What Is Business Finance?
Business finance is the practice of understanding how money actually moves through a company — what comes in, what goes out, what’s left over, and whether the business can sustain itself long enough to reach its next milestone. It differs from personal finance in one crucial way: a business’s financial health depends on the relationship between multiple moving numbers — revenue, costs, cash, capital, debt, equity, investment, risk, and growth — not any single figure viewed in isolation.
This is why several counterintuitive things are all simultaneously true in business finance: a company can have high revenue but low profit, if its costs scale just as fast. It can have solid accounting profit but weak cash flow, if that profit is trapped in unpaid customer invoices. It can grow rapidly and still run out of cash, if growth requires spending faster than it generates returns. It can raise significant funding and still fail, if the underlying business model doesn’t work. And it can be profitable on paper while having genuinely poor unit economics, if each individual customer costs more to acquire and serve than they’re worth.
The rest of this guide walks through how these numbers actually connect — revenue, margins, operating costs, profitability, cash flow, working capital, burn, runway, and unit economics — because understanding any one of them in isolation gives a dangerously incomplete picture of a business’s real financial health.
Revenue: The Starting Point, Not the Finish Line
Revenue is money earned from selling a product or service, but the specific terminology varies by context. Sales is often used interchangeably with revenue in casual conversation. Bookings refers to signed commitments that haven’t necessarily been delivered or paid yet. Billings refers to what’s actually been invoiced. Recognized revenue refers to what accounting rules allow a company to formally count as revenue in a given period — which, for a subscription paid annually upfront, might be spread across twelve months rather than recognized all at once. These distinctions matter because casual use of “revenue” can obscure real differences in what’s actually been earned versus promised versus collected.
Revenue also comes in different shapes: one-time revenue (a single transaction), recurring revenue (predictable, repeating payments), subscription revenue (a specific recurring model), usage-based revenue (tied to actual consumption), service revenue, and product revenue. Recurring revenue is particularly valuable for subscription businesses because it creates predictability — but that doesn’t make it automatically superior for every business model. A usage-based pricing model can align better with customer value in some markets, and a strong one-time-purchase business can be perfectly healthy without any recurring component at all.
Revenue Growth
Revenue growth rate measures the pace of change, typically month-over-month, quarter-over-quarter, or year-over-year. If Month 1 revenue is $50,000 and Month 2 is $60,000, the month-over-month growth rate is ($60,000 − $50,000) ÷ $50,000 = 20%.
Revenue growth alone is insufficient as a health signal. A company can grow revenue while margins decline (each new dollar of revenue costs more to generate than the last), CAC increases (each new customer costs more to acquire), churn increases (customers leave faster even as new ones join), cash flow deteriorates, and losses grow larger in absolute terms. Growth is a directionally positive sign, but it answers only one narrow question — is the top line getting bigger — and says nothing about whether that growth is efficient, sustainable, or actually improving the underlying business.
Gross Profit and Gross Margin
Gross profit is revenue minus the direct cost of delivering the product or service (cost of revenue, sometimes called COGS). Gross margin expresses that as a percentage of revenue.
Gross Profit = Revenue − Cost of Revenue Gross Margin = (Gross Profit ÷ Revenue) × 100
Example: Revenue = $1,000,000, Cost of revenue = $400,000. Gross profit = $600,000. Gross margin = $600,000 ÷ $1,000,000 × 100 = 60%.
Gross margin matters because it sets the ceiling for how much a business can spend on everything else — marketing, sales, product, salaries — while still having a path to profitability. It affects pricing decisions (can the business absorb a discount and still be healthy), scaling decisions (does growth get cheaper or more expensive per unit), hiring capacity, and marketing budget. There is no single “ideal” gross margin across industries — a software company at 40% gross margin might be underperforming its peers, while a hardware or logistics business at 40% might be performing exceptionally well; the right benchmark depends entirely on the specific business model.
