The income statement tells you what the business earned. The balance sheet tells you what the business is built on: the assets it owns, the obligations it carries, and whether the foundation underneath those earnings is as solid as the reported numbers suggest.
In Part 1, we started with the cash flow statement — the document that tells you whether the earnings are real, not just recorded. In Part 2, we worked through the income statement, tracing the path from revenue to operating income and understanding why EBIT matters more to an investor than the bottom-line net income figure.
Those two statements tell you what happened during a period of time: how much came in, how much went out, what was earned.
The balance sheet is different. It’s a photograph, not a video. It shows you the business on one specific day — typically the last day of the fiscal quarter or year — and records everything it owns and everything it owes at that moment. Think of it as a status report on the foundation the business is built on.
That foundation matters more than most new investors realize. A business can be growing revenue every year, reporting healthy profits, and still be sitting on a structure that makes it fragile — too much debt, too little working capital, assets that are worth far less than their stated value. The balance sheet is where those vulnerabilities show up.
The Accounting Equation
Before reading any specific balance sheet, you need to know the fundamental rule that every balance sheet must satisfy:
Assets = Liabilities + Shareholders’ Equity
This equation always holds. It cannot be violated.
Here’s what each term means in plain language:
Assets are everything the business owns or controls that has economic value — cash in the bank, inventory on the shelves, equipment on the factory floor, ownership stakes in other companies, the value of brand names the business has acquired.
Liabilities are everything the business owes to someone else — loans from banks, amounts owed to suppliers, future lease payments, deferred revenue from customers who paid for services not yet delivered.
Shareholders’ equity — also called book value — is what’s left after you subtract the liabilities from the assets. It represents the net value of the business that belongs to owners (shareholders) after all obligations are settled.
If a company has $10 million in assets and $6 million in liabilities, shareholders’ equity is $4 million. That’s the owners’ share of the business, on paper.
Every number on the balance sheet connects back to this equation. When a company borrows money, both assets (cash) and liabilities (debt) increase by the same amount — the equation stays balanced. When it earns a profit and keeps the money in the business (rather than paying it as a dividend), assets increase and so does equity. The equation always balances, by construction.
Assets: What the Business Owns
Assets are divided into two broad categories based on how quickly they can be converted to cash.
Current assets are assets expected to be used or converted to cash within one year. The main ones:
- Cash and equivalents — the most liquid asset; money sitting in bank accounts or in very short-term investments like Treasury bills. This is the first number to check.
- Accounts receivable — money owed to the company by customers who have been billed but haven’t paid yet. High accounts receivable relative to revenue can mean customers are slow to pay — or that the company is recognizing revenue before it has actually collected it.
- Inventory — the value of goods the company holds for sale. For a retailer, it’s the merchandise on the shelves. For a manufacturer, it includes raw materials and work-in-progress. Inventory that’s growing faster than sales is often a warning sign — it may mean products aren’t moving.
Non-current assets (also called long-term assets) are assets the business holds and uses over multiple years:
- Property, plant, and equipment (PP&E) — the physical machinery, buildings, vehicles, and equipment the business uses to operate. This is usually the largest line item on the balance sheet for capital-intensive businesses. It’s reported at historical cost — what the company originally paid — minus accumulated depreciation. If a company bought a machine for $10 million and has been depreciating it for five years, the balance sheet might show it at $5 million even if it would cost $15 million to replace today.
- Intangible assets — things like patents, trademarks, software, and customer relationships. These have real value but no physical form.
- Goodwill — a special intangible that appears when one company acquires another at a price above the fair value of its identifiable assets. Goodwill represents the premium paid — often for brand strength, customer loyalty, or synergies the acquirer expects to realize. Goodwill doesn’t get amortized (unlike most other intangibles), but it can be written down if the acquisition doesn’t pan out. A large goodwill balance that has been sitting unchanged for many years without any impairment test is worth examining skeptically.
Liabilities: What the Business Owes
Liabilities are also divided into current and non-current.
