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Making Tax Digital Checklist 2026
MTD Quarterly Updates 2026
MTD Qualifying Income Explained 2026
Making Tax Digital Penalties 2026
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Making Tax Digital Deadlines & Key Dates 2026 (Complete UK Timeline)
Miss a Making Tax Digital deadline and HMRC will hit you with penalties starting at £200 — and that’s before the late payment charges, interest, and points-based fines kick in.
This guide gives you every MTD deadline you need to know for 2026, 2027, and 2028 — broken down by quarter, by tax type (ITSA, VAT, Corporation Tax), and by income threshold.
As ICAEW chartered accountants who file MTD returns every quarter for our clients, we’ll show you exactly when each submission is due, what happens if you miss it, and how to set up a system so you never miss one again.
Let’s start with the headline dates.
MTD Deadlines at a Glance (2026–2028)
Here are the key dates every UK taxpayer needs to know:
Date | What Happens | Who’s Affected |
|---|---|---|
April 2022 | MTD for VAT became mandatory | All VAT-registered businesses |
6 April 2026 | MTD for Income Tax (ITSA) starts | Income > £50,000 from self-employment or property |
7 August 2026 | First quarterly MTD ITSA submission deadline (Q1) | All MTD ITSA registered taxpayers |
7 November 2026 | Q2 quarterly submission deadline | Same as above |
7 February 2027 | Q3 quarterly submission deadline | Same as above |
April 2027 | MTD for Corporation Tax expected to begin | Limited companies (subject to HMRC confirmation) |
6 April 2027 | MTD ITSA threshold drops to £30,000 | New taxpayers in the £30k-£50k bracket |
7 May 2027 | Q4 submission deadline + Final Declaration | MTD ITSA registered |
31 January 2028 | Final Declaration for 2026-27 tax year | All MTD ITSA registered |
6 April 2028 | MTD ITSA threshold drops to £20,000 | New taxpayers in the £20k-£30k bracket |
Urgent: If your income is above £50,000 from self-employment or property, you must be MTD-ready by 6 April 2026. The lead time to set up software, learn the system, and file your first quarterly return is roughly 3-6 months. Start preparing now.
MTD ITSA Quarterly Submission Deadlines (2026–2027)
Under MTD for Income Tax Self-Assessment, you must submit 4 quarterly updates per tax year. The UK tax year runs from 6 April to 5 April.
Each quarterly update covers the income and expenses for that 3-month period and is due one month and one week after the quarter ends.
Quarter 1 (Q1): 6 April – 5 July
Period covered: 6 April to 5 July
Filing deadline: 7 August
What you submit: Total income, total expenses, and any adjustments for the 3-month period
Quarter 2 (Q2): 6 July – 5 October
Period covered: 6 July to 5 October
Filing deadline: 7 November
Cumulative submission: Q2 includes Q1 data + Q2 data (running total)
Quarter 3 (Q3): 6 October – 5 January
Period covered: 6 October to 5 January
Filing deadline: 7 February
Cumulative submission: Includes Q1 + Q2 + Q3 totals
Quarter 4 (Q4): 6 January – 5 April
Period covered: 6 January to 5 April
Filing deadline: 7 May
Cumulative submission: Includes the full tax year
Key point: Quarterly updates are cumulative — each one includes everything from the start of the tax year. You’re not just reporting that quarter’s numbers in isolation.
Final Declaration Deadline (Replaces Self-Assessment)
After Q4, you submit a Final Declaration — this replaces the old self-assessment tax return.
Tax Year | Final Declaration Deadline |
|---|---|
2026-27 (first MTD year for £50k+) | 31 January 2028 |
2027-28 (£30k+ threshold) | 31 January 2029 |
2028-29 (£20k+ threshold) | 31 January 2030 |
The Final Declaration is where you:
- Confirm the cumulative quarterly figures
- Add any non-business income (PAYE salary, dividends, interest, capital gains, pension)
- Claim allowable reliefs (pension contributions, marriage allowance, etc.)
- Pay any tax owed by the same 31 January deadline
This is where ICAEW chartered accountants like us add the most value — optimising reliefs, catching missed deductions, and minimising your final tax bill.
