VAT for agencies: where the money quietly leaks

VAT is the tax agencies think about least and overpay on most. The mechanics feel settled once you are registered, so the question of whether your setup still fits the business rarely gets revisited. Meanwhile the agency changes underneath it, and a scheme that made sense at one size costs money at another.

Scheme choice is not a set-and-forget decision

The scheme you picked when you first registered was the right answer for the business you were then. As margins, headcount, and the mix of your costs change, that answer moves. The VAT Flat Rate Scheme can suit a lean agency with few VATable costs, but the same scheme can become expensive once you are spending more on software, freelancers, and other input VAT you could otherwise reclaim. The scheme that suited you at £400k of turnover may not at £1.5m.

No scheme is always the right one. What matters is looking at the choice again whenever the shape of the business shifts, instead of leaving it on autopilot for years. A short annual review is usually enough to catch the moment it stops fitting.

Recharges and disbursements: the quiet leak

The second area is how you handle client costs. Agencies routinely pay for things on a client's behalf, media spend, stock images, third-party tools, and then bill them on. Whether VAT should be added when you recharge those costs depends on whether they are genuine disbursements or simply your own costs passed through, and the two are treated differently. Get the distinction wrong and you either overcharge VAT, undercharge it, or create avoidable VAT on money that was only ever passing through.

This is exactly the kind of detail a generalist rarely sees every day but a specialist agency accountant does. It rarely shows up as a single dramatic error. It shows up as a small, steady overpayment, quarter after quarter, that nobody thinks to question.

When to register, and staying clean under MTD

Timing also matters at the edges. If your turnover is approaching the VAT registration threshold, it is worth planning the transition rather than tripping over it, because registration changes your pricing and your admin at the same time. Once registered, returns run under Making Tax Digital, so accurate, current bookkeeping is what keeps the quarterly return straightforward.

None of this is exotic. It is the kind of thing that, reviewed once with someone who knows agencies, stops leaking money quarter after quarter. Rules and thresholds change, so check the current position on gov.uk or take advice before acting, and if you want a second pair of eyes on your setup, book a call.