Accountant for Marketing Agencies UK: What You Actually Need
Marketing agencies run a messier set of books than most limited companies: retainer income sitting next to one-off project fees, a bench of freelancers instead of a stable payroll, and client media spend flowing through your account that isn't really your money. Generic bookkeeping software and a generalist accountant will happily process all of it and still get the underlying numbers wrong. Here's what actually matters when you're choosing who looks after your agency's accounts.
Why agency accounting isn't generic bookkeeping
Most agencies bill in at least two or three different ways at once: monthly retainers, fixed-price projects, and sometimes a commission or markup on media spend. Each of those needs to be recognised differently in your accounts, and an accountant who treats every invoice the same way will hand you a profit and loss account that doesn't reflect what's actually happening in the business.
Get project revenue recognition wrong and you can end up paying corporation tax on income you haven't actually earned yet, or understating profit in a way that makes the business look worse than it is to a lender or a buyer. This is one of the first things worth asking a prospective accountant about directly: how do they treat a six-month project that spans two accounting periods?
IR35 and your freelance bench
Most agencies work with a rotating bench of freelance creatives, strategists and specialists, and it matters where the IR35 risk actually sits. Under the off-payroll working rules, a client only has to determine a contractor's IR35 status, and carry the liability if it gets that wrong, once the client counts as medium or large under the Companies Act's small companies test (turnover, balance sheet total and headcount, assessed together). Below that size, the older rules apply: the freelancer's own limited company stays responsible for getting its own IR35 status right, not you.
Most marketing agencies sit well under those thresholds, so if you're a 10 or 20-person shop paying freelancers through their own limited companies, the determination isn't your job yet. Still, know where the line is. If you're scaling toward that size, or you're already past it, the obligation and the liability shift onto you, and a badly worded contract or working practice can leave you covering someone else's tax bill.
VAT on media spend and recharges
When you buy ad space or media on a client's behalf and pass the cost straight through, whether VAT applies to that recharge depends on whether HMRC treats you as acting as an agent or as a principal. Get it wrong and you either charge VAT you didn't need to, which annoys the client, or fail to charge VAT you should have, which becomes your problem when HMRC reviews your return.
The test isn't what your contract calls you, it's a set of specific conditions: whose name is on the supplier invoice, who carries the risk if the client doesn't pay, whether you disclosed the exact cost separately, and whether you added a markup. An accountant who hasn't worked with agencies before will often default to charging VAT on everything you recharge, which keeps HMRC happy but can quietly eat into your margin on media-heavy accounts.
What to look for when choosing one
You want someone qualified and regulated, ICAEW chartered rather than unqualified, so there's a professional body standing behind the advice you're getting. Beyond that, ask direct questions about agency-specific scenarios: how they'd handle a project that straddles two year-ends, how they've dealt with IR35 for a client your size, and whether they've ever had to unpick a VAT recharge mess on media spend.
Software can automate the bookkeeping, the invoice matching, and the bank reconciliation. It can't judge whether a six-month project should be recognised in this accounting period or the next, or whether your contractor arrangement would survive an HMRC status check. You want both: automation for the volume, and a qualified accountant reviewing the judgement calls that actually move your tax bill.
Frequently asked questions
Do I need an accountant who has worked with agencies specifically, or will any general practice do?
A general practice can file your accounts and your VAT return without issue. Where it tends to fall short is on judgement calls specific to agencies: recognising retainer versus project revenue correctly, knowing where IR35 responsibility actually sits for a business your size, and getting the agent-versus-principal VAT test right on recharged media spend. None of that is exotic, but it's easy to get wrong if you haven't seen it before.
How does IR35 actually affect my agency if most of my team are freelancers?
It depends on your agency's size. If you're below the Companies Act small companies thresholds on turnover, balance sheet total and headcount, the responsibility for determining IR35 status sits with each freelancer's own limited company, not with you. Once you grow past those thresholds, that responsibility and the associated liability shift onto your agency, so it's worth knowing which side of the line you're on before you scale your freelance bench further.
Is the media spend I buy on a client's behalf and recharge to them subject to VAT?
It depends on whether HMRC would view you as acting as an agent or a principal in that transaction, which comes down to things like whose name is on the supplier invoice, who bears the credit risk, and whether the exact cost was disclosed and passed through without a markup. There isn't a single answer that applies to every agency, which is exactly why it's worth getting an accountant to look at your specific media buying arrangement rather than assuming.