Going Freelance in the UK: A First-Year Checklist

Going freelance in the UK is exciting, but the first year comes with a long list of things nobody tells you about until a deadline arrives. This checklist breaks your first year into stages, from the weeks before you leave your job to your first Self Assessment return, so you can tick things off calmly. It is general information, not tax or financial advice. Rates and thresholds change every tax year, so check GOV.UK, HMRC or an accountant for your own situation.

A smiling man in a black t-shirt working on a laptop at a clean white desk — Your first freelance year goes better when the admin is set up before the work rushes in.

Key takeaways

Build a cash buffer before you go full-time, because freelance income rarely arrives evenly.
Register for Self Assessment once you earn more than £1,000 from self-employment, by 5 October after the tax year you started.
Set aside money for tax from every payment, and be ready for payments on account after your first return.
Use simple contracts and clear invoices, and know your rights if clients pay late.
Replace the benefits a job gave you: pension, sick pay cover and insurance.

When you are employed, your employer quietly handles tax, National Insurance, pension contributions and sick pay. When you go freelance, every one of those becomes your job. None of it is difficult on its own, but the pieces are easy to forget when you are busy winning and delivering work. Use the stages below as a running checklist through your first 12 months.

Before you leave your job

The months before you go freelance are the best time to prepare, because you still have a steady salary.

Build a buffer. Save enough to cover several months of personal and business costs. Freelance payments can take weeks to arrive, and the first few months are often quieter than expected.
Check your contract. Look at notice periods and any restrictions on working for your employer's clients after you leave.
Line up early clients. Talk to your network, former colleagues and potential clients before your last day.
Think about finance you may need. If you plan to apply for a mortgage soon, be aware that lenders often want proof of self-employed income, sometimes for two years. Timing matters.
Decide on your structure. Most freelancers start as sole traders. Contractors whose clients expect a limited company should research that option, including the IR35 rules, before they start.

Pro tip

Before you hand in your notice, try living on the income you expect from freelancing for a couple of months and save the difference. It tests your budget and builds your buffer at the same time.

Your first month: get set up properly

In your first few weeks, focus on the foundations. They take little time now and save a lot of time later.

Register with HMRC. If you will earn more than £1,000 from self-employment in the tax year, register for Self Assessment. The deadline is 5 October after the end of the tax year in which you started, but registering early means you get your Unique Taxpayer Reference in good time.
Open a separate bank account. Sole traders are not legally required to have one, but a separate account makes bookkeeping far easier, and some banks require a business account for business use.
Open a tax savings pot. A separate savings account where you move money for tax as soon as clients pay.
Set up bookkeeping. A spreadsheet or software that records every invoice and expense. Cash basis is the default for sole traders, so you record income and costs when the money moves.
Create an invoice template. Include a unique invoice number, your name and any business name, your contact details, the client's name and address, a clear description of the work, the supply date, the invoice date, the amounts and the total owed.
Write a simple contract. Cover scope, fees, payment terms, revisions, ownership of the work and how either side can end the arrangement.

Common mistake

Spending your first payments as if they were salary. A salary has already had tax and National Insurance taken off. Freelance income has not. If you spend it all, your first tax bill can be a nasty shock.

Months one to six: build habits

Once work is flowing, the goal is to keep the admin small and regular.

Set aside tax every time you are paid

Self-employed people pay Income Tax and Class 4 National Insurance on profits. For 2026/27 in England, Wales and Northern Ireland, the Personal Allowance is £12,570, the basic rate is 20% up to £50,270 and the higher rate is 40% up to £125,140, with 45% above that. Scotland has different bands. Class 4 National Insurance is 6% on profits between £12,570 and £50,270 and 2% above £50,270.

As a rough rule of thumb, start by moving somewhere around a quarter to a third of each payment into their tax pot, then adjust once they have a clearer view of their profit. Higher earners may need more.

Track expenses as you go

You can deduct allowable expenses: costs incurred wholly and exclusively for the business, such as equipment, software, business travel that is not commuting, marketing and relevant training. For costs that are partly personal, such as your phone, claim only the business share. If you work from home for 25 hours or more a month, you can use the simplified flat rate for working from home instead of working out actual costs. Keep receipts the same day.

Chase payments on a schedule

Under the late payment law for business transactions, if no payment date is agreed, payment is late 30 days after the client receives your invoice or you deliver, whichever is later. You can usually claim statutory interest of 8% plus the Bank of England base rate, plus fixed compensation for recovery costs. Knowing this helps you set clear terms and chase with confidence.

