettandco.uk/contact
MAKING TAX DIGITAL FOR FREELANCERS
Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is one of the most significant changes coming for freelancers, and it is closer than many people realise.
Key dates:
From April 2026: Mandatory for freelancers and landlords with annual gross income over £50,000
From April 2027: Mandatory for those with annual gross income over £30,000
Under MTD ITSA, instead of filing one annual Self Assessment return, you will be required to:
Keep digital records throughout the year (in MTD-compatible software)
Submit quarterly updates to HMRC (deadlines roughly in August, November, February and May)
Submit a final year-end declaration
If you are already using accounting software such as Xero, Sage or QuickBooks, you are likely ready. If you are still managing records on spreadsheets or paper, the time to make the switch is now — not in April 2026.
The quarterly updates are shorter than a full annual return; you're essentially submitting a summary of your income and expenses each quarter. Many freelancers who have made the transition find it actually reduces the January stress by spreading the work throughout the year.
SOLE TRADER VS LIMITED COMPANY — WHICH IS RIGHT FOR YOU?
Most freelancers start as sole traders and consider incorporating as a limited company as their income grows. There are genuine tax advantages to operating through a limited company, but also additional responsibilities and costs.
As a sole trader:
- Simpler to set up and far less admin
- All profits taxed as personal income through Self Assessment
- Lower accountancy costs
- Works well for most freelancers up to profits of around £30,000–£35,000
As a limited company director:
The company pays Corporation Tax on profits (19% up to £50,000, 25% above £250,000, with marginal relief between)
You pay yourself a low salary up to the NI threshold (currently around £9,100 per year as a director)
Remaining profit extracted as dividends at lower personal rates: 8.75% (basic rate), 33.75% (higher rate)
Note: The dividend allowance is now just £500 for 2025/26 — significantly reduced from £2,000 in 2022/23
Additional legal obligations: Companies House filings, confirmation statements, higher accountancy costs
The tax saving from incorporating can be substantial — potentially thousands of pounds per year for a higher-earning freelancer. The exact figure depends on your income level, pension contributions and personal circumstances. We model this for Barnett & Co clients with their actual numbers, so you can make the decision based on real figures.
COMMON FREELANCER TAX MISTAKES TO AVOID
1. Not setting money aside from every invoice
Tax arrives in January, but it accumulates all year. Set aside 25–30% of every payment you receive in a dedicated savings account. When January comes, the money is ready.
2. Missing the 31 January deadline
HMRC charges an automatic £100 penalty for filing even one day late — regardless of whether you owe any tax. Further penalties apply after 3 months, 6 months and 12 months. File early. You don't pay until 31 January even if you file in May.
3. Underclaiming expenses
Many freelancers miss home office costs, mileage, professional fees and training costs. Every £100 of missed expenses costs you between £20 and £40 in unnecessary tax.
4. Being caught out by Payment on Account
In your first year with a bill over £1,000, you owe your current bill plus an advance toward next year — all at once in January. Budget for 1.5 times your estimated annual tax bill in year one.
5. Not keeping records
HMRC can investigate your tax return for up to 5 years (longer in cases of suspected fraud). Keep all invoices, receipts, bank statements and contracts for at least 5 years after the filing deadline.
6. Ignoring pension contributions
A pension is the most tax-efficient savings vehicle available to freelancers. Every £1 contributed saves 20–45p in tax depending on your rate. Many freelancers overlook this entirely and pay significantly more tax than necessary.
7. Getting IR35 wrong
Operating inside IR35 unknowingly — or ignoring the legislation — can result in a substantial retrospective tax bill. If you have a long-term relationship with a single client or work primarily on their premises, review your IR35 position.
HOW AN ACCOUNTANT CAN HELP
Many freelancers manage their own tax affairs until the point it becomes too complex — at which point the cost of getting things wrong can far exceed what they would have spent on professional help.