Operating Expenses
Operating expenses cover everything required to run the business beyond direct cost of revenue: payroll, marketing, sales, software, rent, legal, accounting, insurance, general administrative costs, and research and development.
| Cost Type | Behavior | Examples |
|---|---|---|
| Fixed costs | Stay roughly constant regardless of revenue or volume | Rent, base salaries, core software subscriptions |
| Variable costs | Scale directly with revenue or activity | Sales commissions, payment processing fees, cloud costs tied to usage |
Understanding which expenses are fixed and which are variable directly shapes financial planning: fixed costs create a spending floor that persists even during a slow month, while variable costs scale proportionally, meaning they’re less risky to take on but also don’t shrink automatically to protect margin if growth slows. A founder who doesn’t distinguish between the two risks either overcommitting to fixed obligations the business can’t sustain, or misjudging how much of a given cost increase will actually shrink as growth does.
EBITDA, Net Profit, and Why Neither Is Cash Flow
EBITDA stands for Earnings Before Interest, Taxes, Depreciation, and Amortization — a way of measuring operating performance with financing decisions (interest), tax jurisdiction differences (taxes), and non-cash accounting charges (depreciation and amortization) stripped out, to make operating performance more comparable across companies with different capital structures.
EBITDA is genuinely useful for isolating how the core operating business performs, but it has real limitations: it is not cash flow, it ignores capital expenditures entirely, it ignores changes in working capital, and it excludes interest and tax obligations that are real cash costs of running the business. A company can show strong EBITDA while its actual cash generation is weak or negative — treating EBITDA as “real profit” is one of the more common and costly misreadings in business finance.
Net profit (or net income) goes further than EBITDA, subtracting interest, taxes, depreciation, and amortization from operating profit to arrive at what’s genuinely left over. It matters because it reflects the full economic reality of running the business, including its financing costs. But net profit and cash flow are still not identical — a company can report positive net profit while experiencing real cash shortages, for reasons explored in the next section.
| Metric | What It Measures | What It Excludes |
|---|---|---|
| Revenue | Total sales | All costs |
| Gross profit | Revenue minus direct cost of delivery | Operating expenses, financing, taxes |
| EBITDA | Operating performance before financing and non-cash charges | Interest, taxes, depreciation, amortization |
| Operating profit (EBIT) | Operating performance including depreciation/amortization | Interest, taxes |
| Net profit | The full bottom line after every cost | Nothing — it’s the final figure |
| Cash flow | Actual cash generated or consumed | Nothing — but it’s a fundamentally different question than accounting profit |
Cash Flow: The Metric That Can Keep a Business Alive
Cash flow tracks the actual movement of cash, split into three categories: operating cash flow (cash generated or used by core business operations), investing cash flow (cash spent on or received from long-term investments like equipment), and financing cash flow (cash from or to investors and lenders — funding raised, debt repaid, etc.).
A business can show solid accounting profit and still face a real cash shortage. Common reasons: accounts receivable growing (customers owe money but haven’t paid yet), inventory tying up cash before it’s sold, prepaid expenses consuming cash upfront for benefits realized later, debt repayment (principal payments don’t appear on the income statement at all, only interest does), capital expenditures (real cash spent immediately on equipment, even though its accounting cost is spread out as depreciation over years), and general payment timing mismatches between when the business pays its own bills and when its customers pay theirs.
A fictional example: a consulting firm closes a strong quarter on paper, with solid net profit. But three major clients are 60 days late on invoices, a new hire required an upfront recruiter fee, and a quarterly software renewal hit all at once. Despite genuinely strong reported profit, the firm faces a real, uncomfortable cash squeeze — a pattern that surprises founders who track profit closely but haven’t built equal discipline around cash timing.
Working Capital
Working capital, in practice, centers on the relationship between accounts receivable (money owed to the business), inventory (goods paid for but not yet sold), and accounts payable (money the business owes others). Operating working capital reflects how much cash is tied up in the day-to-day cycle of the business.
