UK Making Tax Digital for Income Tax: Sole Trader Guide 2026

Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) is one of the biggest changes to UK tax administration in decades. After years of delays, the regime is now live for the highest-earning sole traders and landlords from April 2026, with a broader rollout to follow. If you run your own business or earn rental income, this guide explains exactly what you need to do and when.

What Is MTD for ITSA?

MTD for ITSA requires self-employed individuals and landlords to keep digital records and submit quarterly updates of their income and expenses to HMRC throughout the tax year, rather than filing a single annual Self Assessment return. The goal is to make tax reporting more accurate and spread the administrative workload across the year.

The regime replaces the traditional SA100 Self Assessment return for those within scope, though you will still complete a Final Declaration (similar to a tax return) at the end of each tax year.

Who Must Join and When?

HMRC is phasing in MTD for ITSA based on the level of qualifying income:

April 2026 -- sole traders and landlords with total qualifying income above £50,000 per year must join. Qualifying income means gross turnover from self-employment plus gross rental income before expenses.

April 2027 -- the threshold drops to £30,000. Those who were not captured in 2026 but have qualifying income above £30,000 must join at this point.

April 2028 and beyond -- the £20,000 threshold and potential inclusion of general partnerships are expected to follow, though the government has not yet confirmed final dates for these groups.

If your income sits close to a threshold, HMRC will assess your status based on the previous tax year's figures. You should monitor your income carefully in the years leading up to each rollout date.

The Quarterly Reporting Cycle

Once you are within MTD for ITSA, you must submit four quarterly updates per tax year. The standard quarterly periods align with the tax year quarters:

• Quarter 1: 6 April to 5 July -- submission deadline 7 August
• Quarter 2: 6 July to 5 October -- submission deadline 7 November
• Quarter 3: 6 October to 5 January -- submission deadline 7 February
• Quarter 4: 6 January to 5 April -- submission deadline 7 May

Each quarterly update reports your income and expenses in summary form. You are not paying tax at this point -- you are simply giving HMRC a running picture of your financial position. HMRC will provide an estimated tax liability after each submission, which can help you budget.

You may also elect to use calendar quarter periods (ending 31 March, 30 June, 30 September, 31 December) rather than the standard tax year quarters, which may suit businesses that already use these dates.

End of Period Statement and Final Declaration

After the four quarterly updates, you must complete two further steps:

End of Period Statement (EOPS) -- this is where you make accounting adjustments, claim allowances (such as the trading allowance or AIA), and confirm that the quarterly figures are correct. The EOPS is submitted per income source -- so if you have both self-employment and rental income, you submit a separate EOPS for each.

Final Declaration -- this replaces the traditional Self Assessment return. You declare all other income (employment income, savings, dividends) and claim any reliefs or deductions not already captured. The Final Declaration must be submitted by 31 January following the end of the tax year -- the same deadline as the current SA return.

Compatible Software

HMRC will not provide a free tool for MTD for ITSA submissions -- you must use HMRC-recognised third-party software. The software must be able to:

• Maintain digital records of income and expenses
• Connect directly to HMRC's API to submit quarterly updates
• Generate the EOPS and Final Declaration

Popular options being developed for MTD ITSA include products from Xero, QuickBooks, Sage, FreeAgent, and several smaller providers. Prices vary significantly, so it is worth comparing features. Some providers offer bridging software that connects spreadsheets to HMRC's API, which may suit those comfortable managing their own records in Excel or Google Sheets.

When choosing software, check that it covers:

• Multiple income sources if you have both self-employment and rental income
• The specific quarters you need (tax year or calendar)
• Final Declaration functionality, as some entry-level tools may only cover the quarterly updates

Exemptions from MTD for ITSA

Not everyone will be required to join. HMRC can grant exemptions in specific circumstances:

Below the income threshold -- if your qualifying income is genuinely below the applicable threshold, you remain on standard Self Assessment and do not need to join. It is your responsibility to monitor whether your income crosses the threshold.

Digital exclusion -- if you cannot use digital tools due to age, disability, religious reasons, or lack of internet access in a remote location, you can apply for a digital exclusion exemption. HMRC will consider applications on a case-by-case basis.

