NOT financial advice - seek advice from a professional for your specific situation

    TaxKilnUK tax guidance
    TaxKilnUK tax guidance

    Making Tax Digital ITSA → Timeline + thresholds

    MTD ITSA Timeline + Thresholds — April 2026 (£50k) / April 2027 (£30k) / April 2028 (£20k consultation)

    MTD ITSA mandation is phased by COMBINED GROSS INCOME from self-employment + property: Phase 1 from 6 April 2026 catches taxpayers with combined gross income above £50,000 (~800,000 affected); Phase 2 from 6 April 2027 extends to £30,000+ (~1.7 million additional); Phase 3 from 6 April 2028 is intended to extend to £20,000+ but remains consultation-pending and is not legislated as a hard mandate. The threshold is GROSS income (turnover from self-employment + gross rents from property), NOT net profit — so Trading Allowance / Property Allowance / expenses are irrelevant for the threshold test. Joint property is split 50/50 by default (unless a Form 17 declaration of unequal beneficial interest is in place). FHL income post-abolition (from 6 April 2025) is treated as ordinary property income and counts towards the threshold. A newly self-employed taxpayer is caught from the April AFTER their first Self Assessment return identifies them as in-scope — there is NO annualisation rule for partial first years (this is a widespread misconception).

    Last reviewed:

    Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact HMRC. Read our editorial scope →

    In plain English

    Two simple tests determine when MTD ITSA applies to you: 1. WHAT TYPE OF INCOME do you have? Only self-employment income (sole trader trading profit reported via SA103) and property income (UK + foreign rental income reported via SA105 / SA106) count toward the MTD threshold. Employment income, dividends, pensions, savings interest, and capital gains do NOT count — but they continue to be reported via Final Declaration alongside MTD income. 2. WHAT IS YOUR COMBINED GROSS INCOME from those sources? Add together: total self-employment turnover (gross — before any expenses or Trading Allowance) + total gross rental income (gross — before any expenses or Property Allowance). If that combined gross figure exceeds the phase threshold for the relevant tax year, you are mandated to use MTD ITSA from the start of the next tax year (or the phase commencement date, whichever is later). For Phase 1 (6 April 2026): combined gross > £50,000 in the 2024/25 tax year (filed by 31 January 2026) triggers mandation from 6 April 2026. Widespread misconception: 'I started my business mid-year — surely they annualise the threshold?' No. HMRC's published rule is that newly self-employed individuals (or new landlords) are caught from the April AFTER their first SA return identifies them as in-scope. So if you start trading in November 2026 and file your first SA return for 2026/27 by 31 January 2028 showing gross income above the Phase 2 threshold (£30,000), you are MTD-mandated from 6 April 2028. The partial first-year is not annualised. Joint property: Default rule under ITA 2007 s.836 is 50/50 between spouses/civil partners regardless of legal title. A Form 17 declaration overrides this where beneficial interest is actually unequal AND legal title matches. So a couple jointly owning rentals generating £80,000 gross have £40,000 EACH — neither is Phase 1 caught but both are Phase 2 caught. FHL post-abolition (6 April 2025): historically Furnished Holiday Lettings had a separate ring-fenced regime. From 6 April 2025 that ring-fence is abolished; FHL income becomes ordinary property income and counts toward MTD thresholds on the same basis as long-term letting.

    How it works

    How HMRC identifies you for MTD

    HMRC uses the most recent filed SA return to identify in-scope taxpayers. For Phase 1 commencement on 6 April 2026, HMRC's reference point is the 2024/25 SA return (deadline 31 January 2026). Combined gross income (SA103 turnover + SA105/SA106 gross rents) above £50,000 triggers a Notice to File under MTD from April 2026. HMRC began issuing automated identification + transition notifications from October 2025.

    Combined gross income test — worked

    Anya has SA103 turnover £30,000 (net profit £18,000 after expenses) and SA105 gross rents £25,000 (net profit £8,000 after mortgage interest restriction etc.). Combined GROSS = £55,000 — above £50,000 — Anya is Phase 1 caught from 6 April 2026 even though combined NET profit is only £26,000. The threshold test uses GROSS figures — expenses, Trading Allowance, Property Allowance, mortgage interest restriction, and capital allowances are all irrelevant.

