Most Businesses Don't Outgrow Their Accountant Overnight
Very few business owners wake up one morning and decide to change accountants.
In my experience, it usually happens gradually.
A VAT query takes several days to answer. Payroll becomes more demanding after taking on new employees. An HMRC letter is left unopened because nobody is certain what it means. Management reports arrive weeks after month-end, making them less useful for planning the business.
What I often notice is that the business itself has moved forward, but the financial systems haven’t kept pace. The spreadsheets that worked in the early days are now taking hours to update. Bookkeeping is squeezed around customer work, and reliable financial information always seems to be a few weeks behind.
Growing businesses rarely need more complicated accounting. They need better systems, clearer communication and advice that keeps pace with the way the business is changing.
That’s why I started Best-Assistant Accounting Ltd. My aim is to help businesses across Buckingham build accounting processes that support growth, giving owners the confidence to make informed decisions long before deadlines become a concern.
Hello, I’m Polina, Founder and Director of Best-Assistant Accounting Ltd.
I’ve worked in accounting and payroll for more than ten years, supporting start-ups, sole traders, contractors, consultants and growing limited companies throughout the UK.
Before launching my own practice, I met many business owners who felt they had outgrown the support they were receiving. They weren’t asking for complicated financial advice. They simply wanted an accountant who answered the phone, explained things clearly and understood how their business actually operated.
That experience shaped the way I work today.
When you become a client, you’ll always deal directly with me. There are no account managers or support teams standing between us. I believe understanding your business is just as important as understanding your accounts.
I’m AAT Level 3 qualified and currently completing AAT Level 4. I also hold an ICB Level 3 Diploma in Payroll Management, I’m an Associate Member of ACIPP, and Best-Assistant Accounting Ltd is AML registered, ICO registered and professionally insured. I was also proud to be shortlisted as a Startup of the Year finalist.
What Changes As A Business Begins To Grow?
One of the biggest misconceptions I see is that accounting stays the same as a business grows.
In reality, growth changes almost everything.
The bookkeeping system that worked for a sole trader often struggles once employees join the business. VAT registration brings additional responsibilities. Payroll becomes more detailed, and business owners begin making decisions that depend on accurate financial information rather than rough estimates.
This is often the stage when clients contact me.
They don’t necessarily need more accounting services. They need accounting that’s better suited to where the business is today.
Helping clients strengthen their financial processes before they become obstacles is one of the most valuable parts of my role.
Common Accounting Challenges I Help Solve
My accountant is difficult to reach
Get direct access to someone who understands your business and responds when you need advice.
We're still relying on spreadsheets
Move to cloud accounting with a structured, well-managed transition.
Our bookkeeping no longer fits the business
I’ll help create systems that are easier to manage as your business grows.
We need help with CIS
Support with subcontractor verification, deductions and monthly returns.
Businesses I Regularly Support Around Buckingham
Many of the businesses I work with have reached a similar stage. They’re winning more work, employing more people and handling larger workloads than ever before, yet their financial systems haven’t evolved at the same pace.
I regularly support builders, estate agents, consultants, retailers and professional service businesses across Buckingham, Maids Moreton, Tingewick and Stony Stratford, helping them introduce practical accounting processes that support continued growth.
What They Say About Me
Clients trust Best-Assistant Accounting Ltd because I stay personally involved with communication, advice, and ongoing support. I believe relationships matter in accounting, and I work hard to build long-term trust with every client.
Posted on Google K DTrustindex verifies that the original source of the review is Google. Fantastic service from Polina, highly recommend her to others. Excellent communication and high standards of work.Posted on Google Rumyana MitevaTrustindex verifies that the original source of the review is Google. Highly professional and reliable service! You can definitely trust Polina Dimitrova for your financial matters!Posted on Google Juliana ImbrovschiTrustindex verifies that the original source of the review is Google. Paulina is super knowledgeable and helpful. She has really given me the confidence to manage my business' accounts. She is always available to help with any queries. Highly recommend Imbrovschi LimitedPosted on Google Rowena BoshoffTrustindex verifies that the original source of the review is Google. Very helpfull. Efficient. Highly recommend. So happy i found Polina. She makes one feel at home. Thank you for helpng Beyondbalanc.ukPosted on Google Shez KhanTrustindex verifies that the original source of the review is Google. Polina is absolutely amazing! I have had an extraordinary experience with her. She explains and supports me in such a way that I would never look elsewhere. She's a gem, my anchor to the business. I highly recommend her. There are no words to describe her as she is exceptionally going above and beyond. Supreme Clean Domestic and Commercial Cleaning Services LtdPosted on Google Hristo HristovTrustindex verifies that the original source of the review is Google. Polina is very knowledgeable, polite and professional accountant. Nothing is too much trouble and she is happy to go an extra mile to provide the best service. I would highly recommend, don't think twice!Posted on Google KristianoTrustindex verifies that the original source of the review is Google. Very good service, been using them for a few years now for my tax returns and I highly recommend!Posted on Google I. DamyanovaTrustindex verifies that the original source of the review is Google. Very professional lady. Excellent work.Posted on Google Ruth ThorpeTrustindex verifies that the original source of the review is Google. Excellent service. Helped me with my SA which is now correctPosted on Google James BurrowsTrustindex verifies that the original source of the review is Google. I highly recommend, especially that I have autism and I have found them very helpful and patient which has made the experience.
Week One – Understanding The Business
We'll discuss how your business currently operates, where you're spending unnecessary time and which areas need the most attention.
Week Two – Reviewing Your Records
I'll assess your bookkeeping, payroll and accounting records to identify opportunities for improvement without disrupting what's already working.
Week Three – Strengthening The Systems
Together we'll prioritise practical improvements, whether that's introducing cloud accounting, improving reporting or simplifying payroll.
From Month One Onwards
Once stronger systems are in place, I'll continue supporting your bookkeeping, payroll, tax planning and day-to-day accounting as your business continues to grow.
What Happens During Your First Month?
Case Study: Helping A Buckingham Property Maintenance Business Improve Financial Control
The Challenge
A growing property maintenance company had expanded from one owner into a small team, but its accounting processes hadn’t changed. Payroll, supplier invoices and CIS records were all managed separately, making monthly reporting unreliable.
What We Did
I reviewed approximately 920 transactions, introduced cloud accounting, reorganised payroll records and established a structured monthly bookkeeping process.
The Result
Within five months, administration time reduced by around 23%, reporting accuracy improved significantly and the owner gained much clearer visibility of labour costs, supplier spending and future tax commitments.
Frequently Asked Questions
It often happens when additional staff, VAT registration or higher workloads begin creating more administration than existing systems can comfortably handle.
Yes. Well-organised bookkeeping reduces duplicate work, makes reporting faster and gives you reliable information without spending hours searching for it.
Not automatically. I review how your business currently operates before recommending software, ensuring any changes genuinely improve efficiency.
Monthly reviews usually provide the best balance between staying informed and avoiding unnecessary administration.
Absolutely. Where existing systems are working well, I'll improve them rather than replacing them unnecessarily.
When Your Business Grows, Your Accounting Should Too
The systems that helped your business get started won’t always support where it’s going next. As your workload increases and financial responsibilities become more complex, having accurate information and reliable advice becomes increasingly important.
If your current accounting processes are beginning to slow the business down, I’d be pleased to help you build stronger financial systems that support your next stage of growth.
Get in touch today to discuss your business and discover how accurate financial information can support better business decisions.