Consider a fictional e-commerce company scaling quickly: as sales increase, so does the inventory needed to fulfill growing demand, and if the company offers trade credit to larger customers, receivables grow too. Cash gets tied up in both simultaneously, meaning the business needs more working capital precisely because it’s succeeding — fast growth, counterintuitively, can create real financial pressure rather than relieving it, since the cash needed to fund the next round of inventory or receivables often arrives well before the cash from the current round of sales does.
Burn Rate and Runway
Gross burn is total monthly operating expenses. Net burn is gross burn minus monthly revenue — the actual monthly reduction in cash. Example: monthly expenses = $100,000, monthly revenue = $60,000. Net burn = $100,000 − $60,000 = $40,000/month.
Runway is how many months of cash remain at the current burn rate: Runway = Available Cash ÷ Monthly Net Burn. With $1.2 million in cash and $100,000 monthly net burn, runway is approximately 12 months.
| Concept | Formula | What It Tells You |
|---|---|---|
| Gross burn | Total monthly operating expenses | Total spending scale |
| Net burn | Gross burn − monthly revenue | Actual monthly cash reduction |
| Runway | Available cash ÷ monthly net burn | Months remaining at current burn |
This simple runway formula has real limitations once burn changes over time — variable spending, seasonality, planned hiring, revenue growth, upcoming fundraising, and unexpected expenses can all shift net burn meaningfully from one month to the next, meaning a runway figure calculated once and never revisited can mislead a founder about how much real time is actually left.
A practical scenario: a startup has 9 months of runway and management is considering hiring 5 new employees. That hiring decision directly increases burn, which directly shortens runway — potentially from 9 months to 5 or 6, depending on salary levels — which directly increases the urgency and risk around the next fundraise. This is where scenario planning matters: modeling runway under the current plan, under an accelerated hiring plan, and under a slower, more conservative plan, before committing to any of them. Founders should not assume burn should always be minimized — spending that creates measurable growth, capability, or competitive advantage can be entirely rational — but every spending decision should be evaluated with a clear view of its effect on runway, not made in isolation from it.
Unit Economics: CAC, LTV, and Payback
Unit economics asks two connected questions at the level of a single customer: what does it cost to acquire one customer, and how much economic value does that customer generate in return?
Customer Acquisition Cost (CAC)
CAC = Sales and Marketing Costs ÷ New Customers Acquired.
If a company spends $50,000 on sales and marketing in a month and acquires 100 new customers, CAC = $500. What counts as “sales and marketing costs” varies by methodology: blended CAC includes all customers regardless of channel, paid CAC isolates only paid acquisition channels, and fully loaded CAC includes salaries, tools, and overhead beyond just ad spend. Comparing CAC across different time periods or teams requires using a consistent definition — mixing blended and fully loaded figures produces a misleading comparison.
Customer Lifetime Value (LTV)
LTV estimates the total economic value a customer generates over their relationship with the business, typically informed by average revenue, gross margin, and expected retention or churn. There is no single universally correct LTV formula — different methodologies weight these inputs differently, and LTV is fundamentally an estimate built on assumptions, not a precise, observed figure. A simplified approach: if a customer generates $100/month in revenue at 70% gross margin, and the average customer relationship lasts 24 months, a rough LTV estimate might be $100 × 0.70 × 24 = $1,680 — but changing the retention assumption meaningfully changes this number, which is exactly why LTV should always be treated as directional, not exact.
LTV:CAC Ratio
If CAC is $500 and estimated LTV is $1,500, the ratio is 3:1. This ratio can be a useful directional signal — a very low ratio suggests acquisition may be too expensive relative to the value generated. But it can also mislead: early-stage data is often too thin to produce a reliable LTV estimate, different customer cohorts can have very different economics hidden inside one blended average, gross versus net revenue assumptions change the math significantly, and a simple ratio ignores support costs, payback period, and whether the business actually has the cash to survive long enough to realize that lifetime value. 3:1 is a commonly cited reference point, not a universal rule every business must hit — the right target depends heavily on the specific business model, margin structure, and cash position.
