Self Assessment Helper

Self assessment can feel overwhelming, especially if it is your first time or your circumstances have changed. Whether you are a freelancer, a landlord, a contractor, or someone with a side income, this tool helps you understand what you need to declare, what expenses and allowances you can claim to reduce your bill, the key deadlines you must not miss, and how payments on account work. Tell us about your situation and get a personalised, plain English guide to completing your return without the stress.

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Confused by self assessment? Tell us about your income and circumstances and get a clear guide to what you need to declare, what you can claim, and the key deadlines.

1 Why do you need to do a self assessment?

2 What tax year is this for?

3 Have you done self assessment before?

4 What is your main concern?

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This tool provides general guidance about self assessment. For specific tax advice about your return, consult a qualified accountant or tax adviser.

What this tool is for

Self assessment trips up a lot of people, not because they are careless, but because the rules shift depending on what you earn, how you earn it, and what else is going on in your life. This tool takes your situation and gives you a clear, plain English summary of what HMRC expects from you and how to keep your tax bill as low as it legitimately can be.

It is not a replacement for an accountant if your affairs are complicated, but for most people filing a return it will tell you what you actually need to know before you log in to the HMRC portal.

Who it is aimed at

It is built for anyone in the UK who has to file a self assessment return, or thinks they might need to. That includes the self employed and freelancers, company directors, landlords with rental income, people with untaxed side income from things like tutoring or online selling, higher earners caught by the child benefit charge, and anyone with investment or dividend income above the usual allowances.

It is also useful if your circumstances have changed in the last tax year, for example you started freelancing alongside a PAYE job, sold a second property, or began renting out a room. If you are not sure whether you even need to file, the tool will help you work that out too.

How it works

You answer a short set of questions about your income, your work situation, and anything you think might affect your return. The tool then gives you a written summary covering what to declare, which expenses and allowances are likely to apply to you, the deadlines that matter for your case, and a straightforward explanation of payments on account if they affect you. Your answers are not saved and nothing is shared with HMRC, it is simply a guide you can read, print, or use as a checklist when you sit down to file.

2 Comments

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TheTaxGuide Editor 11 Aug 2026

@Nodo On £36,000 pension income you're well inside the basic rate band (20%), since higher rate doesn't kick in until £50,270. So you've got roughly £14,000 of headroom before you'd hit 40%. Premium Bonds have nothing to do with income tax bands; you can hold anywhere from £25 up to £50,000, and any prizes are tax free. If HMRC codes it all through PAYE, you shouldn't need to file anything.

Nodo 11 Aug 2026

I have pension typebincome to £36000 a year. What tax rate am I on or near to for higher rate? Am I allowed £50 or £100 in P.B. I dont submit an annyal tax return, it us done auto by H.M.

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