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    TaxKilnUK tax guidance
    TaxKilnUK tax guidance

    Making Tax Digital ITSA → Penalty regime

    MTD ITSA Penalty Regime — Schedule 24/25/26 FA 2021 + Points-Based + 3%/3%/10% Transitional

    MTD ITSA introduces a new POINTS-BASED late submission penalty + a graduated LATE PAYMENT penalty regime under Schedule 24, 25 + 26 of Finance Act 2021 (mirroring MTD VAT which has used the same framework since January 2023). LATE SUBMISSION: each late quarterly return earns 1 point; reaching 4 points (the quarterly threshold) triggers a £200 fixed penalty for THAT submission AND for each subsequent late submission. Points expire after 24 months of full compliance (5 in-time submissions for quarterly cycle). LATE PAYMENT under Schedule 26: first 15 days — interest only; 3% at day 15 + further 3% at day 30 + 10% annualised daily from day 31 (TRANSITIONAL 2026/27 rates); RISING to 4% at day 15 + further 4% at day 30 + 10% annualised daily from day 31 (STEADY-STATE from 2027/28). HMRC LATE-PAYMENT INTEREST: Bank of England base rate + 4% from 6 April 2025 (increased from base + 2.5% — corrected from earlier widespread misstatement). REPAYMENT INTEREST: base rate minus 1% (floor 0.5%). HMRC has published a 2026/27 transition concession on quarterly points — verify exact terms at commencement.

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    In plain English

    Two separate penalty tracks under MTD ITSA — late submission penalties + late payment penalties + interest. Each operates independently. LATE SUBMISSION (Schedule 24 FA 2021 — points-based): Each time you miss a quarterly update deadline (7 Aug / 7 Nov / 7 Feb / 7 May) OR Final Declaration deadline (31 Jan), you get 1 POINT. For quarterly submissions, the threshold is 4 POINTS. When you hit 4 points, the NEXT (and every subsequent) late submission triggers a £200 FIXED PENALTY. Points last 24 months from when they were awarded — but they only EXPIRE once you have a clean 'good compliance period' of 5 in-time submissions for the quarterly cycle (or 2 for annual cycle). The genius/cruelty of this system: a one-off late submission does NOT trigger a penalty — just a point. But a serial late-filer who racks up 4 points then keeps missing deadlines pays £200 per filing thereafter until they re-set the counter with 5 in-time submissions. Worked: Sam misses Q1 (point 1), Q2 (point 2), Q3 (point 3), Q4 (point 4 — threshold + £200 penalty for Q4). Next year he misses Q1 again (£200 penalty). Then he files Q2, Q3, Q4 + Final Declaration all on time = 4 in-time submissions; still 1 short of the 5-submission good compliance period for quarterly cycle, so points + threshold persist. Misses next year's Q1 → another £200. And so on until he builds the clean 5-submission stretch. LATE PAYMENT (Schedule 26 FA 2021): Two penalty layers + interest. First 15 days late: no fixed penalty (just interest accruing daily). Day 15: 3% of unpaid tax (transitional 2026/27) / 4% steady-state from 2027/28. Day 30: a FURTHER 3% (transitional) or 4% (steady-state). Day 31+: 10% annualised daily until paid. HMRC LATE-PAYMENT INTEREST: Bank of England base rate + 4% from 6 April 2025. (Corrected from earlier widespread misstatement of base + 2.5%.) On a base rate of 4.75% this means interest at 8.75% annualised on unpaid tax — adds materially to total cost. REPAYMENT INTEREST (when HMRC owes you): base rate minus 1%, floor 0.5%. Asymmetric — HMRC charges more than it pays. TRANSITIONAL CONCESSION: HMRC has published a 2026/27 transition concession on quarterly POINTS (recognising the disruption of first-year mandation). Exact terms vary by HMRC announcement — verify at commencement. Concession does NOT extend to late-payment penalties or interest. APPEALS: standard reasonable excuse + statutory review + FTT route (see Tribunals + HMRC Enquiries cluster). Reasonable excuse is defined judicially — illness, bereavement, software unavailability are typical grounds; ignorance of MTD obligations is NOT.

