Making Tax Digital (MTD) is HMRC's programme to require digital record-keeping and digital tax submissions across all major tax obligations. For accounting firms, MTD automation means using software integrations and workflow tools to handle the data collection, quarterly submission preparation, and filing steps with minimal manual intervention — turning what could be a high-frequency administrative burden into an efficient, near-automated process.

This guide covers the current state of MTD, what automation is possible, and how to build an efficient MTD workflow for your practice.

The current state of MTD

MTD for VAT: mandatory for all VAT-registered businesses since 2022. Digital record-keeping and digital VAT return submission via MTD-compatible software are required. The most common implementation is cloud accounting software (Xero, QuickBooks, Sage) connected to HMRC's MTD API. VAT returns are submitted directly from the software with one click after the practitioner reviews and approves the figures.

MTD for Income Tax Self Assessment (MTD ITSA): mandatory from April 2026 for sole traders and landlords with qualifying income over £50,000; extends to £30,000 from April 2027 and £20,000 from April 2028. Requires quarterly digital submissions of income and expenditure summaries to HMRC, with an annual finalisation at tax year end.

MTD for Corporation Tax: still at consultation stage as of 2026. No mandatory start date confirmed. Practices should monitor HMRC announcements.

What MTD automation involves

VAT automation (already operational)

For VAT-registered clients already on MTD, automation should be essentially complete:

  • Bank feeds import transactions daily into the accounting software
  • Document capture tools (Dext, AutoEntry) push purchase invoices to the software automatically
  • The VAT return is calculated from the digital records
  • The accountant reviews and approves the return figures
  • The return is submitted to HMRC via the MTD API in one step

The remaining manual steps are: the review and approval by the accountant before submission, and the chasing of any outstanding bookkeeping data before quarter end.

If your VAT clients are not yet on this fully automated pathway, the priority is getting them onto cloud accounting software with bank feeds and document capture tools. The MTD compliance is secondary to having accurate real-time data.

MTD ITSA automation for 2026 and beyond

MTD ITSA requires quarterly submissions covering income and expenditure for each self-employment and property business. For accounting firms, this creates a new quarterly touch point with each qualifying client.

The goal of MTD ITSA automation is to make the quarterly touch point as low-friction as possible — ideally, the data flows from the client's bookkeeping through to the quarterly submission with minimal manual intervention, and the accountant's time is spent on review rather than data collection.

The automation chain for MTD ITSA:

  1. Client bookkeeping (cloud software, bank feeds, document capture): transactions are recorded throughout the quarter in real time or near-real time, rather than being caught up at the quarter end.
  2. Automated data aggregation: the accounting software generates the quarterly summary figures (income and expenditure by category) automatically from the digital records.
  3. Automated review triggers: the practice management system sends an alert to the assigned team member when a client's quarter end is approaching, prompting a review of the bookkeeping completeness before submission.
  4. Automated client prompts: document request tools send reminders to clients about any outstanding items before the quarter ends.
  5. Quarterly submission: once the figures are reviewed and approved, the quarterly submission is made to HMRC via the MTD API in the accounting software — one step for the practitioner.
  6. Annual finalisation: at tax year end, the annual finalisation submission confirms the quarterly figures, applies reliefs and adjustments, and produces the final tax liability.

Building your MTD ITSA workflow

Client assessment

Before April 2026, review your client base and identify all clients who will be within the MTD ITSA scope (qualifying income over £50,000 initially). For each qualifying client, assess:

  • Are they already on cloud accounting software with bank feeds?
  • Do they have a bookkeeping process that produces quarterly-quality data, or do they currently only provide annual records?
  • What is their digital capability and willingness to engage with quarterly reporting?

Clients who only provide annual records will need to change their bookkeeping habits significantly. Start this conversation early — many will need a year of practice before the mandatory deadline to build the habit.

MTD ITSA-compatible software

All major UK cloud accounting platforms — Xero, QuickBooks, Sage, FreeAgent — support MTD ITSA. Several specialist MTD ITSA bridging tools also exist for clients whose existing software cannot connect to HMRC's MTD API directly.

For new clients coming onto your books, choose a cloud platform that supports MTD ITSA from the start of the engagement. For existing clients on desktop or spreadsheet-based bookkeeping, the migration to a cloud platform is the most significant MTD ITSA preparation task. For further reading on digital tools for accounting firms, visit the AI tools and technology for UK accountants hub.

