Every organisation, from a one-person start-up to a multinational, needs to manage money deliberately. The finance function is the department (or, in a small firm, the person) responsible for handling the organisation's money so that it can meet its objectives. Its work falls into three connected areas.
1. Financial planning. Looking ahead and preparing budgets, cash-flow forecasts and investment appraisals so the firm knows how much money it will need, when, and where it will come from. Good planning prevents the single biggest cause of small-business failure — running out of cash.
2. Recording (bookkeeping). Keeping an accurate, systematic record of every transaction — sales, purchases, wages, loans. These records feed the final accounts (income statement and balance sheet) and are usually a legal requirement for tax and, for companies, for shareholders and auditors.
3. Decision-making. Turning the numbers into choices: which project to invest in, whether to raise finance by loan or by selling shares, how to price a product, whether the firm can afford to expand. Finance provides the information that lets managers make evidence-based decisions rather than guesses.
Crucially, finance is a support function — it exists to help the organisation achieve its broader objectives (growth, profit, survival, ethical or sustainability goals), not as an end in itself.