Managing your startup’s finances can feel daunting, and most founders I work with did not start a business because they love accounting. The good news is that you do not need to become an accountant. You do need to be financially literate enough to read what your numbers are telling you, make decisions on evidence rather than instinct, and know when to bring in professional help. This guide covers the essentials: the three financial statements every founder should understand, how to manage the one that actually kills businesses (cash flow), how to budget, where to control costs sensibly, and how to choose accounting software. Buy good software and hire a good accountant; this guide is about understanding what they produce.
The Three Financial Statements
Almost everything in financial management comes back to three statements: the profit and loss account, the balance sheet, and the cash flow statement. Understand these three and you understand the shape of your business.
The Profit and Loss Account
The profit and loss account, also called the P&L, income statement or income and expense statement, measures performance over a period, usually a month, quarter or year. It starts with your sales, then subtracts costs to arrive at profit. The order in which those costs are subtracted determines the different kinds of profit founders hear about.
Your cost of goods sold (COGS) is the cost directly tied to producing what you sell: raw materials and production labour for a manufacturer, for example. Sometimes you will also see direct sales costs broken out separately, things like logistics, customs, commissions and discounts that relate to selling rather than producing. Sales minus COGS gives you gross profit, the most basic measure and the one that has to cover everything else.
Below that sits your operating expenditure (OPEX), mainly salaries and the general running costs of the business that are not part of production. There are also non-cash and financing adjustments: depreciation (the gradual write-down of fixed assets such as vehicles or computers), amortisation (the same idea applied to intangible or non-fixed items), interest on loans and finance, and tax on profits.
Strip those out in stages and you get the profit measures that matter. EBITDA (earnings before interest, tax, depreciation and amortisation) is a useful indicator of underlying operating performance because it removes financing and accounting effects. Take interest and tax off the operating profit, and you reach net earnings, also called net income, which is the money actually left for shareholders or reinvested in the business as retained earnings.
The Balance Sheet
The balance sheet is a snapshot of what the business owns and owes on a particular date. Fixed assets are the longer-term things that help you run the business, such as equipment or vehicles, shown at their current book value. Current assets are cash or near-cash: stock ready to sell, money owed to you by customers, and cash in the bank. Liabilities are what you owe. Subtract total liabilities from total assets and you have the net value of the business on that date.
The Cash Flow Statement
Cash flow is the movement of money into and out of the business over a period, and for a startup, it is the statement that matters most day-to-day. You can be profitable on paper and still fail, because profit is not cash. If you do not have the money to pay staff and suppliers when they are due, the business stops, regardless of what the P&L shows. Keeping a positive working capital position is the founder’s single most important financial discipline.
Cash Flow Management: The Founder’s Priority
Working capital is current assets minus current liabilities, and a business is solvent when it can meet its short-term debts as they fall due. Businesses hold working capital for three practical reasons: to fund day-to-day operations while waiting to be paid; to bridge the gap between paying suppliers and producing or buying stock and actually selling it; and to provide a buffer for the unexpected, since timing rarely works out exactly as planned. Run short on any of these and an otherwise healthy business can hit a wall.
Managing cash is about much more than checking the bank balance. It comes down to four habits.
The first is customer relationships and credit control. Winning new clients matters little if they do not pay you, so credit-check new customers before you work for them, agree clearly how and when they pay, and make it easy by offering options and early-payment incentives. Build relationships strong enough that a client will tell you in advance if they will be late, because a client who feels unable to have that conversation is the one who does not pay at all. If payment problems persist, be willing to end the relationship.
The second is supplier management. Choose suppliers deliberately and keep the list lean, since there is little value in multiple suppliers for the same thing. Tell suppliers what you plan to spend and use that to negotiate. Take early-payment discounts where they genuinely pay off, but do not pay before you have to; money is better in your account than theirs until it is due.
The third is internal controls. Too many people spend money without seeing the cash-flow consequence. Start with a clear budget covering both day-to-day expenditure and capital purchases; confirm spending against that budget before it is authorised; and require senior sign-off for anything unbudgeted, including a check that the cash is actually there. Run and review an aged-debtor report every week, and chase large or overdue invoices early rather than late.
The fourth is forecasting. Forecast cash at least weekly, compare actual income and expenditure against what you expected, and investigate any large variance rather than letting it slide. A simple rolling cash forecast, kept up to date, is the difference between seeing a squeeze coming and being surprised by it.
Budgeting: Turning Plans Into Numbers
A budget is how you turn intentions into a plan you can manage against. Before you can make money you have to decide how you will spend it, and committing those numbers to paper lets you anticipate needs, spot problems early, and make changes before they become crises. Build a budget before you commit to anything significant, such as a new lease or major equipment, because it is far better to discover you cannot afford something before you sign than after.
