UK Landlord MTD Quarterly Tax Calculator
Making Tax Digital for Income Tax is now live for UK landlords earning over £50,000 combined from property and self-employment. This calculator organises your rental income and expenses into HMRC’s exact quarterly-update categories, correctly separates mortgage interest under Section 24, estimates the tax impact, and lets you print a clean PDF summary to use with your own MTD software or give to your accountant.
1. This period’s figures
Matches HMRC’s MTD quarterly update categories for UK property income.
Standard quarters all start 6 April — figures are cumulative from the start of the tax year, not just the latest three months. Enter your cumulative-to-date totals for the quarter selected.
Total rent received for this reporting period, before any expenses.
Council tax paid on behalf of tenants, landlord insurance, ground rent and service charges.
Property repairs, maintenance and replacing domestic items — not improvements.
Letting agent fees, accountant fees, legal costs of renewing a lease under 50 years.
Advertising for tenants, direct costs of letting (phone calls, stationery), and similar.
Kept separate from other expenses — under Section 24, this no longer reduces your profit directly.
2. Estimated annual tax impact
Illustrative only — uses full-year figures, not just the period above, since your property income is taxed alongside all your other income for the year.
Full tax year's rent received, across all properties.
Full year's rates, repairs, management fees and other allowable expenses — excluding finance costs.
Full year's mortgage or loan interest — the amount the 20% Section 24 tax reducer applies to.
Everything else you earn — property profit stacks on top of this for tax band purposes.
How to use this calculator
- Pick the quarter you’re reporting in Section 1 — remember MTD figures are cumulative from 6 April, not just the latest three months, so enter your running total for the year so far.
- Fill in rental income and each expense category separately. Keep mortgage or loan interest in its own “finance costs” field — mixing it in with other expenses is the single most common MTD mistake landlords make.
- In Section 2, enter your full-year figures (not just this quarter) plus any other income, so the tax estimate reflects your real overall tax position — property profit is taxed on top of everything else you earn.
- Click “Print / Save as PDF” for a clean summary with just the figures — ready to enter into your MTD software or send to your accountant.
Understanding your results
Section 1’s totals are exactly what HMRC’s quarterly update asks for: income, allowable expenses (excluding finance costs), and finance costs reported separately. There is no tax calculation at this stage — MTD quarterly updates are simply cumulative running totals; the actual tax computation happens once a year at your Final Declaration. Section 2 goes further: it estimates what this property is really costing or saving you in tax, by comparing your total estimated tax with the property included against your tax on other income alone. The Section 24 tax reducer shown is correctly capped at the lowest of your finance costs, your property profit, and your income above the personal allowance — not simply 20% of everything, which is a common oversimplification that overstates the relief for some landlords.
The rules behind this calculator
Tax reducer = 20% × min(finance costs, property profit, income above allowance)Property profit before finance costs is rental income minus every allowable expense except mortgage interest. That profit is added to your other income and taxed using the 2026/27 bands: 0% up to your personal allowance (£12,570, tapering to £0 between £100,000 and £125,140 of total income), 20% on the next £37,700, 40% on the next £74,870, and 45% above that. Because these band widths sit on top of your personal allowance rather than at fixed absolute income levels, the £100,000–£125,140 band carries a well-documented effective marginal rate of around 60% — losing personal allowance as you earn more, on top of the 40% higher rate, adds up fast. Instead of deducting mortgage interest from profit, you get a 20% tax reducer on the lowest of the three figures above — a deliberate cap that stops the relief exceeding what a full deduction would have been worth.
A worked example
A landlord earns £18,000 in annual rent, with £4,500 of allowable expenses (repairs, insurance, management fees) and £4,800 of mortgage interest, alongside a £35,000 salary. Property profit before finance costs is £13,500 (£18,000 − £4,500). Total income for tax purposes is £48,500 (£35,000 + £13,500) — comfortably within the basic-rate band, so the personal allowance isn’t tapered. The Section 24 tax reducer is 20% of the lowest of £4,800 (finance costs), £13,500 (property profit) and £35,930 (income above the £12,570 allowance) — so 20% × £4,800 = £960 comes off the tax bill. Comparing total tax with and without the property shows this rental adds roughly £1,740 to the landlord’s annual tax bill after the reducer — useful context before assuming the whole £13,500 profit is what actually costs you in tax.
MTD for landlords — the key facts
Making Tax Digital for Income Tax became mandatory on 6 April 2026 for landlords and sole traders with combined gross income over £50,000 — the threshold drops to £30,000 from April 2027 and £20,000 from April 2028, pulling in far more landlords over time. Instead of one annual Self Assessment return, you keep digital records and submit four cumulative quarterly updates through HMRC-recognised or bridging software, followed by a Final Declaration after the tax year ends that replaces the old tax return and is still due by 31 January. HMRC has said it won’t apply penalty points for late quarterly updates in your first 12 months on MTD, but a points-based penalty regime starts from the 2027-28 tax year. This calculator is not itself MTD-recognised software — it prepares your figures for whichever compliant software or agent you use.
Frequently asked questions
Do I have to use Making Tax Digital for Income Tax?+
It's mandatory from 6 April 2026 if your combined gross income from property and self-employment is over £50,000. The threshold drops to £30,000 from April 2027 and £20,000 from April 2028, so most landlords will eventually be brought in even if they aren't yet.
Does this tool submit my quarterly update to HMRC?+
No. There is no free way to submit directly to HMRC without HMRC-recognised software (or a spreadsheet plus 'bridging' software) that connects to HMRC's systems via an authorised API — that's a formal software-recognition process, not something a general website can do. This tool organises and calculates your figures so you can enter them into that software yourself, or hand them to your accountant.
Why is my mortgage interest shown separately from other expenses?+
Since April 2020 (Section 24 of the Finance Act), landlords can no longer deduct mortgage interest as a normal expense. Instead, you get a tax reducer worth 20% of your finance costs, applied to your final tax bill — reporting it separately is required for MTD and gives a more accurate picture of your real tax position.
What are the MTD quarterly deadlines?+
Standard quarters all start 6 April and are cumulative from the start of the tax year: Q1 (to 5 July) is due 7 August, Q2 (to 5 October) due 7 November, Q3 (to 5 January) due 7 February, and Q4 (to 5 April) due 7 May. HMRC won't apply penalty points for late quarterly updates in your first 12 months on MTD.
Is the estimated tax figure accurate enough to rely on?+
Treat it as a planning estimate, not a final figure. It uses the current 2026/27 England/Wales/Northern Ireland income tax bands and the correct Section 24 cap logic, but doesn't account for Scottish rates, other reliefs, National Insurance, or income types outside salary/self-employment/property. Your actual liability is finalised at your annual Final Declaration.
What happens if I miss a quarterly update deadline?+
HMRC has said it will not apply penalty points for late quarterly updates in your first 12 months on MTD. From the 2027-28 tax year, a points-based penalty regime applies — check HMRC's current guidance for the exact rules in force when you file.