Quarterly workflow design

Design a quarterly workflow that scales across all your MTD ITSA clients without creating a bottleneck. The workflow should:

  • Trigger automatically a defined number of days before each client's quarter end
  • Prompt the client to complete or review their bookkeeping if needed
  • Alert the responsible team member when the client data is ready
  • Include a brief review step before submission
  • Execute the submission and confirm to the client

Practice management tools (Karbon, TaxDome, Iris) can automate the trigger and notification steps of this workflow. Build it in the practice management system rather than tracking it manually in a spreadsheet.

Client communication around MTD ITSA

Many clients within the MTD ITSA scope will not yet be aware of the requirement or its implications. Proactive communication — ideally eighteen to twenty-four months before their mandatory start date — gives them time to adapt.

The communication should explain: what MTD ITSA requires, how it will affect their current record-keeping approach, what the practice will do to help, and what the cost implications are if additional quarterly bookkeeping or submission services are required.

Framing MTD ITSA as an opportunity to improve clients' real-time financial visibility — rather than purely as an additional compliance burden — is a more positive message and often resonates well with business-owner clients who want better visibility of their financial position throughout the year.

Common MTD automation challenges

Incomplete bookkeeping at quarter end: MTD ITSA quarterly submissions must reflect the actual records for the period. Clients who provide records late or incompletely create a quarterly bottleneck. Address this through automated reminders and clear expectations about cut-off dates.

Multiple income sources: clients with both self-employment and rental income must submit separately for each business under MTD ITSA. Ensure the accounting software tracks these separately and that the MTD submission covers both.

Software compatibility for complex clients: clients with complex tax affairs (multiple businesses, foreign income, investment portfolios) may not fit neatly into standard cloud accounting software. Identify these clients early and discuss bespoke solutions.

Client resistance to digital record-keeping: some clients, particularly older or less digitally confident clients, will resist the move to cloud bookkeeping. Allow significant lead time and provide hands-on support for these clients.

Key takeaways

  • MTD for VAT is already operational — if your VAT clients are not on a fully automated pathway (cloud software, bank feeds, document capture, API submission), addressing this is the immediate priority.
  • MTD ITSA is mandatory from April 2026 for qualifying income over £50,000; the scope expands to £30,000 in 2027 and £20,000 in 2028 — review your client base now and start preparation conversations.
  • The goal of MTD ITSA automation is to make quarterly submissions low-friction: real-time bookkeeping feeds into automatic quarterly summary generation, with the accountant's time spent on review rather than data collection.
  • Build your quarterly MTD ITSA workflow in your practice management system, not in a spreadsheet — automation at scale requires systematic workflows, not manual tracking.
  • Start client communication about MTD ITSA eighteen to twenty-four months before mandatory start dates; many clients need significant time to adapt their record-keeping habits.

Frequently asked questions

What software do I need to submit MTD ITSA quarterly updates?

You need MTD-compatible software that can connect to HMRC's MTD for Income Tax API. All major UK cloud accounting platforms — Xero, QuickBooks, Sage, FreeAgent — are MTD ITSA-compatible. Several specialist bridging tools are also available for clients whose existing software cannot connect to HMRC directly. HMRC maintains a list of compatible software on GOV.UK.

Do clients need to file quarterly under MTD ITSA themselves, or can the accountant do it?

The accountant can file quarterly submissions on behalf of clients who have authorised them as their agent. Existing agent authorisation covers MTD ITSA submissions for authorised agents. Clients who are not represented by an accountant must file quarterly themselves using HMRC-compatible software.

What happens if a client misses a quarterly MTD ITSA submission deadline?

Late quarterly submissions under MTD ITSA will attract penalty points under HMRC's new points-based penalty regime. Points accumulate for each late submission; once the threshold is reached, a fixed financial penalty applies. The points-based system is designed to allow for occasional late submissions without immediate financial penalty, but persistent lateness results in fines. Maintaining a proactive workflow with automated reminders significantly reduces the risk of missed submissions.

Is MTD ITSA the same as self assessment?

MTD ITSA replaces the current self assessment system for qualifying taxpayers. Instead of one annual return, qualifying taxpayers make four quarterly submissions of income and expenditure, followed by an annual finalisation at year end that applies reliefs, adjustments, and calculates the final tax liability. The annual finalisation replaces the self assessment return for qualifying taxpayers within the MTD ITSA scope.

Do partnerships need to comply with MTD ITSA?

General partnerships are subject to their own MTD ITSA timeline, which is separate from the sole trader and landlord timeline. The mandatory start date for general partnerships has not been confirmed as of 2026 — HMRC has indicated this will follow the sole trader rollout. Practices with partnership clients should monitor HMRC announcements for updates on the partnership MTD ITSA timeline.