If you run a marketing agency in the UK and you're looking for an accountant, the first question is usually the same: what will it cost?

It's a fair question. You're running a business. You want to know what you're paying for and whether it's worth it. The problem is that most accountants don't publish their pricing. And the ones that do often quote a figure that changes the moment they hear the word "agency".

This guide gives you real numbers for 2025/26. It covers what an agency accountant actually does, what drives the cost up or down, and how to tell whether you're getting good value or just paying for a bookkeeper with a fancy letterhead.

What Does an Agency Accountant Actually Do?

Before we talk about price, we need to talk about scope. Because the cheapest option is rarely the right one, and the most expensive one is often overkill.

A proper agency accountant should handle at least these six things:

  • Company accounts and Corporation Tax, preparing annual accounts and filing your CT600 with HMRC
  • Management accounts, monthly or quarterly P&L, balance sheet, and cash flow so you know where your agency stands
  • Payroll and RTI, running your salary, processing PAYE, and filing Full Payment Submissions on or before payday
  • VAT returns, quarterly or monthly, including Flat Rate VAT if you're on it and checking whether the limited cost trader rules apply
  • Dividend paperwork, preparing dividend vouchers and minutes, and making sure you're drawing within retained profits
  • Tax planning, not just compliance. Structuring your salary and dividends to minimise your overall tax bill, advising on pension contributions, and planning for exit.

Some accountants include all of this in a fixed monthly fee. Others charge extra for management accounts, tax planning, or ad-hoc advice. Always check what's included before you sign.

Real Agency Accountant Costs for 2025/26

The figures below are based on what ICAEW qualified firms like ours charge for agency clients. They are not the cheapest on the market. They are also not the most expensive. They reflect the level of service a growing agency actually needs.

Sole Trader or Freelance Agency (turnover under £50k)

£90 to £150 per month

If you're a freelance web designer or a solo PR consultant turning over £35k-£45k, you need someone to file your Self Assessment, help with VAT if you're registered, and give you basic tax planning. You probably don't need monthly management accounts. You need a clean year-end and someone to answer questions when they come up.

At this level, the accountant is handling compliance and occasional advice. You'll typically get a fixed monthly fee and a call once or twice a year.

Small Limited Company (1-3 people, turnover £50k-£200k)

£150 to £250 per month

This is the sweet spot for most agency founders who have incorporated. You're paying yourself a salary and dividends. You have a handful of contractors or one employee. You need quarterly management accounts so you can see whether your gross margin is holding up. You need someone who understands IR35 and can tell you whether your contractor engagements are safe.

At this price point, you should expect a dedicated contact, not a call centre. Your accountant should know your agency's numbers without having to open a file.

Growing Agency (4-10 people, turnover £200k-£750k)

£250 to £400 per month

Now you have staff, contractors, retainer clients, project work, and probably a mix of VAT schemes. You need monthly management accounts with commentary. You need cash flow forecasting. You need someone who can help you model the tax impact of taking on a new partner or buying out a shareholder.

Your accountant should be attending quarterly review meetings with you, either in person or on Zoom. They should be flagging issues before they become problems, not after.

Established Agency (10+ people, turnover £750k+)

£400 to £800+ per month

At this size, your agency has multiple revenue streams, a proper team, and probably a holding company structure. You need consolidated accounts, group VAT returns, R&D tax credit claims (if you're doing qualifying development work), and strategic tax planning for exit.

You also need an accountant who can work alongside your finance person or FD. The monthly fee reflects the complexity and the seniority of the advice. You are paying for experience, not just data entry.

What Drives the Cost Up?

