If you let property and your rental income has crept over the Making Tax Digital threshold, you're probably asking one practical question: do you now have to log into software every three months yourself, or can you just hand it to your accountant like you always have?
The short answer is that yes, your accountant can do it for you. But MTD for Income Tax is not quite the same as the old Self Assessment hand-off, and the way the work splits between you and your agent matters.
This guide is for UK landlords (and landlords who also have self-employment) who want to know exactly what an accountant can file under MTD, what they need from you, and where your own responsibilities start and stop. Every rule below is checked against current gov.uk guidance, and figures are dated to the tax year they apply to.
Can my accountant file MTD for Income Tax on my behalf?
Yes. An authorised tax agent can submit your quarterly updates and your final declaration for you under Making Tax Digital for Income Tax, using compatible software linked to their agent services account. You don't have to file anything yourself.
HMRC's agent toolkit is explicit about this. To act for you, your accountant needs an agent services account, which gov.uk describes as a "secure HMRC account" that is "essential for accessing digital tax services". That account has to "hold authorisation from your client giving you permission to act for them".
Once that's in place, a main agent "can see and do almost everything that their client can do online, including finalising tax returns and viewing tax calculations". In other words, the accountant relationship you already have can carry straight over into MTD. What changes is the rhythm of the work, not who's allowed to press the button.
Does MTD even apply to me as a landlord?
Before worrying about who files, check whether you're actually in scope. Mandation is being phased in by income level.
| Phase | Mandation date | Qualifying income over | Based on the return for |
|---|---|---|---|
| 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 |
Two things trip landlords up here.
First, "qualifying income" is your gross income, before expenses. gov.uk defines it as "your gross income (income before you deduct expenses, also called your turnover)". So it's your total rent received, not your profit after mortgage interest, agent fees and repairs. A landlord whose rent comes to £55,000 but who only makes £8,000 of profit is still over the £50,000 line.
Second, it aggregates. Qualifying income is "the total income you get in a tax year from self-employment and property" added together. If you have a small side trade and some rental income, you combine the gross figures from both.
Employment and pension income do not count toward the threshold. gov.uk lists "employment (PAYE)", "dividends (including those from your own company)", a "State Pension" and "private pensions" as income that is not qualifying income. Those still get reported at the end of the year, but they don't push you into MTD.
If you're new to letting and want the wider picture on what's deductible and how property profits are taxed, our guide for landlords is a good starting point.
What exactly does my accountant file under MTD?
Under MTD for Income Tax there are two kinds of submission, and an authorised agent can handle both.
Quarterly updates
Every three months, your accountant sends HMRC a summary of your property income and expenses, generated from the digital records. These are not four mini tax returns. Each one is cumulative. As gov.uk puts it, "each time you send a quarterly update it will cover from the start of the tax year to the end of the update period, not just the previous three months".
That cumulative design is forgiving. If a figure was wrong in an earlier quarter, the next update simply restates the corrected year-to-date totals.
If you have UK rental property, all of it is treated as a single business. gov.uk states that "if you have one or more properties in the UK, they are legally treated as one 'UK property business' and you do not need to create separate digital records for each UK property that you have". Foreign property is separate: "all of your foreign properties are legally treated as one 'foreign property business'". So a landlord with UK flats and a Spanish villa files two property businesses, not one combined return and not one per flat.
The final declaration
After the tax year ends, your accountant submits a final declaration. This is the step that pulls everything together, applies your reliefs and allowances, and confirms the figures are correct. It replaces the annual Self Assessment tax return you used to file for your property income. gov.uk confirms you "must submit your tax return by 31 January following the end of the relevant tax year", and that an agent can do this "only" if they are your "main agent".
This is also where non-MTD income (employment, pensions, dividends, savings) is reported, even though it never counted toward the threshold.
What does my accountant need from me first?
For an agent to file on your behalf, three things have to be in place.
- An agent services account. Your accountant sets this up; it's their secure HMRC account for MTD work. You don't need to do anything here.
- Authorisation to act for you. You confirm a digital handshake so HMRC links you to your agent. Without this, the agent's account "will need to hold authorisation from your client" before they can act.
- Compatible software. The quarterly updates and final declaration must go through software that works with MTD for Income Tax. If you keep records in a spreadsheet, that can still work, but it has to be connected to HMRC through bridging software.
That last point matters because MTD requires genuine digital records and digital links. You can't keep a shoebox of receipts and have your accountant retype the totals once a year. Records must be digital, and where they move between programs the connection has to be a real digital link, not manual copy-paste. For spreadsheet users, gov.uk describes bridging software that "will connect to existing records kept in spreadsheets or other accounting tools".
In practice, the most useful thing you can do is get your bookkeeping flowing into the software regularly, so your accountant isn't scrambling at each quarter end. If you'd rather not touch the software at all, we can run the self-assessment and MTD filing service end to end for you.
Main agent or supporting agent: what's the difference?
