How much should I set aside for tax as a freelancer?

Thirty per cent of profit in your first year of trading, then around 25% once payments on account are running. On £48,000 of profit in 2026/27 the actual liability is £7,086 of Income Tax plus £2,125.80 of Class 4 National Insurance, which is 19.2% of profit. The reason 20% is not enough is the first January: you pay that whole bill plus a payment on account of half of it again, so £13,817.70 leaves your account on a single day. Move the money the day each invoice is paid, into a separate account you do not hold a card for.

When do I have to register as self-employed?

By 5 October following the end of the tax year in which your gross trading income first exceeded the £1,000 trading allowance. So if you started freelancing in June 2026, that tax year ends on 5 April 2027 and you must register by 5 October 2027. Registering earlier costs nothing and removes the risk entirely. You also need to register even below £1,000 if you want to claim a trading loss, pay voluntary Class 2 National Insurance to protect your State Pension record, or claim Tax-Free Childcare or Maternity Allowance based on self-employed income.

Why is my first tax bill so much bigger than I expected?

Payments on account. On 31 January you settle the tax year that ended the previous April in full, and at the same moment you pay half that amount again towards the year you are currently trading in. A second instalment of the same size follows on 31 July. It feels like being charged one and a half times, and in the first year it effectively is, because you are catching up on a year of untaxed income while starting to pay ahead. From year two onwards the January payment is only the balancing figure, which is why the 30% habit can ease back to 25%.

Do payments on account ever not apply?

Two exemptions. If your previous year's tax bill came to less than £1,000, you pay the balance and nothing on account. And if more than 80% of your tax for the year was already collected at source, typically through a PAYE code because you also have a job, payments on account are not required either. That second one matters for anyone freelancing alongside employment. Neither exemption removes the balancing payment itself, so the 31 January deadline still needs the money behind it — the exemption only removes the extra instalments on top.

Does Making Tax Digital apply to me?

It depends on your qualifying income, which is turnover from self-employment and property before expenses, not profit. Over £50,000 in the 2024/25 tax year meant starting from 6 April 2026. Over £30,000 in 2025/26 means starting from 6 April 2027, and over £20,000 in 2026/27 means starting from 6 April 2028. Once you are in, you keep digital records and send quarterly updates from compatible software instead of filing once a year. The practical change is that bookkeeping becomes a monthly routine rather than a January event.

What can I do about a client who will not pay?

Work through it in order rather than jumping to the end. A polite reminder a day after the due date clears most of them, because the invoice has simply been missed. A week later, a second one that states the amount, the original due date and a payment date. After that, a formal written demand referencing your agreed terms. Under the Late Payment of Commercial Debts legislation you can charge statutory interest and a fixed sum for recovery costs on a business-to-business debt. Small claims are a genuine option for smaller sums, but the real fix is a deposit up front on the next job.

The Freelancer's Financial Survival Guide

Why freelance finances feel like feast or famine

Freelance income is naturally lumpy — some months bring in several clients' worth of work, others bring in very little. That's largely unavoidable, and it's the single biggest difference between managing money as a freelancer and managing it as an employee with a fixed monthly salary. What makes it harder to manage isn't the lumpiness itself, though — it's not having a system that accounts for it. Without one, a good month gets spent as if every month will be that good, and a quiet month becomes a genuine crisis rather than an expected part of the pattern.

Setting aside tax as you go

Unlike an employee, nobody is deducting tax from a freelancer's income before it lands in the bank. That means the responsibility — and the temptation to treat gross income as spendable income — sits entirely with you. The single most effective habit for avoiding a nasty tax bill surprise is moving a percentage of every payment you receive into a separate account the moment it arrives, rather than working out what you owe once a year when the Self Assessment deadline is looming. Treat the tax portion of every invoice as money that was never really yours to spend, and you remove one of the biggest financial stresses of freelance life before it has a chance to build up.

The percentage is not a matter of taste — you can calculate it. For a sole trader in the 2026/27 tax year, the Personal Allowance is £12,570 and Income Tax runs at 20% to £50,270, 40% to £125,140 and 45% above. On top of that, Class 4 National Insurance is 6% on profits between £12,570 and £50,270 and 2% above £50,270. Class 2 is £3.65 a week, but it is treated as paid automatically once profits reach £7,105, so most working freelancers have nothing extra to pay.

Worked example: what £48,000 of profit actually costs

Take a freelancer whose first full year produces £48,000 of taxable profit. Illustrative figures, but the tax arithmetic is exact.

Income Tax: £48,000 less the £12,570 Personal Allowance leaves £35,430, taxed at 20% = £7,086.
Class 4 National Insurance: the same £35,430 at 6% = £2,125.80.
Class 2: profits are above £7,105, so it is treated as paid. Nothing to find.
Total tax and NI: £9,211.80, which is 19.2% of profit.

So 20% set aside covers it? Not in the first year, because of payments on account. On 31 January after that first tax year you owe the whole £9,211.80 plus a first payment on account of half that figure towards the next year — £4,605.90 — making £13,817.70 due on a single day. A second payment of £4,605.90 follows on 31 July.

A freelancer who diligently set aside 25% would have £12,000 and be £1,817.70 short in the worst possible week of the year. At 30% they would have £14,400 and clear it with room to spare. That is why the honest answer to "what should I put aside" is 30% of profit in your first year of trading, dropping to around 25% once payments on account are running and the January bill is just the balancing figure. Our self-employed tax calculator gives you your own number in under a minute.

