MTD for Income Tax: What Landlords Above £50K Must Do Before April 2026

Most landlords we onboard at LOYALS find out about MTD for Income Tax the same way: a confusing letter from HMRC arrives in spring, the words "quarterly digital filing" appear, and the question becomes "does this actually apply to me?". The answer for around six in ten London landlords with multi-property portfolios is yes, and the start date is 6 April 2026. Less than a year away as I write this.

This post answers the questions that come up on the first call once a landlord realises they are caught: how the threshold works, what the five filings actually involve, what software you need, what the deadlines look like across a real tax year and what penalties HMRC will issue if you miss them. There is also a short checklist of things to do now, before the rules switch on.

What MTD for Income Tax actually is

Making Tax Digital for Income Tax Self Assessment, normally shortened to MTD ITSA or MTD for Income Tax, is the next phase of HMRC's long programme to move tax administration off paper and out of the once-a-year cycle. VAT-registered businesses already do this. From April 2026, sole traders and landlords above the threshold join in. HMRC sets out how the quarterly updates and final declaration work in its Making Tax Digital guidance.

The mechanics are simple in principle. You keep your rental records digitally during the year, you submit a summary of income and expenses to HMRC every three months, and at the end of the tax year you finalise the position with a single end-of-period declaration that pulls in any other income (employment, savings, dividends, capital gains). The single annual Self Assessment return goes away for the rental and trading parts. The end-of-year declaration replaces it.

So one filing turns into five. Five turns into ten if you have both rental income and self-employment, because each income source is reported separately each quarter, then rolled up at year end.

The £50,000 threshold rule (and why it surprises landlords)

The threshold catches more landlords than the published guidance suggests, and the reason is the word gross. HMRC tests qualifying income before any expenses are deducted. So a portfolio bringing in £55,000 of rent with £20,000 of allowable expenses (interest, repairs, agent fees, insurance) still has gross qualifying income above £50,000. That landlord is in MTD ITSA, even though net profit is £35,000.

Two further details matter. First, if you also have self-employed trading income, the two streams add together for the threshold test. So a freelancer with £30,000 of consultancy and £25,000 of rent has qualifying income of £55,000 and is caught. Second, the test is based on the most recent finalised tax year (so for April 2026 entry, the test year is 2024/25). That means the maths to know whether you are in or out is settled by the return you filed in January 2026.

The phasing steps down over three years. Above £50,000 of gross income, you are in from 6 April 2026. Between £30,000 and £50,000, you join from April 2027. Between £20,000 and £30,000, you join from April 2028, a threshold HMRC confirmed at the Spring Statement in March 2025. Below £20,000 there is no entry date yet, and that population is still under review. HMRC's guidance on when MTD for Income Tax applies is where to confirm your own date.

Should I switch structure or stay an individual landlord?

This is the call the £50K-plus landlord population usually wants to make in the lead-up to April 2026. The decision is rarely just about MTD. Section 24 (the mortgage interest restriction that started in April 2017 and fully bedded in by 2020/21) already removed the ability to deduct mortgage interest as an expense for individual landlords, replacing it with a basic-rate tax credit (HMRC explains the restriction with worked case studies). From April 2027, property income will get its own separate higher rates of 22%, 42% and 47% for England, Wales and Northern Ireland, which lifts the effective rate for higher-rate landlords by around 2 percentage points on the rental slice.

Limited company landlords avoid both of these. They pay Corporation Tax on rental profit (19% to 25% depending on profit), get full mortgage interest relief, file CT600 returns instead of Self Assessment, and sit entirely outside MTD ITSA. The trade-offs are extraction tax (dividends or salary) when you take cash out, mortgage portability (a remortgage to a Ltd Co structure crystallises CGT and SDLT) and the cost of running a company.

The five filings: what each one looks like

If you stay an individual landlord, here is what the year actually involves. Each quarterly submission is a summary of rental income and expenses for the quarter, broken down by property where you have multiple. Categories follow a fixed list (rent received, repairs, insurance, mortgage interest, agent fees, professional fees, utilities, finance costs and so on). The submission has to be cumulative, meaning each quarter restates the year-to-date totals rather than just the latest three months. Most software handles that automatically. If you want a plain-English breakdown of one specific deadline, read what to submit for the quarterly update due 7 November 2026.

The four quarterly submissions cover these standard periods for the 2026/27 tax year:

• Quarter 1: 6 April to 5 July 2026, deadline 7 August 2026
• Quarter 2: 6 July to 5 October 2026, deadline 7 November 2026
• Quarter 3: 6 October 2026 to 5 January 2027, deadline 7 February 2027
• Quarter 4: 6 January to 5 April 2027, deadline 7 May 2027
• Final declaration: for the full 2026/27 year, deadline 31 January 2028

The final declaration is the key one. That is where adjustments get made (capital allowances, private use, accruals, finance cost restriction under Section 24), where any other untaxed income gets reported (employment, dividends, interest, capital gains), and where the actual tax liability is calculated. The four quarterly submissions during the year are running summaries, not final figures. So nothing the four quarters say is binding until the year-end declaration ties it all together.

