What Counts as Records for MTD? HMRC's Actual Requirements

What Counts as Records for MTD? HMRC's Actual Requirements

Most people filing MTD quarterly updates know they need to keep receipts. But HMRC's actual record-keeping requirements go further than that - and the gap between what people assume is fine and what HMRC actually expects can cause real problems if you face a compliance check. This post explains exactly what counts as a record for MTD purposes: the formats HMRC accepts, what "digital" actually means in practice, how long you need to keep everything, and what "contemporaneous" means when an inspector uses that word at you. If you're filing yourself with no accountant, this is the detail that protects you.

Why MTD Record Requirements Are Different From Old Self Assessment

Under the old annual tax return system, most people kept a folder of receipts and a rough spreadsheet, and that was broadly enough. MTD changes the expectation in one important way: your records now need to support quarterly figures, not just an annual total. That means HMRC can ask you to justify what you reported for April to June separately from July to September - and your records need to be organised enough to do that.

The underlying legal basis hasn't fundamentally changed - HMRC still relies on the same record-keeping obligations in the Taxes Management Act and related regulations - but the practical demand on your records is higher because you're filing more often and your figures are more granular.

For a plain-English overview of what MTD actually requires at a high level, see What Does MTD Actually Require? A Plain-English Guide.

The Core Principle: What Is a "Record" Under MTD?

HMRC defines records as the underlying evidence that supports the figures you report. That covers three broad categories:

• Income records - evidence of money received or earned
• Expense records - evidence of money spent in the course of your business or letting activity
• Supporting documents - anything that helps explain or justify those figures

A "record" is not just the receipt or invoice itself. It is the combination of: what the transaction was, when it happened, how much it was, and why it was a business or property expense. If you can answer all four of those questions with evidence, you have a record. If you can only answer one or two, you may have a problem.

What Formats Does HMRC Accept?

MTD requires you to keep digital records. That phrase causes a lot of confusion. Here is what it actually means.

Digital records mean transaction-level data in a digital form

Under the MTD for Income Tax rules, you must record each transaction digitally - not just your totals. So rather than writing "office expenses: £400 for Q1" in a notebook, you need a digital record of each individual purchase that makes up that figure. That could be a spreadsheet row per transaction, an entry in MTD software, or a structured CSV file.

HMRC is explicit that you cannot simply enter quarterly totals into software at the end of each quarter. The individual transaction data must exist somewhere in a digital format.

For guidance on whether spreadsheets satisfy this requirement, see Can You Use Spreadsheets for MTD? What HMRC Accepts.

Bank exports and statements

A CSV or PDF export from your bank counts as a digital record of a transaction. It shows the date, amount, and payee. It does not on its own explain what the expense was for - so a bank export is necessary but not always sufficient. You need to be able to match each line to a category and, for larger or less obvious items, to a receipt or invoice.

Bank exports are particularly useful as a backbone. You can reconcile your reported figures against your bank statement to show that nothing has been invented and nothing has been missed. For a practical guide to doing this before you file, see Reconcile Your Bank Account to MTD: Before You File.

Receipts and invoices - digital copies are fine

You do not need to keep paper originals. A photograph of a receipt, a PDF invoice saved to a folder, or a scan stored in cloud storage all count as valid records. The copy must be legible and show the key details: supplier, date, amount, and ideally a description of what was purchased.

A blurry photo that you cannot read is not a record. Neither is a photo of a receipt that is so faded the figures have disappeared. If you are photographing receipts, check that the image is clear before you discard the paper.

Screenshots

Screenshots can support a record but are rarely sufficient on their own. A screenshot of an online payment confirmation, for example, can support a bank export entry and a saved invoice. On its own, without the invoice or a description, it does not tell HMRC enough.

Mileage logs

If you claim mileage as a business expense using HMRC's approved simplified rates (45p per mile for the first 10,000 miles, 25p after), you need a mileage log. That log must record the date, start point, destination, purpose of the journey, and miles driven. A spreadsheet works. An app that records journeys works. A rough estimate scribbled at the end of the quarter does not.

For more on claiming mileage in MTD, see Mileage Allowances for MTD: Claiming Simplified Rates in Q1.

What "Contemporaneous" Means - and Why It Matters

HMRC uses the word "contemporaneous" to describe records that were made at the time of the transaction - or very close to it. A receipt issued at point of sale is contemporaneous. A mileage log updated weekly is broadly contemporaneous. A spreadsheet reconstructed from memory in July covering what you spent in April is not.

Why does this matter? Because if HMRC opens a compliance check into one of your quarterly updates, they can ask how and when the records were created. Records that look like they were put together after the fact - or that cannot be dated - are treated with more scepticism than records with clear timestamps, email received dates, or invoice dates.

Practically speaking, you do not need to record every transaction the same day. But weekly is far better than quarterly, and quarterly is far better than annual reconstruction. The daily and weekly habits that protect you here are covered in Starting Q2: 5 Daily Habits to Keep Your MTD Records Clean.

