Your Agency Is Growing.
Are Your Finances Keeping Up?
More clients, bigger projects and a growing team are exciting. But they can also make managing your agency’s finances more complicated.
At Simplex, we provide accounting, bookkeeping and tax support for marketing agencies across the UK.
Whether you’re running a small creative team or scaling your agency, we’ll help you understand your numbers, stay on top of your tax obligations and make confident business decisions.
Save Time
Spend less time managing finances and more time running your agency.
Know Your Profit
Understand what your agency earns after salaries, freelancers and expenses.
Plan for Growth
Make better decisions about hiring, investing and expanding your agency.
Accounting that understands how you work
Running a marketing agency comes with its own financial challenges.
You’ve got client retainers, project-based income, freelancers, software subscriptions and potentially a growing payroll to manage.
And while your revenue might be increasing, that doesn’t always mean your profit is growing with it.
We help agency owners understand where their money is going, what they’re actually making and how to plan for what’s next.
Less financial guesswork. More clarity for your agency.
Accounting Services for Marketing Agencies
Whether you’re managing a handful of clients or building a larger team, we’ll help keep your finances organised.
Bookkeeping & Xero Accounting
Keep track of retainers, project income, software subscriptions and business expenses with accurate bookkeeping and Xero accounting support.
Annual Accounts & Corporation Tax
Stay on top of your statutory accounts, Corporation Tax returns and tax obligations, with support to help you plan ahead.
VAT & Payroll Services
From VAT returns and Making Tax Digital compliance to employee salaries and payroll reporting, we’ll help you manage your responsibilities as your agency grows.
Ongoing Accounting Support
Get straightforward guidance on hiring, business expenses, cash flow and taking money out of your company, so you can make informed decisions.
“Simplex are super easy to work with. I love that I have a portal to track all documents and paperwork that need my attention. Everything else just seems to run in the background so I can focus on my business.”
Jordan, Designer
Three Ways We Help Your Agency Grow
Understand Your Profit: Know how much your agency is actually making after freelancers, software, salaries and other costs.
Plan With Confidence: Make informed decisions about hiring, investing and growing your agency without relying on your bank balance.
Save Valuable Time: Spend less time managing your accounts and more time focusing on your clients, team and business.
Why Businesses Choose Simplex
✅ Keep your finances organised and accessible with accurate, Xero-based accounting.
✅ Understand your numbers with clear, straightforward advice and no confusing jargon.
✅ Stay ahead of deadlines and make confident decisions with ongoing support throughout the year.
✅ Grow your agency with a clearer understanding of costs, profitability and what you can afford.
✅ Save time with flexible, remote accounting support, wherever your agency is based in the UK.
“Lucy and the team are always so helpful and efficient. I trust them to take care of all my accounting so I don’t have to worry about anything! Great service.”
Catherine, Florist
Smart Tools, Simple Accounting
We set you up with easy, reliable tools so your finances stay organised without adding to your to-do list. Everything is customised for the way you work, and we’re always here if you need help.
Xero
Stay organised without spreadsheets.
See your income, expenses and invoices in one place, always up to date and ready when you need it.
dext
No more chasing receipts.
Snap a photo or forward an email, and your bills and receipts are stored, sorted and matched to your accounts.
brightpay
Stress-free payroll.
Payslips, pensions and submissions are taken care of, always on time and fully compliant with HMRC.
Getting Started is Easy!
We’ve made it simple for you to get the help you need:
Book a Call
Tell us about your business and what you need.
Send Your Info
Share your financial details securely online.
We Do the Work
We’ll sort your accounts and keep everything up to date.
Stay in Control
Get updates and support, so you always know where you stand.
Book your discovery call! It will only take a minute
Time to Switch Accountants?
You don’t need to stay stuck with support that’s slow or confusing. Switching to Simplex is smooth and handled for you.
Seamless Transfer
We contact your previous accountant and securely transfer your records, handling the switch for you.
No Disruption
Your accounts stay up to date while we handle the switch, so nothing gets missed.
A Fresh Start
We review your numbers, identify gaps, and get you set up with a clear plan that works for you.
Helpful Resources
Your Questions, Answered
We know you might have some questions, and we’re here to make everything as clear and straightforward as possible. If you need more information, don’t hesitate to reach out, we’re always happy to help!
An accountant for marketing agencies helps you manage your finances, reduce your tax bill and keep your business running smoothly. This includes bookkeeping, VAT returns, payroll, corporation tax and financial planning. We also help you understand your agency’s profitability, manage cash flow and plan for growth. Whether you’re running a small creative agency or managing a growing team, having an accountant who understands marketing businesses can make a real difference.
While there’s no legal requirement for marketing agencies to hire an accountant, having one can save you time, money and unnecessary stress. Agencies often deal with multiple clients, freelancers, software subscriptions and fluctuating income, which can make finances complicated. A specialist accountant can help you stay compliant with HMRC, claim allowable business expenses and make better financial decisions. That means you can spend less time worrying about numbers and more time growing your agency.
Marketing agencies can usually claim a range of allowable business expenses to reduce their taxable profits. These may include advertising costs, software subscriptions, website hosting, office expenses, freelancer fees, professional insurance and business travel. Equipment such as laptops and cameras may also qualify for tax relief. The key is making sure expenses meet HMRC’s rules and are recorded correctly. We help marketing agencies identify allowable expenses so they don’t pay more tax than necessary.
The cost of an accountant for a marketing agency depends on your business size, turnover and the support you need. Some accountants charge hourly rates, while others offer fixed monthly packages covering bookkeeping, tax returns, payroll and ongoing advice. A fixed monthly fee can make budgeting easier and help you avoid unexpected bills. We believe accounting should be straightforward, with clear pricing and support tailored to your agency’s needs.
Absolutely. A good accountant does more than prepare accounts and file tax returns. We can help you understand which clients and services generate the most profit, manage cash flow and plan for future growth. By reviewing your costs, pricing and financial performance, you can make more informed business decisions. Whether you’re hiring your first employee or scaling an established agency, the right accounting advice can help you build a more profitable business.
