What Is MTD for Income Tax? A 2026 Guide for Sole Traders and Landlords

Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is the most significant change to UK sole trader and landlord tax compliance in a generation. From 6 April 2026, any taxpayer with combined qualifying income from self-employment and property above £50,000 in 2024-25 must keep digital records, submit four quarterly updates to HMRC, and replace their annual Self-Assessment return with a Final Declaration. The threshold drops to £30,000 from April 2027.

This is a plain-English explanation of what MTD ITSA actually is, how the filing rhythm differs from the old annual return, what software counts as compliant, and the practical operational implications for sole traders and landlords.

The MTD ITSA filing cycle

Who is in scope

• UK-resident sole traders with self-employment turnover plus property income above £50,000 in 2024-25.
• UK-resident landlords with rental income plus any self-employment income above £50,000.
• Multiple income sources combine for the threshold test; each source has its own quarterly updates.
• Partnerships have a separate, later MTD timetable.
• Limited companies are outside MTD ITSA (MTD for Corporation Tax is a separate programme with no fixed date).

How quarterly updates work

A quarterly update is a totals submission, not a transaction-level filing. HMRC requires totals for income and broad expense categories (cost of sales, repairs, motor expenses, premises, admin, other) per business. The underlying transactions must sit in MTD-compatible software with digital links from source data preserved, but the API submission carries only totals. Quarterly updates do not generate a tax liability; they are operational data points that flow into the year-end Final Declaration.

What happened to the End of Period Statement

Earlier MTD guidance described a separate End of Period Statement (EOPS) for each income source. HMRC removed the EOPS before MTD ITSA went live. The year-end adjustments it would have carried (accruals, prior-year corrections, opening and closing inventory, capital allowances) are now made when you finalise each source as part of the Final Declaration. The result is one fewer filing type, not less year-end work.

The Final Declaration

The Final Declaration finalises and consolidates each income source, then layers in non-MTD income (dividends, PAYE, savings interest, capital gains), and produces the personal tax calculation. It is filed by 31 January following the tax year end, the same deadline as the old SA100. The Final Declaration is the legally binding return; HMRC raises assessments against it.

Penalty points for missed filings

MTD ITSA introduces a points-based penalty regime. Each missed filing earns one point. Four points in a 12-month rolling period (the threshold for quarterly filers) triggers a £200 fixed penalty. Each subsequent miss while at threshold earns another £200. Late-payment interest applies separately to any tax owed at the Final Declaration. Points can be reset by completing a clean 24-month period.

What changes for a business already on cloud software?

A business already running Xero, QuickBooks, FreeAgent, or Sage with bank feed integration and accurate categorisation is most of the way there. The remaining steps: enabling the MTD ITSA submissions through the software, agent authorisation under the new MTD scheme (not the old 64-8), a clean opening balance reconciliation at 5 April 2026, and a quarterly close discipline that did not exist under the annual cycle. Most businesses find the discipline change harder than the technology change.

How is MTD ITSA different from MTD VAT?

MTD VAT (live since 2019) covers VAT-registered businesses submitting their VAT return via the API every one to three months. MTD ITSA covers self-employment and property income for personal tax, with a different filing rhythm, different software endpoints, and a different agent authorisation flow. A VAT-registered sole trader will run both regimes in parallel from April 2026.

Can I be exempt from MTD ITSA?

HMRC grants digital exclusion exemptions on grounds of age, disability, location, religion, or other circumstances making electronic filing impractical. The exemption is not automatic; it must be applied for and approved. Application is via the HMRC helpline rather than online. Approval typically requires evidence (medical letters, location evidence).

Should I prepare even if I might be below threshold?

A business on the edge of £50k qualifying income should prepare on the assumption that MTD applies. The downside cost of preparing and not needing it (one year of software subscription, perhaps £150) is small. The downside cost of not preparing and needing it (missed quarterly deadlines, penalty points, reactive accountant fees) is materially larger. The £30k threshold from April 2027 catches almost everyone currently on the edge of £50k anyway.