MTD and VAT: How Income Tax and VAT Requirements Interact

Already VAT Registered? How MTD for Income Tax Adds to Your Obligations

Last updated: February 2026

If you already file VAT returns through Making Tax Digital, you might assume that MTD for Income Tax will be folded into the same process. It will not. MTD for VAT and MTD for Income Tax Self Assessment (MTD ITSA) are entirely separate systems with separate registrations, separate filing obligations, and separate deadlines. Being compliant with one does not make you compliant with the other.

From 6 April 2026, sole traders and landlords with qualifying income above £50,000 must begin quarterly reporting under MTD ITSA. Many of these individuals are already VAT-registered and have been filing digital VAT returns since 2019. This article explains exactly how the two systems interact, where they overlap, and what you need to do to comply with both.

MTD for VAT and MTD for Income Tax are separate registrations

This is the single most important point. MTD for VAT has been mandatory for all VAT-registered businesses since April 2022. If you are VAT-registered, you are already signed up for MTD for VAT and submit your VAT returns digitally through MTD-compatible software.

MTD for Income Tax is a different programme entirely. It requires a separate sign-up through HMRC, uses a different section of your HMRC account, and has its own quarterly submission requirements. Being enrolled in MTD for VAT does not automatically enrol you in MTD ITSA. You must register separately, and your software must be authorised separately for each.

The two systems also report different information. MTD for VAT submissions contain your output tax, input tax, and net VAT position. MTD ITSA submissions contain your income and expenses for each business or property source. They serve different purposes and feed into different parts of HMRC’s systems.

Who needs to comply with both

You will need to comply with both MTD for VAT and MTD ITSA if you meet all of the following conditions:

• You are registered for VAT (the current threshold is £90,000, though many businesses register voluntarily below this)
• You are a sole trader or landlord (not a limited company or partnership)
• Your qualifying income exceeds the relevant MTD ITSA threshold

Qualifying income for MTD ITSA purposes means total gross income from self-employment and UK property combined, before any expenses are deducted. This is not your profit figure. A sole trader turning over £55,000 with £20,000 in expenses has qualifying income of £55,000 and falls into Phase 1 from April 2026.

Limited companies are outside MTD ITSA entirely. If you trade through a limited company, MTD for VAT applies to your company, but MTD ITSA does not apply to you personally (unless you also have self-employment or property income in your own name). Corporation Tax MTD has no mandatory start date set.

The quarterly deadlines compared

Both MTD for VAT and MTD ITSA require quarterly submissions, but the quarters themselves may be different.

MTD for VAT quarters

VAT quarters are determined by your VAT registration and typically follow one of three patterns:

• January, April, July, October
• February, May, August, November
• March, June, September, December

Your VAT return is due one month and seven days after the end of each quarter.

MTD ITSA quarters

MTD ITSA uses fixed tax year quarters that are the same for everyone:

• Q1: 6 April to 5 July — submit by 7 August
• Q2: 6 July to 5 October — submit by 7 November
• Q3: 6 October to 5 January — submit by 7 February
• Q4: 6 January to 5 April — submit by 7 May

In addition, MTD ITSA requires a Final Declaration by 31 January following the end of the tax year.

The mismatch problem

Unless your VAT quarters happen to align with the tax year, you will have two sets of quarterly deadlines running on different cycles. A VAT-registered sole trader with March quarter-ends, for example, would submit VAT returns for periods ending March, June, September, and December, while simultaneously submitting MTD ITSA updates for periods ending July, October, January, and April. That is eight quarterly submissions per year across two systems.

Aligning your VAT and income tax quarters

HMRC allows you to request a change to your VAT quarter dates. If you align your VAT quarters with the tax year (so they end in June, September, December, and March), the periods become very close to the MTD ITSA quarters. While they will never be identical (MTD ITSA runs on a 6th-to-5th basis, while VAT uses calendar months), aligning them as closely as possible reduces the number of distinct reporting periods you need to manage.

To change your VAT quarter dates, you submit a request through your VAT online account. There is no charge, but HMRC may issue a shorter transitional return to bridge the gap between your old and new quarter-end dates.

Whether aligning makes sense depends on your circumstances. If your VAT quarters already run March/June/September/December, you are already close to aligned. If they run January/April/July/October, the mismatch with MTD ITSA is more pronounced, and realignment may save significant administrative effort.

Worked example: Sarah, a VAT-registered sole trader

Sarah runs a consultancy business as a sole trader. Her gross annual turnover is £72,000. She has been VAT-registered since 2021 and files VAT returns quarterly through MTD for VAT, with quarters ending in March, June, September, and December. Her VAT returns are submitted through Xero.

Before April 2026

Sarah submits four VAT returns per year through Xero. She also files an annual Self Assessment tax return by 31 January. Total filings per year: five (four VAT plus one Self Assessment).

From April 2026

Sarah’s qualifying income of £72,000 places her in Phase 1 of MTD ITSA. She must now also submit quarterly income and expense updates through MTD-compatible software, plus a Final Declaration. Her annual filings increase to:

• Four VAT returns (March, June, September, December quarter-ends)
• Four MTD ITSA quarterly updates (July, October, January, April quarter-ends)
• One Final Declaration by 31 January

That is nine submissions per year, spread across two different quarterly cycles. Sarah’s VAT quarters are already close to aligned with the tax year, so the mismatch is manageable but still requires attention.

