Expert Bookkeeping for Your Business​

Get precise, reliable bookkeeping that keeps your business on track.

Does this sound familiar?​

You’re always behind
on your books.

You dread VAT time
every quarter.

You never quite know how much money you can actually spend.

Between clients, suppliers, and staff — keeping up with the numbers just eats your time (and your weekends).

Meet Mustard Accounts — your bookkeeping team that keeps things simple.

We handle your day-to-day books, file your VAT and Payroll on time and keep you up to date with regular reports that help you plan and make the best decisions.

We are here, helping small to large business owners in the South East finally stop worrying about the books.

Staff busy working in the Mustard Accounts office.

Meet Mustard Accounts — your bookkeeping team that keeps things simple.

Staff busy working in the Mustard Accounts office.

We handle your day-to-day books, file your VAT and Payroll on time and keep you up to date with regular reports that help you plan and make the best decisions.

We are here, helping small to large business owners in the South East finally stop worrying about the books.

Why business owners choose Mustard Accounts

You always know
where you stand

Monthly reports in plain English, so you can make smart decisions fast.

You get your time back

No more late nights with spreadsheets — we keep everything up to date automatically.

Flexible Pricing

Charged either on an agreed fixed price or on an hourly rate. This gives you the flexibility of a full time bookkeeper.

What We Offer

Cost Saving

We only charge for the hours that you need us. Therefore no need for salary, holiday pay, IT equipment etc. The service is therefore scalable. We look after very small to large businesses.

Expertise Knowledge

With a team of experienced professionals, we bring industry knowledge and insights gained through years of dedicated service. Our deep understanding of bookkeeping and payroll challenges enables us to offer practical, tailored solutions for your business needs.

Accuracy and Compliance

Accuracy is at the heart of everything we do. We stay updated on all regulatory changes and best practices to ensure your finances and payroll processes are not only precise but also compliant with the latest regulations. We make sure everything is submitted to HMRC on time.

Secure and Confidential

We prioritise the security of your financial data, implementing robust data protection protocols and secure systems to safeguard your information at every step. Your confidentiality is our commitment, and we ensure that only authorised personnel have access to sensitive details.

A freehand letter m on a mustard background

Personalised
Client Service

We know that every business is truly unique, so we take the time to carefully understand your specific needs and goals. You’ll have a dedicated account manager who’s always just a call away to provide guidance, answer questions, and ensure your accounts run smoothly and efficiently.

What our clients are saying

Posted on Google Google
Tim Blockhead profile picture
Tim Blockhead
Google star 1Google star 2Google star 3Google star 4Google star 5
I couldn’t be happier with the service I receive from Accounts. We’ve worked with them for around 20 years. They are professional, knowledgeable, and always incredibly responsive. Everything is explained clearly and in plain language, which makes even complex financial matters easy to understand. They’re proactive with advice, keep everything well organised, and give me real peace of mind knowing my finances are in safe hands. I genuinely feel supported and confident in the decisions I make thanks to their expertise. I would highly recommend them to anyone looking for reliable and trustworthy bookkeepers. On a personal note Emma is an outstanding professional—confident, capable, and genuinely inspiring. Her attention to detail, integrity, and calm leadership set a high standard, and she consistently delivers excellent results while treating everyone with respect. She brings both expertise and empathy to her work, which makes her a real asset to any team. Tim Lowe – Source Labels - Director
Posted on Google Google
Andrew Organ profile picture
Andrew Organ
Google star 1Google star 2Google star 3Google star 4Google star 5
Super efficient and proactive. Moving our accounts (including credit control) has created more time for us to focus on running the business. Highly recommended.
Posted on Google Google
Simon Mcardle profile picture
Simon Mcardle
Google star 1Google star 2Google star 3Google star 4Google star 5
Brilliant people. Have recommended to others who've had the same exceptional service.
Posted on Google Google
Mark Leary profile picture
Mark Leary
Google star 1Google star 2Google star 3Google star 4Google star 5
I have been working with Emma Barnes at Mustard Accounts for over 15 years and Emma and her trusted team have been pivotal for the professional service that they have provided to our clients globally and in many different currencies. Mustard have developed over the years to be an effective and reliable bolt-on accounts resource with direct communication with our clients directly. When running your own mid-sized business you have to surround your business with the best people and service available, In Mustard we achieve this and more! Mark Leary Chairman MMG Publishing Limited
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Ready to stop worrying about your books?

Let’s make your finances feel easy again. 

Frequently Asked Questions

It’s easy to switch. Give your current bookkeepers notice and during that time we can colloborate to move the data to us. If you use online software it’s as easy as adding us as a user.

We offer a full range of bookkeeping services, including entering and managing supplier and customer invoices, paying supplier invoices, and following up on outstanding customer payments. Our services also cover credit card and bank reconciliations, expense claims, petty cash management, and financial reporting to ensure your records are accurate and up-to-date.

We offer flexible reporting based on your business needs, with options for monthly, quarterly, or annual reports.

We currently use Sage 50, Sage Online, Quickbooks and Iris Kashflow.

Yes — we work with clients all across the UK, remotely and seamlessly.

We recommend keeping electronic copies of all receipts and invoices for easy access and organised records. We can help you set up a digital record-keeping system if you need assistance, which simplifies the bookkeeping process and ensures compliance with record-keeping requirements.

Our service is customisable – you can just use the basic bookkeeping package and then add on additional services.

Our optional payroll services cover everything from wage calculations and direct deposit setup to payroll tax calculations, filings, and benefits deductions. We also provide year-end reporting.

For accounts year end submissions and personal tax returns, you’ll need to appoint an accountant. We can recommend one from our network.

We calculate VAT by analysing your sales and purchase transactions, ensuring all VAT rates are correctly applied. Once everything is reviewed and accurate, we prepare and submit your VAT return to HMRC on your behalf, meeting all deadlines to avoid penalties. Our VAT return service ensures full compliance, helping you stay up-to-date with VAT obligations.