Freelancer Tax in the UK: Self-Assessment, VAT & Invoicing (2026)

UK freelancers typically choose between two structures:

Sole trader — simplest. Register as self-employed with HMRC, file annual Self-Assessment, pay Income Tax + National Insurance on profits. Personal liability for debts.

Limited company (Ltd) — separate legal entity. Pay yourself via salary + dividends. Corporation Tax on profits (19% small profits, up to 25% on £250K+). Limited personal liability. More admin overhead — annual accounts, Corporation Tax return.

Breakeven for going Ltd: roughly £30K-£40K/year of profit, depending on circumstances. Below that, sole trader is usually simpler and more tax-efficient.

UK Income Tax is progressive, with a personal allowance:

• £0–£12,570 — Personal Allowance (0% — tax-free)
• £12,571–£50,270 — Basic rate (20%)
• £50,271–£125,140 — Higher rate (40%)
• £125,141+ — Additional rate (45%)

Personal Allowance reduces by £1 for every £2 earned over £100,000 — fully tapered at £125,140.

Scotland has different rates and bands (starter, basic, intermediate, higher, advanced, top — ranging 19% to 48%).

Self-employed UK freelancers pay two classes of National Insurance:

Class 2 NIC — flat-rate, £3.45/week if profits over £6,725 (small profits threshold). From April 2024 reform, Class 2 became voluntary for many — paid only to maintain NI record for benefits.

Class 4 NIC — based on profits:

• 6% on profits between £12,570 and £50,270
• 2% on profits above £50,270

NICs are paid alongside Income Tax through Self-Assessment.

VAT registration becomes mandatory when:

• Your taxable turnover exceeds £90,000 in any 12-month rolling period, OR
• You expect it to exceed £90,000 in the next 30 days

Below the threshold, you can register voluntarily — useful if your clients are VAT-registered businesses (they can reclaim your VAT) and you have significant input VAT on expenses.

Standard VAT rate: 20%. Reduced 5% (energy bills, child car seats). Zero-rated 0% (most food, books, children's clothing). Exempt (financial services, education, healthcare).

VAT returns are quarterly via Making Tax Digital (MTD) — must use HMRC-recognized software, no paper or manual filings.

Tax year: April 6 to April 5 of the following year (e.g., 2026/27 = April 6 2026 to April 5 2027).

Key deadlines:

• October 5 following the tax year — register for Self-Assessment if first year self-employed
• October 31 — paper return deadline (rare nowadays)
• January 31 following the tax year — online return + balancing payment + first payment on account
• July 31 — second payment on account

Payments on account: if last year's tax was over £1,000, HMRC requires advance payments toward this year's bill — 50% by Jan 31, 50% by July 31. Adjusted up/down via the final Self-Assessment.

Late filing: £100 fixed penalty + daily fines after 3 months.

Non-VAT-registered freelancers need only basic info on invoices. VAT-registered freelancers must include (HMRC requirements):

• "Invoice" or "Tax invoice" clearly marked
• Unique sequential invoice number
• Your business name, address, and VAT registration number
• Customer name and address
• Date of issue
• Date of supply (tax point)
• Description of goods/services
• Quantity, unit price, total per line
• Rate of VAT (20% / 5% / 0%) and amount of VAT
• Total amount excluding VAT, total VAT, total including VAT
• Currency (if not GBP, include exchange rate)

Keep invoices and records for 6 years (HMRC's audit window).

Deductible "wholly and exclusively" for business:

• Office costs — coworking, rent, utilities (proportional for home office)
• Home office — Simplified Expenses flat rate (£10–£26/month depending on hours) OR actual costs
• Equipment — laptops, software, tools (Annual Investment Allowance up to £1M)
• Travel — 45p/mile (first 10,000 miles), 25p thereafter; public transport tickets
• Phone & internet — business-use percentage
• Professional services — accountant, legal, business insurance
• Marketing — website, advertising
• Training — directly related to current trade (not new ventures)
• Subsistence — meals on overnight business trips

For home offices, you can either use Simplified Expenses or calculate the actual proportion of rent, utilities, and council tax.

MTD for VAT has been mandatory since April 2022 for all VAT-registered businesses. You must:

• Keep digital records of all sales and purchases
• Submit VAT returns through MTD-compatible software (HMRC's online VAT portal closed)
• File quarterly

MTD for Income Tax Self-Assessment (MTD ITSA) rolls out from April 2026:

• April 2026 — businesses/landlords with income over £50,000
• April 2027 — those over £30,000
• April 2028+ — under £30,000 (timing TBD)

MTD ITSA requires quarterly digital updates + final declaration. Most freelancers will need MTD-compatible software by April 2027.