MTD ITSA Self Assessment Making Tax Digital UK Tax
Making Tax Digital for Income Tax: What It Means for You and When It Kicks In
If you’re self-employed or a landlord in the UK, Making Tax Digital for Income Tax Self Assessment, known as MTD ITSA, is one of the biggest changes to UK tax compliance in a generation. Here’s everything you need to know, in plain English.
Not sure how MTD ITSA affects you? Let’s talk.
What Is MTD ITSA?
Making Tax Digital for Income Tax Self Assessment is HMRC’s plan to replace the annual self assessment tax return with a fully digital, quarterly reporting system. Instead of filing once a year, you’ll be required to submit a summary of your income and expenses to HMRC every three months using HMRC-approved software.
The goal is to make the UK tax system more accurate, reduce errors, and give both taxpayers and HMRC a real-time picture of tax liabilities throughout the year rather than one frantic annual scramble.
Who Does MTD ITSA Apply To?
MTD ITSA applies to individuals who receive income from self-employment or property (or both) above a certain threshold. Partnerships are also expected to follow in later phases. You will need to comply if:
- You’re self-employed with qualifying income above the relevant threshold
- You’re a landlord with rental income above the threshold
- You currently file a self assessment tax return
Key Dates and Deadlines You Need to Know
The rollout happens in phases based on your level of qualifying income:
| Phase | Who It Affects | Start Date |
|---|---|---|
| Phase 1 | Self-employed & landlords with income over £50,000 | April 2026 |
| Phase 2 | Self-employed & landlords with income over £30,000 | April 2027 |
| Phase 3 | Self-employed & landlords with income over £20,000 | April 2028 |
Each quarter, you’ll have roughly five weeks after the quarter ends to submit your update. A final end-of-period statement is due after the tax year closes, and a final declaration replaces the current self assessment return.
Already in Phase 1 or Phase 2? Don’t leave it to the last minute.
How Does the MTD ITSA Process Work?
The process runs on a continuous cycle throughout the tax year:
- Keep digital records: all income and expenses must be recorded in HMRC-compliant software throughout the year
- Submit quarterly updates: a summary of income and expenses goes to HMRC every three months
- End-of-period statement: at the end of the tax year, you confirm and finalise the figures
- Final declaration: this replaces your current self assessment return, confirming all other income sources and claiming any reliefs
A good accountant will handle all of this on your behalf, keeping you compliant and informed without the stress.
What Are the Benefits for Taxpayers?
Done properly, MTD ITSA offers some genuinely useful advantages:
- No year-end bill shock: quarterly updates give you a running estimate of your tax liability, so there are no nasty surprises in January
- Better financial visibility: you and your accountant have a real-time view of your profitability and tax position throughout the year
- Fewer errors: real-time digital records are more accurate than reconstructing a year’s worth of transactions under deadline pressure
- Improved cash flow planning: knowing your tax position earlier means you can set money aside in time and plan ahead with confidence
- More proactive advice: quarterly touchpoints create natural opportunities to discuss tax planning, not just compliance
Ready to get ahead of MTD ITSA? We make the transition simple, stress-free, and affordable, starting from just £12 per month.
How We Can Help
At Keep The Taxman Happy, we specialise in making MTD ITSA straightforward for sole traders, landlords, and small business owners. Whether you want us to handle everything on your behalf or simply the right software and support, we have a package to suit you.
We’ll set you up with compliant software, manage your quarterly submissions, keep you informed of your tax position throughout the year, and make sure you’re never caught out by a deadline again.
Speak to our team today, no jargon, no obligation.
This article is for general information purposes only and does not constitute tax advice. Tax rules may change. Always consult a qualified tax adviser regarding your individual circumstances. © Keep The Taxman Happy 2026.