A budget brings together your expected revenues, your costs and the resulting profit or cash flow. Revenue is the cornerstone, so estimate it as accurately as you can and err on the cautious side; last year’s actuals, if you have them, are the best starting point. Costs divide into fixed (rent, insurance and other expenses that do not move with sales), variable (raw materials, stock and freight that rise and fall with volume), and semi-variable (costs like salaries or advertising that are broadly fixed but flex with the level of business). Setting a budget is the easy part; sticking to it is the discipline that matters, and a budget you ignore is just a document.
The real value comes from reviewing actual performance against the budget every month, investigating variances, and understanding why they occurred so that next year’s budget is better. For a fuller treatment of building and holding to a budget, see our guide to setting a business budget and sticking to it, and for the management reporting that sits on top of it, our guide to management accounts for small businesses.
Controlling Costs Without Cutting Muscle
Cost control should be a continuous habit rather than an emergency response, and the aim is to eliminate waste without undermining the drivers of sales. A few areas reliably repay attention.
Premises and people are usually the largest costs, so question assumptions about both. Many founders assume a central, prestigious location adds value, but for most businesses it is the product or service that drives sales, not the address; if location is only a minor factor for you, a cheaper or serviced space frees up capital. Hybrid and remote working, now standard rather than novel, can let you reduce premises through hot-desking while improving retention. Overheads are the quiet drain: too few businesses interrogate their utility, telecoms and insurance bills. Understand your consumption over at least a year, use that knowledge to reduce usage and to negotiate better deals, and review renewable contracts such as insurance annually rather than letting them roll over. And review your processes themselves, because doing the same work with less duplication is a more durable saving than squeezing suppliers.
The principle underneath all of this is that cost reduction is not purely defensive. Done well, it forces you to re-examine your value proposition and usually makes the business leaner and more competitive, not just cheaper.
Choosing Accounting Software
You are a founder, not a bookkeeper, and your time is better spent running the business than manually updating ledgers and chasing entries. Modern cloud accounting software handles the number-crunching, keeps your records in order, and produces the reports you and your accountant need. In the UK, it is also how you meet Making Tax Digital requirements. For the very smallest or simplest operations, a spreadsheet can suffice, but for most businesses, software is the better choice, and starting with it from day one is far easier than migrating from spreadsheets later. If you are just starting, or growing quickly enough that a manual system is becoming a bottleneck, that is the signal to put proper software in place.
How SGI Helps
Understanding your numbers is the foundation; using them to make better decisions is where the value is. We help founders put the financial controls, reporting and forecasting in place that turn financial management from a compliance chore into a decision-making tool, and we work alongside your accountant rather than replacing them. If you want help getting your startup’s finances onto a sound footing, our financial management consulting service is built for exactly that, or you can book a free consultation. For the compliance side of running a UK business, see our guide to financial regulations and compliance.
Frequently Asked Questions
What is the difference between profit and cash flow?
Profit is what is left after you subtract costs from sales over a period; cash flow is the actual movement of money in and out of your bank account. They differ because of timing: you can record a profitable sale but not yet have been paid for it, or pay for stock long before you sell it. A business can be profitable on paper and still run out of cash, which is why founders should watch cash flow most closely.
What financial statements does a startup actually need?
The three core statements are the profit and loss account, which shows performance over a period; the balance sheet, which shows what the business owns and owes at a point in time; and the cash flow statement, which shows money moving in and out. Together they give you a complete picture, and good accounting software will produce all three.
How much working capital should a startup hold?
Enough to fund day-to-day operations while you wait to be paid, to bridge the gap between paying suppliers and selling, and to absorb unexpected costs. The right figure depends on how long your customers take to pay and how much stock you carry, but the safe approach is to forecast cash weekly and keep a buffer rather than running close to zero.
Do I need accounting software, or will a spreadsheet do?
For the very smallest or simplest businesses a spreadsheet can work, but for most, cloud accounting software saves time, reduces errors, and is how you meet Making Tax Digital requirements in the UK. Starting with software from day one is far easier than migrating off spreadsheets once the business has grown.
When should I hire an accountant?
Sooner than most founders think. An accountant helps you stay compliant, structure the business efficiently, and interpret your numbers, and the cost is usually small relative to the mistakes they prevent. Use software to keep clean records and an accountant to advise on what those records mean and what to do next.
References
- HMRC: Making Tax Digital and record-keeping requirements for UK businesses.
- Financial Reporting Council: UK financial reporting standards (FRS 102 and FRS 105).
- British Business Bank: small business finance and cash flow guidance.
- GOV.UK: setting up and running a limited company, including accounts and budgeting.
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Kurt Graver is the founder and CEO of SGI Consultants, a business consultancy that has helped over 2,000 entrepreneurs establish successful startups using systematic business development methodologies. An accountant with an MBA and 25 years of commerce and consultancy experience, Kurt specialises in strategic planning, market analysis, and sustainable business growth