Making Tax Digital for Accountants: Complete Guide to MTD for Income Tax (2026)

Making Tax Digital (MTD) is the biggest shake-up to tax administration in a generation, and for accountants the next big wave — MTD for Income Tax — begins in April 2026. If you act for sole traders or landlords, a large part of your client base is about to change how it keeps records and reports to HMRC. This guide covers what's changing, the mandation timeline, and how to get your practice ready. For a client-facing overview, see our MTD guide for small businesses.

What is Making Tax Digital?

MTD is HMRC's programme to digitise tax. It requires businesses to keep digital records and report to HMRC using MTD-compatible software rather than manual records and one-off returns. MTD for VAT is already in force for VAT-registered businesses; MTD for Income Tax Self Assessment (ITSA) is the next stage, extending the same digital approach to sole traders and landlords.

The MTD for Income Tax timeline

MTD for Income Tax is being phased in by qualifying income (gross income from self-employment and property, before expenses), according to HMRC:

• From April 2026 — sole traders and landlords with qualifying income over £50,000.
• From April 2027 — those with qualifying income over £30,000.
• From April 2028 — those with qualifying income over £20,000.

Always confirm the latest position and any further changes on GOV.UK, as the scope and dates have been revised before.

What MTD for Income Tax requires

For in-scope clients, the regime replaces the familiar single annual Self Assessment routine with a more continuous process: keeping digital records of income and expenses, submitting quarterly updates to HMRC through compatible software, and completing a final declaration after the tax year to confirm the figures and account for any adjustments. In practice that's a shift from one filing event a year to a rhythm of regular reporting.

What it means for your practice

The change is as much commercial and operational as it is technical:

• More frequent client contact. Quarterly submissions mean four touchpoints a year instead of one — more work, but also more opportunities to add value and advise.
• Repricing recurring work. The move from annual to quarterly cycles changes the cost to serve, so recurring fees and engagement terms need revisiting.
• Software onboarding. Clients need compatible software and help getting set up — a real onboarding effort, especially for digitally resistant clients.
• Client segmentation. You'll need to identify which clients cross each income threshold and when, so the right ones are ready for the right start date.

How to get ready

The practices that handle MTD well start early. A sensible sequence: review your client list and flag everyone with qualifying income near or above each threshold; choose and standardise on MTD-compatible software; make sure your agent services account is set up so you can act for clients under MTD; begin moving clients to digital record-keeping ahead of their mandation date rather than at it; and communicate with affected clients now so the change isn't a surprise. Treating the run-up as a phased onboarding project, rather than a deadline scramble, keeps both you and your clients in control.

Turning MTD into an opportunity

It's easy to frame MTD purely as compliance overhead, but the firms that thrive treat the extra cadence as an advisory opening. Quarterly data means more timely insight into a client's numbers, which supports better cash-flow conversations, earlier tax-planning prompts and more regular advice rather than a once-a-year retrospective. Positioning the change this way — more contact, more value — helps justify revised fees and deepens client relationships, turning a regulatory requirement into a reason for clients to rely on you more, not less.

Penalties

MTD for Income Tax brings a points-based penalty system for late quarterly submissions and late payment, so helping clients stay on top of the new cadence protects them from avoidable charges. Check the current penalty rules on GOV.UK, as these are set by HMRC and can change.

Frequently asked questions

When does MTD for Income Tax start?

From April 2026 for sole traders and landlords with qualifying income over £50,000, then April 2027 for over £30,000 and April 2028 for over £20,000.

Does MTD for VAT still apply?

Yes. MTD for VAT is already mandatory for VAT-registered businesses; MTD for Income Tax is a separate, additional stage of the programme.

What counts as qualifying income?

Gross income from self-employment and property before deducting expenses. It's the figure used to decide whether and when a client is mandated.

What software do clients need?

MTD-compatible software that can keep digital records and submit quarterly updates and the final declaration. HMRC maintains a list of compatible products.

Stay ahead with Learnsignal

MTD is a moving target, and keeping your technical knowledge current is part of serving clients well through the transition. Learnsignal's tax CPD helps you and your team stay up to date with the rules as they evolve, with flexible, expert-led learning.