What "Accessible" Means in Practice

Your records must be accessible - meaning you can retrieve and produce them within a reasonable time if HMRC asks. That has two practical implications.

First, do not store everything in a single folder with no organisation. If a compliance officer asks for all your receipts for Q2 (July to September), you need to be able to find them. Organising records by quarter and by category as you go - rather than in one pile at the end of the year - makes this possible. See After Filing Q1: How to Organize and Store Your MTD Records for Q2 for a practical system.

Second, do not rely on storage you might lose access to. Records stored only in an app you later cancel, or in a cloud account you close, create a problem. Keep local copies of important documents or use storage that is genuinely long-term.

Income Records: What You Actually Need

For sole traders, income records typically include:

• Invoices issued to clients (or customers)
• Bank statements or exports showing payments received
• Records of cash received (if applicable), dated and described
• Payment platform exports (for example, from a payment processor or marketplace)

For landlords, income records typically include:

• Tenancy agreements showing the rent amount and terms
• Bank statements showing rent received
• Letting agent statements if an agent collects rent on your behalf
• Records of any other amounts received (for example, for services included in the rent)

The key point is that you need to be able to show what income you received, when, and from whom - for each quarter separately. If your rent arrives on the 1st of each month, your Q1 record should show six months of receipts (April, May, June payments), not just a total.

Expense Records: Beyond the Receipt

A receipt proves that money was spent. It does not on its own prove that the expense was for business purposes. HMRC can - and in compliance checks sometimes does - ask you to explain why a particular item was a business expense, not just what it cost.

For straightforward expenses (a specific tool for your trade, a renewal of professional membership, a train ticket to a client meeting), the receipt plus a note of the purpose is usually enough. For less obvious expenses - home office costs, subscriptions with mixed personal and business use, or meals - you may need a short written explanation of the business purpose.

This is especially important for mixed-use expenses, where you claim only a proportion. In that case, your record should show the total cost, the basis on which you calculated the business percentage, and the amount claimed. For guidance on that calculation, see Mixed-Use Expenses and MTD: Claiming the Business Percentage.

What counts as an allowable expense is a separate question - the focus here is on the format of the evidence, not on eligibility. For the question of what you can claim, see Self-Employed Business Expenses in MTD: What You Can Actually Claim or Landlord Expenses in MTD: Which Ones Count (And Why).

Transaction-Level Evidence: What That Phrase Means

"Transaction-level" simply means one record per transaction, not a summary. If you bought five items of stationery in Q1, your records should show five separate entries - or one receipt listing all five - not a single line saying "stationery: £47."

In practice, most people achieve this naturally if they keep receipts and log expenses as they go. The risk is when people summarise too early - for example, entering a monthly total from a bank statement without keeping the underlying transaction detail.

If you import expenses from a CSV bank export, each row in that CSV is transaction-level data. That is one reason why bank exports are a good starting point for MTD record-keeping.

How Long Do You Need to Keep Records?

For MTD for Income Tax, you must keep your records for at least five years after the 31 January filing deadline for the relevant tax year. So for the 2026-27 tax year (which ends 5 April 2027, with a final declaration due by 31 January 2028), you would need to keep records until at least 31 January 2033.

HMRC can open a compliance check within that window. If records have been destroyed, HMRC is entitled to make its own estimates of your income or expenses - and those estimates may not be in your favour.

For a full breakdown of retention periods and what happens if HMRC suspects fraud (which extends the window further), see How Long to Keep MTD Records After Filing: HMRC Retention Rules.

What Happens If Your Records Are Incomplete?

If HMRC opens a compliance check and your records do not support the figures in your quarterly updates, you have several possible outcomes, none of them straightforward. HMRC may accept a reasonable explanation and move on. They may ask for additional evidence. Or they may issue an assessment for additional tax based on their own estimate, plus interest and potentially penalties.

The best protection is records that are complete, contemporaneous, and organised. That does not require expensive software. It requires a consistent habit of recording transactions as they happen and keeping the underlying evidence somewhere you can find it.

For what to expect if HMRC does open a check, see HMRC Compliance Enquiry After Q1 Filing: What to Expect.

A Quick Summary of What You Need to Keep

• Digital transaction-level records for all income and expenses (not just quarterly totals)
• Receipts or invoices for expenses - digital copies are fine, must be legible
• Bank exports or statements to support and reconcile your figures
• Mileage log if you claim mileage - date, destination, purpose, miles
• Tenancy agreements and letting agent statements (landlords)
• Invoices issued to clients and evidence of payment (sole traders)
• Notes explaining the business purpose for any non-obvious expenses
• All of the above organised by quarter and retained for at least five years after the relevant filing deadline

You do not need a professional accounting system to meet these requirements. A well-organised spreadsheet, a folder of receipts by quarter, and a disciplined habit of recording transactions as they happen will satisfy HMRC's actual requirements for most sole traders and landlords. The goal is to be able to answer four questions for every transaction: what was it, when did it happen, how much was it, and why was it a business expense.