What is MTD ITSA?
MTD ITSA stands for Making Tax Digital for Income Tax Self Assessment. It is a HMRC programme that moves income tax reporting away from a single yearly return and towards digital record keeping with regular updates throughout 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, a sole trader keeps records however they like, then files one Self Assessment return after the tax year ends. Under MTD, 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 aim is fewer errors and a more up to date picture of what you owe. The practical effect is that reporting becomes a routine you keep on top of throughout the year rather than a scramble each January. That is a meaningful shift in habit, and it is the reason preparing early matters.
Who is affected by the April 2026 deadline?
MTD for sole traders 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. The first group is brought in from 6 April 2026.
- From April 2026 Qualifying income above £50,000
Sole traders and landlords above this level must follow MTD for Income Tax.
- From April 2027 Qualifying income above £30,000
The threshold drops to this level.
- From April 2028 Qualifying income above £20,000
The government has confirmed plans to extend the rules to 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. It is worth checking that figure now, because the threshold looks at turnover, not profit, and many sole traders cross £50,000 in income while taking home considerably less.
A few groups are excluded or can apply for exemption, including people who genuinely cannot use digital tools. General partnerships have their own timetable and are not covered by the April 2026 start. If you are close to a threshold, treat the earlier date as your planning target rather than hoping to fall below it.
How quarterly reporting works in practice
The headline change for MTD for sole traders 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 correct and 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 actually means
A common worry about MTD for sole traders 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. Good software captures the transaction once and carries it through to the quarterly update and the final declaration without manual copying, which is where errors usually creep in.
For most sole traders 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 Quarterly Filer helps with MTD for sole traders
Quarterly Filer is built for exactly this change. It is built to HMRC's Making Tax Digital specification, designed around the way a sole trader actually works, so you can meet the new requirements without hiring an accountant to manage the software for you. The goal is simple: keep your records in one place, and let the tool handle the quarterly submissions to HMRC.
Digital records that satisfy the rules
Record income and expenses as you go, so your bookkeeping is always ready to submit and there is no manual retyping between systems.
Quarterly updates on time
Quarterly Filer prepares each of your four updates and files them digitally to HMRC, with clear deadlines so nothing slips.
Reminders that keep you ahead
The software tracks your quarterly periods and prompts you before each deadline, which removes the risk of a missed submission and a penalty.
A straightforward final declaration
When the year ends, your quarterly figures roll into the final declaration, so finishing your tax position is a review rather than a rebuild.
Because MTD for sole traders rewards a steady routine over a yearly panic, the value of the right software is not only compliance. It is the time you get back and the confidence of always knowing where your numbers stand. Quarterly Filer is designed to make the quarterly rhythm feel light, so the deadline in April 2026 becomes a formality rather than a scramble.
How to prepare for MTD before April 2026
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 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.
None of these steps is difficult on its own. The advantage goes to the sole traders who begin before the deadline forces them to, because they reach April 2026 already in the habit rather than learning a new system under pressure.
Common questions about MTD for sole traders
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.
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.
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 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.
Can I handle MTD myself without an accountant?
Yes. MTD for sole traders is designed to be manageable with the right software. Quarterly Filer handles the digital records and the submissions, so many sole traders will not need to pay for ongoing accountancy support simply to stay compliant.