    How it works

    Late submission points — Schedule 24 FA 2021

    Each missed deadline = 1 point. Quarterly cycle threshold = 4 points; once reached every subsequent late submission triggers £200 fixed penalty. Points expire only after a 'good compliance period' of 5 in-time submissions for quarterly cycle (or 2 for annual cycle). Until expired, the £200 penalty continues for each new late filing. Points + penalty tracked per regime — quarterly + Final Declaration counted separately.

    Late payment penalty — Schedule 26 FA 2021

    Days 1-14: no fixed penalty (interest only). Day 15: 3% of unpaid tax (transitional 2026/27) / 4% steady-state from 2027/28. Day 30: further 3% (transitional) or 4% (steady-state) — cumulatively 6%/8% by day 30. Day 31+: 10% annualised daily on unpaid amount until paid. Penalty layers are CUMULATIVE — paying on day 16 saves the day-30 charge but not day-15.

    Interest mechanics

    HMRC late-payment interest: Bank of England base rate + 4% from 6 April 2025 (corrected from earlier widespread misstatement of base + 2.5%). On a 4.75% base = 8.75% annualised. Calculated daily from due date until paid. Applies to all unpaid tax — quarterly + balancing + POA — independent of late-payment penalties. HMRC repayment interest (to taxpayer): base minus 1%, floor 0.5% — asymmetric.

    Transition concession 2026/27

    HMRC has published a transition concession on QUARTERLY POINTS for the first MTD ITSA year (recognising disruption of first-year mandation + soft-landing precedent from MTD VAT). Exact terms vary by HMRC announcement — typically a grace period before points start accruing, or relaxed application of the threshold. Does NOT extend to late-payment penalties or interest. Verify exact terms at commencement.

    Reasonable excuse appeals

    Standard reasonable excuse framework continues — Perrin v HMRC [2018] UKUT 156 test: would a reasonable person in the taxpayer's circumstances have failed despite taking reasonable care? Typical accepted grounds: serious illness/bereavement, software unavailability outside taxpayer's control, postal delay (for paper appeals), HMRC service failure. NOT accepted: ignorance of MTD obligations, deliberate non-engagement, agent failure unless taxpayer can show genuine reliance + agent vetting.

    Statutory review + Tribunal route

    Penalty notice → request internal statutory review within 30 days → if upheld, appeal to First-tier Tribunal Tax Chamber within 30 days. See Tribunals + HMRC Enquiries cluster for full procedure. Late-payment penalties may be partially or wholly cancelled on reasonable excuse grounds; quarterly submission points cancelled on same basis. Standard tribunal-grade reasonable excuse argument applies.

    Who this applies to + key conditions

    Statute + manual references

    Primary: Finance Act 2021 — Schedules 24, 25, 26: points-based late submission penalty regime + graduated late payment penalty regime.

    Related: Schedule 24 FA 2021 — points-based late submission (replaces TMA 1970 s.93 / Schedule 55 FA 2009 for MTD); Schedule 25 FA 2021 — late submission penalty supplementary; Schedule 26 FA 2021 — late payment penalty 3%/3%/10% transitional + 4%/4%/10% steady-state; FA 2024 — late-payment interest rate increase to base + 4% from 6 April 2025; TMA 1970 s.59A + s.59B — payment-on-account framework continues unchanged; Tribunals, Courts and Enforcement Act 2007 — FTT appeal jurisdiction

    HMRC manual: Penalties Manual at gov.uk/hmrc-internal-manuals/compliance-handbook (CH140000 series for new regime); HMRC published MTD-specific penalty guidance from commencement

    Case law: Perrin v HMRC [2018] UKUT 156 (TCC) — reasonable excuse test (objective with subjective element); Christine Perrin — what constitutes reasonable excuse for late submission

    Common mistakes + traps

    Worked example

    Tariq, Phase 1-mandated sole-trader IT consultant who misses Q1 + Q2 of his first MTD year (2026/27) due to overwhelm

    Tariq is mandated from 6 April 2026. He misses Q1 (7 August 2026) by 3 weeks, and misses Q2 (7 November 2026) by 5 weeks. He files Q3 + Q4 on time + Final Declaration on time. He also pays his 2026/27 balancing payment + first POA 6 weeks late (paid 14 March 2028 instead of due 31 January 2028). Unpaid tax = £6,400. He wants to understand his total penalty exposure + interest.

