What MTD for Income Tax means
MTD for Income Tax, sometimes written as MTD ITSA, stands for Making Tax Digital for Income Tax Self Assessment. It is an HMRC programme that moves income tax reporting away from a single yearly return and towards digital record keeping with regular updates through the year. The rules apply to self-employed sole traders and landlords, and they change how you record income, how often you report, and the software you use to do it.
Under the current system, you keep records however suits you and file one Self Assessment return after the tax year ends. Under MTD for Income Tax, three things become mandatory. You must keep your business records digitally. You must send HMRC a summary of income and expenses every quarter using compatible software. And you must submit a final declaration that confirms your figures for the year. The final declaration replaces the Self Assessment return you file today.
The practical effect is that reporting becomes a routine you keep on top of through the year rather than a rush each January. That is a real shift in habit, and it is the reason preparing early is worth the effort.
Who is affected, and when
MTD for Income Tax is being introduced in stages based on your qualifying income, which means your total gross income from self-employment and property before expenses are deducted. Because the test looks at turnover rather than profit, some people cross a threshold on income while taking home considerably less. It is worth checking the gross figure now.
- From 6 April 2026 Qualifying income above £50,000
Sole traders and landlords above this level must follow the rules. This is the first wave.
- From 6 April 2027 Qualifying income above £30,000
The threshold drops to this level.
- From 6 April 2028 Qualifying income of £20,000 or more
The rules extend to those at this level.
HMRC uses the income figure from your most recent finalised Self Assessment return to decide when you join. If your 2024 to 2025 return shows combined self-employment and property income above £50,000, you are in the first wave and April 2026 is your deadline to be ready. A few groups are excluded or can apply for an exemption, including people who genuinely cannot use digital tools. General partnerships have their own timetable and are not covered by the April 2026 start.
How quarterly reporting works in practice
The headline change under MTD for Income Tax is frequency. Instead of one return, you send four quarterly updates plus a final declaration. Each quarterly update is a running summary of your business income and expenses for the period, submitted through MTD-compatible software rather than typed into the HMRC website by hand.
The standard quarterly periods run to 5 July, 5 October, 5 January and 5 April, with each update due one month and seven days after the period ends. You can elect for calendar-quarter dates if that fits your records better. The updates are cumulative and are not your final tax bill; they are a regular snapshot. You confirm the full-year position in the final declaration, which is due by 31 January after the tax year, the same date Self Assessment uses today.
Two points catch people out. First, digital record keeping is not the same as keeping a spreadsheet you tidy up later: the link between your records and your submission must be digital, so manual retyping between systems is not allowed. Second, four updates a year means four moments when your figures need to be accurate, so a tidy, continuous bookkeeping habit becomes far more valuable than a shoebox of receipts.
What digital record keeping really involves
A common worry about MTD for Income Tax is that digital record keeping sounds like a heavy new burden. In practice it means recording each item of business income and expense in software as it happens, rather than gathering paperwork once a year. You still keep evidence such as invoices and receipts, but the figures that feed your quarterly updates live in one digital place from the start.
HMRC requires the flow of data from your records to your submission to be digital, which is sometimes called a digital link. In plain terms, you should not have to read a number off one system and retype it into another. Software that captures the transaction once and carries it through to the quarterly update and the final declaration removes the manual copying where errors usually appear.
For most people this is less work overall, not more. Recording a few transactions each week is far lighter than reconstructing a whole year from a carrier bag of receipts every January, and it means your quarterly figures are ready when the deadline arrives.
How to get ready for MTD for Income Tax
Getting ready is mostly about starting early and building the habit before it becomes compulsory. A short checklist covers the essentials.
- Check your qualifying income. Look at your most recent Self Assessment return and add your self-employment and property income. If it is above £50,000, April 2026 applies to you.
- Move your records digital now. The sooner you keep income and expenses in compatible software, the smoother the switch. There is no benefit to waiting.
- Choose MTD-compatible software. You need a tool that can submit quarterly updates and the final declaration to HMRC. Quarterly Filer is built for sole traders and landlords doing exactly this.
- Practise the quarterly rhythm. Start recording as you go and reconciling little and often, so the first real update in 2026 is routine rather than a first attempt under pressure.
None of these steps is difficult on its own. The advantage goes to the people who begin before the deadline forces them to, because they reach April 2026 already in the habit rather than learning a new system when the clock is running.
How Quarterly Filer helps
Quarterly Filer is built to HMRC's Making Tax Digital specification and connects through HMRC's official Making Tax Digital service. We are currently completing HMRC's recognition process. It is designed for the compulsory parts of MTD for Income Tax and nothing you do not need: you connect securely to HMRC, import your figures from CSV, and file your four quarterly updates and the final declaration from one place.
Submission history keeps a record of what you filed and when, and deadline reminders track your quarterly periods and prompt you before each one, so a missed submission and its penalty are far less likely. If you get stuck, you can reach us through the contact form for help with the software.
It is £49 a year, one payment covering your four quarterly updates and the year-end final declaration, or £18 for a single one-off submission. Your first quarterly update is free, with no setup fees.
Common questions about MTD for Income Tax
Do I still file a Self Assessment return under MTD?
Not in its current form. Once you are in MTD for Income Tax, your four quarterly updates and a final declaration replace the annual Self Assessment return. The final declaration is where you confirm your income, claim reliefs and allowances, and settle your tax position for the year.
Is my income measured on profit or turnover?
Qualifying income is measured on gross income before expenses, not profit. This is why some sole traders and landlords are surprised to find they cross the £50,000 threshold even though their take-home earnings are lower. Check the gross figure, not what is left after costs.
What happens if I miss a quarterly deadline?
HMRC operates a points-based penalty system for late submissions. You receive a point for each missed deadline, and a financial penalty applies once you reach a threshold. Software that reminds you before each period ends, and files on your behalf, is the simplest way to avoid points building up.
Can I handle MTD for Income Tax without an accountant?
Yes. MTD for Income Tax is designed to be manageable with the right software. Quarterly Filer handles the digital records and the submissions, so many sole traders and landlords will not need to pay for ongoing accountancy support simply to stay compliant.