Computer Repair Technicians — Self-Employed Tax Guide

If you can diagnose a blue screen of death, replace a cracked laptop screen, remove malware, or upgrade a hard drive to an SSD, you have a skill that people will happily pay for. Self-employed computer repair technicians are in constant demand — from families whose laptops have ground to a halt, to small businesses that cannot afford a full-time IT department.

But while you are busy fixing other people's tech problems, it is important not to neglect your own business admin. This guide covers everything self-employed computer repair technicians in the UK need to know about tax, expenses, and keeping HMRC happy.

Getting Started — Registering as Self-Employed

If you are earning more than £1,000 per year from computer repair work, you need to register as self-employed with HMRC. This applies whether you are doing it full-time or as a side hustle alongside employment.

Registration is done online and takes about ten minutes. You will receive a Unique Taxpayer Reference (UTR) number and will need to file a Self Assessment tax return each year by 31 January following the end of the tax year.

Your taxable profit is your income minus allowable business expenses. The personal allowance is £12,570 — no income tax on the first £12,570 of total income. Above that, the basic rate is 20%. If your computer repair work is alongside employment, your employment income and self-employment profits are combined to determine your tax band.

For a detailed breakdown, see our guide on how much tax you will pay as a sole trader.

Employment vs Self-Employment

Before we go further, it is worth confirming your status. If you work for a single computer repair shop, follow their schedule, use their equipment, and they pay you a regular wage, you are likely an employee, not self-employed. Your employer should handle your tax through PAYE.

You are more likely to be genuinely self-employed if you:

• Have multiple clients or customers.
• Set your own hours and rates.
• Provide your own tools and equipment.
• Can send a substitute to do the work in your place.
• Invoice for your services rather than receiving a salary.

Most independent computer repair technicians — those running their own business, visiting customers' homes, or operating from a workshop — are clearly self-employed.

Allowable Expenses for Computer Repair Technicians

Here is the good news. Self-employed computer repair technicians have a solid range of expenses to claim, which reduces the amount of tax you pay.

Tools and Equipment

• Screwdrivers and tool kits — Precision screwdriver sets, anti-static wrist straps, spudgers, and specialist repair tools.
• Diagnostic equipment — Multimeters, POST cards, cable testers, and hard drive docking stations.
• Power supplies and testing equipment — Bench power supplies and component testers.
• Soldering equipment — Soldering irons, hot air stations, and solder.

Software and Licensing

• Operating systems — Windows licences purchased for customer installations.
• Antivirus and security software — Licences for malware removal tools, antivirus suites, and security utilities.
• Diagnostic software — Hard drive testing utilities, benchmarking tools, and data recovery software.
• Remote access tools — TeamViewer, AnyDesk, or similar software for remote support.
• Office software — Microsoft 365 or equivalent for your business admin.
• Accounting software — Tools like Accounted for managing your bookkeeping and tax.

Parts and Components

• Replacement parts — RAM, hard drives, SSDs, screens, keyboards, batteries, fans, thermal paste, and cables purchased for customer repairs.
• Consumables — Compressed air, isopropyl alcohol, thermal pads, and cleaning supplies.

Note: Parts purchased specifically for a customer repair are a cost of sale, not a general expense. The distinction does not affect your tax calculation (both reduce your taxable profit), but it helps you understand your true margins.

Vehicle and Travel

• Mileage — If you visit customers at their homes or businesses, you can claim the HMRC approved mileage rate of 45p per mile for the first 10,000 business miles, then 25p per mile. Keep a mileage log of each journey.
• Parking — Parking fees at customer locations.
• Public transport — Bus, train, or tube fares for business travel.

See our mileage guide for the self-employed for more detail.

Home Office and Workshop

• Use of home — If you work from home (doing repairs, running admin, or providing remote support), you can claim a proportion of your household costs. This includes a share of electricity, gas, council tax, broadband, mortgage interest or rent, and home insurance.
• Workshop or premises rent — If you rent a dedicated workshop or shop unit, the full rent is a business expense.
• Broadband and phone — The business proportion of your internet and phone bills. For a tech business, this is often a significant proportion.
• Electricity — Running computers, monitors, and test equipment uses electricity, and the business proportion is claimable.

Our complete expenses guide explains the various methods for calculating home office costs.

Marketing and Client Acquisition

• Website — Domain registration, hosting, design, and SEO costs.
• Google Ads and social media advertising — Online marketing to attract local customers.
• Business cards and flyers — Printed marketing materials.
• Listings and directories — Google Business Profile, Yell, Checkatrade, or local directories.
• Branded clothing — Polo shirts or t-shirts with your business name and logo (if used exclusively for work).

Insurance

• Public liability insurance — Covers you if you accidentally damage a customer's property.
• Professional indemnity insurance — Covers claims arising from errors in your work (e.g., data loss during a repair).
• Tools and equipment insurance — Covers your tools and stock.
• Vehicle insurance — If you use a vehicle for business, the business proportion of your insurance.