Not all agencies are the same. Two agencies with the same turnover can have wildly different accounting fees. Here is what pushes the price higher:

  • High transaction volumes, If you process 500 invoices a month and have 200 expenses, that takes more time than a business with 30 transactions. Some accountants charge by transaction count. Others absorb it into the monthly fee. Ask.
  • Multiple entities, A holding company with two trading subsidiaries means three sets of accounts, three CT600s, and consolidated management accounts. That costs more.
  • R&D tax credits, Preparing a compliant R&D claim takes specialist knowledge and time. If your agency builds software, automates processes, or develops new tools, expect an extra charge or a higher base fee.
  • IR35 work, If you have contractors, your accountant needs to review SDSs, check the CEST tool output, and advise on status. This is not standard compliance work.
  • Ad-hoc projects, Fundraising, due diligence, exit planning, share restructuring. These are separate projects with separate fees. A good accountant will scope them upfront and quote a fixed price.
  • Location, London and South East firms tend to charge 20-30% more than firms in Manchester, Birmingham, or Bristol. The quality difference is often negligible. We are based in Manchester and work with agencies across the UK and UAE. Our fees reflect regional pricing, not London overheads.

What Drives the Cost Down?

You can keep your accounting costs lower by doing a few things well:

  • Use accounting software properly, Xero, QuickBooks, or FreeAgent. If you keep your records clean and reconcile regularly, your accountant spends less time fixing messes. We recommend Xero for most agencies because of its project tracking and reporting capabilities.
  • Use receipt capture tools, Dext or AutoEntry. Scan receipts as you get them, not six months later.
  • Keep your director's loan account clean, If you borrow from the company and repay within 9 months of year-end, you avoid the S455 tax charge at 33.75%. If you don't, your accountant has to file additional returns and calculate the charge. That costs time and money.
  • Send your paperwork on time, If you're sending bank statements and invoices in February for a January year-end, your accountant has time to plan. If you send them in March, they're rushing. Rush jobs cost more.

Fixed Fee vs Hourly: Which Is Better for Agency Founders?

Most good agency accountants charge a fixed monthly fee. This is better for you because you know what you're paying and can budget for it. It also aligns incentives: if your accountant is efficient, they keep the margin. If they're not, they eat the overrun.

Hourly billing creates a perverse incentive. The longer the accountant takes, the more they earn. That is not a model that rewards efficiency or good systems.

We charge fixed monthly fees for all our agency clients. The fee covers compliance, management accounts, tax planning, and ad-hoc advice within reason. If a project falls outside scope, we quote a fixed price before starting work.

What Should You Ask Before Hiring an Agency Accountant?

Before you sign an engagement letter, ask these questions:

  • "Do you work with other agencies?", If they say no, ask why. Agencies have specific issues (IR35, retainer vs project accounting, utilisation tracking). A generalist may not understand them.
  • "What software do you recommend?", If they say "whatever you like" without giving a reasoned opinion, they don't have a strong view. That is fine for some businesses. For an agency, it matters.
  • "Who will be my main contact?", You want a qualified accountant, not a junior bookkeeper. Ask to speak to them before you commit.
  • "What is not included in the monthly fee?", Get it in writing. Surprise bills are the number one complaint we hear from founders who switched to us.
  • "Do you have ICAEW accreditation?", ICAEW qualified accountants follow a strict code of ethics and professional standards. It is not a guarantee of perfection, but it is a strong signal of competence and accountability.

Is It Worth Paying More for an Agency Specialist?

In our experience, yes. But only if the specialist actually understands agency finance, not just marketing.

An agency accountant should know what utilisation rate means. They should be able to look at your management accounts and tell you whether your gross margin is healthy for your sector (digital agencies should target 50-65%). They should understand why retainer income is more valuable than project income and how to structure your company for an exit.

If your accountant does not know these things, you are paying for compliance only. You are not getting advice. And for an agency founder, advice is where the value is.

If you want to see whether we might be the right fit, book a call. We will tell you honestly whether we can help and what it would cost. No hard sell. Just a straight conversation.

Summary

Here is the short version:

  • Sole trader: £90-£150 per month
  • Small limited company (1-3 people): £150-£250 per month
  • Growing agency (4-10 people): £250-£400 per month
  • Established agency (10+ people): £400-£800+ per month

These are ranges for ICAEW qualified firms providing proper agency accounting, not just compliance. You can pay less. You can pay more. What matters is that you know what you are getting and whether it matches what your agency actually needs.

If your current accountant is not giving you management accounts, not advising on tax structure, and not returning your calls within 24 hours, you are probably overpaying regardless of the monthly fee.