If you own a portfolio of rentals, the first question about Making Tax Digital (MTD) for Income Tax is usually the scary one: do I now have to file separately for every single property?
The short answer is no. For MTD purposes, all your UK rentals are bundled into a single business, so a ten-property portfolio doesn't mean ten times the paperwork.
This guide explains exactly how MTD treats a portfolio, when you're caught by the rules, how foreign property is handled differently, and what your quarterly calendar looks like. We've checked every rule and figure against the relevant gov.uk guidance, and we've dated everything to the right tax year so nothing here goes stale on you.
It's written for individual landlords who report rental profit through Self Assessment. If you hold property inside a limited company, MTD for Income Tax doesn't apply to you, and you'll keep filing a company tax return instead.
Do I have to file separately for each property?
No. If you have one or more properties in the UK, they are legally treated as one "UK property business", so you report the portfolio as a single business with one set of quarterly updates, not one per property.
This is the single most important thing for portfolio landlords to understand. HMRC's guidance is explicit: you do not need to create separate digital records for each UK property you own. Your software adds the rental income and expenses together and you submit them as one stream.
So whether you have two flats or twenty, your UK rentals roll up into one property business. The number of properties affects how much bookkeeping you do behind the scenes, but it does not multiply the number of submissions.
The one big exception is foreign property, which sits in a separate business. We'll come back to that below.
When does MTD apply to me as a portfolio landlord?
MTD for Income Tax is being phased in by income level, and the threshold is what matters, not how many properties you own.
The mandation dates are:
| Phase | You're mandated from | If your qualifying income is over | Income tested for the year |
|---|---|---|---|
| Phase 1 | 6 April 2026 | £50,000 | 2024/25 |
| Phase 2 | 6 April 2027 | £30,000 | 2025/26 |
| Phase 3 | 6 April 2028 | £20,000 | 2026/27 |
So a landlord whose qualifying income was over £50,000 in 2024/25 had to start using MTD from 6 April 2026. If your income sits between £30,000 and £50,000, you're in the next wave from April 2027, and the £20,000 to £30,000 band joins from April 2028.
HMRC looks back at the qualifying income on your last submitted Self Assessment return to decide which wave you fall into. Because property income often pushes portfolio landlords over these thresholds comfortably, most established portfolios will be caught early. If you're close to a threshold, it's worth working out where you stand now rather than waiting for a letter.
How is qualifying income worked out across a portfolio?
Your qualifying income is the total income you get in a tax year from self-employment and property, and HMRC assesses your gross income, meaning income before you deduct any expenses (also called your turnover).
Two points trip portfolio landlords up here.
First, it's gross, not net. The test is your total rent received across the portfolio, not the profit after mortgage interest, repairs, agent fees and the rest. A portfolio can produce a modest profit but still sail past the threshold on gross rents alone.
Second, it aggregates. If you also run a self-employed business, that turnover is added to your gross rents. HMRC's own example combines £25,000 of rental income with £27,000 of self-employment income to reach £52,000 of qualifying income, which is over the £50,000 line.
What does not count toward the threshold: employment income through PAYE, dividends, a State Pension, and private pensions. So a landlord with a big salary and a small portfolio is tested only on the rents and any self-employment, not the salary. That salary still gets reported later at the final declaration stage, it just doesn't drag you into MTD on its own.
How does MTD treat UK property versus foreign property?
This is the rule that genuinely changes the shape of your filing if your portfolio crosses borders.
All of your UK property is one "UK property business". All of your foreign property is a separate "foreign property business". They are two different businesses for MTD, each with its own quarterly updates.
HMRC's agent toolkit and record-keeping guidance set this out clearly. If you have one or more properties in the UK, they are legally treated as one UK property business and you don't create separate digital records for each one. Separately, all of your foreign properties are legally treated as one foreign property business, and your compatible software adds those records together into their own quarterly update.
