The UK tax system is undergoing its most significant transformation in decades. If you are asking, what is Making Tax Digital for Income Tax?, this guide details the exact mechanics, thresholds, and immediate compliance requirements for the 2026/27 tax year.
At its core, Making Tax Digital (MTD) for Income Tax Self Assessment (ITSA) legally mandates businesses to keep digital records and use third-party software to submit their tax data to HMRC. Instead of filing a single annual return, taxpayers must use MTD-compatible software to send quarterly summaries of their income and expenses, followed by an end-of-year report.
Who is Mandated and When? (The 2026/27 Thresholds)
MTD for ITSA targets sole traders and landlords. From 6 April 2026, you must operate MTD if your total qualifying income from trading and property exceeds £50,000.
HMRC will stagger the mandation thresholds over the coming years to capture smaller businesses gradually:
- From 6 April 2026: Mandatory for qualifying income over £50,000.
- From 6 April 2027: Mandatory for qualifying income over £30,000.
- From 6 April 2028: Mandatory for qualifying income over £20,000.
Calculating “Qualifying Income”
Your “qualifying income” is the total gross income (turnover before you deduct expenses) you receive in a tax year from self-employment and property. HMRC assesses this figure based on the Self Assessment tax return you submitted in the previous tax year.
If you operated a trade for less than 12 months, special annualisation rules apply. HMRC will annualise your self-employment income to determine if you breach the threshold (for example, doubling the income of a business that only traded for six months). Landlords must annualise their property income themselves to check their status.
Included Income Sources
When calculating your threshold, you must include:
- Gross self-employment income.
- UK and foreign property income.
- Your share of income from jointly owned property.
Excluded Income Sources
Not all income counts towards the MTD threshold. You exclude the following from your qualifying income calculation:
- Employment income (PAYE).
- Dividends (including those from your own limited company).
- State Pension and private pensions.
- Your share of profit from a partnership as an individual partner.
Exceptions and Deferrals
HMRC grants automatic deferrals for specific taxpayers. You do not need to use the MTD service before April 2027 if you:
- Claim qualifying care relief (such as foster carers or kinship carers).
- Submit the SA109 supplementary page to report non-UK residence.
Quarterly Updates: Requirements and Deadlines
Under MTD, your compatible software adds together your digital records every three months to create category totals for your income and expenses. You must send these totals to HMRC as a quarterly update for each source of income (e.g., one for self-employment, one for property).
The standard quarterly update deadlines align with the tax year and are fixed:
- Quarter 1 (6 April to 5 July): 7 August.
- Quarter 2 (6 April to 5 October): 7 November.
- Quarter 3 (6 April to 5 January): 7 February.
- Quarter 4 (6 April to 5 April): 7 May.
“Every 3 months, your compatible software adds together your digital records to create totals for each income and expense category. These totals are then sent to HMRC as a quarterly update.”
For the first mandation phase beginning 6 April 2026, the absolute deadline to submit your first quarterly update is 7 August 2026.
Penalties and the 2026/27 “Soft Landing”
HMRC enforces compliance through a points-based penalty system. Under normal rules, missing a quarterly update deadline incurs a penalty point; reaching four points triggers a £200 fine.
However, HMRC offers a transitional “soft landing” period. For the 2026 to 2027 tax year only, HMRC will not apply penalty points for late quarterly updates. You must still submit the updates before you can file your final tax return, and standard penalty points will apply if your final tax return is late.
Summary Table: MTD for Income Tax Requirements 2026/27
| Element | Party | Provision / Event | Date / Threshold | Outcome |
|---|---|---|---|---|
| Mandation | Sole Traders & Landlords | Commencing MTD for ITSA | 6 April 2026 | Must use software for digital records and updates if qualifying income > £50,000. |
| Measurement | Taxpayer | Qualifying Income Definition | 2026/27 | Gross self-employment and property income included; employment, dividends, and partnership profits excluded. |
| Calculation | Taxpayer | Annualisation Rules | 2026/27 | Income earned over periods shorter than 12 months is annualised to test against the threshold. |
| Exception | Taxpayer | Temporary Deferrals | 2026/27 | Non-residents (SA109) and carers claiming qualifying care relief are deferred until April 2027. |
| Future Rollout | Sole Traders & Landlords | Lower Thresholds | April 2027 / 2028 | Threshold drops to £30,000 in 2027, then £20,000 in 2028. |
| Compliance | Taxpayer | Q1 Update Deadline | 7 August 2026 | Deadline to submit the first quarterly update via compatible software. |
| Enforcement | HMRC | Points-based Penalties | 2026 to 2027 | Penalty points waived for late quarterly updates during the first year. |
Next steps for advisors: Review your self-assessment client base to identify sole traders and landlords breaching the £50,000 gross income threshold, apply any necessary annualisation rules for new businesses, and ensure they acquire compatible MTD software ahead of the first 7 August 2026 quarterly update deadline.
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