MTD Quarterly Reporting Deadlines: The Complete Guide for Sole Traders

If you're a sole trader trying to get your head around MTD quarterly reporting deadlines, you're not alone. Making Tax Digital for Income Tax (MTD for ITSA) is one of the biggest changes to UK self-assessment in decades, replacing the familiar annual tax return with a system of four quarterly updates each year, plus a final end-of-year declaration. Miss a deadline and you risk penalty points under HMRC's new Late Submission Penalty regime. Get it right, and you'll have a clearer, more accurate picture of your tax position throughout the year. This guide walks you through every deadline you need to know, explains what you actually have to submit, and shows you how to stay organised.

What Is MTD Quarterly Reporting?

Under the current self-assessment system, most sole traders submit one tax return per year, covering the previous tax year, with a deadline of 31 January. MTD for ITSA changes this fundamentally. Instead of one annual return, you'll send HMRC four quarterly updates throughout the year, giving them a running picture of your business income and expenditure. This is not about paying tax four times; it's about reporting your figures more regularly. Your actual tax bill is still calculated and paid in the usual way, but the reporting cadence shifts entirely.

Each quarterly update is a summary of your business income and expenses for that three-month period. You don't need to send invoices or receipts; just the totals in each category. The submissions must be made through HMRC-approved software, which means dedicated apps and accounting tools rather than a spreadsheet or HMRC's own portal.

For a broader overview of how MTD for ITSA works and when it begins, see our guide on Making Tax Digital deadline 2026: what sole traders must know.

The Four MTD Quarterly Reporting Deadlines

The tax year runs from 6 April to 5 April. HMRC has divided this into four quarters, and each quarter has its own submission deadline. The deadlines are set one month after the end of each quarter, giving you time to compile your figures.

Quarter 1: 6 April to 5 July

Deadline: 5 August

This first quarter covers the opening months of the new tax year, from the start of April through to early July. Your submission, covering income earned and expenses incurred between 6 April and 5 July, must reach HMRC by 5 August. This is often the quarter sole traders find easiest to manage because it follows the January self-assessment rush and many people have their records relatively up to date.

Quarter 2: 6 July to 5 October

Deadline: 5 November

The second quarter runs through the summer months. If you're in a trade that picks up during warmer weather, such as landscaping, building, or outdoor events work, this can be your busiest quarter. Your income and expenses summary for 6 July to 5 October must be submitted by 5 November.

Quarter 3: 6 October to 5 January

Deadline: 5 February

Quarter three spans the autumn and runs into the new year. The deadline of 5 February sits very close to the existing 31 January self-assessment deadline, which means January will become a particularly busy period during the transition years. Over time, as the old annual system phases out for MTD users, this overlap will matter less, but in the early years it's worth planning carefully to avoid a bottleneck.

Quarter 4: 6 January to 5 April

Deadline: 5 May

The final quarter closes on 5 April, the last day of the tax year, and you have until 5 May to submit your figures. After this, you still need to complete the end-of-year process.

The End-of-Year Finalisation Declaration

Quarterly updates are not the whole story. Once all four quarters have been submitted, you must complete an end-of-period statement (EOPS) for each source of income, followed by a final declaration. Think of the final declaration as the replacement for the current self-assessment tax return. It confirms that all your income information is correct and complete, including any sources not covered by your quarterly updates, such as dividends, savings interest, or employment income.

The deadline for the final declaration is 31 January, following the end of the tax year. This mirrors the existing self-assessment filing deadline, so that date remains a fixed point in your calendar.

So, to summarise the full annual cycle for a sole trader under MTD for ITSA:

1. 5 August: Q1 update (6 April to 5 July)
2. 5 November: Q2 update (6 July to 5 October)
3. 5 February: Q3 update (6 October to 5 January)
4. 5 May: Q4 update (6 January to 5 April)
5. 31 January (following year): End-of-year final declaration

For more detail on key dates across the MTD timeline, our article on MTD for Income Tax start date: key deadlines explained is a useful companion read.

Who Needs to Meet MTD Quarterly Reporting Deadlines?

Not every sole trader is affected at the same time. HMRC is introducing MTD for ITSA in stages, based on annual turnover from self-employment and property income combined.

• From April 2026: Sole traders and landlords with combined qualifying income over £50,000 must comply.
• From April 2027: The threshold drops to £30,000, bringing in a significantly larger group.
• From April 2028: The threshold is expected to fall to £20,000, subject to further government confirmation.

If your turnover is below the applicable threshold, you are not required to use MTD for ITSA yet and can continue with the existing self-assessment process. However, many accountants and software providers recommend getting set up early to avoid a last-minute scramble.

Partnerships are currently excluded from the MTD for ITSA rollout, though HMRC has indicated they will be brought into the system at a later date.

