How to Build a Strong Finance Function in Your Small Business

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More growth? More numbers. More complexity. And definitely more decisions. If you’re one of the 73% of UK small businesses feeling hopeful about 2025, now’s the time to strengthen your finance function so your business can keep up.

The challenge is turning that positive outlook into tangible progress, and that’s where a well-built finance function comes in. It’s what connects your ambition to real, data-driven decisions.

In this guide, we’ll walk you through what a strong finance function really looks like, and how to build one that grows with your business.

Move Beyond Bookkeeping to Strategic Financial Planning

Basic bookkeeping and compliance are just the foundation. As your business grows, financial management should inform strategic decision-making and forward planning.

A 2024 Global Planning Survey found 71% of finance decision-makers are taking planning more seriously amid economic uncertainty, yet 31% admit that ineffective planning has already hurt profitability.

To build a strong finance function, establish rigorous budgeting cycles and cash flow forecasts. Use financial data to guide key decisions (like pricing, expansion, or investments) rather than relying on instinct alone.

Build the Right Finance Team Structure for Growth

As a small business, you might start with a bookkeeper or outsource annual accounts. But a growing SME benefits from defined financial roles.

Consider when to bring in a financial controller or even a part-time finance director to oversee the finance function. These professionals ensure your financial records are accurate, reports are timely, and insights are translated into action. If hiring full-time senior finance staff is not feasible, leverage external expertise.

The right mix of in-house and outsourced talent can give you high-level financial guidance without the full-time cost, ensuring your finance function grows alongside your business.

Harness Technology and Data

Modern finance functions are underpinned by technology. Cloud accounting software and automation tools save time and reduce errors, freeing you to focus on analysis.

Equally important is leveraging data for performance analysis. Define key financial metrics and track them regularly. Too few SMEs currently monitor performance rigorously – nearly a third of UK small businesses do not track their productivity at all.

A strong finance function will establish dashboards and monthly management reports so you can spot trends and issues early. By measuring and reviewing financial KPIs, you create a continuous feedback loop to improve efficiency and profitability.

Strengthen Your Finance Function with Expert Support

Building a strong finance function is about elevating finance from a back-office task to a strategic partner in your business. With smart planning, the right people (or partners) in place, effective tech, and a focus on financial insights, even a small business can enjoy the financial rigour of a much larger organisation.

At Sanay, we specialise in financial controlling and outsourced finance functions for businesses in all growing sectors. Whether you need day-to-day bookkeeping or a seasoned financial controller to guide your strategy, contact us today to see how we can support your next stage of growth.