Small business finance: records, taxes, costs and cash
The financial basics of an established business, from bookkeeping and taxes to costs, funding and the self-employed.
In this topic: Knowledge base 7
Finance: the engine behind your business
Records that hold up, taxes you can plan for, costs you understand and cash you can see coming: the financial basics of an established business, explained for any country.
Finance is more than bookkeeping. The same figures that keep the tax authority satisfied also tell you which customers earn money, which costs have crept up and when the account will run low. Businesses that look at them every month see problems while there is still time to act; businesses that only look once a year find out from their accountant, or their bank.
This theme is written for owners of small and medium-sized businesses and for the people who advise them. Each article explains the principle first and then shows how it works in major markets such as the US, the UK, the EU, Canada and Australia, with links to the official sources. If you are just starting, the Start a business theme covers the first steps, from tax and bookkeeping to your first cash flow forecast.
Tax rates, thresholds and deadlines change every year and differ per country, which is why these articles describe how the rules work rather than quoting amounts. Check the official source in your own country, or ask your accountant, before you act.
Finance and administration for small businesses
Twelve articles in four groups, from the records you must keep to the car you drive.
Administration and tax
- Bookkeeping and records: what you must keep, for how long, and how to choose a system.
- Business taxes: which taxes you pay or collect, and when the money leaves your account.
- The finance function: the difference between keeping the figures right and using them to steer.
- Exchange rates and currency risk: which rate to use and how to protect your margin.
Profit, costs and funding
- Ten financial tips for SMEs: habits from a rolling cash forecast to a well-informed bank.
- Reduce costs and improve profit: start from your industry's cost structure.
- Activity-based costing: the real cost of products and customers.
- Grants and public funding: R&D incentives, guarantees, export support and how to apply.
The self-employed
- Contractor or employee: how authorities judge the way work is done.
- Income protection for the self-employed: what happens to your income when you cannot work.
- Pension for the self-employed: building retirement income without an employer.
Company car
- Company car: buy, lease or private: compare total cost per kilometre after tax, and how private use is taxed.
Why financial insight pays
Banks feel it first when a business gets into trouble, and small firms usually feel tighter credit before large ones do. In the European Central Bank's survey on access to finance, small and medium-sized firms reported a further fall in the availability of bank loans while large firms reported an increase (source: European Central Bank, July 2026). A business that can show its figures, its forecast and its plan is in a better position at exactly that moment.
Five ratios every owner should know
- Gross margin: what is left of each sale after the direct cost of the product or service. It shows whether your prices and purchasing are right.
- Net profit margin: what is left after all costs. Compare it with your industry to see whether your overheads are in line.
- Current ratio: short-term assets divided by short-term debts. It tells you whether you can pay what falls due in the coming months.
- Equity ratio: the share of the business financed with your own money. Lenders look at it to judge how much risk they carry.
- Days sales outstanding: how long customers take to pay. Every extra day is money you are lending to your customers for free.
These ratios mean most when you set them against your own history and against your industry. The industry figures give the outside view; the financial analysis for strategy shows how to read them together.
The financial cycle of a healthy business
- 01
Keep your records in order
Book every month, separate business and private money and keep documents the way the law asks. See bookkeeping and records.
- 02
Analyse every month
Compare revenue, margin and costs with the budget and the same month last year, and ask why each large difference arose.
- 03
Steer on cash
Keep a rolling cash forecast for the coming months, chase late payers early and agree financing before you need it.
- 04
Improve costs and revenue
Find the largest gaps with your industry, cut where it does not hurt customers and check which products and customers really earn money.
- 05
Use grants and tax incentives
Check every year which public schemes fit your investments, research or exports, and apply before you commit the money.
What poor bookkeeping costs
The direct costs are visible: penalties and interest for late or wrong returns, extra hours from your accountant to repair the books, a loan application that stalls because the figures are not ready. The indirect costs are larger and quieter: decisions on prices, staff and investments made on feeling instead of facts, and problems noticed months after they began.
Block one fixed morning a month for your figures: book what is left, compare with the budget, update the cash forecast and write down three actions. Small, regular attention prevents most of the expensive surprises.
Should I do my own bookkeeping as a small business owner?
What is the difference between profit and cash?
How do I know whether my margin is good for my industry?
How often should I look at my financial figures?
Sources
- European Central Bank: Survey on the access to finance of enterprises in the euro area (July 2026)
- Your Europe: Practical guide to doing business in Europe (October 2026)
- US Small Business Administration: Manage your business (October 2026)
- GOV.UK: Running a limited company, your responsibilities (October 2026)