Professional Development

• Training and certifications — CompTIA A+, Microsoft certifications, Apple certifications, and other IT qualifications.
• Course fees — Online courses, in-person training, and exam fees.
• Technical books and subscriptions — Reference books, online tutorials, and technical documentation.
• Professional memberships — Membership of IT professional bodies.

Other

• Waste disposal — WEEE (Waste Electrical and Electronic Equipment) disposal costs for old parts and equipment.
• Data protection — ICO registration fee if you handle personal data (which you almost certainly do).
• Bank charges — Fees on your business bank account.

Pricing Your Services

Getting your pricing right is crucial. Common approaches include:

• Fixed fees — A set price for common jobs (screen replacement, virus removal, data recovery). Clear and easy for customers to understand.
• Hourly rate — Typically £30-60 per hour for independent technicians, depending on your location and specialisation.
• Callout fee plus hourly — A minimum charge for visiting a customer, plus an hourly rate for the work.
• Parts plus labour — Charge for parts at cost (or with a markup) plus your labour rate.

Whatever model you use, make sure your pricing covers not just your time but also your overheads, travel, and the tax you will owe on your profits.

National Insurance

You will pay Class 2 and Class 4 National Insurance on your self-employed profits, in addition to income tax. Class 2 is a small flat-rate contribution, and Class 4 is calculated as a percentage of your profits. See our National Insurance guide for sole traders for the current rates and thresholds.

VAT for Computer Repair Businesses

The VAT registration threshold is £90,000. If your turnover exceeds this in any rolling 12-month period, you must register for VAT and charge 20% on your services.

Most sole trader computer repair technicians will be below this threshold. However, if you also sell refurbished computers, parts, or accessories, this revenue counts towards your VAT turnover alongside your repair income.

If you are approaching the threshold, our VAT registration threshold guide covers the process and options.

Data Protection and GDPR

Computer repair technicians inevitably handle customers' personal data — you see their files, emails, photos, and browsing history. You have a legal obligation under the UK GDPR and Data Protection Act 2018 to:

• Handle customer data responsibly.
• Only access data necessary for the repair.
• Not copy, share, or misuse customer data.
• Register with the Information Commissioner's Office (ICO) — the registration fee (typically £40-60 per year for small businesses) is a deductible expense.

Taking data protection seriously is not just a legal requirement — it is essential for building customer trust.

Record Keeping

HMRC requires you to keep business records for at least five years. For computer repair technicians, this means:

• Income records — Invoices issued, payment received, and a record of each job.
• Expense receipts — Parts purchases, software licences, tool purchases, and all other business expenses.
• Mileage log — Date, destination, purpose, and miles driven for each business journey.
• Bank statements — Showing business income and expenditure.

With Accounted, you can issue invoices, photograph receipts, and track your income and expenses all in one place. Penny helps categorise your transactions automatically, so you spend less time on admin and more time earning. It is the kind of system that makes sense for a technician who would rather be elbow-deep in a motherboard than buried in a spreadsheet.

Making Tax Digital

From April 2026, sole traders with income above £50,000 will need to comply with Making Tax Digital for Income Tax, which means keeping digital records and submitting quarterly updates to HMRC. If your business is growing towards this level, getting set up with MTD-compatible software now will save headaches later.

Common Mistakes to Avoid

• Not registering — If you are earning over £1,000, register. HMRC catches up with unregistered traders through bank records, platform data, and tip-offs.
• Mixing personal and business finances — Use a separate bank account for your business transactions.
• Not invoicing properly — Every job should have a clear invoice, even for cash payments.
• Forgetting to claim expenses — Every legitimate expense reduces your tax. Do not leave money on the table.
• Not setting aside money for tax — A good rule is to set aside 25-30% of your net profit for your tax bill.

Building Your Repair Business

A few tips for growing as a self-employed computer repair technician:

• Google Business Profile — Essential for local search visibility. Encourage happy customers to leave reviews.
• Word of mouth — The best marketing in this business. Do great work, and referrals will follow.
• Specialise — Data recovery, Mac repairs, or business IT support can command higher rates than general consumer repairs.
• Offer remote support — Expand your reach beyond your local area and reduce travel time.
• Recurring contracts — Monthly maintenance agreements with small businesses provide predictable income.

Accounted helps UK sole traders stay on top of their bookkeeping and tax. Start your free 30-day trial at getaccounted.co.uk.

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Related reading:

• Sole Trader Expenses — The Complete List
• How to Register as Self-Employed with HMRC
• National Insurance for Sole Traders

Related Reading

• Security Guards and Door Supervisors — Self-Employed Tax Guide
• Event Planners and Wedding Coordinators — Freelance Tax Guide
• Sports Physiotherapists — Freelance Tax Guide

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