CAC Payback Period
This measures how long it takes for the gross profit generated by a customer to recover their acquisition cost. If a customer generates $50/month in gross profit and CAC is $500, payback period is 10 months. This connects directly to burn rate and runway — a business with a long payback period needs more cash on hand to fund the gap between acquiring a customer and recovering that cost, which directly affects how aggressively it can pursue growth without needing to raise additional funding sooner than planned.
| Metric | What It Tells You | Key Limitation |
|---|---|---|
| CAC | Cost to acquire one customer | Definition varies (blended vs. fully loaded) |
| LTV | Estimated value generated per customer | Built on assumptions, not an exact figure |
| LTV:CAC | Rough efficiency of acquisition spend | Can mask cohort differences and ignore cash timing |
| Payback period | Time to recover CAC from gross profit | Doesn’t capture ongoing support costs directly |
Churn and Retention
Customer churn measures the rate customers stop using or paying for a product. Revenue churn measures the resulting loss in revenue, which can differ from customer churn if departing customers were smaller or larger than average. Customer retention is the inverse — how many customers stay. Net revenue retention (NRR) measures revenue change among existing customers including expansion, sometimes exceeding 100% if upsells outpace churn. Gross revenue retention (GRR) measures the same thing excluding any expansion, capturing pure retention.
Acquisition without retention creates an inefficient growth engine: a fictional SaaS company acquiring 100 new customers a month while losing 90 existing ones is barely growing net, despite genuinely significant acquisition spend and activity — all of that CAC investment is being spent just to tread water, rather than compounding into real growth.
Break-Even Analysis
Fixed costs stay constant; variable costs scale with volume; contribution margin is revenue minus variable cost per unit — what’s left to cover fixed costs and, eventually, generate profit. Break-even revenue is the point where total contribution margin exactly covers fixed costs.
Example: fixed costs = $50,000/month, contribution margin per customer = $50/month. Break-even = $50,000 ÷ $50 = 1,000 customers. This kind of analysis helps answer concrete operating questions: how many customers are needed to cover costs, how much revenue is required to become profitable, when profitability is realistically achievable given current growth trends, whether a new hire is affordable, and whether a planned expansion is financially supportable given current contribution margins.
Pricing and Business Finance
Pricing is fundamentally a financial decision, not just a positioning one. It should weigh cost structure, perceived customer value, competitive context, gross margin impact, customer willingness to pay, its effect on CAC economics (a higher price can justify a higher acquisition cost), retention dynamics, and contribution margin.
A company can grow sales meaningfully by lowering prices while simultaneously weakening its financial model — lower prices can widen the top of the funnel while shrinking gross margin, extending CAC payback periods, and reducing the cash available to fund the next round of growth. Discounting isn’t inherently wrong, but it should be a deliberate financial decision with its downstream effects modeled, not a reflexive response to a slow sales month.
Financial Forecasting and Building a Basic Model
A budget sets planned spending; a forecast projects expected results going forward; a financial model connects assumptions (revenue, costs, headcount) into projected outcomes; scenario planning builds multiple versions — typically a base case, an upside case, and a downside case — to understand a range of plausible futures rather than a single, falsely precise number.
A simple startup financial model connects: revenue assumptions (how many customers, at what price) → customer assumptions (growth rate, churn) → COGS → gross profit → operating expenses (including planned headcount) → resulting burn → cash balance over time → runway → funding needs. None of these components should be modeled in isolation — a headcount assumption directly changes burn, which directly changes runway, which directly changes when and how much funding is needed. Forecasts are never perfectly accurate, and shouldn’t be presented as if they are; their value comes from making assumptions explicit and testable, not from precision.
