Accounting for Freelancers in the UK

Freelancing in the UK means you are running a business, whether you think of yourself that way or not. HMRC certainly does. As a sole trader (the default structure for most freelancers), you are personally responsible for keeping records, calculating your tax and filing a Self Assessment return each year.

Getting the basics right from the start prevents headaches later and ensures you are not paying more tax than you need to.

Setting up correctly

Register with HMRC

You must register as self-employed with HMRC by 5 October in your second tax year of trading. For example, if you start freelancing in August, you normally register by 5 October after that tax year ends.

In practice, register as soon as you start. Late registration can result in penalties, and you will need your Unique Taxpayer Reference (UTR) to file your Self Assessment return.

Choose your business structure

Most freelancers start as a sole trader because it is the simplest option. You can also operate through a limited company, which offers some tax advantages but adds administrative overhead.

Factor	Sole trader	Limited company
Setup	Register with HMRC (free)	Register at Companies House (£12 online)
Tax filing	Self Assessment return	Corporation Tax return + personal tax return
Tax rates	Income Tax (20/40/45%) + Class 2 and 4 NIC	Corporation Tax (19-25%) + dividend tax
Personal liability	Unlimited	Limited to company assets
Admin burden	Lower	Higher (annual accounts, confirmation statement)
IR35 considerations	Not applicable	Relevant for contractor work

For most freelancers earning under £50,000, the sole trader structure is simpler and the tax difference is marginal. Once your profits regularly exceed this, it is worth getting advice on whether incorporating would save you money.

Open a separate bank account

You are not legally required to have a separate business bank account as a sole trader, but it is strongly recommended. Mixing personal and business transactions makes bookkeeping harder, increases the risk of errors and creates problems if HMRC ever enquires into your records.

Many UK banks offer free business current accounts for sole traders, including Starling, Monzo Business and Tide.

What records to keep

HMRC requires you to keep records of:

All sales and income (invoices, cash received, bank transfers)
All business expenses (receipts, bank statements, credit card statements)
VAT records (if VAT-registered)
Mileage logs (if claiming vehicle expenses)

You must keep these records for at least 5 years after the 31 January submission deadline for the relevant tax year.

Digital records

Since April 2024, if you are VAT-registered, you must keep digital records under Making Tax Digital. Even if you are below the VAT threshold, using accounting software to keep your records digitally saves time and reduces errors.

Allowable expenses

Claiming every legitimate business expense reduces your taxable profit and therefore your tax bill. Here are the main categories:

Home office costs

If you work from home, you can claim a proportion of your household costs:

Simplified method (flat rate):

Hours worked from home per month	Monthly flat rate deduction
25 to 50 hours	£10
51 to 100 hours	£18
101+ hours	£26

Actual cost method: Calculate the proportion of your home used for business and claim that percentage of:

Rent or mortgage interest
Council tax
Electricity, gas and water
Home insurance
Internet and phone (business proportion)

The flat rate is simpler but usually gives a smaller deduction. If you have a dedicated home office, the actual cost method typically saves more.

Travel and vehicle costs

You can claim for business travel, but not for commuting (travel between home and a regular place of work).

For your own vehicle:

Miles	Rate per mile
First 10,000 business miles	45p
Each mile over 10,000	25p

Alternatively, claim actual running costs (fuel, insurance, repairs, road tax) proportional to business use. You cannot switch between methods year to year for the same vehicle.

Other travel expenses:

Train and bus fares for business trips
Flights for client meetings
Taxis
Hotel accommodation for business trips
Subsistence (meals while travelling on business)

Professional costs

Professional indemnity insurance
Accountancy fees
Professional subscriptions (industry bodies, trade associations)
Training courses directly related to your current work (not courses to enter a new field)

Equipment and technology

Computer equipment (laptops, monitors, keyboards)
Software subscriptions (design tools, project management, accounting software)
Office furniture (desk, chair)
Phone (business proportion of contract cost)

If an item costs less than the Annual Investment Allowance threshold and is used wholly for business, you can deduct the full cost in the year of purchase. If it has mixed personal and business use, claim the business proportion.

