Making Tax Digital for Income Tax (MTD ITSA) — The Complete UK Landlord Guide (2026)

From 6 April 2026, Making Tax Digital for Income Tax Self Assessment (MTD ITSA) goes live for the first wave of UK landlords. If your combined gross property and self-employment income was over £50,000 in the 2024/25 tax year, you're in scope from day one. This is the biggest change to how landlords report tax since Self Assessment itself — and HMRC isn't going to be lenient with stragglers.

What is MTD ITSA?

Making Tax Digital for Income Tax Self Assessment is HMRC's programme to replace the annual paper-style Self Assessment return with a digital, quarterly process. Instead of filing once a year, landlords in scope must:

• Keep digital records of all rental income and expenses (no shoeboxes of receipts)
• Submit four quarterly updates to HMRC summarising income and expenses
• Submit a Final Declaration after the tax year ends, replacing the annual Self Assessment return
• Use HMRC-recognised MTD ITSA software for both record-keeping and submissions

MTD ITSA doesn't change how much tax you pay — it changes how you report it. Section 24 still applies. Capital gains still go on Self Assessment. What changes is the cadence (quarterly, not annually) and the format (digital, via API).

Who is affected and when?

MTD ITSA is being rolled out in waves based on total qualifying income:

HMRC tests the threshold against your gross income (turnover, not profit) from the relevant prior tax year — so for the April 2026 launch, HMRC checks your 2024/25 Self Assessment return. If you crossed £50,000 in that year, you'll receive a notice and must be MTD-ready by 6 April 2026.

What counts as qualifying income?

HMRC counts the following towards your MTD ITSA threshold:

• Gross rental income from UK property (residential, FHL, commercial)
• Gross rental income from overseas property
• Self-employment turnover (sole traders only — not limited company directors)

What is not counted:

• Salary or PAYE income
• Dividends from your own limited company
• Interest, savings income or investment income
• Pension income
• Capital gains

So a landlord with a £45,000 PAYE day job and £22,000 in rent would not be in scope in April 2026 — only the rental income counts towards the threshold, and £22k is under £50k.

The four quarterly deadlines

The MTD ITSA quarters run alongside the UK tax year. You can opt to use calendar quarters (April–June, July–September etc.) but the standard quarters are:

Each quarterly update is a cumulative summary of income and expenses by category — totals only, not transaction-level. The Final Declaration is where you add adjustments (capital allowances, accruals, private use, Section 24 finance cost restrictions) and confirm the figures HMRC will tax.

Quarterly update — what you actually submit

Each quarterly update sends category totals to HMRC for each property business you have. For UK property you'll typically need:

• Total rents received for the quarter
• Repairs and maintenance expenses
• Letting agent fees
• Insurance
• Legal, accountancy and professional fees
• Loan interest and finance costs (still reported here even though only relief at 20% is given)
• Other allowable expenses

You don't make any tax payments off the back of a quarterly update — they're informational. Tax is still due by 31 January after the tax year, in the same way as Self Assessment today.

The Final Declaration

The Final Declaration replaces your annual Self Assessment return. By 31 January after the tax year ends, you must:

• Finalise the figures from your quarterly updates with any year-end adjustments (capital allowances, replacement of domestic items relief, accruals)
• Apply the Section 24 finance cost restriction — quarterly updates report gross interest, but the Final Declaration calculates the 20% basic-rate tax credit
• Add any other income sources outside MTD (salary, dividends, savings, capital gains)
• Confirm and submit — at which point HMRC calculates your final tax liability

It's effectively your annual return, but built up from quarterly digital records rather than a single year-end exercise.

The penalty regime

HMRC has introduced a points-based late-submission penalty system for MTD ITSA:

• Each missed submission earns one penalty point
• For quarterly filers, the threshold is 4 points. Hit that and you get a £200 penalty
• Once at the threshold, every further late submission incurs another £200 penalty
• Points expire after a period of good compliance (typically 24 months of on-time filing)

Late payment penalties stack on top:

• 15 days late: 3% of tax owed
• 30 days late: a further 3% (6% total)
• 31+ days late: daily interest plus a 10% annualised charge

How to register for MTD ITSA

You can sign up via your HMRC Business Tax Account. The process is:

1. Log in at gov.uk's HMRC services
2. Choose "Sign up for Making Tax Digital for Income Tax"
3. Confirm your sources of qualifying income (property and/or self-employment)
4. Authorise your MTD ITSA software to connect to your HMRC account
5. If you use an accountant, your agent can also sign you up via their Agent Services Account

Once you sign up, you cannot voluntarily leave MTD ITSA — you remain in scope until your income falls below the threshold for three consecutive tax years.

