The Rehearsal Quarter: Testing Making Tax Digital Before April 2027

As of November 2026, Making Tax Digital for Income Tax is no longer a distant administrative idea. It is live for larger sole traders and landlords, and from April 2027 it extends to those with qualifying income above £30,000. For many smaller UK businesses, the first quarterly update will also be the first real test of whether their records can support it. That is an uncomfortable order of events. A rehearsal quarter, run while nothing is at stake, is a more sensible way to begin.

A rehearsal is not a software purchase

Most conversations about Making Tax Digital start with software. Software matters, but it is not the whole requirement. The harder question is operational: who gathers the records, who reconciles them, who reviews the exceptions and who signs off the update? A firm can buy a compliant tool and still fail the rhythm if one person holds all the knowledge and the bank account tells a different story from the ledgers.

The purpose of a rehearsal is therefore not to file a return early. It is to test whether the business can produce a coherent quarter on demand. That means a complete sales record, a complete expense record, a reconciliation to the bank and a short list of items that need judgement. If any of those four elements depends on memory or a last-minute search through email, the process is not ready.

What a quarter-end update actually asks for

The quarterly update is a structured summary of income and expenses, not a full set of statutory accounts. That distinction is often used to reassure owner-managers, and it is technically fair. It is less reassuring in practice. A summary is only as good as the records beneath it, and the deadline does not move because the paperwork is incomplete.

For a smaller business, the update typically demands four things. First, sales income must be recorded as it arises, including receipts that arrive through payment platforms or in cash. Second, expenses must be captured with enough description to support the category they are placed in. Third, the records must reconcile to the bank and to any merchant accounts. Fourth, someone must look at the exceptions: the duplicated receipt, the personal card used for a business purchase, the customer deposit that is not yet income, the supplier invoice that has been accrued but not paid.

The owner-manager does not need to perform every step. They do need to know that someone can. A useful test is to ask whether a deputy could assemble the quarter pack without asking the owner where anything is. If the answer is no, the business has a single point of failure, and April 2027 will expose it.

Where the reconciliation work hides

The reconciliation is usually where the quarterly rhythm breaks. Bank feeds are rarely perfect. A cash sale is not in the feed. A business expense was paid on a personal card and never reimbursed through the accounts. A supplier invoice arrived in the post and sits in a pile. A customer paid a deposit that was recorded as income too early. None of these are unusual; they are the normal texture of a smaller business.

The problem is that they accumulate quietly. At quarter-end, they become a list of unexplained differences that someone has to resolve under time pressure. A rehearsal should aim to surface that list while it is still small. Pick a quarter that has already passed, reconstruct the pack and time how long it takes. The exercise is not about perfection. It is about discovering which records are missing, which descriptions are too vague and which transactions need a second pair of eyes.

The ninety-minute monthly habit

The most effective defence against a quarter-end scramble is a monthly routine that takes about ninety minutes. It does not need to be elaborate, and it does not need to produce a management accounts pack. It needs to close the gap between the bank and the records often enough that the gap never becomes a project.

A workable agenda has five parts. Reconcile the bank to date. Confirm that sales invoices have been raised for completed work. Check that purchase receipts have been captured into the software. List the coding questions that need an answer. Review a one-page view of cash in, cash out and the obvious variances. The owner-manager should attend the review, not the data entry. The point is to make decisions while the context is fresh.

This habit also creates evidence. If HMRC or an accountant asks why a transaction was treated in a particular way, the answer is more likely to be in the file. More importantly, the business learns how long the work actually takes. A quarterly deadline is easier to meet when the monthly rhythm has already proved that the records can be closed within a few working days.

Test the rhythm on a quiet quarter

The months before April 2027 are a useful window. Choose a quiet quarter, ideally one that has already ended, and run the process as if the deadline were real. Produce the summary, reconcile the bank, resolve the exceptions and ask the accountant to review the pack. Do not file anything unless the business is already required to do so. The objective is measurement: hours spent, gaps found and decisions deferred.

A good outcome is a quarter pack that is ready within five working days of the quarter end, reviewed by the owner in under half an hour and supported by a named deputy. A less comfortable outcome is still useful. It shows where the business needs to change its record-keeping before the threshold applies, rather than after the first deadline has passed.

The £30,000 threshold is often described as a tax change. For a smaller UK firm, it is also an operating discipline. The businesses that adapt smoothly will be those that rehearse the rhythm while mistakes are cheap and deadlines are self-imposed.