MTD introduces a distinction that didn't really exist under old Self Assessment, and it's worth understanding if more than one firm touches your affairs.
| Capability | Main agent | Supporting agent |
|---|---|---|
| Prepare and send quarterly updates | Yes | Yes |
| Submit the final declaration / tax return | Yes | No |
| View tax calculations | Yes | No |
| See all your income sources | Yes | No |
gov.uk says main agents "can see and do almost everything that their client can do online, including finalising tax returns and viewing tax calculations". Supporting agents "have limited access" and "cannot submit tax returns or view all income sources".
For most landlords with one accountant, that accountant is your main agent and does the lot. The supporting role mainly matters where a bookkeeper handles the quarters and a separate firm finalises the year. If your accountant files everything for you, they need to be set up as your main agent.
What stays my responsibility, even with an accountant?
Handing the filing to an agent does not hand over the legal responsibility. A few things remain yours.
- The accuracy of the underlying records. Your accountant files what your records show. Missing rent or forgotten expenses are still your liability.
- Telling your accountant about changes. New property, a property sold, a new tenant, a move abroad: these affect your MTD obligations, and the agent can only act on what they know.
- Paying the tax. Filing and paying are separate. The money is still due, and late payment carries its own penalties.
- Checking before the final declaration goes in. You're confirming the figures are correct, even when the agent presses submit.
MTD also has its own penalty regime. Late submissions work on points: you get a point for each missed quarterly update or tax return deadline, and once you reach 4 points you get a "£200 penalty", plus a further "£200 penalty each time you miss another submission deadline" after that. Late payment is charged separately as a percentage of the tax owed. An agent reduces the risk of missing a deadline, but the penalties land on you, which is exactly why the deadline calendar below is worth pinning up.
The MTD deadline calendar for landlords
These are the standard quarterly update deadlines under MTD for Income Tax, followed by the final declaration. The standard quarters run to 5 July, 5 October, 5 January and 5 April, with these submission dates:
| Submission | Covers (cumulative, from start of tax year to) | Deadline |
|---|---|---|
| Quarter 1 update | 5 July | 7 August |
| Quarter 2 update | 5 October | 7 November |
| Quarter 3 update | 5 January | 7 February |
| Quarter 4 update | 5 April (tax year end) | 7 May |
| Final declaration | The whole tax year | 31 January (following the tax year) |
You can opt for calendar quarters in your software instead, which shifts the period ends slightly, but the principle is the same: four updates, then one final declaration by 31 January.
Illustrative example: a landlord who hands everything to an agent
Illustrative example. Priya is a UK landlord with two let flats. For 2024/25 her gross rents totalled £62,000, so she's over the £50,000 line and within MTD for Income Tax from 6 April 2026, for the 2026/27 tax year onwards. Her profit after mortgage interest, letting agent fees and repairs is far lower, but mandation is judged on the gross £62,000, not the profit.
Priya doesn't want to touch the software. She appoints her accountant as her main agent. Her accountant sets up the agent services account, Priya completes the digital authorisation, and her bank feed and expense receipts flow into compatible software through the year.
Across 2026/27 her accountant files four cumulative quarterly updates, by 7 August 2026, 7 November 2026, 7 February 2027 and 7 May 2027. Because both flats are UK property, they're reported as a single UK property business, not two.
After the tax year ends, the accountant prepares the final declaration, claims Priya's reliefs and allowances, reports her other income, and submits by 31 January 2028. Priya reviews the figures and the tax due, confirms they're right, and pays. She never logged into HMRC herself, and that's entirely allowed under MTD.
This example uses MTD thresholds and deadlines from gov.uk; the income figures are illustrative.
Frequently asked questions
Can my accountant submit my MTD quarterly updates for me?
Yes. Once you've authorised them through their agent services account, your accountant can prepare and submit your quarterly updates using MTD-compatible software. Both main agents and supporting agents are allowed to send quarterly updates on your behalf.
Can my accountant submit my final MTD declaration too?
Yes, provided they are set up as your main agent. gov.uk confirms you can only submit a client's tax return under MTD if you are the client's main agent. A supporting agent can prepare the quarters but cannot submit the final declaration.
Do I still need to do anything myself if my accountant files MTD?
You don't file, but you stay responsible for the accuracy of your records, for telling your accountant about changes, for paying the tax on time, and for confirming the figures before the final declaration is submitted. The legal responsibility for the return remains yours.
Does MTD apply if my rent is high but my profit is small?
It can. The MTD threshold is based on qualifying income, which gov.uk defines as gross income before expenses. So it's your total rent received that's measured against £50,000 (from April 2026), not your profit after costs.
My properties are in the UK and abroad. How are they filed?
All your UK properties together count as one UK property business, and all your foreign properties together count as one foreign property business. They're reported separately, so a landlord with both files two property businesses, with their own digital records and quarterly updates.
Can I keep using a spreadsheet under MTD?
Yes, but it has to be digitally linked to HMRC through bridging software. MTD requires digital records and digital links, so you can't manually retype totals from a spreadsheet into a separate program; the connection has to be a genuine digital link.