Current liabilities are obligations due within the next year:
- Accounts payable — amounts the company owes its suppliers for goods or services already received. This is essentially free, short-term financing. A company with strong bargaining power (like a large retailer) can negotiate to pay suppliers slowly, improving its own cash position.
- Short-term debt — loans or portions of long-term loans due within the year. A high short-term debt balance is a flag worth watching — it means the company needs to refinance or repay that amount soon, which could be stressful if credit markets tighten.
- Deferred revenue — cash collected from customers for services not yet delivered. A software company that sells annual subscriptions collects cash upfront but has to deliver the service over the year. That obligation sits here as a liability until the service is provided.
- Accrued liabilities — expenses the company has incurred but not yet paid (salaries owed to employees, taxes owed to governments, etc.).
Non-current liabilities are obligations due in more than one year:
- Long-term debt — bonds issued to investors, bank loans with multi-year repayment schedules. This is the main source of financial leverage — using borrowed money to amplify returns (and risks).
- Deferred tax liabilities — taxes owed to the government in the future, arising because the company’s accounting for tax purposes differs from its accounting for financial reporting purposes.
Working Capital — The Buffer
Working capital is current assets minus current liabilities:
Working Capital = Current Assets − Current Liabilities
Positive working capital means the business has enough short-term assets to cover its short-term obligations. A company with $5 million in current assets and $3 million in current liabilities has $2 million of working capital — a cushion.
Negative working capital can be a problem or a sign of strength, depending on the business. Most companies with negative working capital are struggling to manage their short-term obligations. But some businesses — like large retailers and certain subscription companies — run negative working capital by design: they collect cash from customers before they have to pay their suppliers. Amazon and Walmart are famous examples. They hold large accounts payable (money owed to suppliers) and relatively modest accounts receivable (because customers pay immediately). For those businesses, negative working capital is a feature, not a bug.
The more practical thing to watch is the trend in working capital. A company whose working capital is shrinking quarter by quarter might be collecting receivables more slowly, or building up inventory it can’t sell, or paying suppliers faster than it’s collecting from customers. Any of those trends deserves a closer look.
Debt Structure: How Much, and When?
Two numbers matter when you’re evaluating a company’s debt load: how much debt there is, and when it’s due.
Debt/equity ratio — total debt divided by total shareholders’ equity — gives you a sense of how levered (borrowed-up) the company is. A ratio of 0.5 means the company has borrowed $0.50 for every $1.00 of owner equity. A ratio above 2.0 or 3.0 means the business is heavily dependent on debt to fund its assets.
High leverage is not automatically bad. Some industries — utilities, real estate, banking — operate with high debt ratios as a matter of course, because their cash flows are predictable and they can sustain the interest payments. For a cyclical business whose revenues swing with the economy, high debt is far more dangerous.
Debt maturity schedule — when the debt comes due — matters just as much as the total. A company with $500 million in long-term debt due in 2032 has plenty of time to manage that obligation. A company with $500 million due in 2027 needs to either refinance it or generate enough cash to repay it within a few years. In a rising interest rate environment, refinancing can be expensive. The notes to the financial statements (more on that in Part 4) will tell you exactly when each piece of debt matures.
Book Value of Equity — and Why It Often Lies
Shareholders’ equity on the balance sheet is calculated at historical cost, following accounting rules. The result — book value per share (total equity divided by shares outstanding) — is frequently cited as a valuation anchor. It shouldn’t be.
Here’s why. Assets on the balance sheet are recorded at what the company originally paid for them, not what they’re worth today.
A company that bought a building thirty years ago in Manhattan carries it at its 1995 price minus accumulated depreciation — which might be $2 million on paper. That same building might be worth $20 million today. The balance sheet shows none of that appreciation.
The reverse is equally true. PP&E that’s been depreciated to near zero may still be running fine. Goodwill from a failed acquisition may be carried at cost even though the acquired business has lost most of its value (and may eventually be written down in a future impairment charge — but that will come years after the economic damage occurred).