MTD for VAT Deadlines (Already Live Since 2022)
MTD for VAT has been mandatory since April 2022 for all VAT-registered businesses. The deadlines depend on your VAT period (monthly, quarterly, or annual).
Standard VAT Quarterly Submission Deadlines
Most UK businesses on quarterly VAT submit by:
VAT Period | VAT Return + Payment Deadline |
|---|---|
Jan – Mar (Q1) | 7 May |
Apr – Jun (Q2) | 7 August |
Jul – Sep (Q3) | 7 November |
Oct – Dec (Q4) | 7 February |
Your specific VAT periods are set by HMRC when you register. They don’t always match calendar quarters — check your HMRC account for your exact dates.
MTD for Corporation Tax Deadlines (April 2027)
MTD for Corporation Tax is expected to begin in April 2027 — though HMRC has yet to confirm the final start date. When it goes live, limited companies will need to:
- Keep digital records of all transactions
- Submit quarterly updates to HMRC
- File the annual CT600 return via MTD-compatible software
Companies House and HMRC deadlines for limited companies will remain the same, but the filing method will change from paper/CSV to fully digital.
If you run a limited company, start preparing now. Switching to MTD-ready software (Xero, QuickBooks, Sage) in 2025-26 will avoid a panicked transition in 2027.
What Happens If You Miss an MTD Deadline?
HMRC’s penalty system for MTD is harsher than the old self-assessment regime. Here’s exactly what happens when you miss a deadline:
1. Late Filing - Points-Based Penalty
Each missed quarterly submission adds a penalty point:
Submission Frequency | Points Threshold | Fine |
|---|---|---|
Quarterly (most MTD ITSA) | 4 points | £200 |
Annual | 2 points | £200 |
Monthly | 5 points | £200 |
Points expire after 2 years (from the month after issue) — but only if you submit all subsequent returns on time. Separate point counts apply for MTD ITSA, VAT, and Corporation Tax.
2. Late Payment — Tiered Penalty
If you pay late, the penalty escalates:
Days Late | Penalty | From April 2027 |
|---|---|---|
1-15 days | No penalty | No penalty |
16-30 days | 3% of tax owed (at day 15) | 4% of tax owed |
31+ days | Additional 3% of tax owed (at day 30) | Additional 4% |
31+ days (ongoing) | 10% per annum daily interest | 10% per annum daily interest |
A 30-day late payment on a £10,000 tax bill costs you £600 + interest. From April 2027, the same lateness costs £800. Pay on time.
3. Failure to Use Compatible Software
If you file using non-MTD-compatible software, HMRC can fine you £400 per return.
4. Failure to Keep Digital Records
Records must be kept in functional, MTD-compatible software — not paper, not disconnected spreadsheets. Penalties for failing this rule reach £3,000 per failure.
When Do I Need to Register for MTD?
ou must register for MTD before the start of the tax year MTD applies to you. For most people, the dates are:
Your Income Bracket | MTD Start Date | Register By |
|---|---|---|
Self-employed/landlord > £50,000 | 6 April 2026 | March 2026 (recommended: Q4 2025) |
Self-employed/landlord > £30,000 | 6 April 2027 | March 2027 (recommended: Q4 2026) |
Self-employed/landlord > £20,000 | 6 April 2028 | March 2028 (recommended: Q4 2027) |
VAT-registered business | Already mandatory | Already required |
Limited company (Corp Tax) | April 2027 (expected) | Q4 2026 (recommended) |
Read our step-by-step MTD registration guide for the exact HMRC process.
How to Never Miss an MTD Deadline Again: 5-Step System
Here’s the exact system we use with our clients to ensure they never miss an MTD deadline:
Step 1: Set Calendar Alerts 30 Days Before Each Deadline
Add every quarterly deadline to your Google/Outlook calendar with a 30-day advance reminder. This gives you time to gather receipts, reconcile transactions, and prepare for submission.
Step 2: Reconcile Your Books Monthly (Not Quarterly)
Don’t wait until the quarter ends. Reconcile your bank, expenses, and invoices every month. By deadline week, your figures are already prepared — submission becomes a 30-minute task instead of a 3-day panic.
Step 3: Use MTD-Compatible Software with Auto-Reminders
Xero, QuickBooks, and FreeAgent all have built-in reminder systems. See our software comparison guide to choose the right one.