Sarah’s practical workflow

Because Sarah already uses Xero for her VAT returns, she can use the same platform for MTD ITSA. Xero supports both MTD for VAT and MTD ITSA submissions from a single account. Her workflow becomes:

1. Daily/weekly: Record income and expenses in Xero as she already does
2. End of each VAT quarter: Review and submit her VAT return through Xero
3. End of each MTD ITSA quarter: Review the income and expense summary for the period and submit the quarterly update through Xero
4. By 31 January: Submit her Final Declaration, which replaces the old Self Assessment tax return

The extra quarterly submissions do not require Sarah to enter data twice. Her bookkeeping feeds both the VAT returns and the MTD ITSA updates. The additional work is in reviewing and approving each submission, not in duplicating record-keeping.

Software that handles both MTD streams

If you are already using MTD-compatible software for VAT, check whether the same product also supports MTD ITSA. Many of the major platforms do, including Xero, QuickBooks, FreeAgent, and Sage. Using a single platform for both avoids maintaining separate systems and reduces the risk of data inconsistencies.

If your current VAT software does not support MTD ITSA, you have two options: switch to a platform that handles both, or run a second piece of software alongside your existing one. The first option is usually simpler. Our software comparison guide covers which platforms support both MTD for VAT and MTD ITSA.

Whichever software you use, you will need to authorise it separately for MTD ITSA through your HMRC account. The authorisation for MTD for VAT does not carry over.

VAT flat rate scheme and MTD ITSA

If you use the VAT flat rate scheme, your MTD for VAT submissions are straightforward because you apply a fixed percentage to your gross turnover rather than tracking input and output VAT separately. MTD ITSA, however, still requires you to record and categorise your actual income and expenses. The flat rate scheme simplifies your VAT, not your income tax reporting.

This means that even if your VAT bookkeeping is minimal under the flat rate scheme, you will need full income and expense records for MTD ITSA. If you have been relying on simplified VAT records, you may need to upgrade your bookkeeping processes before April 2026.

Key differences between the two systems

Understanding where MTD for VAT and MTD ITSA differ helps you plan your compliance workflow:

• Registration: Separate sign-up required for each
• Software authorisation: Each must be authorised independently with HMRC
• Quarter dates: VAT follows your VAT registration cycle; ITSA follows fixed tax year quarters
• What you report: VAT returns report output and input tax; ITSA updates report income and expenses
• Annual filing: VAT has no annual return beyond the four quarterly ones; ITSA requires a Final Declaration by 31 January
• Penalties: Each system has its own penalty regime, and points are tracked separately

What to do now if you are already MTD for VAT compliant

If you are already filing VAT through MTD and your qualifying income exceeds £50,000, take these steps before April 2026:

1. Check your software: Confirm that your current MTD for VAT software also supports MTD ITSA. If it does not, plan your migration now.
2. Register for MTD ITSA: Sign up through your HMRC online account. This is a separate registration from your existing MTD for VAT enrolment.
3. Authorise your software: Once registered, authorise your chosen software for MTD ITSA submissions.
4. Consider quarter alignment: Review whether changing your VAT quarter-end dates would reduce the complexity of managing two quarterly cycles.
5. Review your bookkeeping: Ensure your records are detailed enough for MTD ITSA. VAT records alone may not capture the level of income and expense categorisation that ITSA requires.

The good news is that you are not starting from scratch. You already have MTD-compatible software, digital records, and experience with quarterly submissions. MTD ITSA adds to your workload, but it builds on a foundation you already have in place.

Sources

• GOV.UK: Use Making Tax Digital for Income Tax
• GOV.UK: Sign up for Making Tax Digital for VAT
• GOV.UK: Change your VAT registration details
• GOV.UK: Making Tax Digital for Income Tax Self Assessment penalties

Frequently asked questions

Does being registered for MTD for VAT automatically sign me up for MTD for Income Tax?

No. MTD for VAT and MTD for Income Tax are separate systems with separate registrations. You must sign up for MTD ITSA independently through your HMRC account, even if you already file VAT returns through MTD.

Can I use the same software for both MTD for VAT and MTD ITSA?

Yes, if your software supports both. Platforms such as Xero, QuickBooks, and FreeAgent handle MTD for VAT and MTD ITSA from a single account. You will need to authorise the software separately for each, but your underlying bookkeeping data feeds both.

Should I align my VAT quarters with the tax year?

It depends on your business. Aligning your VAT quarter-end dates as closely as possible to the tax year quarters reduces the number of distinct reporting periods and simplifies your compliance workflow. You can request a change through your VAT online account at no charge.

Do penalty points from MTD for VAT carry over to MTD ITSA?

No. Penalty points are tracked separately for each obligation. Points accumulated for late VAT returns do not count towards the MTD ITSA threshold, and vice versa. Each system maintains its own independent penalty record.

Will my quarterly workload double under both MTD systems?

Not necessarily. If you use software that handles both MTD streams, your day-to-day bookkeeping stays the same. The additional work is in reviewing and submitting the MTD ITSA quarterly updates, which draw on the same records you already maintain for VAT. The number of submissions increases, but the data entry does not double.