So the count of separate update streams is driven by where the property sits, not how many you own:
| Your portfolio | Separate MTD property businesses | Quarterly update streams |
|---|---|---|
| Three flats in Leeds | 1 (UK property) | 1 |
| Ten houses across England and Wales | 1 (UK property) | 1 |
| Four UK flats plus a villa in Spain | 2 (UK + foreign) | 2 |
If you also trade as a sole trader, that self-employment is a third, separate business on top, with its own updates again. The principle is consistent: one business per type, and UK and foreign property are different types.
What about jointly owned properties?
Co-owned property is common in portfolios, between spouses, family members or business partners, and MTD handles it on a share basis.
For qualifying income, only your share of the property income counts toward your threshold. HMRC's example: if you equally own a property generating £50,000 of income, only your £25,000 share counts toward your qualifying income. If you only ever receive notice of your share after expenses have been deducted, HMRC will assess that figure instead.
Your share of any jointly let UK property also forms part of your single UK property business, and your share of a jointly let foreign property forms part of your foreign property business. It doesn't create a separate stream.
There's a practical easement on expenses for jointly let property. In your quarterly updates you can choose to include either the income and expenses, or the income only. If you leave the expenses out during the year, you report them after the tax year ends, and you may need to resend your fourth quarterly update before you submit your final return. That flexibility is useful when you don't get the expense figures from a co-owner or managing agent until later.
What do quarterly updates look like for a portfolio?
Quarterly updates are not four mini tax returns. Each one is a cumulative, year-to-date summary of income and expenses for that property business, sent to HMRC through compatible software.
That cumulative point matters. Each time you send a quarterly update, it covers from the start of the tax year to the end of the update period, not just the previous three months. So if you spot an error in an earlier quarter, you correct it in the next update rather than amending the old one.
The standard quarterly periods and deadlines are:
| Quarter | Period covered | Standard deadline |
|---|---|---|
| 1 | 6 April to 5 July | 7 August |
| 2 | 6 April to 5 October | 7 November |
| 3 | 6 April to 5 January | 7 February |
| 4 | 6 April to 5 April | 7 May (following tax year) |
A portfolio landlord with only UK property sends one update per quarter, four a year, covering the whole UK portfolio. Add a foreign property business and you send a second set of four for that. Add self-employment and that's a third set.
After the year ends, you submit a final declaration. This brings together your property results with everything else, including any employment, pension and savings income, and it's where you claim your reliefs and allowances. It replaces the Self Assessment tax return and is due by 31 January following the end of the tax year, the same date you're used to. Keeping good books across the year is the difference between a smooth portfolio filing and a scramble, which is exactly where our bookkeeping services come in.
Worked example: a five-property landlord under MTD
Illustrative example. Priya is a portfolio landlord with four flats across Manchester and Birmingham, plus a one-bedroom apartment she lets out in Portugal. She has no self-employment and a part-time PAYE salary of £18,000.
Her gross rents for the year are:
| Property | Location | Gross annual rent |
|---|---|---|
| Flat A | Manchester | £14,400 |
| Flat B | Manchester | £13,200 |
| Flat C | Birmingham | £12,000 |
| Flat D | Birmingham | £11,400 |
| Apartment E | Portugal | £9,600 |
Her UK gross rents are £14,400 + £13,200 + £12,000 + £11,400 = £51,000. Adding the foreign rent of £9,600 gives total property income of £60,600.
Her £18,000 salary does not count toward the MTD threshold, so her qualifying income is £60,600. That's over £50,000, so Priya is in Phase 1 and mandated from 6 April 2026.
Here's how her filing breaks down:
- Her four UK flats are one UK property business. She sends one quarterly update covering all four, four times a year.
- Her Portuguese apartment is a separate foreign property business. She sends a second quarterly update for it, four times a year.
- That's eight quarterly updates in total across the year, not five (one per property) and not two (one per country per quarter, which would understate it).
- After the year end, one final declaration pulls together both property businesses plus her £18,000 salary, and she claims her reliefs there, due by 31 January.