Insolvency -- businesses in formal insolvency proceedings are exempt during that period.

Short periods of self-employment -- those who become self-employed or start receiving rental income partway through a year may have transitional arrangements.

If you think you qualify for an exemption, apply to HMRC before the mandation date for your income band. Do not simply ignore the requirement.

Practical Steps to Prepare

Whether April 2026 already applies to you or you are preparing for a future date, the steps are the same:

1. Check your qualifying income -- add your gross self-employment turnover and gross rental income for the last full tax year. Compare against the applicable threshold.
2. Choose compatible software -- start using it now, not in April. Familiarise yourself with the interface and ensure your records are clean before the first quarterly deadline.
3. Digitise your record-keeping -- if you currently keep paper records or use spreadsheets without a bridging tool, transition to digital records. Every income and expense transaction must have a digital record.
4. Set quarterly reminders -- the deadlines are one month and two days after each quarter ends. Missing these deadlines accumulates penalty points.
5. Review your business structure -- if you operate through a limited company, MTD for ITSA does not apply (companies are subject to MTD for Corporation Tax, a separate regime). Some sole traders near the threshold may consider whether incorporation makes sense for other reasons.

How MTD ITSA Affects Your Tax Bill

MTD for ITSA does not change how much tax you owe -- the calculations remain the same. Your taxable profit is still your income minus allowable expenses, and the 2026/27 rates apply (Personal Allowance £12,570, 20% basic rate up to £50,270, 40% higher rate up to £125,140). What changes is when HMRC receives the information and how penalties for non-compliance are applied.

One indirect effect: because you are submitting quarterly, you may spot errors or underpayments earlier, giving you time to set aside tax before the January payment deadline. HMRC's estimated liability updates after each quarterly submission, giving you a clearer picture throughout the year.

Frequently Asked Questions

Q: I am a sole trader but my income is only £25,000. Do I need to join MTD ITSA in April 2026? A: No. The April 2026 mandate only applies to those with qualifying income above £50,000. At £25,000 you will not be mandated until at least April 2028, when the £20,000 threshold is expected to come into force.

Q: Does MTD ITSA apply to partnerships? A: General partnerships are not included in the current rollout. HMRC has indicated they will be included at a future date, but no confirmed date has been announced. Limited liability partnerships and limited partnerships may be included later.

Q: Can I still use an accountant to file under MTD ITSA? A: Yes. Your accountant or tax agent can submit on your behalf using agent-enabled software. However, the digital record-keeping requirement means you still need compatible software at your end, even if your accountant handles submissions.

Q: What if I miss a quarterly deadline? A: You receive a penalty point. Once you accumulate the threshold number of points (four for quarterly filers), a £200 penalty is charged. Points can be reset if you submit all returns on time for a sustained period and any financial penalties have been paid.

Q: I have both self-employment income and rental income. Do I need two separate software tools? A: No, but your software must support multiple income sources. Many products handle both self-employment and property income within a single account. Check this before subscribing.

Q: Does MTD ITSA replace my January Self Assessment return entirely? A: It replaces the main SA100 filing. You will still complete a Final Declaration by 31 January, which covers other income and reliefs. Payment deadlines (31 January and 31 July for payments on account) remain unchanged.

Q: Is there a penalty for not keeping digital records? A: Yes, separate from the late submission penalties. HMRC can charge penalties for failure to keep records in the required digital format, though the initial approach is expected to focus on education before enforcement.

Q: What counts as qualifying income for the threshold? A: Gross self-employment turnover (before expenses) plus gross property rental income (before expenses). PAYE employment income and investment income do not count towards the MTD ITSA threshold.

Q: Can I apply for a voluntary deferral if I am not ready? A: No general deferral option exists. If you are within scope, you must join by the mandation date. Applications for exemption (digital exclusion) are separate and require specific qualifying grounds.

Q: I currently file my own Self Assessment online via HMRC's website. Can I continue doing that under MTD ITSA? A: No. HMRC's online filing portal is not MTD-compatible. You must use third-party software recognised by HMRC for MTD ITSA submissions. Start researching and trialling software well before your mandation date.