Step 4: Build a ‘Deadline Buffer’ — Submit 7 Days Early
Treat the deadline as 7 days earlier than it really is. This gives you buffer for technical issues, HMRC system outages (which happen), and last-minute corrections.
Step 5: Outsource to a Specialist (If You Value Your Time)
Many of our clients tried DIY for one quarter, lost 10+ hours, and then hired us to handle quarterly submissions. The peace of mind is worth more than the fee.
MTD Deadline Edge Cases & Special Situations
What if my income drops below the threshold?
Once you’re in MTD ITSA, you stay in for 3 years — even if your income falls below the threshold in subsequent years. Plan accordingly.
What if I start self-employment mid-year?
Your first quarterly deadline is based on when you registered with HMRC for self-employment. If you register in October, your first MTD quarter starts then — and quarterly deadlines follow the standard schedule from that point.
What about partnerships?
Partnerships will be brought into MTD ITSA after April 2026 — exact date to be confirmed by HMRC. Each partner will likely have their own quarterly obligation.
What if I’m both employed AND self-employed?
Only your self-employment and property income counts for MTD ITSA thresholds. PAYE salary is excluded. But once in MTD, your Final Declaration must include all income sources.
What if HMRC’s system is down on deadline day?
HMRC has discretion to waive late filing penalties due to system outages — but you must prove you tried to file on time. Take screenshots of error messages with timestamps as evidence.
MTD Deadline FAQs
When is the first MTD deadline?
For MTD ITSA, the first quarterly deadline is 7 August 2026 (covering the period 6 April to 5 July 2026). For MTD VAT, deadlines have been in place since April 2022.
What is the MTD Final Declaration deadline?
31 January following the end of the tax year — the same date as the old self-assessment deadline. For the 2026-27 tax year, it’s 31 January 2028.
Can I file MTD late and avoid penalties?
Only if HMRC accepts a “reasonable excuse” (e.g., serious illness, bereavement, system outage). Forgetting or being too busy doesn’t qualify.
What is the MTD timetable for landlords?
Landlords follow the same MTD ITSA schedule as self-employed individuals: £50k threshold from April 2026, £30k from April 2027, £20k from April 2028.
When does MTD start for Corporation Tax?
April 2027 is the expected start, but HMRC has yet to confirm the final date. Limited companies should prepare to switch to MTD-ready software by Q4 2026.
Are MTD submission dates the same as self-assessment?
No. MTD has 4 quarterly deadlines (August, November, February, May) plus a 31 January Final Declaration. Old self-assessment was just one annual deadline (31 January).
What happens if I miss the first MTD deadline in August 2026?
You’ll get 1 penalty point. If you accumulate 4 points (i.e., miss 4 quarterly submissions), you get a £200 fine. Late payment of any tax owed will also trigger additional penalties.
When does HMRC announce MTD deadline changes?
HMRC typically announces changes in the Budget (March or November). Subscribe to gov.uk MTD updates and follow ICAEW for early warnings.
Can I change my MTD reporting frequency?
MTD ITSA is fixed at quarterly. For MTD VAT, frequency depends on your VAT scheme (monthly, quarterly, or annual). Speak to your accountant before changing.
Is the MTD deadline different in Scotland or Northern Ireland?
No — MTD applies UK-wide and uses the same submission deadlines across England, Wales, Scotland, and Northern Ireland.
Never Miss Another MTD Deadline — Outsource to ICAEW Chartered Specialists
Missing a single MTD deadline can cost you hundreds in penalties — and the stress of trying to fix it costs even more. Every quarter, our clients submit on time, every time, without lifting a finger.
At MTD – Making Tax Digital (part of B1 Accountants), our ICAEW chartered accountants handle:
- All your MTD quarterly submissions — on time, every quarter
- Final Declaration filing
- Tax optimisation to minimise what you owe
- Deadline reminders so nothing gets missed
- HMRC liaison if anything goes wrong
Book your free 30-minute MTD consultation — no obligation. We’ll review your situation, explain exactly what MTD means for you, and give you a clear plan.
BOOK YOUR FREE MTD CLARITY CALL →
Or call us directly: +44 (0) 75 079 66252
Bilal Chudher
(FCCA, FCA, TEP & MBA) Chartered Accountant