£40 to £100 Fixed compensation you can claim on a late commercial payment, depending on the size of the debt, on top of statutory interest GOV.UK, Late commercial payments

A blank spiral-bound notebook with a pen lying on a wooden table — A simple weekly admin list keeps invoices, receipts and tax savings on track.

Replace the safety net your job gave you

This is the part of going freelance that people most often postpone. It is worth tackling in your first six months.

What you had as an employee	What changes when you freelance	Options to consider
Workplace pension with employer contributions	No employer pension	A personal pension or SIPP, which gets tax relief on contributions
Statutory Sick Pay	Self-employed people do not get it	Emergency savings, income protection insurance, and checking New Style ESA or Universal Credit eligibility
Paid holiday	No work, no pay	Build holiday into your rates and your savings plan
Employer's insurance cover	You carry your own business risk	Professional indemnity, public liability or equipment insurance, depending on your work
Tax handled through PAYE	You file Self Assessment	A tax savings pot and a deadline calendar

Your National Insurance record also matters for your future State Pension. You usually need 35 qualifying years for the full new State Pension and at least 10 for any. If your profits are £7,105 or more, Class 2 is treated as paid, which protects your record. If your profits are lower, you can pay voluntary Class 2 at £3.65 a week.

Months six to twelve: plan for your first tax return

Your first Self Assessment return is the big milestone of your first freelance year. Plan for it well before January.

Know your dates. The online return and the balancing payment are due by 31 January after the end of the tax year. The paper return deadline is 31 October.
Expect payments on account. If your bill is £1,000 or more and less than 80% of your tax was collected at source, HMRC asks for two advance payments toward the next year, each normally half of the previous year's bill, due 31 January and 31 July. In your first year, that can mean paying your full first-year bill plus a first payment on account in the same January.
Check Making Tax Digital. If your qualifying income is over the threshold, you may need digital records and quarterly updates. The threshold is £50,000 from April 2026, £30,000 from April 2027 and £20,000 from April 2028.
Watch the VAT threshold. If your taxable turnover goes above £90,000, you must register for VAT.
Review your structure. If profits have grown strongly, ask an accountant whether staying a sole trader still makes sense.

Example

For example, imagine a freelancer whose first-year tax bill is £4,000. Because it is over £1,000 and none was collected through PAYE, she pays the £4,000 balancing payment plus a £2,000 first payment on account by 31 January, then another £2,000 by 31 July. These figures are made up, but the pattern is common, which is why a tax pot matters so much.

Your full first-year checklist

Tick these off in year one

Save a cash buffer before going full-time
Choose your structure and, if contracting, read up on IR35
Register for Self Assessment and save your UTR
Open a business bank account and a tax savings pot
Set up bookkeeping and an invoice template
Use a written contract with payment terms
Move a share of every payment into your tax pot
Keep receipts and track allowable expenses weekly
Arrange insurance that fits your work
Start a pension and plan for sick days and holidays
Check whether Making Tax Digital or VAT applies
Add 31 January, 31 July and 5 October to your calendar

Frequently asked questions

Do I need to tell HMRC as soon as I go freelance?

You can start working straight away, but you must register for Self Assessment if you earn more than £1,000 from self-employment in a tax year. The deadline is 5 October after the end of the tax year in which you started. Registering early is sensible.

How much should I save for tax in my first year?

It depends on your profit, other income and where you live. A common rule of thumb is around a quarter to a third of each payment, but remember payments on account can make your first January bill larger. An accountant can help you set a figure.

Do I need an accountant in my first year?

Not necessarily. Many freelancers file their own returns. An accountant can be worth it if your income is complex, you are unsure about expenses or you are considering a limited company.

Can I keep my job and freelance on the side?

Yes. Your salary stays in PAYE and your freelance profit goes on a Self Assessment return. Check your employment contract for rules on outside work first.

The bottom line

Your first freelance year is as much about building systems as building a client list. Register with HMRC on time, keep business money separate, save for tax from every payment, use clear contracts and invoices, and replace the pension, sick pay and insurance your job used to provide. Get those in place and you can focus on the work you went freelance to do.

This is general information, not tax or financial advice. Rates and thresholds change every tax year, so check the latest guidance on GOV.UK or with HMRC, and speak to an accountant if your circumstances are not straightforward.