Allowable expenses, the trading allowance, home-office costs, National Insurance, VAT and MTD explained for UK self-employed proofreaders and copy-editors.
A proofreader's tax position looks deceptively simple. There is no van, no stock, no expensive tooling, just you, a screen and a sharp eye. That simplicity is real, but it hides the one thing proofreaders consistently get wrong: tracking income. A working proofreader might invoice a publisher for a 90,000-word manuscript, run a rolling per-page arrangement with an agency, take a one-off job direct from a self-publishing author through PayPal, and pick up a fixed-fee thesis from a postgraduate student. Lots of small payments land from many sources, often late and sometimes in different currencies, and that fragmentation is where the figures slip.
This guide is built around how proofreaders and copy-editors actually earn and spend: the trading allowance for those starting out, the home-office and software costs that make up almost all of your deductions, how profit is taxed, National Insurance, VAT and the move to Making Tax Digital. Get the recording right as each fee arrives and the annual return becomes a formality.
As a sole trader you pay Income Tax on profit, which is your total proofreading income minus allowable expenses. For 2025/26 the personal allowance covers the first GBP 12,570, then you pay 20% to GBP 50,270, 40% to GBP 125,140 and 45% above, with the personal allowance tapering away between GBP 100,000 and GBP 125,140 to create an effective 60% band. Class 4 National Insurance is 6% on profit between GBP 12,570 and GBP 50,270 and 2% above, while Class 2 NIC is settled through Self Assessment.
Scottish proofreaders pay Scottish Income Tax on their profit through six bands (19%, 20%, 21%, 42%, 45% and a 48% top rate) and carry an S-prefixed tax code, while National Insurance stays UK-wide. Welsh proofreaders have a C-coded tax code at rates currently matching the rest of the UK. If your code looks wrong, perhaps because a part-time PAYE job or an old client arrangement is distorting it, run it through the tax code checker.
Many proofreaders begin part-time, fitting jobs around employment, study or caring responsibilities. The GBP 1,000 trading allowance is built for exactly this. If your gross self-employed income from all freelance work is GBP 1,000 or less in a tax year, it is tax-free and you do not need to register for Self Assessment for it. Cross GBP 1,000 and you must register and report the full amount.
Once you are over the threshold you have a choice each year. You can deduct the flat GBP 1,000 trading allowance from your income instead of working out actual expenses, which suits a proofreader with very low costs. Or you can deduct your real allowable expenses if they come to more than GBP 1,000. You cannot do both, so total your costs and pick whichever leaves the lower profit. A proofreader working from an existing laptop with a single style-guide subscription often does better claiming the GBP 1,000; one who has just bought a new machine, a second monitor and several software licences does better claiming actuals.
An expense is allowable when it is incurred wholly and exclusively for the business. For a proofreader the list is dominated by home-office, software and reference costs rather than heavy equipment, but the small items add up across a year.
| Expense | What qualifies | Notes |
|---|---|---|
| Computer and peripherals | Laptop, second monitor, keyboard, ergonomic chair and desk | Usually claimed in full via the Annual Investment Allowance |
| Editing software | PerfectIt, macros, PDF mark-up tools, reference-management and grammar apps | Subscriptions are fully deductible |
| Reference materials | Dictionaries, style manuals (New Hart's Rules, Oxford, house style guides), specialist glossaries | Must relate to your proofreading work |
| Home-office costs | HMRC flat-rate working-from-home allowance, or a fair proportion of heat, light, broadband, rent or mortgage interest | Choose the larger fair deduction |
| Website and marketing | Freelance website, domain, directory listings, business cards | Fully deductible running costs |
| Professional membership | CIEP (Chartered Institute of Editing and Proofreading) and similar bodies | Allowable where relevant to the trade |
| Training and CPD | Courses that develop your existing proofreading and editing skills | Training into a brand-new trade is not allowable |
| Travel | Train, mileage and accommodation for client meetings or in-house editing days | Ordinary commuting is not allowable |
| Phone and broadband | The business proportion of your line and mobile | Exclude private use |
| Accountancy and bank fees | Bookkeeping, Self Assessment, business banking | Fully deductible |
Almost every proofreader works from home, so this is usually the largest single deduction. You can use HMRC's simplified flat rate based on the hours you work at home each month, which is quick and needs no receipts, or you can claim an actual proportion of household running costs (heat, light, broadband, and a share of rent or mortgage interest) based on the rooms used and time spent working. A full-time home-based proofreader often gets a noticeably larger deduction from the actual-cost method, so it is worth doing the sum both ways once and using the winner.
