In short: Making Tax Digital for Income Tax Self Assessment (MTD ITSA) started for individual landlords with combined self-employment and property income above £50,000 from April 2026, extending to £30,000 from April 2027 and £20,000 from April 2028. On top of the abolition of the FHL regime applied from April 2025, this is the second material tax-compliance imposition in two tax years — and it happens at the same moment that registration and planning-enforcement operations are being built out. The practical implication for planning: get your position clean now.
STL Solutions does not give tax advice — we are planning and legal consultants; our sister firm STL Accounting and Finance handles the accounting side. But the tax and planning positions of an operator do not sit in separate boxes, and operators considering MTD compliance should think about it in the same conversation as their planning position.
What MTD ITSA does
MTD ITSA requires individual taxpayers with combined self-employment and property income over defined thresholds to keep digital records and submit quarterly updates to HMRC:
- From April 2026: £50,000 combined gross qualifying income.
- From April 2027: £30,000.
- From April 2028: £20,000.
For holiday-let owners, the practical effect is fourfold:
1. Quarterly, not annual, updates. Aggregated UK property business income and expenses go to HMRC in quarterly updates plus an annual final declaration. (Contrary to some earlier commentary, quarterly updates report the UK property business in aggregate — they are not per-property.) 2. Digital record-keeping. Paper diaries and spreadsheets are, in most cases, no longer sufficient. 3. Reconciliation across platforms. Airbnb, Booking.com, Vrbo income streams need to be captured and reconciled in a form HMRC can accept. 4. Higher compliance cost. Whether provided by accountant, software or a combination.
Why this matters to the planning-status conversation
The overlap that operators should think about is this: MTD ITSA builds a more granular, quarterly, digital record of an operator's UK property business income. HMRC holds that data. Separately, the English registration scheme and the Welsh registration scheme create address-level lists of short-let properties held by councils. In Scotland, the equivalent list has existed via licensing since October 2022 (mandatory from 1 October 2023).
HMRC information is subject to strict statutory confidentiality under section 18 of the Commissioners for Revenue and Customs Act 2005, and cannot lawfully flow to a local planning authority absent a specific statutory gateway. That is not a comfort for operators whose planning position is unresolved: the address-level council registers, the Cabinet Office / Airbnb data-sharing partnership, and platform-level DAC7 reporting to HMRC already generate an increasingly complete picture without needing an HMRC-to-council pipeline.
For an operator whose planning position is clean and evidenced, this convergence is a compliance cost, not a strategic threat. For an operator whose planning position is unresolved, the convergence tightens the noose. The gap between "known" and "acted on" is where enforcement operations grow.
What operators should do
1. Get MTD-ready with a suitably-qualified accountant. This is a tax matter, not a planning matter — our sister firm STL Accounting and Finance is set up to handle it. 2. In parallel, address planning status. The two conversations should happen in the same quarter, not in sequence. 3. Where the use qualifies for a Certificate of Lawfulness, apply now. The Certificate is durable protection that no future data-sharing arrangement extinguishes.
Sources: HMRC - Making Tax Digital for Income Tax overview; HMRC - When to sign up for Making Tax Digital for Income Tax; Commissioners for Revenue and Customs Act 2005, section 18 (confidentiality).
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