Funding: Debt vs Equity
| Option | How It Works | Key Trade-off |
|---|---|---|
| Bootstrapping | Funded by revenue and founder capital | Full control, but limited by available cash |
| Debt | Borrowed capital, repaid with interest | No dilution, but requires repayment regardless of performance |
| Equity financing | Capital raised in exchange for ownership | No repayment obligation, but meaningful dilution and shared control |
| Venture capital | A specific form of equity financing focused on high-growth potential | Significant capital and expertise, but growth expectations and board involvement |
| Angel investment | Early-stage equity, typically from individuals | Often more flexible terms, but smaller check sizes |
| Revenue-based financing | Repayment tied to a percentage of revenue | No fixed dilution, but repayment scales with revenue, which can strain cash during slow periods |
None of these is universally best — the right choice depends on growth ambitions, capital intensity, control preferences, and risk tolerance. A capital-light service business might never need outside funding at all; a capital-intensive hardware startup may have little realistic choice but to raise substantial equity. This connects directly to the mechanics of raising a first major round, covered in depth in what Series A funding actually involves for a growing startup.
What Investors Look at Financially
Common investor questions include: is revenue genuinely growing, are customers staying (retention), are margins healthy for the business model, is CAC sustainable relative to LTV, is the business capital efficient, how much additional cash is required to reach the next milestone, and how large can the ultimate opportunity realistically become. These criteria vary meaningfully by company stage and sector — an early-stage company is evaluated far more on trajectory and team than a growth-stage company, which is evaluated more on demonstrated, repeatable unit economics — so there’s no single universal investor checklist that applies identically across every situation.
Capital Efficiency
Capital efficiency asks how much capital was required to generate a given amount of growth or revenue. Two companies with identical current revenue can have very different financial quality if one reached that figure having raised and spent a fraction of what the other required — the more capital-efficient company has demonstrated it can generate growth without needing proportionally more outside funding, which materially affects both its risk profile and its negotiating position in future fundraising.
Financial Metrics by Business Model
Different business models track meaningfully different core metrics, because the underlying economic engine differs.
| Business Model | Core Metrics |
|---|---|
| SaaS | MRR, ARR, churn, NRR, CAC, LTV, gross margin, CAC payback, burn, runway |
| E-commerce | Average order value, gross margin, contribution margin, CAC, repeat purchase rate, return/refund rate, inventory turnover, working capital |
| Service businesses (agencies, consultants) | Billable hours, utilization rate, revenue per employee, gross margin, client concentration, accounts receivable, project profitability, retainer revenue |
For SaaS specifically: MRR (monthly recurring revenue) and ARR (annual recurring revenue) track the predictable revenue base, while churn, NRR, CAC, LTV, gross margin, CAC payback, burn, and runway round out the picture. The commonly referenced “Rule of 40” concept — the idea that growth rate plus profit margin should roughly sum to 40% or more — is a useful heuristic for balancing growth against profitability, not a universal law every SaaS company must satisfy, and it’s most meaningful at a certain scale and maturity rather than in a company’s earliest months.
For e-commerce, working capital tied up in inventory and the relationship between average order value and CAC tend to dominate financial health in a way that doesn’t apply as directly to SaaS. For service businesses, revenue is fundamentally tied to people’s time, so utilization and revenue per employee become central — and client concentration risk (too much revenue from too few clients) matters more here than in most product businesses. Freelancers and agencies can apply this same discipline at a smaller scale: tracking utilization, effective hourly realization, and client concentration gives a service business the same kind of financial clarity a larger company gets from its dashboard.