    Joint property + Form 17

    ITA 2007 s.836 default: spouses + civil partners jointly owning property are taxed 50/50 regardless of actual beneficial interest. To override, BOTH: (a) the actual beneficial interest must be unequal, AND (b) the unequal split must match legal title. A valid Form 17 declaration locks the split until circumstances change. For unmarried co-owners, the actual beneficial interest applies from day one. MTD threshold test uses each individual's share — joint £80k gross in marriage = £40k each.

    FHL post-abolition (6 April 2025)

    From 6 April 2025 the Furnished Holiday Lettings regime is abolished (FA 2025). Former FHL income becomes ordinary property income — taxed in the property business pool with other rental income. Mortgage interest deduction follows the s.272A restriction (basic-rate credit only). Capital allowances cease (replaced by Replacement of Domestic Items). For MTD threshold, FHL income counts as ordinary property income — aggregated with long-term lettings.

    Newly self-employed / new landlord — no annualisation

    Common misconception: 'My business started mid-year — surely the threshold is annualised?' No. HMRC's published rule: a new business is caught from the April AFTER the first SA return that identifies them as in-scope. If trade commences October 2026, first SA return covers 2026/27 (filed by 31 January 2028). If that return shows combined gross above the prevailing threshold, MTD mandation runs from 6 April 2028. Until then the taxpayer files traditional SA.

    Interaction with HICBC + High Income Child Benefit

    MTD ITSA only changes HOW income is reported, not the underlying tax. HICBC (High Income Child Benefit Charge) continues to apply per ITEPA s.681B etc. — but is reported via Final Declaration, not via quarterly updates. Taxpayers whose income is below MTD thresholds but who have HICBC obligations remain in traditional SA.

    Who this applies to + key conditions

    Statute + manual references

    Primary: Finance (No.2) Act 2017 ss.60-62 (MTD framework); Finance (No.2) Act 2023 (mandation timing); SI 2021/1076 — Income Tax (Digital Requirements) Regulations 2021; SI 2024/167 — phase 1 commencement.

    Related: Income Tax (Earnings and Pensions) Act 2003 / ITTOIA 2005 — underlying income tax framework; ITA 2007 s.836 — jointly held property default 50/50 between spouses; FA 2025 — FHL regime abolition with effect 6 April 2025; Finance Bill 2025-26 — EOPS removal legislative effect; Trading Allowance — ITTOIA 2005 ss.783A-783AR (gross test means allowance does not reduce MTD threshold income); Property Allowance — ITTOIA 2005 ss.783B-783BR (same — gross test)

    HMRC manual: Making Tax Digital for Income Tax — HMRC collection at gov.uk/government/collections/making-tax-digital-for-income-tax

    Common mistakes + traps

    Worked example

    James + Priya, jointly own 3 BTL properties in Manchester (£80,000 combined gross rents) + Priya also has £20,000 sole-trade graphic design income

    James is a higher-rate PAYE employee with no other self-employment. Priya has £20,000 sole-trade graphic design turnover. The couple jointly own 3 BTLs generating £80,000 gross rents (no Form 17 in place). They want to know whether each is MTD-mandated from April 2026, April 2027, or later.

    1. Step 1 — Joint property attribution. ITA 2007 s.836: default 50/50 between spouses without Form 17. James = £40,000 gross rent share; Priya = £40,000 gross rent share.
    2. Step 2 — Combine income types per individual. James: £0 SE + £40,000 property = £40,000 combined. Priya: £20,000 SE + £40,000 property = £60,000 combined.
    3. Step 3 — Apply Phase 1 threshold (£50,000 from 6 April 2026). James £40,000 — NOT caught Phase 1. Priya £60,000 — CAUGHT Phase 1 from 6 April 2026.
    4. Step 4 — Apply Phase 2 threshold (£30,000 from 6 April 2027). James £40,000 — caught Phase 2 from 6 April 2027.
    5. Step 5 — Software + transition planning. Priya: final traditional SA for 2025/26 filed by 31 Jan 2027; first MTD Q1 quarterly update due 7 August 2026 covering 6 April-5 July 2026. James: final traditional SA for 2026/27 filed by 31 Jan 2028; first MTD Q1 quarterly update due 7 August 2027 covering 6 April-5 July 2027.
    6. Step 6 — Consider Form 17 election. If actual beneficial interest is unequal AND matches legal title (e.g. 70/30 in James's favour), a Form 17 could attribute £56,000 to James (caught Phase 1) and £24,000 to Priya (NOT caught Phase 2 if her SE alone <£30,000). Whether this helps depends on overall tax planning — Form 17 is a long-term decision not a year-by-year toggle.
    7. Step 7 — Anti-charlatan note. A 'MTD specialist £2,500 retainer for the couple' is unwarranted for this fact pattern. Standard cloud software (£10-30/month per business) + their existing accountant for Final Declaration handles this comfortably. Save the retainer fee.

