MTD for Income Tax has quadrupled your client contact. It has not quadrupled your team.

The compliance content of a quarterly update is not difficult. Any competent bookkeeper can prepare one. What has changed is not the difficulty of the work but its frequency — and frequency, not complexity, is what breaks a practice's resourcing model.

The arithmetic nobody enjoys doing

Take an affected client under the old model. Once a year, you chased records, brought the bookkeeping up to date, prepared the return, raised queries, got approval and filed. Call it one full cycle of contact, chasing, processing and communication.

Under Making Tax Digital for Income Tax, that same client now generates four quarterly updates plus an end-of-period statement and a final declaration. The annual return did not go away — it was joined by the quarterly obligations. Each quarterly cycle carries its own records chase, its own catch-up bookkeeping, its own reconciliation, its own submission and its own client communication.

The processing time per cycle is lower than a full annual job. The number of touchpoints is roughly four times higher. And touchpoints, not processing minutes, are what consume a practice's capacity, because each one requires a human to initiate contact, wait, follow up, and escalate.

The work that has multiplied is the chasing, not the accounting. That distinction matters, because chasing is the easiest part of the cycle to move and the hardest part to automate away.

The scope keeps widening

April 2026 brought in taxpayers with qualifying income above £50,000 — around 780,000 of them, on HMRC's published figures. From April 2027 the threshold falls to £30,000. From April 2028 it falls to £20,000.

Each step down brings in a larger population than the one before, because taxpayer numbers rise as you descend the income scale. The clients arriving in 2027 and 2028 will also, on average, have worse records and less software familiarity than the 2026 cohort, because the earlier cohort skewed towards more established businesses already working with an accountant.

So the volume increases, and the per-client effort increases with it. A resourcing plan built around the 2026 cohort will not survive 2027 unchanged.

Why hiring is the expensive answer

The instinctive response is to recruit. Three things are working against that.

• The pipeline has narrowed. UK practices have reported severe difficulty resourcing new client work, with a large majority saying talent shortages have constrained their capacity to take on engagements. You are competing for a smaller pool against firms with deeper pockets.
• Employment costs rose. Employer National Insurance moved to 15% with the secondary threshold cut to £5,000. Every hire costs more than the equivalent hire did two years ago, before you reach pension, software, holiday cover and recruitment fees.
• The demand is uneven. Quarterly deadlines cluster. Hiring for the peak leaves you over-staffed between peaks; hiring for the average leaves you in crisis four times a year rather than once.

What actually works

Practices handling this well are doing three things, and none of them is heroic.

1. Separating the chase from the accounting

Records chasing does not require a qualified accountant. It requires persistence, a defined escalation ladder and someone whose week is not already full. Separating that function from the technical work — whether internally or externally — typically recovers more capacity than any other single change, because it removes the highest-volume, lowest-skill activity from your most expensive people.

2. Segmenting clients by readiness rather than by fee

The clients who will consume disproportionate effort are not the largest ones. They are the ones with paper records, no software, and a habit of arriving in the last week. Identifying them in advance and either onboarding them onto software, repricing them, or declining them is a decision best taken before the quarter starts rather than during it.

3. Making capacity variable rather than fixed

The structural mismatch is that MTD demand is periodic while employment cost is continuous. Any solution that converts some portion of capacity from a fixed monthly salary into a variable cost that scales with cycles addresses the mismatch directly. That may be outsourcing; it may equally be a well-run bank of contract staff. What does not work is absorbing four times the cycles into a team sized for one.

The honest caveat

Outsourcing does not fix a practice whose real problem is pricing. If your MTD clients are on fees set when the obligation was annual, you have a pricing problem wearing a capacity problem's clothes, and moving the work elsewhere will simply relocate a loss.

Reprice first. Then resource. In that order, because doing it the other way round means discovering the pricing problem after you have committed to a cost.