Marketing and business development

Website hosting and domain names
Advertising (Google Ads, social media ads)
Business cards and stationery
Portfolio website costs

Financial costs

Bank charges on your business account
Interest on business loans
Credit card fees (business proportion)
Bad debts (invoices you have genuinely been unable to collect)

Self Assessment filing

Key dates

Deadline	What
5 April	Tax year ends
31 July	Second payment on account due
5 October	Deadline to register for Self Assessment (first year)
31 October	Paper return deadline
31 January	Online return deadline and balancing payment due
31 January	First payment on account for next year due

Payments on account

If your tax bill is over £1,000, HMRC requires you to make payments on account – advance payments towards next year’s tax bill. Each payment is 50% of the previous year’s tax liability, due on:

31 January (during the tax year)
31 July (after the tax year ends)

Any remaining balance (or overpayment) is settled with the balancing payment on the following 31 January.

This catches many new freelancers off guard. In your second year, you could face a bill for the full previous year’s tax plus 50% of next year’s estimated tax – effectively 150% of a normal year’s tax in one go.

What goes on your return

Your Self Assessment return includes:

Turnover (total income from freelancing before expenses)
Allowable expenses (broken down by category)
Net profit (turnover minus expenses)
Any other income (employment, savings interest, rental income, dividends)
Capital gains (if you sold assets at a profit)
Student loan repayments (if applicable)

VAT for freelancers

When to register

You must register for VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period. You can also register voluntarily below this threshold.

Should you register voluntarily?

Situation	Voluntary registration?
Most clients are VAT-registered businesses	Often yes – they can reclaim the VAT you charge
Most clients are consumers	Usually no – your prices effectively increase by 20%
You have significant input VAT (expenses with VAT)	Possibly – you can reclaim this VAT
Your turnover is well below £90,000	Probably not worth the admin unless other factors apply

If you do register, the Flat Rate Scheme can simplify your VAT accounting. You charge VAT at the standard rate but pay HMRC a lower fixed percentage of your gross turnover. The percentage depends on your business sector. For more detail, see our guide to VAT .

National Insurance

As a sole trader, you pay two types of National Insurance:

Class	Rate (2024/25)	How it works
Class 2	£3.45/week	Flat rate, payable if profits above £12,570
Class 4	6% on profits between £12,570 and £50,270; 2% above £50,270	Calculated on your Self Assessment return

Class 2 contributions count towards your State Pension entitlement. Even if your profits are below the threshold, you can pay voluntarily to protect your pension record.

Tax-efficient strategies

Use your personal allowance

The personal allowance for 2024/25 is £12,570. Your first £12,570 of income is tax-free. If you have no other income, make sure you are using this fully.

Pension contributions

Contributions to a personal pension reduce your taxable income. As a sole trader, you can contribute up to £60,000 per year (or 100% of your earnings, whichever is lower) and get tax relief.

If you are a basic rate taxpayer, the pension provider claims 20% tax relief automatically. If you are a higher rate taxpayer, you claim the additional relief through your Self Assessment return.

Timing your income and expenses

If you are close to a tax band threshold, you can sometimes manage your timing to stay in the lower band:

Delay invoicing a December project until January (next tax year)
Bring forward planned equipment purchases to increase expenses in the current year
Prepay annual subscriptions before the tax year ends

This is legitimate tax planning, not evasion. But be careful not to distort your accounts artificially.

Common mistakes freelancers make

Not setting aside money for tax – put 25-30% of every payment into a separate savings account
Missing the payments on account system – budget for the January and July payments
Forgetting to claim expenses – keep every receipt and log every business mile
Mixing personal and business finances – use a separate bank account
Not registering for VAT on time – monitor your rolling 12-month turnover
Keeping paper records only – use digital tools to make your life easier and prepare for MTD

Getting your tools right

As a freelancer, your accounting does not need to be complicated, but it does need to be accurate and complete. Using accounting software designed for UK sole traders and small businesses automates the tedious parts – bank feed categorisation, VAT calculations, expense tracking – so you can focus on the work that earns you money.