Common Business Finance Mistakes
| Mistake | Why It’s a Problem |
|---|---|
| Confusing revenue with profit | Ignores whether the business actually keeps any of what it earns |
| Ignoring cash flow | Profit on paper doesn’t guarantee the ability to pay bills on time |
| Spending based on revenue growth alone | Ignores margin, churn, and cash timing behind that growth |
| Hiring too early | Increases fixed costs and burn before demand is confirmed |
| Ignoring working capital | Growth itself can create a cash squeeze if receivables and inventory aren’t planned for |
| Underpricing | Erodes margin and can weaken CAC payback and overall financial resilience |
| Ignoring CAC | Makes it impossible to judge whether acquisition spending is actually working |
| Assuming LTV is exact | Treats an estimate as a guarantee, leading to overconfident spending decisions |
| Taking on debt without understanding repayment | Creates fixed obligations that don’t flex with a bad month |
| Raising funding without a clear plan | Capital without a disciplined deployment plan often gets spent inefficiently |
| No financial forecast | Removes the ability to anticipate cash needs before they become urgent |
| No downside scenario | Leaves the business unprepared if growth or revenue underperforms expectations |
| Mixing personal and business finances | Obscures the true financial picture of the business and complicates accounting, tax, and fundraising |
The Founder Finance Dashboard
| Metric | Review Frequency |
|---|---|
| Revenue | Weekly |
| Revenue growth | Monthly |
| Gross margin | Monthly |
| Operating expenses | Monthly |
| EBITDA / operating performance | Monthly |
| Net profit | Monthly/Quarterly |
| Cash balance | Weekly |
| Operating cash flow | Monthly |
| Burn rate | Weekly/Monthly |
| Runway | Monthly |
| CAC | Monthly |
| LTV | Quarterly |
| Churn | Monthly |
| Retention | Monthly |
| Accounts receivable | Weekly/Monthly |
| Working capital | Monthly |
Not every metric warrants weekly attention — cash balance and revenue benefit from frequent visibility since they can shift quickly and matter urgently, while LTV and broader unit economics trends are more meaningful reviewed quarterly, since they’re inherently noisier over shorter windows and don’t typically require immediate reaction.
Practical Case Study: Northstar SaaS
This is a hypothetical example created for educational purposes, not a real company or industry benchmark.
Northstar SaaS has 1,000 customers at an average monthly revenue of $100 per customer, giving MRR = $100,000. Monthly costs: COGS = $25,000, sales and marketing = $60,000, product and engineering = $50,000, G&A = $25,000. Cash balance = $900,000.
Gross profit = $100,000 − $25,000 = $75,000. Gross margin = 75%. Total operating expenses (S&M + product/engineering + G&A) = $60,000 + $50,000 + $25,000 = $135,000. Approximate operating loss = $75,000 gross profit − $135,000 operating expenses = −$60,000/month. Since there’s no material revenue outside the $100,000 MRR already counted, net burn ≈ $60,000/month. Runway = $900,000 ÷ $60,000 ≈ 15 months.
If Northstar spends roughly $30,000 of its $60,000 sales and marketing budget on acquiring new customers, and typically adds 50 new customers a month from that spend, implied blended CAC ≈ $600. If those customers churn at roughly 3% monthly (implying an average customer lifetime of about 33 months) at 75% gross margin, a rough LTV estimate would be $100 × 0.75 × 33 ≈ $2,475, giving an LTV:CAC ratio of roughly 4:1 — a reasonable, though assumption-dependent, figure worth stress-testing against more conservative churn assumptions before treating it as confirmed. For break-even, Northstar would need enough additional MRR to cover the current $60,000 gap at 75% gross margin — roughly $80,000 in additional monthly revenue, or around 800 more customers at current pricing, all else held equal. None of these figures should be read as typical for any real SaaS company — they exist purely to illustrate how the underlying formulas connect in practice.
How a Founder Should Think About Money
Before any significant spending decision, a useful set of questions: what specific problem does this expense solve? Does it increase revenue? Does it reduce a real risk? Does it improve efficiency? Is it necessary now, or could it reasonably wait? What’s the expected return, even roughly estimated? What happens if it doesn’t work out? Can the company genuinely afford that downside? And critically — how does this specific expense affect runway?
Not every valuable investment produces an immediate, measurable ROI — a founder who only funds initiatives with clear, short-term payback can under-invest in things like brand, culture, or foundational infrastructure that pay off over a longer horizon. The discipline isn’t demanding measurable ROI for everything; it’s making every spending decision deliberately, with a clear view of its cost and its effect on the company’s cash position, rather than spending reflexively because revenue happens to be growing.
Growth vs Profitability
Growth, profitability, cash preservation, and market expansion frequently pull in different directions, and different businesses can rationally choose different balances among them. High growth is not automatically good — growth achieved by burning cash faster than the business can raise or generate it is a real risk, not an unambiguous positive. Profitability is not automatically the only correct goal either — a company that optimizes too early for profitability in a market where speed and market share genuinely matter can lose a winnable opportunity to a faster-moving, better-capitalized competitor.
