Blog Making Tax Digital

What Exactly Goes Into an MTD Quarterly Update?

July 16, 2026 3 min read

Quick answer: An MTD quarterly update is a cumulative summary of your business or property income and expenses for the period, broken down by category and drawn from your digital records ,it is not a full tax calculation, and reliefs and adjustments are added later at the final declaration.

A lot of the anxiety around MTD comes from not knowing what’s actually required. The good news: it’s lighter than you think.

Is a quarterly update a tax return?

No. A quarterly update is a summary of income and expenses for the period, categorised ,not a calculation of your final tax. You’re not claiming reliefs or making adjustments at this stage; that happens at the final declaration by 31 January.

What categories do you report?

For self-employment, you report totals against standard income and expense categories. For property, you report rental income and allowable property expenses. The key is that these totals come straight from your digital records ,see digital record keeping for HMRC.

How accurate does a quarterly update need to be?

Quarterly updates can be based on the data as it stands at the time, and you can correct and refine throughout the year, with final adjustments made at the final declaration. That’s why clean ongoing categorisation matters more than last-minute precision ,if your books are tidy as you go, each update is just a confirmation.

Do separate income sources need separate updates?

Yes. If you have both self-employment and property income, each is reported separately. Landlords with multiple properties should read MTD for landlords with multiple properties.

How do you actually file a quarterly update?

The mechanics are simple with the right software ,we walk through the whole thing in quarterly updates HMRC walkthrough. Miss a deadline and the points-based penalty system applies, which continuous bookkeeping helps you avoid.

How does CleanBooks AI build your update for you?

Because Keeva categorises every transaction as it arrives, your quarterly totals are always ready. CleanBooks AI assembles the summary from your digital records and submits it to HMRC ,you just confirm. Your live tax estimate updates the moment a quarter is confirmed, so you see the impact immediately rather than waiting for January.

Make quarterly filing a non-event. File with CleanBooks AI.

Frequently asked questions

What information goes in an MTD quarterly update?
A quarterly update contains cumulative totals of your income and allowable expenses for the period, broken down by HMRC’s standard categories. It’s a summary from your digital records, not a full tax calculation.
Do I calculate my tax in a quarterly update?
No. Quarterly updates only report income and expense totals. Your tax is finalised at the year-end final declaration, where reliefs, adjustments and other income are added. Software may show an estimate, but the formal calculation comes later.
Can I correct a quarterly update later?
Yes. Quarterly updates can be refined as your records are corrected through the year, and any final adjustments are made at the final declaration. They’re not locked-in tax returns.
Do I file separate quarterly updates for different income types?
Yes. Self-employment income and property income are reported separately, each with its own categories. If you have both, you submit updates for each within the same quarterly cycle.

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