Do I need to check my numbers during the year?

Why your tax return is too late

Your tax return for the year starting 6 April 2025 isn't due until 31 January 2027, almost 22 months later. By the time you see the full picture, the year is long finished. That works for HMRC. It's no help if your profit started sliding last spring.

What a freelancer's monthly check looks like

There's no set format and nothing to file. Pick what's useful to you. Most freelancers need four things:

1. Income and costs for the month, set against the same month last year. The gap tells you more than the totals.
2. Who owes you. Unpaid invoices, and how long they've been waiting.
3. Your tax pot. What you've put aside against what you're likely to owe.
4. One or two numbers that drive your work, such as your average day rate, booked days for next month or how many enquiries became jobs.

Add a line or two on what changed and what you'll do about it. If a number never changes a decision, drop it.

How it pays off

• You notice creeping costs early. Software subscriptions, kit hire and travel rise a little at a time.
• You see cash gaps coming. A busy month on paper can still leave you short if clients pay late.
• You know your tax bill before January, so there's no shock.
• You can price with confidence, because you know what each type of job really earns you.
• You have figures ready when a mortgage lender or landlord asks for proof of income.

Worked example

Maya is a freelance video editor. She turns over about £5,000 a month and her costs usually run at 15%, so she keeps about £4,250. Over the spring, a new plug-in subscription, extra cloud storage and two rented drives push her costs up to 25%. That's £500 a month less profit.

With a monthly check, Maya spots it after the first month, cancels what she doesn't need and adds kit hire to her quotes. Without one, the same costs run all year and she finds out at tax return time.

That's £6,000 of profit gone across a year before anyone notices.

How often

Monthly suits you if your income goes up and down, you employ anyone or cash feels tight. Quarterly is often enough if your work is steady. You're probably ready to start if:

• you're busier than ever but not sure you're earning more
• some months feel tight even though you're working flat out
• you're close to the VAT threshold
• you'd like to know your tax bill before it arrives

Making Tax Digital gets you most of the way

If you're a sole trader or landlord with qualifying income over £50,000, Making Tax Digital for Income Tax has applied since April 2026. That falls to £30,000 from April 2027 and £20,000 from April 2028. You keep digital records and send HMRC quarterly updates.

So your books are already up to date every quarter. Turning them into a short check for yourself is a small step further, and it gets you something useful back from work you're doing anyway.

Getting started

• Get your bookkeeping into an app and keep it up to date every month.
• Set a rough target for the year, even a simple one.
• Choose one or two numbers to watch.
• Put a monthly or quarterly review in your diary.
• Spend 30 minutes with your figures and write down one action.

This guide gives general information based on UK rules as at November 2026. Speak to us about what would work for you.