Tax & Self-Assessment
UK Self Assessment for Landlords & Side Income (2026)
A 6,786-word plain-English guide that walks UK landlords, side-income earners, and investors through Self Assessment from registration to submission, so you declare the right figures, claim every allowance you are owed, and file with confidence.
What you get
Do you even need to file?
Clear 2025/26 trigger rules so you know exactly whether HMRC expects a return from you.
Rental income done right
What to declare, which costs to deduct, and how the mortgage interest restriction actually works now.
Side income and the trading allowance
Know precisely when your £1,000 buffer runs out and what to do when it does.
Capital gains made simple
The October 2024 rate changes and the split-year problem explained in plain English, without the jargon.
Dividends and savings income
Current thresholds, shrinking allowances, and how each sits within your tax bands.
Deadlines without panic
Every key HMRC date laid out clearly, with what happens if you miss one and how to avoid penalties.
Registration step by step
Exactly how to register with HMRC for Self Assessment, including what you need before you start.
About this guide
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Questions
What do I get with UK Self Assessment for Landlords & Side Income (2026)?
An instant-download PDF guide you can read on your phone, tablet or computer, or print. Clear, plain English, and specific to the UK.
How do I get it after I pay?
Checkout is handled securely by Stripe. Your download appears the moment you pay, on the confirmation page and by email, so you can start reading straight away.
Is it up to date?
Yes. It is checked against the latest UK rules, rates and thresholds for 2026, and when they change you get the updated version free, for life.
What if it is not for me?
If you read it and honestly have not learned something new, email us within 7 days for a full refund. No forms, no fuss.
Is this legal or financial advice?
No. It is clear, practical information to help you understand your options and act with confidence, not regulated legal or financial advice.