Mandatory from 6 April 2026 for self-employed and landlords with income over £50,000. No late-submission penalties in Year 1 — but legal compliance is still required.

Making Tax Digital (MTD) for Income Tax Self Assessment became mandatory from 6 April 2026. If you are self-employed or receive rental income and your gross qualifying income exceeds £50,000, you are now legally required to keep digital records and submit quarterly updates to HMRC using approved software. The annual Self Assessment return as you have known it is being replaced.

This is one of the biggest changes to UK tax administration in decades, yet many affected taxpayers are still unaware they must act immediately.

MTD for Income Tax — Who Is Affected and When

What Is Gross Qualifying Income?

Gross qualifying income means your total income from self-employment and/or property before expenses — not your profit. If you are both self-employed and a landlord, both income streams are added together. This catches more people than many expect: a self-employed person earning £35,000 and a landlord earning £20,000 from rental income would have combined qualifying income of £55,000 — above the £50,000 threshold.

How MTD Works — The New Process

Under MTD for Income Tax, your annual tax process changes from one submission to a quarterly cycle plus a final declaration:

Deadlines assume a standard April–March tax year. Your quarterly summaries are running totals, not final tax computations. Tax is still calculated and paid by 31 January.

What You Need to Do Right Now

1. Check if you are in scope. Add up your gross self-employment income and gross rental income. If the combined total exceeded £50,000 in your most recent tax year, you are required to comply from 6 April 2026.

2. Choose MTD-compatible software. You must use HMRC-approved software to keep digital records and submit quarterly updates. HMRC publishes the approved list on GOV.UK. Common options include Xero, QuickBooks, FreeAgent, and a growing number of landlord-specific apps. Some are free; others cost £10–£30/month.

3. Register for MTD with HMRC. You must sign up through your HMRC online account or ask your accountant to sign you up on your behalf. Do not wait — registration takes time to process.

4. Start digital record-keeping immediately. Your Q1 quarterly update (April–June 2026) is due by 7 August 2026. You need digital records from 6 April to submit this accurately.

5. Tell your accountant. If you use an accountant, confirm they are registered as an MTD agent and are using compatible software for your submissions.

Penalties — What You Need to Know

HMRC has confirmed there will be no late-submission penalties during 2026/27 — the first year of mandatory MTD. This is a grace period to allow businesses and landlords time to adapt. However, legal compliance is still required, and the penalty regime begins in full from 6 April 2027. Penalties for late submissions will operate on a points-based system, accumulating to a fixed £200 penalty once a threshold is reached.

This article is for informational purposes only and does not constitute financial advice. Always verify rates and rules with official sources before making any financial decision.

Frequently Asked Questions

Sources: HMRC GOV.UK (Making Tax Digital for Income Tax), Finance Act 2026, Morningstar UK, Armstrong Watson, PocketWise.