    Outcome: Priya MTD-mandated from 6 April 2026 (Phase 1). James MTD-mandated from 6 April 2027 (Phase 2). Standard SaaS + existing accountant — no specialist retainer warranted.

    How this connects to the rest of the framework

    Software requirements →

    Once mandated by threshold test, the next decision is choice of HMRC-recognised functional compatible software.

    Quarterly updates Q1-Q4 →

    Mandation triggers obligation to submit 4 quarterly updates per tax year on Q1-Q4 deadlines.

    Transition mechanics →

    Identification by HMRC triggers the transition pathway — final traditional SA for 2025/26 followed by first MTD quarter for 2026/27.

    Exemptions →

    Even if above the threshold, digital-exclusion + other carve-outs may exempt you.

    /self-assessment →

    MTD ITSA replaces SA filing mechanics for in-scope income; SA continues for non-MTD income (employment / dividends / etc.) via Final Declaration.

    /reliefs/hicbc →

    HICBC + other charges report via Final Declaration; underlying liability unchanged by MTD.

    Frequently asked questions

    What happens if I miss the Self Assessment deadline?+
    The Self Assessment deadline is 31 January (online filing) for the previous tax year. Miss it and HMRC apply an automatic £100 penalty. Beyond that: £10 per day from 3 months late (capped at £900), 5% of tax due at 6 months late, and another 5% at 12 months late, under Schedule 55 of the Taxes Management Act 1970. If you have a genuine reason (serious illness, bereavement, technical issue with HMRC's systems) you can appeal with evidence; HMRC accepts reasonable excuse appeals in most genuine cases.
    Do I need an accountant or can I file Self Assessment myself?+
    Legally you can file Self Assessment yourself via gov.uk for free, most simple sole-trader returns (single income source, basic expenses) are realistic to self-file. An accountant adds real value when: your trading profit is above £40,000 (extraction-strategy decisions matter), you have multiple income streams (PAYE + self-employment + property + dividends), you've crossed the £90,000 VAT threshold, you're considering incorporation, or you have an HMRC enquiry. Expect to pay £400-£1,500/year for a typical sole-trader accountant; the cost is itself a deductible expense.
    How do payments on account work?+
    When your Self Assessment tax bill exceeds £1,000 for the first time, HMRC requires payments on account toward NEXT year's tax. Half the current bill is due 31 January (alongside the current bill); the other half is due 31 July. So your first January after crossing the threshold can hit with a double-bill: last year's balance + first payment on account. Adjust via Form SA303 if you expect next year's income to drop substantially. Payments on account don't apply if more than 80% of your tax is collected via PAYE.
    Does the Trading Allowance reduce my MTD threshold income?+
    No. The threshold test uses GROSS income (turnover + gross rents) before any allowances or expenses. £52,000 gross turnover with £1,000 Trading Allowance unused is still £52,000 for MTD threshold — Phase 1 caught.
    I'm employed PAYE + have £15,000 side-hustle SE. Am I MTD-mandated?+
    Not at Phase 1 (£50k) or Phase 2 (£30k). You would only be caught at Phase 3 (£20k) if it is legislated — currently consultation-pending. Your employment income is reported via Final Declaration regardless.
    Does dividend income from my Ltd Co count toward MTD threshold?+
    No. MTD ITSA threshold uses combined SELF-EMPLOYMENT + PROPERTY income only. Dividends from your own company (or any other source) report via Final Declaration under unchanged SA mechanics.
    If I drop below the threshold one year, do I leave MTD?+
    There is a 'continuation' mechanism — once in, you remain in for a period even if you drop below. HMRC's published rule is broadly that you stay in MTD unless you cease to have qualifying income for 3 consecutive years OR formally apply to leave. Check the HMRC published guidance at commencement.

    Free + regulated-body resources

    Last reviewed: