Making Tax Digital for Income Tax changed how you report your rental profits, but it did something else that's easy to miss: it brought in a new penalty regime for paying late. If you're a landlord who's been signed up to MTD from 6 April 2026, the old "12% surcharge after 30 days" rules no longer apply to you. A different, staged system does.
The good news is the mechanism is predictable once you understand it. The bad news is that the longer your tax sits unpaid, the more it costs, and a daily interest charge keeps running until you clear the balance.
This guide walks through exactly what a landlord pays under MTD if the tax bill is late, when each charge bites, the first-year grace period that softens 2026/27, and the simple habits that keep you out of penalty territory. All figures here are dated to a tax year and taken from current gov.uk guidance.
What is the MTD late payment penalty for landlords?
If you're in MTD for Income Tax and you pay your tax late, HMRC charges you in stages: nothing for the first 15 days, a first penalty calculated on what's outstanding at day 15, a second penalty based on what's still outstanding at day 30, and daily late-payment interest on top. For 2026/27, a first-year easement is expected to mean no late-payment penalty applies if you clear the bill within 30 days of the due date. The specific percentages below are the rates HMRC has announced for the new regime; treat them as the published figures rather than settled numbers, and confirm the rate for your year against gov.uk before you rely on it.
That answer-in-a-sentence hides a fair bit of detail, so let's break it down properly.
Which landlords are in MTD, and from when? {#which-landlords-are-in-mtd}
You're caught by these rules only once you're actually mandated into MTD for Income Tax. The phase-in runs by qualifying income:
| Phase | You must use MTD from | If your qualifying income is over | Based on the tax year |
|---|---|---|---|
| 1 | 6 April 2026 | £50,000 | 2024/25 |
| 2 | 6 April 2027 | £30,000 | 2025/26 |
| 3 | 6 April 2028 | £20,000 | 2026/27 |
Qualifying income is your gross income (your turnover before expenses) from self-employment and property added together. So a landlord with £25,000 of rents and £27,000 of sole-trader turnover has £52,000 of qualifying income and is in from 6 April 2026, even though neither source on its own crosses £50,000.
Employment and pension income don't count towards the threshold, though you still report them at the final declaration. If you're a landlord working out which side of the line you sit on, the £30,000 threshold from 2027 and combined sole-trader and rental income are the two cases worth checking carefully. You can read more on what we do for property investors on our landlord accounting page.
The point for this article: if you're mandated, the late-payment penalty regime below is the one that applies to you. If you're below the threshold and still in regular Self Assessment, your late-payment rules are different.
How does the staged late payment penalty work? {#staged-penalty}
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Under MTD for Income Tax, late-payment penalties build up in two steps, then interest runs alongside. Here's the structure HMRC has announced for the 2026/27 tax year:
| How late the payment is | Penalty announced for 2026/27 |
|---|---|
| Up to 15 days late | No penalty |
| 16 to 30 days late | 3% of the tax owed at day 15 (or no penalty if it's your first year) |
| 31 days or more late | 3% of the tax owed at day 15, and 3% of the tax owed at day 30 |
So if you let a payment run past 30 days, you can face two 3% charges, calculated on the amounts still outstanding at day 15 and at day 30 respectively.
These percentages aren't fixed forever, and the figures above are the rates HMRC has announced rather than long-settled ones. HMRC's published plans show them stepping up for the 2027/28 tax year, where each of those charges is expected to rise to 4%. We're quoting the announced 2026/27 figures here because that's the first mandated year for landlords over £50,000. Always check the current rate against the gov.uk penalties page before you rely on a number, because the percentage depends on the tax year you're in and these new-regime rates are still subject to confirmation.
One thing worth stressing: these penalties are calculated on the tax that's still unpaid at each checkpoint, not on your whole bill regardless of part-payments. If you've cleared most of the balance by day 15, the day-15 penalty is based only on what's left.
What is the first-year grace period for 2026/27? {#first-year-grace}
HMRC has built in a softer landing for your first year in the new penalty system. In your first year of the new penalties, you get 30 days from the payment due date before a late-payment penalty applies, rather than the usual 15.
In plain terms: for 2026/27, if you pay within 30 days of the due date, there's no late-payment penalty at all. After that first year, the trigger point reverts to 15 days.
This easement is genuinely useful for landlords getting used to the new rhythm, but treat it as a one-off cushion, not a payment plan. Two points to keep in mind:
- The grace period covers the penalty, not the interest. Late-payment interest still runs from the first day your payment is late (more on that below).
- Once you're past your first year, the 15-day clock is unforgiving. Build your routine around paying on time now, while the stakes are lower.
How much late payment interest will I be charged? {#late-payment-interest}
This is where two different interest concepts can get muddled, so let's be precise.
From the first day your payment is late, HMRC charges late-payment interest on the outstanding amount. The general HMRC late-payment interest rate is set at the Bank of England base rate plus 4% (it was base rate plus 2.5% on or before 5 April 2025). As of 9 January 2026 that general rate is 7.75% a year. HMRC's interest rates move when the base rate moves, so check the live HMRC interest-rates page for the figure on the day you're calculating.
Separately, the MTD penalties guidance describes an announced late-payment-interest charge of 10% a year on the outstanding amount, charged daily from day 31 until the tax is paid, for up to two years, alongside the staged penalties above. As with the penalty percentages, treat that 10% as the announced rate for the new regime rather than a settled figure. Because the exact mechanics here are new and the gov.uk pages present interest and penalties in different places, we'd rather point you to the source than overstate a single number: see the gov.uk penalties page and the HMRC interest-rates page, both listed in Sources, for the figure that applies on your payment date.
The practical takeaway doesn't change with the precise percentage: interest compounds the cost of paying late every single day, and unlike the staged penalties it doesn't wait for day 15 or day 30 to start. Paying something is better than paying nothing, and paying on time is best of all.
Illustrative example: a landlord who pays two months late {#worked-example}
Illustrative example. Priya is a portfolio landlord mandated into MTD from 6 April 2026. After her final declaration for 2026/27, her balancing payment is £4,000, due 31 January 2028. She forgets, and pays in full on 1 April 2028, around 60 days late.
Assume, for this illustration, that the full £4,000 was still outstanding at both day 15 and day 30 (she made no part-payments), and that 2026/27 was not covered by the first-year easement for this charge.
Here's how the staged penalty would be calculated using the announced 2026/27 percentages:
| Charge | Basis | Calculation | Amount |
|---|---|---|---|
| First penalty | 3% of tax owed at day 15 | 3% × £4,000 | £120 |
| Second penalty | 3% of tax owed at day 30 | 3% × £4,000 | £120 |
| Penalty subtotal | £120 + £120 | £240 |
On top of that £240, late-payment interest runs daily on the £4,000 from the first day it was late until 1 April 2028. The penalties are a fixed cost; the interest is the meter that keeps ticking.
The lesson from the numbers is blunt: letting a £4,000 bill drift two months past the deadline turned into £240 of penalties plus interest, all of it avoidable. Figures are illustrative and rounded; your own charges depend on the amounts outstanding at each checkpoint and the interest rate on the day.
What about late submission penalties (the points system)? {#late-submission}
Late payment and late filing are two separate things under MTD, with two separate penalty systems. It's worth knowing both, because a landlord can be on time with one and late with the other.
For late submissions, including quarterly updates and your final declaration, MTD for Income Tax uses a points-based system from the tax year you join. You collect a penalty point each time you miss a submission deadline. Once you reach 4 points, you get a £200 penalty, and a further £200 penalty each time you miss another deadline after that.
So the quarterly rhythm matters. The standard quarterly update deadlines are:
| Quarter (cumulative, from 6 April) | Period covered | Filing deadline |
|---|---|---|
| Q1 | 6 April to 5 July | 7 August |
| Q2 | 6 April to 5 October | 7 November |
| Q3 | 6 April to 5 January | 7 February |
| Q4 | 6 April to 5 April | 7 May |
Each quarterly update is a cumulative, year-to-date summary, not four mini tax returns. That means a later update can correct an earlier one without you resending it. Miss enough of them, though, and the points add up. Our Self Assessment and MTD services keep the filing calendar on track for you.
When is the tax actually due, and what triggers a penalty? {#when-tax-due}
MTD changed your reporting, but it didn't move your payment date. The deadline to submit your final declaration and pay any tax you owe is 31 January after the end of the tax year. For 2026/27, that's 31 January 2028.
The final declaration is the step that replaces the old Self Assessment return: it's where you confirm your figures, claim your reliefs and allowances, and finalise the bill. If you're unsure how the final declaration differs from the Self Assessment return you're used to, our Self Assessment and MTD services can walk you through it.
A late-payment penalty is triggered when tax that's due on 31 January remains unpaid past the relevant grace point (15 days normally, 30 in your first penalty year). Payments on account, if you make them, still fall due on 31 January and 31 July as before. So the trigger isn't filing late, it's leaving the money unpaid.
How can landlords avoid MTD late payment penalties? {#how-to-avoid}
None of this is hard to avoid. It's mostly about not letting the bill drift.
- Know your number early. Because your quarterly updates are cumulative, you can see your likely profit building through the year. There's no excuse for January being a surprise.
- Set the money aside as you go. A simple rule of thumb is to park a percentage of each rent receipt in a separate account. Our self-employed tax calculator and income tax calculator can help you estimate the bill.
- Diarise 31 January, and pay early. The grace period is a safety net, not a plan. Aim to pay before the deadline, not 14 days after it.
- If you genuinely can't pay, talk to HMRC. A Time to Pay arrangement, agreed before things spiral, is far cheaper than ignoring the bill and racking up daily interest.
- Use the first year wisely. The 2026/27 easement gives you breathing room to get your systems right. Don't waste it forming a late-paying habit you'll regret from year two.
If MTD has made your tax life more complicated than it needs to be, that's exactly the kind of thing we sort out. Zmartly handles the digital records, the quarterly updates and the final declaration so the deadlines look after themselves.
Want to stop worrying about MTD deadlines and penalties? Book a free call with a Zmartly accountant and let us take the property tax admin off your plate. Learn more about our Self Assessment and MTD services.
Frequently asked questions {#faqs}
Does a landlord pay a penalty if the tax is only a few days late?
No. Under MTD for Income Tax there's no late-payment penalty for the first 15 days. In your first penalty year (2026/27 for those mandated from April 2026), that grace period is extended to 30 days. Late-payment interest, however, runs from the first day the payment is late, so paying a few days late still has a small cost.
How much is the MTD late payment penalty for 2026/27?
For 2026/27, HMRC has announced a first penalty of 3% of the tax still owed at day 15, and if you go past 30 days a second penalty of 3% of the tax still owed at day 30. These are the announced figures for the new regime and are expected to rise for later tax years, so always check the current figure on the gov.uk penalties page for the year you're in.
Is the MTD late payment penalty different from late filing penalties?
Yes. Late payment uses the staged percentage system described here. Late submission, missing a quarterly update or your final declaration, uses a separate points-based system: you get £200 once you reach 4 points, and £200 for each later miss. You can trigger one without the other.
When does a mandated landlord actually have to pay their tax under MTD?
The payment deadline hasn't changed. Any tax you owe is due by 31 January after the end of the tax year, alongside your final declaration. For the 2026/27 tax year, that's 31 January 2028. Payments on account, if applicable, remain due on 31 January and 31 July.
Can I avoid penalties if I genuinely can't afford to pay?
If you contact HMRC before the deadline and set up a Time to Pay arrangement, you can usually avoid late-payment penalties on the amounts covered by that plan, though interest may still apply. Ignoring the bill is the expensive option, because the staged penalties and daily interest both keep building.
Sources {#sources}
- HMRC, Penalties for Making Tax Digital for Income Tax: https://www.gov.uk/guidance/penalties-for-making-tax-digital-for-income-tax
- HMRC, Check if you're eligible for Making Tax Digital for Income Tax: https://www.gov.uk/guidance/check-if-youre-eligible-for-making-tax-digital-for-income-tax
- HMRC, Work out your qualifying income for Making Tax Digital for Income Tax: https://www.gov.uk/guidance/work-out-your-qualifying-income-for-making-tax-digital-for-income-tax
- HMRC, Send quarterly updates (Use Making Tax Digital for Income Tax): https://www.gov.uk/guidance/use-making-tax-digital-for-income-tax/send-quarterly-updates
- HMRC, Rates and allowances: HMRC interest rates for late and early payments: https://www.gov.uk/government/publications/rates-and-allowances-hmrc-interest-rates-for-late-and-early-payments
- HMRC, Self Assessment tax returns: deadlines: https://www.gov.uk/self-assessment-tax-returns/deadlines