Tax payments still follow the existing Self Assessment rhythm: balancing payment by 31 January following the year, and two payments on account by 31 January and 31 July if applicable. MTD does not change the payment dates. It only changes the reporting cycle.

Software requirements (and what we actually use for clients)

HMRC will only accept submissions through MTD-recognised software. Spreadsheets are still acceptable in principle, provided they connect to HMRC via approved bridging software, but in practice most landlords find that approach more painful than just using a proper bookkeeping app. The list of recognised software is long and growing. The four most-used products with our landlord client base are FreeAgent, Xero, QuickBooks Online and 123 Sheets.

FreeAgent is bundled free with NatWest, Royal Bank of Scotland and Mettle business banking, which makes it the most cost-effective option for small portfolios. Xero is the most powerful for portfolios above five properties and integrates well with most letting agents' export feeds. QuickBooks Online sits between the two on capability and cost. 123 Sheets is a low-cost option for landlords who already keep their records in Excel and want to bridge into MTD without changing workflow. Whichever route, the software must handle digital record keeping (no manual transposition between bank statement and submission), all four quarterly submissions and the year-end declaration.

Penalties: the new points-based system

One detail surprises landlords, and some accountants too: for the first MTD year, 2026/27, HMRC will not charge a penalty for a late quarterly update. You still have to file it, but a slip does not cost you a penalty in year one. From 2027/28 the points-based system switches on properly, mirroring the VAT regime HMRC introduced in January 2023. You get one point per missed quarterly or final deadline. Reach the threshold, 4 points for quarterly filers, and a £200 penalty applies, plus another £200 for every further miss until the points clear (they expire after 24 months of compliant filing). HMRC's penalties guidance for MTD for Income Tax confirms both the no-penalty first year and the points thresholds.

Late payment of tax is a separate cost, and unlike the quarterly updates it can bite in year one. Interest runs from day one throughout (7.75% as at January 2026, the Bank of England base rate plus 4 percentage points, per the HMRC interest rates page). On the penalty side HMRC gives a longer grace in this first year: you have 30 days from the due date to pay or agree a Time to Pay before any late payment penalty applies, and that grace drops to 15 days from the second year. After it, a first penalty of 3% of the unpaid tax applies, a further 3% at day 30, and a 10%-per-year charge accrues daily thereafter.

What this means for you (and what to do now)

If your gross rent for 2024/25 was above £50,000, the practical question is not whether to comply with MTD but whether to comply as an individual landlord or move the portfolio into a limited company before April 2026. That decision needs proper modelling, because incorporation crystallises CGT on the unmortgaged equity in the properties at the moment of transfer, and triggers SDLT on the market value, unless you qualify for incorporation relief and stamp duty relief through a partnership structure (which has its own tests and conditions).

If you decide to stay individual, here is the LOYALS pre-April-2026 checklist:

• Confirm whether your 2024/25 gross rent crossed £50,000 (your Self Assessment return is the source of truth)
• Pick MTD-recognised software and set it up with bank feeds and property categories
• Enrol for MTD ITSA via your HMRC business tax account once enrolment opens for 2026/27 entrants
• Authorise your accountant as MTD ITSA agent (if you use one)
• Run a parallel quarter on real data before April 2026 to spot category gaps
• Diary the four 2026/27 quarter end dates: 5 July 2026, 5 October 2026, 5 January 2027, 5 April 2027
• Confirm the deadlines: 7 August 2026, 7 November 2026, 7 February 2027, 7 May 2027
• Block out time for the final declaration deadline of 31 January 2028

The most common failure mode we see at this point in the cycle is landlords leaving software setup until February or March 2026, then realising the bank feed needs three months of clean data before the first submission to make sense. Set the software up by autumn 2026 at the latest. November 2025 is better.

How LOYALS handles MTD ITSA for landlord clients

We run the full cycle so you never touch a quarterly submission. That includes setting up FreeAgent, Xero or QuickBooks for your portfolio, adding bank feeds for every account, classifying transactions in real time during the quarter, filing the four quarterly submissions before each deadline, preparing and filing the final declaration, calculating the Section 24 finance cost restriction correctly, and applying any reliefs (Replacement of Domestic Items, capital allowances on common-area items, Rent-a-Room if you have a lodger). We also run a 12-month tax projection at the end of each quarter so you can see the bill coming and plan for it.

If you are already running on FreeAgent, Xero or QuickBooks, we can plug into your existing system within 48 hours of engagement. If you are starting from scratch, the typical setup takes around two weeks: bank account permissions, property records, opening balances, historic categorisation. After that the maintenance is light, and the quarterly cycle becomes routine. Our extended hours (Monday to Saturday, 10am to 7pm) suit most landlords we serve, who tend to call between site visits or after evening viewings.

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