At Barnett & Co, we work with freelancers to:
- Identify every allowable expense (most clients recover our fee in tax savings alone)
- Advise on the most tax-efficient structure for your income level
- Handle your Self Assessment filing accurately and on time
- Correctly calculate Payments on Account
- Review IR35 status and contract structuring
- Set you up on Xero, Sage or your preferred cloud accounting software ready for MTD
- Assess whether incorporating as a limited company would benefit you
Our fees are fixed and agreed upfront — you'll always know exactly what you're paying, with no surprise invoices. We work with freelancers across the UK from our base in Crewe, Cheshire, and our client portal means you can share records and communicate with us from anywhere.
FREQUENTLY ASKED QUESTIONS
How much can I earn before paying tax as a freelancer?
The Personal Allowance for 2025/26 is £12,570 — you pay no income tax on earnings below this. However, you must still register for Self Assessment and file a return if your self-employment income exceeds £1,000 per year, even if no tax is owed.
What is the difference between a freelancer and a sole trader?
There is no legal difference. A freelancer is someone who works independently on a project or contract basis. For tax purposes, HMRC treats all self-employed individuals as sole traders, regardless of how they describe themselves.
How do I register as self-employed with HMRC?
Go to gov.uk and create a Government Gateway account, then register for Self Assessment. HMRC will post your UTR number within around 15 days. You must register by 5 October following the tax year in which you started freelancing.
Can I claim expenses before I officially start freelancing?
Yes — pre-trading expenses incurred in the seven years before your business commenced can be claimed, provided they would have been allowable had the business already been trading. Equipment purchased, website costs and professional fees before your first invoice can all qualify.
What happens if I miss the self assessment deadline?
An automatic £100 penalty applies if you miss the 31 January online filing deadline, even if you owe nothing. Daily penalties of £10 (up to £900) apply after 3 months, and a 5% surcharge on unpaid tax applies at 6 and 12 months. Interest also accrues on overdue payments.
How do I legally pay less tax as a freelancer?
The main strategies are: claim every allowable business expense, make pension contributions (which reduce your taxable profit directly), consider incorporating as a limited company if profits exceed around £30,000–£35,000, and plan the timing of significant income or expenditure around the 5 April tax year end.
Should I charge VAT as a freelancer?
You must register if your turnover exceeds £90,000 in any rolling 12-month period. Below that threshold, voluntary registration can be beneficial if most of your clients are VAT-registered businesses. For freelancers selling primarily to consumers, adding 20% to your prices may make you less competitive — weigh it up carefully.
Do I need to pay National Insurance as a freelancer?
Yes. In 2025/26, freelancers pay Class 4 NI at 6% on profits between £12,570 and £50,270, and 2% on profits above that. Mandatory Class 2 NI was abolished in April 2024. If your profits exceed £6,845, you automatically receive NI credits that protect your State Pension entitlement.
SUMMARY — FREELANCER TAX IN PLAIN ENGLISH
Freelancer tax in 2025/26 in plain English:
Register with HMRC as soon as you start freelancing — by 5 October after your first tax year
Set aside 25–30% of every payment for tax and NI
Claim every allowable business expense — home office, equipment, travel, software, professional fees, pension
File your Self Assessment return online by 31 January and pay any tax owed
Watch out for Payment on Account in your first high-earning year — budget for 1.5x your estimated bill
Review your IR35 position if you operate through a limited company
Start preparing for Making Tax Digital now — April 2026 is for income over £50,000
The most common freelancer tax mistake isn't complicated: it's simply not keeping records, not claiming what you're entitled to, and not planning ahead. Get those three things right and you will be in significantly better shape than most.
And if you'd rather hand it all to someone you trust? That's what we're here for.
Ready to take the stress out of freelancer tax?
Barnett & Co Accountants provides expert, fixed-fee accounting for freelancers across the UK. From self assessment and bookkeeping to IR35 advice and VAT returns — we handle everything so you can focus on your work. No jargon. No surprises. Just clear, proactive support.
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