Correct MTD Quarterly Update Landlord Guide 2026/27: How to Fix Mistakes

What counts as an MTD quarterly update mistake?

A mistake is any error or omission in the digital records or in the quarterly update totals sent to HMRC. For landlords, that usually means rent is missing, an expense has been posted to the wrong property category, a transaction has been duplicated, or a late invoice was not recorded in time.

MTD quarterly updates are summaries, not tax returns. HMRC receives totals for income and expense categories, not copies of your individual receipts, invoices or bank transactions.

For UK property, the quarterly update categories include total rent, other income from property, property repairs and maintenance, residential property finance costs, legal, management and other professional fees, travel expenses, and other allowable property expenses. Our MTD rental income and expense categories guide explains where common landlord costs usually sit.

• Missing rent: a tenant paid £1,250 in June but it was not matched in your software.
• Wrong category: letting agent fees were posted to repairs instead of legal, management and other professional fees.
• Late invoice: a plumber’s invoice for work done in the quarter arrived after you submitted the update.
• Duplicate transaction: a bank feed imported a rent receipt twice.
• Wrong property split: a shared cost was allocated to the wrong property or ownership share.

The 2026/27 correction rule in plain English

The legal rule is simple: once you discover an error or omission in a digital record, you must use functional compatible software to correct that record as soon as possible.

If the quarterly update already sent to HMRC was wrong, you must use the software to give HMRC the correct or complete information. For Q1, Q2 or Q3, this must be done no later than the next quarterly update deadline. For Q4, or the final period when an MTD obligation ends, it must be done no later than the tax return deadline for that MTD tax year.

In practice, many landlords will correct the transaction and let the next cumulative quarterly update pull through the corrected totals. Some software may also allow an earlier resubmission. The important point is that the software record must be corrected and the revised information must reach HMRC by the relevant deadline.

2026/27 quarterly update dates for landlords

For landlords using standard tax-year update periods in 2026/27, the quarterly updates are cumulative. That means each update covers the period from 6 April 2026 to the end of that update period, rather than only the latest three months.

The same filing deadlines apply if you choose calendar update periods, but the period end dates align to calendar quarters instead. You normally make the calendar quarters election before sending the first quarterly update for that tax year.

You can submit a quarterly update early only within the allowed early filing window and only if you reasonably believe the update contains the required information for the whole period. For most landlords, the safer workflow is to reconcile the bank feed and agent statement after the period ends, then submit.

How to fix common landlord errors

The right fix depends on the error. The principle is always the same: correct the source transaction, keep a clear audit trail, then let the software produce the corrected MTD totals.

For missing rent, add or match the rent receipt using the correct date, amount and property income category. If a letting agent deducted fees before paying you, record the gross rent and the fee separately so your income and expenses are not understated.

For a miscategorised expense, edit the transaction category rather than entering a second expense. For example, if a £240 letting agent fee was posted to repairs, move it to legal, management and other professional fees. That keeps the total expense the same but corrects the HMRC category.

For late invoices, use your accounting basis consistently. If your records are kept on a cash basis, the payment date usually matters. If your records are kept on an accruals basis, the invoice date or the period the cost relates to may matter. Do not guess if a large invoice straddles periods; keep the invoice and explanation.

Will HMRC penalise you for correcting a quarterly update?

A correction is not automatically a penalty event. HMRC’s 2026/27 penalty guidance says there are no penalties for missing a quarterly update deadline in the 2026 to 2027 tax year, although you still need to keep digital records and send quarterly updates before submitting your tax return.

For tax years after 2026/27, late quarterly updates fall under the points-based late submission system. The penalty point threshold for quarterly obligations is 4 points. If you reach the threshold, HMRC can charge a £200 penalty, with another £200 for each further missed deadline while at the threshold.

That is about late submission, not a normal correction made through software. A genuine bookkeeping correction, made promptly with evidence, is very different from failing to keep records or repeatedly missing deadlines.

• Keep the original invoice, receipt, agent statement or bank statement.
• Do not delete records in a way that destroys the audit trail.
• Add a note if the reason is not obvious, such as “agent statement received late”.
• Review categories before each quarterly submission, not after HMRC has queried them.
• If an error affects the final tax return already submitted, use the MTD software amendment route or speak to your adviser.

What to check before your final MTD tax return

Quarterly updates do not replace the final tax return. After the year ends, you still need to check the full-year property figures, make any required accounting or tax adjustments, add other income and reliefs, then submit the MTD tax return by 31 January 2028 for 2026/27.

This is where you should catch any remaining Q4 issues, year-end adjustments, private-use adjustments, capital items incorrectly treated as repairs, and residential finance cost entries that need to be shown separately.

If you have one property, the review may take minutes if your bank feed and receipt records are clean. If you have several properties, joint ownership, foreign property or an agent, build a review checklist so the correction process is repeatable every quarter.

• Reconcile every rental bank account and letting agent statement to 5 April 2027.
• Check that gross rent has not been reduced by agent fees.
• Review repairs versus improvements before claiming expenses.
• Check residential mortgage interest and finance costs are in the right place.
• Confirm unpaid rent, deposits and insurance claims have been treated correctly.
• Keep evidence for corrections, especially large or unusual items.

Step by step

1. 1

   Find the error

   Identify the exact transaction: date, amount, property, bank account or agent statement, and whether the issue is missing income, a wrong category, a duplicate or a late invoice.

2. 2

   Correct the digital record

   Use your MTD-compatible software to amend the source record. Do not just overwrite a quarterly total outside the software trail.

3. 3

   Attach or retain evidence

   Keep the invoice, receipt, tenancy ledger, bank statement or letting agent statement that explains the correction. Add a note if the reason is not obvious.

4. 4

   Review the corrected category totals

   Check that rent, repairs, finance costs, professional fees and other property expenses now appear in the right MTD categories.

5. 5

   Send the corrected information to HMRC

   If the software allows resubmission, you may be able to send the correction straight away. Otherwise, make sure the next cumulative quarterly update includes the corrected figures by the relevant deadline.

6. 6

   Recheck before the final tax return

   Before submitting the 2026/27 MTD tax return by 31 January 2028, reconcile the full year and fix any remaining Q4 or year-end issues.

A worked example

A landlord submitted the Q1 2026/27 update on time. In September 2026, she discovers that June rent was missing, a repairs invoice was received late, and an insurance cost was posted to the wrong category. She corrects the records before the Q2 deadline of 7 November 2026.

The missed rent increases the cumulative income total, the late repairs invoice increases cumulative expenses, and the insurance correction changes the category rather than the overall expense total.

Frequently asked questions