Setting up, expenses, Self Assessment, VAT and Making Tax Digital.
GOV.UK
Set up as a sole trader: step by step
What it is: HMRC's official checklist for starting out on your own.
Why it's worth reading: It covers everything in the right order: registering, records and when you'll pay tax.
Read it on GOV.UK →MoneyHelper
How to start a business or become self-employed
What it is: A plain-English guide to the money side of going self-employed.
Why it's worth reading: Good on the things people forget, like irregular income, pensions and sick pay.
Read it on MoneyHelper →GOV.UK
Expenses if you're self-employed
What it is: The official list of business costs you can deduct from your income.
Why it's worth reading: Every allowable expense you miss means paying more tax than you need to.
Read it on GOV.UK →Which?
Self-employed expenses you can claim
What it is: A more detailed walk-through of allowable expenses, with examples.
Why it's worth reading: Helpful for the grey areas, like a phone or car you also use personally.
Read it on Which? →GOV.UK
Simplified expenses: working from home
What it is: A flat monthly rate you can claim for working from home, instead of working out actual bills.
Why it's worth reading: If you work from home and haven't claimed anything, this is easy money back.
Read it on GOV.UK →Which?
Self-employed capital allowances
What it is: How to claim for bigger purchases like laptops, tools and vans.
Why it's worth reading: Equipment is treated differently from everyday costs. This explains how.
Read it on Which? →GOV.UK
Tax-free allowances on trading income
What it is: The rules on the £1,000 trading allowance.
Why it's worth reading: If you have a small side hustle, you may not need to pay tax or even file a return.
Read it on GOV.UK →GOV.UK
Self-employed National Insurance rates
What it is: The current Class 4 rates and the rules on voluntary Class 2.
Why it's worth reading: Paying voluntary Class 2 can protect your State Pension if your profits are low.
Read it on GOV.UK →MoneyHelper
How to fill in a Self Assessment tax return
What it is: A step-by-step guide to completing your return.
Why it's worth reading: Read it before January, not on 30 January.
Read it on MoneyHelper →GOV.UK
Self Assessment tax return deadlines
What it is: The official dates for registering, filing and paying.
Why it's worth reading: The late filing penalty starts at £100 even if you owe nothing.
Read it on GOV.UK →★ Weekly pick: 2 November 2026
GOV.UK
Payments on account
What it is: HMRC's explainer on paying towards next year's bill in advance.
Why it's worth reading: This is why many people's first January bill is 50% bigger than expected.
Read it on GOV.UK →★ Weekly pick: 2 November 2026
GOV.UK
Making Tax Digital for Income Tax
What it is: HMRC's hub for the new quarterly reporting rules.
Why it's worth reading: It reaches self-employed and property income over £30,000 from April 2027. Check now whether you're in.
Read it on GOV.UK →★ Weekly pick: 2 November 2026
GOV.UK
Register for VAT
What it is: When you must register for VAT, and when you might choose to.
Why it's worth reading: Going over the threshold without noticing is an expensive mistake. Keep an eye on your rolling 12-month total.
Read it on GOV.UK →