Making Tax Digital (MTD) developments in the United Kingdom

Scope and changes to MTD

MTD continues to evolve with a major extension to Income Tax Self Assessment reporting. MTD for Income Tax (often abbreviated as MTD for ITSA) will become mandatory from 6 April 2026 for individuals whose annual self‑employment and/or property income exceeds £50 000. The regime will be phased such that those with income above £30 000 will become subject from April 2027 and above £20 000 from April 2028. This replaces the traditional annual paper or online tax return with a system of digital bookkeeping and quarterly reporting to HMRC. MTD for VAT remains fully compulsory for VAT‑registered businesses with digital record‑keeping and electronic returns.

Record‑keeping and software requirements

Under MTD for income tax, taxpayers must keep digital records of all income and expenses related to self‑employment and property, using HMRC‑recognised software capable of digital links to HMRC systems. Traditional standalone spreadsheets are acceptable only if they are linked to appropriate software that submits data digitally to HMRC. The system relies on compliant software to handle digital record‑keeping, preparation of quarterly summaries and the submission of an end‑of‑period declaration.

Software needs to support the specific MTD workflows for quarterly data submissions and linkage to HMRC APIs. HMRC has published an end‑to‑end service guide showing how integrations work so that software developers and practitioners understand how to authorise and connect systems for clients or their own businesses. (HMRC Developer Hub)

Timelines and reporting cycles

For those in scope from April 2026, quarterly data submissions will replace the classic annual Self Assessment return. Practically this means at least four update submissions spread through the year plus a final declaration after the end of the tax year. Some taxpayers could make more submissions if they have multiple income streams. Initial deadlines for quarterly updates start from the tax year beginning April 2026, with the first submission due after the first quarter ends.

Agent services and HMRC guidance

Agents must be authorised to act on behalf of their clients within the MTD system and will play a central role in helping clients register, select compatible software, set up HMRC connections and ensure workflows meet digital record‑keeping obligations. HMRC guidance explains how agents can sign clients up and manage submissions using their agent services accounts. HMRC also provides step‑by‑step guides for both taxpayers and agents on signing up, preparing digital records, and handling quarterly updates.

Exemptions and digital exclusion

MTD legislation includes provisions for exemptions. Digital exclusion is acknowledged as a ground for exemption if it is genuinely impractical for an individual to comply using digital tools. HMRC aims to process exemption applications within a set period, and there are legally defined appeal periods if an exemption is refused. Taxpayers remain obliged to comply with MTD requirements until an exemption is granted, so early application is advisable. Exemptions may also apply in specific circumstances such as those without National Insurance numbers or where other personal conditions make digital compliance disproportionately difficult.

Penalties and enforcement

The regime introduces more frequent reporting and the possibility of penalties for late or missing quarterly submissions and final declarations. Penalty systems similar to those for MTD VAT are expected to apply, including points‑based systems for repeated non‑compliance, though HMRC has indicated that there will be a lenient initial period that eases penalties to support early familiarisation with the system. Over time enforcement will align with other HMRC compliance frameworks for digital tax reporting.

Impact on payroll services

At present MTD does not create new payroll reporting obligations beyond existing requirements for PAYE. However, with the broader digital transformation of HMRC services, payroll data may increasingly be part of a more integrated digital tax landscape. Official payroll guidance updates remain separate from the core MTD ITSA regime but should be monitored for future changes.

Practical implications for members and qualifications

For professional bookkeepers and practitioners, the extension of MTD means that digital bookkeeping is no longer optional where thresholds are met. Continuous digital record‑keeping, regular submission of data updates and familiarity with HMRC‑approved software are now essential competencies.