Two exemptions are worth knowing. Payments on account are not required if your previous year's bill was under £1,000, or if more than 80% of your tax was already collected at source — through a PAYE code, for instance, if you also have a job.

Building a buffer for the quiet months

Because income is irregular, a cash buffer matters more for freelancers than almost anyone else. The goal isn't a specific number pulled from a generic rule — it's having enough set aside that a slow month, or a slow-paying client, doesn't turn into a genuine emergency. Building this gradually during better months, rather than trying to create it from nothing when things are already tight, is far more achievable and far less stressful.

Invoicing discipline: the biggest lever you control

A vague or late invoice is one of the easiest ways to delay your own payment. Send it the moment work is delivered, not whenever you get round to it — every day it sits unsent adds a day to how long you'll wait to get paid. Make sure it's unambiguous: what the work was, the amount, the due date, and how to pay, all clearly laid out, so there's no reason for it to sit in someone's inbox waiting for a query to be resolved. Agree payment terms before the work starts, not after the invoice is sent — due on receipt, 14 days, 30 days, whatever suits the size and length of the job — so there's no ambiguity or awkward negotiation later. For larger pieces of work, a deposit up front does two useful things: it improves your cashflow at the start of the job rather than the end, and it filters out clients who were never going to be reliable payers.

Chasing without dreading it

Most freelancers dread chasing a late invoice, which is exactly why so many leave it too long. A short, polite reminder sent a day or two after the due date, treated as routine rather than confrontational, clears up most late payments quickly — in a lot of cases it's genuinely just been missed rather than deliberately delayed. Having a simple, consistent process (a reminder at the due date, a follow-up a week later) takes the awkwardness out of it, because it stops being a personal conversation and starts being how you always handle invoicing.

Knowing where you actually stand

Getting paid on time is only half the picture — knowing where you stand at any given point matters just as much. That means being able to see, without having to dig, which invoices are outstanding, how long they've been outstanding, and roughly what's coming in over the next month or two. A lot of freelancers only really look at this properly once a quarter or once a year, which means slow-paying clients or a quietly building cashflow gap can go unnoticed for far longer than it should.

The dates that matter, and the ones that catch people out

Freelance admin has very few deadlines, which is precisely why they get missed. Put these five in a calendar now.

5 October following the end of the tax year in which you started: the deadline to register for Self Assessment. You must register once your gross trading income exceeds the £1,000 trading allowance.
31 January: online filing deadline for the tax year that ended the previous 5 April, plus the balancing payment and the first payment on account.
31 July: the second payment on account.
Monthly, on the first: your rolling 12-month turnover check. Cross £90,000 of VAT-taxable turnover in any rolling twelve months and VAT registration becomes compulsory.
Quarterly, once Making Tax Digital applies to you: see below.

Making Tax Digital for Income Tax

This is the change most freelancers have not yet absorbed, and it replaces one annual return with quarterly updates from compatible software. It is phased in by qualifying income — turnover from self-employment and property before expenses, not profit.

Over £50,000 in the 2024/25 tax year: started 6 April 2026.
Over £30,000 in the 2025/26 tax year: starts 6 April 2027.
Over £20,000 in the 2026/27 tax year: starts 6 April 2028.

The practical consequence is that shoebox bookkeeping stops working. Records have to be kept digitally and submitted four times a year, so the freelancer who reconciles everything in a panic each January has to change how they work. If you are not sure which wave you are in, our Making Tax Digital checker takes four questions, and the fuller Making Tax Digital guide covers what changes in practice.

Sole trader or limited company

Both structures work well for freelancers, but each carries different responsibilities and tax treatment. As a sole trader, you and the business are legally the same thing, with lighter admin and everything taxed as personal income through Self Assessment. As a limited company, the company is a separate legal entity: Corporation Tax is 19% on profits up to £50,000 and 25% above £250,000, with Marginal Relief between, and you draw a combination of salary and dividends personally.

The dividend side has become less generous. For 2026/27 the dividend allowance is £500, and dividend tax is charged at 10.75% for basic rate taxpayers, 35.75% at higher rate and 39.35% at additional rate. Incorporating also brings a confirmation statement, annual accounts at Companies House, a Corporation Tax return, and directors' duties that do not exist for a sole trader. There's no universally right answer; it depends on your income level, your plans and your appetite for the extra structure. Our sole trader versus limited company guide works through the comparison properly, and this post covers the point at which switching starts to make sense.

IR35: relevant if you also contract

If some or all of your work involves longer engagements through an agency or directly for a client's business — rather than short, discrete freelance projects for multiple clients — it's worth understanding IR35, the rules that determine whether that engagement should be treated as employment for tax purposes rather than genuine self-employment. The distinction usually comes down to things like how much control the client has over how, when and where you work, whether you can send someone else to do the work in your place, and whether you carry genuine business risk. Getting this wrong in either direction has real financial consequences, so if a chunk of your work looks more like a long-term placement than a freelance project, it's worth getting a proper read on your status rather than assuming. Note that IR35 bites on limited company and partnership engagements — a straightforward sole trader is outside its scope, though the client can still carry a liability if they have treated an employee as self-employed. Our explainer on inside and outside IR35 sets out what the three main tests actually look at.

Where Buzz fits in

We support freelancers working as sole traders and through limited companies, with fixed monthly packages, FreeAgent included for clearer visibility over income and expenses, and a dedicated accountant who understands freelance work rather than treating you like a generic small business. Have a look at our freelancer accounting page, or book a free discovery call and we'll talk through your income pattern and what support would actually help.

The freelancer's financial survival guide