Making Tax Digital for Income Tax: What UK Landlords Need to Know

From 6 April 2026, HMRC is phasing in the biggest change to Self Assessment in a generation: Making Tax Digital for Income Tax (MTD ITSA). If you're a UK landlord who currently sends one tax return a year, this changes what "filing" means in practice — digital records, MTD-compatible software, and four updates a year in place of a single annual return. It isn't just a change of format. Once the new rules apply to you, a missed quarterly update or a late return starts building towards real penalties. This guide sets out who has to join and when, what changes in practice for landlords, how the new points-based penalty regime works, and what to do now to get ahead of it. It is general information only and does not replace personalised advice from a qualified UK property tax adviser.

What is Making Tax Digital for Income Tax?

Making Tax Digital for Income Tax is HMRC's replacement for the annual Self Assessment tax return for landlords and sole traders above certain income levels. Instead of filing one return after the tax year ends, you keep digital records throughout the year and send HMRC a summary every quarter through compatible software, finishing with a year-end final declaration that confirms your total income and tax due. The legal framework sits in Schedule A1 to the Taxes Management Act 1970, inserted by the Finance Act 2019, and given day-to-day effect through the Income Tax (Digital Obligations) Regulations 2026, which came into force on 1 April 2026. HMRC's stated aim is to reduce the error and delay that comes from a single annual reconciliation by giving both the landlord and HMRC a clearer, more current picture of income across the year.

Who has to join, and when?

Whether and when you have to join depends on your qualifying income — your total gross income from self-employment and property combined, before expenses, based on the tax return you most recently submitted. HMRC reviews this every year and will write to confirm if you need to start, but checking is your responsibility (or your agent's) regardless of whether a letter arrives.

You don't have to start using Making Tax Digital for Income Tax until after you've submitted the Self Assessment return that establishes your qualifying income for the relevant year — so your 2025–26 return, filed by 31 January 2027, is what determines whether you join from April 2027. If you believe you meet a threshold but haven't heard from HMRC, it's still your responsibility to check and sign up.

What changes in practice for landlords

The most visible change is the move from one annual submission to five. Four quarterly updates report cumulative income and expense totals for your property business, sent through your software by 7 August, 7 November, 7 February and 7 May. After the fourth update, you submit a final declaration — through the same software — that pulls together income from all your sources, applies your reliefs and allowances, and confirms your tax liability for the year. This final declaration effectively replaces the old SA100, though the 31 January filing and payment deadline is unchanged. Digital records means exactly that — each transaction (rent received, letting agent fees, repairs, insurance, mortgage interest restriction, and so on) needs to be recorded in your software as it happens, rather than reconstructed from bank statements and receipts once a year. If you run more than one property business, or have both a property business and a sole trade, each is tracked separately within the same qualifying income test.

The new penalty regime

Making Tax Digital for Income Tax brings a new, points-based penalty system for late submissions, replacing the current late filing penalties for the tax years you're in the regime. You get one penalty point for each quarterly update or tax return deadline you miss — capped at one point per deadline even if you run multiple businesses. Once you reach 4 points, you're charged a £200 penalty, and a further £200 for every subsequent missed deadline. Points below the threshold expire automatically 24 months after the missed deadline. HMRC has confirmed a transitional easement: if you're mandated into Making Tax Digital for Income Tax for the 2026–27 tax year (the first wave, from the £50,000 threshold), you will not get penalty points for late quarterly updates in that first year — though late tax return and late payment penalties still apply as normal. Late payment penalties work differently and aren't points-based: broadly 3% of tax outstanding at day 15 (or none in your first year), a further 3% at day 30, and 10% a year charged daily on anything still outstanding after that.

What UK landlords should do now to get ready

1. Work out your qualifying income — add up your gross rental income and any self-employment income from your last filed tax return to see which threshold, and which start date, applies to you.
2. Choose MTD-compatible software early. Options built specifically for landlords, such as RentalBux, are designed to handle UK property, foreign property and self-employment income within one digital record — worth comparing before you're mandated.
3. Tidy up your record-keeping now. Moving from an annual reconstruction to real-time digital records is far easier if you start logging rent, expenses and mileage as you go, rather than in the month before your first quarterly deadline.
4. Consider signing up voluntarily. You can join before you're required to, which gets you used to quarterly updates — but make sure you understand the penalty rules that apply once HMRC confirms you're in.
5. Get your position reviewed. If you have multiple properties, a mix of property and self-employment income, or overseas property, a property tax adviser can confirm your qualifying income calculation and set up your software correctly from day one.

Frequently asked questions

Conclusion

Making Tax Digital for Income Tax is not optional once your qualifying income crosses the threshold for your year, and the phased rollout means the £50,000 group joining from April 2026 is only the first wave — £30,000 follows in 2027, and £20,000 in 2028, pulling in most landlords with a meaningful portfolio. The safest approach is to work out where you sit now, choose your software early, and get your record-keeping into a digital routine well before your first quarterly deadline arrives.

Sources & further reading: HMRC, Find out if and when you need to use Making Tax Digital for Income Tax; HMRC, Sign up for Making Tax Digital for Income Tax; HMRC, Penalties for Making Tax Digital for Income Tax; the Income Tax (Digital Obligations) Regulations 2026 (SI 2026/336); Schedule A1 to the Taxes Management Act 1970. This article is general information, not tax advice, and reflects HMRC guidance and legislation as at July 2026, which can change. Making Tax Digital for Income Tax is fact-specific — always confirm your own position and start date with a qualified UK property tax adviser before you rely on it.