What Happens If You Miss a Quarterly Deadline?

HMRC is replacing the old fixed penalties for late self-assessment returns with a points-based system for MTD submissions. This is known as the Late Submission Penalty regime, and it works as follows.

Each time you miss a quarterly reporting deadline, you receive one penalty point. Once your points reach a certain threshold, you receive a £200 financial penalty. For quarterly submissions, the penalty threshold is four points. After a penalty is issued, your points reset, but only once you've submitted all outstanding returns and maintained a period of compliance.

This system is designed to be more forgiving of occasional lapses while still penalising persistent non-compliance. That said, four missed quarterly deadlines in a row is not a situation you want to find yourself in. A single missed submission, even if it doesn't immediately trigger a fine, stays on your record and affects your compliance standing with HMRC.

Separate penalties apply for late payment of tax, so missing a submission deadline and missing a payment deadline are two distinct issues.

Quarterly Periods: Can You Use Calendar Months Instead?

HMRC has recognised that many sole traders and their software providers prefer to work with calendar month-end dates rather than the unusual 5th-of-the-month quarters that align with the traditional tax year. As a result, HMRC does allow an alternative set of quarterly periods for MTD purposes:

• 1 April to 30 June (deadline: 31 July)
• 1 July to 30 September (deadline: 31 October)
• 1 October to 31 December (deadline: 31 January)
• 1 January to 31 March (deadline: 30 April)

This calendar-aligned option makes it easier for software to handle month-end cut-offs and can be simpler if your bookkeeping already follows calendar months. You should confirm with your software provider which period type they support and notify HMRC of your preferred approach when you sign up for MTD.

How to Stay on Top of MTD Quarterly Reporting Deadlines

The shift from one annual deadline to five annual submissions (four quarterly plus the final declaration) requires a change in habits. Here are the most effective ways to stay compliant.

Use HMRC-Approved MTD Software

This is non-negotiable. HMRC requires all MTD submissions to be made through software that connects directly to their systems via an Application Programming Interface (API). Spreadsheets, PDF submissions, and manual entry through the HMRC portal are not valid methods for MTD quarterly updates. Choose software that automates the process, categorises your income and expenses as you go, and sends reminders ahead of each deadline.

Adopt a Weekly or Monthly Bookkeeping Habit

The biggest mistake sole traders make is leaving their records until the deadline approaches. If you log your income and expenses weekly, your quarterly update becomes a five-minute job rather than a stressful afternoon of receipt-hunting. Bank feeds, which many MTD apps support, can pull transactions automatically, making it even easier to stay current.

Set Calendar Reminders

The five key dates, 5 August, 5 November, 5 February, 5 May, and 31 January, should be in your calendar right now. Set a reminder two weeks before each one so you have time to review your figures before submitting.

Understand That Corrections Are Possible

If you submit a quarterly update and later realise you made an error, you can resubmit a corrected update for the same period. MTD is designed to be iterative, so an honest mistake in a quarterly submission is not the end of the world, as long as the correct figures are in place before your final declaration.

For a full timeline of when MTD changes come into force, take a look at our post on when does Making Tax Digital start: key dates explained.

People also ask

What are the MTD quarterly reporting deadlines for sole traders?

What happens if I miss an MTD quarterly deadline?

Do I need to pay tax every quarter under MTD?

Can I use a spreadsheet for MTD quarterly submissions?

Preparing for Your First MTD Quarterly Submission

If April 2026 is your mandatory start date, your first quarterly deadline will be 5 August 2026. That gives you until early July 2026 to get your records in order, choose your software, and register with HMRC for MTD. Leaving this until the last moment is a common mistake. HMRC's registration process can take time, and your software will need to be authorised to connect to your HMRC account before you can submit anything.

Steps to take now, even if your mandatory date is still some time away:

1. Check whether your income will exceed the relevant threshold in the upcoming tax year.
2. Research HMRC-approved MTD software that suits your type of work and budget.
3. Start keeping digital records of your income and expenses, even if you're not yet required to submit quarterly.
4. Speak to an accountant or tax adviser if you have multiple income sources, as the interaction between different income streams under MTD can be complex.
5. Register for MTD with HMRC at least 90 days before your first required submission.

Conclusion

Understanding MTD quarterly reporting deadlines is essential for any sole trader approaching the Making Tax Digital era. The four quarterly submission dates, 5 August, 5 November, 5 February, and 5 May, plus the 31 January final declaration deadline, form the backbone of your new compliance calendar. Miss them and you accumulate penalty points; stay on top of them and you'll find the system is actually a manageable, even beneficial, way to keep track of your finances throughout the year. The key is to start preparing early, choose the right software, and build consistent bookkeeping habits well before your mandatory start date.