    1. Step 1 — Late submission points. Q1 late = 1 point. Q2 late = 2 points. Q3 on time, Q4 on time = no new points. Final Declaration on time = no point. Tariq holds 2 points (below 4-point threshold) → no £200 fixed penalty in 2026/27. Points last 24 months but only expire after 5 in-time submissions (good compliance period). Tariq has 3 in-time submissions Q3 + Q4 + Final Declaration; still 2 short of expiry.
    2. Step 2 — Transition concession 2026/27. HMRC published concession on quarterly points first year — verify exact terms at commencement; may have removed Tariq's Q1 + Q2 points entirely, or applied modified threshold. Assume base case (concession only partially mitigates).
    3. Step 3 — Late payment penalty. Balancing + first POA £6,400 unpaid from due date 31 January 2028. Paid 14 March 2028 = 42 days late. Day 15 penalty (transitional 2026/27 rate 3%): £6,400 × 3% = £192. Day 30 penalty (further 3%): £6,400 × 3% = £192. Day 31-42 (12 days at 10% annualised): £6,400 × 10% × (12/365) = ~£21. Total late-payment penalties: £192 + £192 + £21 = ~£405.
    4. Step 4 — Late-payment interest. HMRC interest rate base + 4% = ~8.75% on £6,400 for 42 days = £6,400 × 8.75% × (42/365) = ~£65.
    5. Step 5 — Total cost of being late: £0 quarterly submission penalty (2 points only) + £405 late-payment penalty + £65 late-payment interest = ~£470. Significantly more than just paying on time.
    6. Step 6 — Mitigation. Tariq could: (a) appeal the late-payment penalties on reasonable excuse if grounds exist (overwhelm alone unlikely sufficient — Perrin); (b) request Time-to-Pay arrangement BEFORE 31 January 2028 deadline → removes late-payment penalties (interest continues); (c) factor into cash-flow planning a buffer before deadlines.
    7. Step 7 — Anti-charlatan note. A 'MTD penalty defence specialist £800 retainer' is unwarranted for £470 exposure. Reasonable excuse appeal is a free letter to HMRC requesting statutory review under standard template — see Tribunals + HMRC Enquiries cluster. If FTT appeal becomes appropriate, qualified tax barrister via direct access at appropriate rates — not a £800 specialist fee.

    Outcome: Total exposure ~£470 for missed deadlines + late payment. No quarterly £200 fixed penalty triggered (below 4-point threshold). Time-to-Pay request + reasonable excuse appeal are free routes — no £800 specialist retainer warranted.

    How this connects to the rest of the framework

    Quarterly updates Q1-Q4 →

    Quarterly update late submission triggers 1 point per miss; 4 points threshold = £200 per subsequent late filing.

    EOPS + Final Declaration →

    Final Declaration late submission also points-counted; late payment penalty applies to balancing payment + POA.

    Transition mechanics →

    2026/27 transition concession on quarterly points — verify HMRC published terms at commencement.

    /tribunals-and-hmrc-enquiries/penalty-regime →

    Statutory review then FTT appeal route — see Tribunals cluster for full procedure.

    /tribunals-and-hmrc-enquiries/statutory-review-and-ftt-procedure →

    30-day request statutory review + 30-day FTT appeal window — standard mechanics.

    /self-assessment →

    Payment-on-account regime continues unchanged — 31 January balancing + first POA, 31 July second POA.

    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.
    Can I appeal the £200 fixed penalty for late submission?+
    Yes — standard reasonable excuse + statutory review + FTT route. Perrin test applies. Free at all stages — no specialist counsel needed for the first two stages.
    What if my software fails on the deadline?+
    Software unavailability outside taxpayer's control can be a reasonable excuse — but document carefully (vendor confirmation, screenshots, attempted alternative submission methods). HMRC reluctant to accept blanket software failure without specifics.
    Does paying tax stop the penalty clock?+
    Yes — the day-15 + day-30 penalty layers + the day-31+ daily 10% charge all stop accruing on the day tax is paid. Interest continues until paid in full.
    Can a Time-to-Pay arrangement remove the late-payment penalty?+
    Yes — Time-to-Pay agreed BEFORE the original due date (31 January) removes late-payment penalties for the agreed period. Interest continues to accrue. Set up via Personal Tax Account if liability under £30,000 + meets criteria.

    Free + regulated-body resources

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