Self-Employments

Freelancer Tax Guide UK — Self-Employed Tax Explained Simply

Everything freelancers need to know about UK tax. Income tax, National Insurance, expenses, allowable deductions, and how to complete your Self Assessment.

Freelancing offers flexibility but requires understanding your tax obligations. Here’s your complete guide.

Tax Overview

What Freelancers Pay

Tax Who Pays
Income Tax On profits over £12,570
Class 2 NI If profits over £6,725
Class 4 NI On profits over £12,570
VAT If turnover exceeds £90,000

Tax Calculation Example

Freelancer with £40,000 Profit Amount
Profit £40,000
Personal Allowance -£12,570
Taxable income £27,430
Income Tax (20%) £5,486
Class 2 NI £179
Class 4 NI (6% on £12,570-£40k) £1,646
Total Tax/NI £7,311

Income Tax Rates 2025/26

Tax Bands

Band Income Rate
Personal Allowance £0-12,570 0%
Basic Rate £12,571-50,270 20%
Higher Rate £50,271-125,140 40%
Additional Rate Over £125,140 45%

Personal Allowance Taper

Income Over £100k Allowance Reduced
For every £2 over £1 less allowance
At £125,140 No Personal Allowance

National Insurance

Class 2 NI

Detail Amount
Weekly rate £3.45
Annual cost £179.40
Threshold Profits over £6,725
Now voluntary Below threshold

Class 4 NI

Profit Band Rate
£12,570-50,270 6%
Over £50,270 2%

NI Example

Profit £50,000 Calculation
Class 2 NI £179
Class 4 (6% on £37,700) £2,262
Total NI £2,441

Getting Started

Registration Timeline

Action Deadline
Register as self-employed By October 5th in second tax year
Best practice Register immediately
Penalties For late registration

How to Register

Step Action
1 Register for Self Assessment
2 Receive UTR (Unique Taxpayer Reference)
3 Set up Government Gateway
4 Keep records from day one

Allowable Expenses

Home Office

Expense How to Claim
Proportion of rent/mortgage interest Based on workspace
Proportion of utilities Gas, electric, water
Proportion of council tax Same method
Simplified method £6/week (£312/year)

Working from Home Calculation

Method Example
Rooms method 1 of 5 rooms = 20%
Area method 10 of 50 sqm = 20%
Hours method For shared spaces

Equipment and Technology

Expense Deductible
Computer Full cost or capital allowances
Software Full cost
Phone Business portion
Internet Business portion
Office furniture Full cost

Travel

Allowable Not Allowable
Travel to clients Home to regular workplace
Travel between sites Commuting
Hotels for business Personal travel
Meals (overnight only) Regular meals

Mileage Rates

First 10,000 Miles After 10,000
45p per mile 25p per mile
Or actual costs If higher

Professional Costs

Expense Example
Professional memberships Industry bodies
Training Relevant to work
Books/publications Work-related
Insurance Professional indemnity
Accountant fees Full cost

Marketing

Expense Deductible
Website costs Full cost
Business cards Full cost
Advertising Full cost
Portfolio Work-related

What You Can’t Claim

Non-Deductible

Expense Why Not
Own salary Drawings, not expense
Personal clothes Even if “work” clothes
Parking/speeding fines Penalties
Entertainment Except very limited
Food (unless overnight) Personal expense

Record Keeping

What to Keep

Record How Long
Invoices issued 5 years minimum
Receipts for expenses 5 years minimum
Bank statements 5 years minimum
Contracts Duration + 6 years

Systems

Method Pros
Accounting software Automated, reports
Spreadsheet Simple, cheap
Paper + box Minimum standard
Software Cost Best For
FreeAgent £19-38/month Full features
QuickBooks £15-30/month Growing businesses
Xero £15-47/month Popular choice
Wave Free Basic needs

Self Assessment

Key Dates

Date Deadline
April 5th Tax year ends
October 5th Register for new self-employment
October 31st Paper tax return
January 31st Online return + payment
July 31st Second payment on account

Payments on Account

What Amount
First payment (31 Jan) 50% of previous year
Second payment (31 July) 50% of previous year
Balancing payment Any remaining

Example Payment Schedule

Date Payment
Jan 31st 2026 Balance for 2024/25 + 50% for 2025/26
July 31st 2026 50% for 2025/26
Jan 31st 2027 Balance + new payments on account

VAT

Registration Threshold

Threshold Action
Turnover over £90,000 Must register
Turnover under £90,000 Optional
Deregistration threshold £88,000

Flat Rate Scheme

Benefit How It Works
Simpler accounting Fixed % of turnover
May keep difference Between collected and paid
Limited cost traders 16.5%

Standard VAT

Rate Applies To
20% Most goods/services
5% Some (energy)
0% Some (books, food)
Exempt Some services

Pension Contributions

Why Important

Factor Details
No employer pension Must arrange own
Tax relief At marginal rate
State Pension NI contributions count

Options

Option Details
Personal pension SIPP
Stakeholder pension Lower charges
Annual allowance Up to £60,000

Tax Relief

Example Benefit
£8,000 contribution £10,000 in pension
Higher rate taxpayer Claim additional 20%
Effective cost £6,000

IR35 and Contractors

What Is IR35?

Concept Meaning
Off-payroll rules Are you really employed?
Inside IR35 Pay tax like employee
Outside IR35 Normal self-employment

Determining Status

Factor Inside Outside
Control Client controls how You decide how
Substitution Must do personally Can send someone else
Mutuality Ongoing obligation Project by project

If Inside IR35

Consequence Impact
Client deducts tax At source
Limited company No tax advantage
Equivalent to employee For tax purposes

Tax-Saving Strategies

Legitimate Approaches

Strategy Benefit
Claim all valid expenses Reduce taxable profit
Pension contributions Tax relief + future income
Marriage Allowance If spouse low earner
ISA savings Tax-free growth

Timing Income

Strategy When
Defer invoicing If income spike
Accelerate expenses Before year end
Split income years Smooth tax bills

Getting Help

When to Use Accountant

Situation Benefit
Turnover over £30-50k Worth the cost
Complex arrangements IR35, multiple sources
VAT registered Quarterly returns
First year Set up properly

Accountant Costs

Service Typical Cost
Annual accounts £200-500
Tax return £150-300
Bookkeeping £50-150/month
Full service £100-300/month

Summary

Key Deadline Date
Tax year end April 5th
Register October 5th
Paper return October 31st
Online + pay January 31st
Payment on account July 31st
Key Rate Amount
Basic Income Tax 20%
Higher Income Tax 40%
Class 2 NI £3.45/week
Class 4 NI 6% / 2%
VAT threshold £90,000