The lesson for portfolio landlords: your update count is driven by how many separate businesses you have (UK property, foreign property, self-employment), not by how many doors you own. Priya's five properties create just two property update streams.
What digital records do I need to keep?
Under MTD you must keep your records digitally and maintain digital links between the programs you use. You can't simply keep a shoebox of receipts and a paper rent book.
In practice that means recording each rental transaction in compatible software, with the date, amount and a category. For a UK property business you record the income and expenses for the whole portfolio in one place; the software totals them for the quarterly update.
The digital links rule is the one that catches people out. You can't manually copy and paste figures between programs. HMRC's guidance prohibits moving records by writing them out in another cell, or using cut and paste or copy and paste, between the software that keeps your records and the software that submits to HMRC. The transfer has to be a digital link, for example a CSV import, an API, or a linked formula.
You can still use a spreadsheet to keep your records, but you'll need bridging software to digitally link the spreadsheet to HMRC's systems and make the submission. The spreadsheet on its own can't file.
You'll need to use software that's compatible with MTD for Income Tax. HMRC publishes a list of compatible products, and the right choice for a portfolio depends on how you already track rents and whether you co-own with anyone. We help landlords pick and set up a system that fits the portfolio rather than the other way round; see our landlord accounting page for how we work with property clients.
What happens if I miss a deadline?
MTD for Income Tax uses a points-based late submission penalty system. For each quarterly update or return deadline you miss, you get a penalty point. Once you reach 4 points you get a £200 penalty, and a further £200 each time you miss another deadline after that.
There are also late payment penalties on tax paid late, which step up the longer the bill is outstanding. The exact percentages depend on the tax year, so we'd point you to HMRC's penalty guidance (linked in Sources) for the current figures rather than quote a number that may have moved.
For portfolio landlords running more than one property business, the points risk is simply that there are more deadlines to hit. Two property businesses mean two sets of quarterly updates, so it pays to set the dates out on a calendar at the start of the year.
Frequently asked questions
Do I file a separate MTD return for each rental property?
No. All your UK rentals are treated as one UK property business, so you make one set of quarterly updates for the whole UK portfolio, however many properties you own. Foreign property is a separate business with its own updates.
How many quarterly updates does a portfolio landlord send?
It depends on how many separate businesses you have, not how many properties. UK property is one business (four updates a year). Foreign property is a separate business (another four). Self-employment, if any, is a third. A UK-only portfolio of any size sends four quarterly updates a year.
Does my rental income count as gross or net for the MTD threshold?
Gross. HMRC tests your qualifying income on total income before expenses, so it's the rent you receive across the portfolio, not the profit after mortgage interest and costs. Property and self-employment income are added together; employment, pension and dividend income don't count.
How is jointly owned property treated under MTD?
Only your share of the income counts toward your qualifying income threshold, and your share forms part of your UK or foreign property business as appropriate. For jointly let property you can report income only in your quarterly updates and add the expenses after the year end, resending the fourth update if needed.
Are quarterly updates four separate tax returns?
No. Each update is a cumulative, year-to-date summary, not a standalone return. The final declaration after the tax year is where you bring in other income, claim reliefs, and finalise the position. It replaces the Self Assessment return and is due by 31 January.
Does MTD apply if I hold my properties in a limited company?
No. MTD for Income Tax is for individuals who report property profit through Self Assessment. A property company files a Corporation Tax return instead, so MTD for Income Tax doesn't apply to those properties.
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Get your portfolio MTD-ready
Running multiple properties under MTD is manageable once the records and software are set up properly, with one clean UK property business and any foreign property handled separately. Get the structure right once and the quarterly updates become routine.
Want help getting your portfolio ready for Making Tax Digital? Book a call with a Zmartly accountant and we'll set up your digital records and quarterly updates so you stay compliant without the stress. See our bookkeeping services or our dedicated support for landlords to get started.