The correct strategy depends on the business model (capital-light versus capital-intensive), the market (winner-take-most dynamics versus a more fragmented, durable market), capital availability, the competitive environment, the founders’ own risk tolerance, and the genuine size of the growth opportunity in front of the business. There’s no universal answer — only a deliberate, context-specific trade-off that should be revisited as circumstances change.
A 90-Day Business Finance Improvement Plan
| Phase | Focus |
|---|---|
| Days 1–30 | Understand the numbers — track revenue and expenses accurately, separate fixed from variable costs, build basic cash-flow visibility |
| Days 31–60 | Analyze the economics — calculate real gross margin, CAC, retention, working capital needs, and break-even point |
| Days 61–90 | Build planning systems — a working forecast, scenario analysis (base/upside/downside), a real budget, cash runway tracking, and a deliberate capital allocation process |
A Business Does Not Run on Revenue — It Runs on Economics and Cash
Revenue tells you how much you sell. Gross margin tells you what remains after direct costs of delivery. Operating expenses tell you what it actually costs to run the company day to day. Profit tells you whether the accounting economics genuinely work. Cash flow tells you whether the business can actually fund its own operations in real time. Burn tells you how quickly cash is being consumed. Runway tells you how much time remains before that becomes urgent. Unit economics tells you whether growth, at the level of a single customer, actually makes economic sense. Capital allocation determines where the business’s limited resources go next.
The goal was never to maximize any single one of these numbers in isolation. The goal is building a business whose full financial picture — revenue, margins, cash, and unit economics together — can genuinely support sustainable growth, not just an impressive-looking metric on one particular slide.
Frequently Asked Questions
What is business finance? The practice of understanding and managing how money moves through a business — revenue, costs, cash, capital, and risk — and how these elements connect to determine the company’s actual financial health.
Why is cash flow important for a business? Because a business can show accounting profit and still be unable to pay its bills if that profit is tied up in unpaid invoices, inventory, or other working capital — cash flow reflects the business’s real, immediate ability to fund itself.
What is the difference between revenue and profit? Revenue is total money earned from sales before any costs are subtracted; profit is what remains after subtracting some or all of the business’s costs, depending on which profit measure (gross, operating, or net) is being used.
What is EBITDA? Earnings before interest, taxes, depreciation, and amortization — a measure of operating performance that strips out financing and certain non-cash accounting effects, useful for comparison but not equivalent to cash flow or true profit.
What is burn rate? The rate at which a company spends its cash reserves, most commonly measured as net burn — total expenses minus revenue — over a given month.
What is startup runway? The number of months a company can continue operating at its current net burn rate before running out of cash, calculated as available cash divided by monthly net burn.
What is unit economics? The analysis of the cost and value associated with a single customer — primarily what it costs to acquire them (CAC) versus the value they generate over their relationship with the business (LTV).
What is CAC? Customer Acquisition Cost — the average cost of acquiring one new customer, typically calculated as sales and marketing spend divided by new customers acquired in a given period.
What is LTV? Customer Lifetime Value — an estimate of the total economic value a customer generates over their relationship with the business, built on assumptions about revenue, margin, and retention rather than an exact, guaranteed figure.
What is the LTV:CAC ratio? A rough measure of acquisition efficiency comparing estimated customer value to acquisition cost — useful directionally, but not a universal rule, since it depends heavily on the underlying assumptions and ignores factors like payback timing and support costs.
How do startups calculate break-even? By dividing fixed costs by contribution margin per customer or unit, revealing how many customers or how much revenue is needed to cover fixed costs entirely.
What financial metrics should founders track? At minimum: revenue, gross margin, burn rate, runway, cash balance, CAC, and retention — reviewed at a cadence appropriate to how quickly each one can meaningfully change.
Financial Disclaimer
This article is for general educational and informational purposes only. It does not constitute personalized financial, investment, tax, accounting, legal, or business advice. Businesses should evaluate their own circumstances and consult qualified professionals where appropriate.