What software do you need?

HMRC publishes a list of MTD ITSA-recognised software on gov.uk. To qualify, software must be able to:

• Keep digital records of every transaction (date, amount, category)
• Submit quarterly updates via HMRC's API
• Submit the Final Declaration with end-of-year adjustments
• Provide an audit trail of submissions and HMRC responses

Spreadsheets can still be part of your workflow, but only if combined with bridging software that links the spreadsheet to HMRC's API. Pure manual spreadsheets don't satisfy MTD's digital-record requirement.

How MTD ITSA interacts with Section 24

Section 24 (the mortgage interest restriction) is unchanged by MTD ITSA — but the reporting is different. In quarterly updates you report gross finance costs. In the Final Declaration you apply the 20% basic-rate tax credit, which limits your actual relief.

This means MTD ITSA doesn't reduce the tax pain of Section 24 for higher-rate landlords. If anything, the quarterly cadence forces you to confront it more often. For background on how Section 24 works, see our Section 24 guide with worked examples.

How MTD ITSA affects different landlord types

Sole-trader landlord with one property

If gross rent is over £50k (uncommon for one property unless it's a HMO or central London), you're in from April 2026. Otherwise April 2027 (£30k) or April 2028 (£20k) is your trigger.

Multi-property portfolio landlord

You almost certainly cross £50k in gross rents. Treat MTD ITSA as a forcing function to centralise your record-keeping. If you've been running spreadsheets across multiple properties, now is the time to consolidate.

Limited company landlord (SPV)

MTD ITSA does not apply to limited companies. Companies already file Corporation Tax via separate digital channels. If you're weighing up incorporation, the absence of MTD ITSA is one (small) point in favour of running through a Ltd — see our Ltd vs personal BTL comparison.

Mixed landlord (some PAYE, some rental)

Only the rental income counts towards the threshold. PAYE goes on the Final Declaration but does not need to be reported quarterly.

Holiday let landlord (FHL)

Furnished Holiday Lettings are property income for MTD ITSA. They count towards the threshold and must be reported quarterly. Note that the FHL tax regime itself was abolished from April 2025, so most FHLs are now treated as standard property businesses.

Preparing for MTD ITSA — a 90-day plan

1. Check whether your 2024/25 gross qualifying income exceeded £50,000
2. If yes — choose and trial an MTD ITSA-recognised software package now, not in March 2026
3. Move all bank statements, receipts and invoices into digital form (PDFs, photos in receipt-capture apps)
4. Open a dedicated landlord bank account if you don't already have one — it makes quarterly categorisation 10x faster
5. Talk to your accountant — many will handle the quarterly submissions on your behalf, but they'll need access to your software
6. Practice — most software lets you submit a "test" quarterly update so you can rehearse before April 2026

Common MTD ITSA myths

"I'll have to pay tax four times a year"

No. Tax is still due 31 January (and 31 July for payments on account). Quarterly updates are informational only.

"My spreadsheet is fine"

Only if you add bridging software that links it to HMRC's API. A standalone spreadsheet does not satisfy MTD.

"I can keep filing Self Assessment instead"

No. Once you're in scope, Self Assessment is replaced by the MTD ITSA quarterly process and Final Declaration. You cannot opt out unless your income drops below threshold for three years.

"My accountant will do everything"

Your accountant can submit on your behalf, but the digital record-keeping obligation is yours. You still need software, and you still need to keep records in digital form.

How OwnProperly Helps

OwnProperly was built with MTD ITSA in mind. Rent payments are tracked automatically per tenancy. Expenses are categorised against HMRC's MTD ITSA categories (repairs, agent fees, insurance, finance costs, etc.). At the end of each quarter, the quarterly update is pre-filled and ready to submit. At year end, the Final Declaration calculates Section 24 finance cost restrictions automatically.

For more on choosing software, see our 2026 comparison of UK landlord software or the dedicated MTD ITSA landlord software page.

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