Proofreading equipment is modest, but a new laptop, a colour-accurate second monitor for on-screen mark-up, a printer for paper proofs, and an ergonomic chair and desk are all genuine business assets. These are normally claimed in full in the year of purchase through the Annual Investment Allowance rather than spread over several years. Keep the invoices and, where an item is used privately too, claim only the business proportion.
The private share of dual-use broadband, phone and devices must be excluded. Books you read for pleasure are not reference materials. Everyday clothing is never allowable, even something smart bought for a publisher meeting. There is no protective clothing or PPE in proofreading, so ignore advice aimed at trades that have it. And the cost of getting set up before your proofreading trade has actually started is treated as pre-trading expenditure, claimed once you begin trading rather than lost.
Plenty of proofreaders combine work, and the streams are not all taxed the same way. Use the multiple-income tax calculator to see how they stack on top of each other.
| Income type | How it is usually taxed | Watch out for |
|---|---|---|
| Publisher and agency proofreading fees | Self-employment trading income | Record the gross fee even when paid late or via PayPal |
| Per-page or per-1,000-word jobs | Trading income | Add up small invoices carefully; they are easy to lose |
| Direct work for authors and students | Trading income | Cash and PayPal jobs still count and must be recorded |
| A PAYE day job | Employment income, taxed at source | Your tax code may already use your personal allowance |
| Teaching or assessing editing courses | Trading income (or PAYE if employed) | Travel to teach is deductible; commuting is not |
The recurring mistake is assuming the PAYE personal allowance also shelters the freelance trade. If a salaried job already uses your GBP 12,570 allowance, every pound of proofreading profit is taxed from the basic rate up, so set money aside accordingly rather than assuming the first slice is tax-free.
For a proofreader, the income you forget to record costs more than the expenses you forget to claim. Capture every fee as it lands, however small, and the return writes itself.
Because proofreading income is made of many small, irregular payments, record-keeping is the heart of getting your tax right. The accruals basis means a job you finished and invoiced in March belongs in that tax year even if the client pays in April, so date your income to when it was earned, not just when the money arrived. Keep a simple running log of every invoice raised, its gross value, the platform or client, and the date paid, plus a folder of expense receipts and software invoices. Separating business banking from personal spending makes the whole exercise far quicker and removes the temptation to overlook a PayPal payment that never touched your main account.
Take a home-based proofreader with a mix of publisher contracts, agency per-page work and a few direct author jobs, totalling GBP 32,000 of income for the year.
Income: GBP 32,000 (publisher contracts GBP 17,000, agency per-page work GBP 11,000, direct author and student jobs GBP 4,000)
Allowable expenses:
Taxable profit: GBP 32,000 minus GBP 4,700 = GBP 27,300
Income Tax: GBP 27,300 minus GBP 12,570 = GBP 14,730 at 20% = GBP 2,946
Class 4 NIC: GBP 14,730 at 6% = GBP 884
Total tax and NIC: GBP 3,830 for the year, before any Class 2 NIC due. Run the same figures through the sole trader tax calculator to sanity-check your own numbers and to see the effect of setting aside a percentage of each invoice as it arrives.
You must register for VAT once taxable turnover exceeds GBP 90,000 in any rolling 12-month period, which most solo proofreaders never approach. If you do, and your clients are mainly VAT-registered publishers, agencies or businesses, registration is relatively painless because they reclaim the VAT you charge and you reclaim VAT on equipment and software. A proofreader who works mainly for individuals, such as self-publishing authors or students who cannot reclaim VAT, should think harder, because adding VAT to those prices either eats your margin or pushes your fees up. Voluntary registration only makes sense when your customers can reclaim the tax.
Making Tax Digital for Income Tax Self Assessment replaces the once-a-year return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit:
For a proofreader this is a genuine change of habit. Instead of pulling a year of scattered fees together each January, you record each invoice digitally as it lands and send HMRC a summary every quarter. The upside is that the many small, multi-source payments that make proofreading returns fiddly become far easier to manage when captured continuously rather than reconstructed from memory and bank statements. Our guide to MTD for sole traders walks through what the quarterly rhythm looks like in practice.
Not registering once over GBP 1,000. The trading allowance is a threshold, not a free pass at any level. Cross it and you must register for Self Assessment, even if proofreading is a sideline.
Losing track of small jobs. A proofreader's income is made of many modest invoices and direct PayPal or cash payments that are easy to miss. Every one is taxable and must be recorded.
Dating income to the payment, not the work. Under the accruals basis a job finished and invoiced in March belongs in that tax year even if it pays in April.
Claiming the wrong home-office method. Defaulting to the flat rate without checking actual costs can cost a full-time home worker a meaningful deduction. Do the sum both ways.
Assuming the PAYE allowance covers freelance income too. If a day job already uses your personal allowance, your proofreading profit is taxed from the basic rate up, so set aside more than you expect.
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