Book value is most reliable as a valuation tool in industries where the assets on the balance sheet closely approximate their real economic value — primarily banking and insurance, where the assets are mostly financial instruments that get regularly repriced to reflect what they’re actually worth today. For most other businesses, especially service companies and technology companies with large intangible assets or brand value, book value is a starting point at best and a distraction at worst.
What matters to an investor is economic value — what the business is actually worth based on the cash it can generate. The DCF model in the Intrinsic Value series estimates that directly, without anchoring on book value. The balance sheet feeds into that model primarily through the book value of equity and debt (used to calculate invested capital in Step 7) and through working capital (used to measure the reinvestment the business needs to support its growth).
The Capex Question: Maintenance vs. Growth
Here is a connection between the balance sheet and the valuation model that most introductory treatments skip over — and that turns out to matter quite a bit.
When a company spends money on capital expenditures — capex, which is money spent on physical assets like machinery, buildings, and equipment — not all of that spending is doing the same thing.
Maintenance capex is the spending required just to keep the business running at its current size. It replaces worn-out equipment. It prevents the existing asset base from deteriorating. Without maintenance capex, the business slowly stops working.
Growth capex is the spending that expands the business — new factories, new equipment for new product lines, new stores, new capacity. This is investment, not maintenance.
The income statement shows depreciation — the annual accounting charge that spreads the original cost of an asset over its useful life. At first glance, depreciation looks like a reasonable estimate of maintenance capex: the asset is wearing down by roughly that amount each year, so the depreciation charge tells you roughly what it would cost to maintain it.
The problem is that depreciation has a systematic downward bias. It’s based on the original price of the asset, not what it would cost to replace it today. Inflation erodes the dollar’s purchasing power over time. A machine that cost $1 million in 2010 and has a 20-year useful life generates a depreciation charge of $50,000 per year — but that same machine might cost $1.5 million to replace in 2026. Using the $50,000 depreciation figure understates what it would actually cost to maintain the asset.
Damodaran’s approach: Aswath Damodaran — a finance professor at NYU who is one of the most rigorous thinkers on valuation — offers a cleaner way to separate maintenance from growth capex. The idea starts with an equation:
Reinvestment Rate = Growth Rate ÷ ROIC
Reinvestment rate is the fraction of after-tax operating profit that the company puts back into the business (through capex, acquisitions, and working capital investment) rather than returning to owners. ROIC is the return on invested capital — what the business earns on each additional dollar it invests. Growth rate is how fast the business is growing its earnings.
The equation makes intuitive sense: a business that earns a high return on each new dollar invested (high ROIC) doesn’t need to reinvest as much to produce a given amount of growth. A business with a low ROIC has to pour in more investment to move the needle.
Here’s how to use it. If you observe a company growing earnings at 8% per year and earning an ROIC of 16%, the equation says it needs to reinvest 50% of its after-tax operating profit to sustain that growth rate:
Reinvestment Rate = 8% ÷ 16% = 50%
Growth capex — the portion of total capex tied to expanding the business — can be estimated as:
Growth Capex = NOPAT × (g ÷ ROIC)
where NOPAT is net operating profit after tax (operating income adjusted for taxes) and g is the growth rate.
Maintenance capex is what’s left:
Maintenance Capex ≈ Total Capex − Growth Capex
This estimate will never be perfectly precise — the formula is a model, not a measurement. The honest caveat: it’s a range, not a number. A few things that help:
- Average over three to five years. Capex spending is lumpy. A company might do a major equipment refresh every few years and spend very little in between. Averaging smooths out that noise and gives you a more representative figure.
- Consistency check. Compare your implied reinvestment to the actual reported net capex (capex minus proceeds from asset sales) plus the change in net working capital. If your model estimate and the actual number are far apart, examine the assumptions. Large divergences sometimes reveal that management is under-investing in maintenance — or that growth has been slower than the capex spending implies.
This matters for valuation because every dollar of capex the business must spend just to stand still is a dollar that cannot be returned to owners or invested in genuine growth. A business with low maintenance capex requirements is genuinely more valuable than one with high maintenance requirements, even if both report the same EBIT. The valuation model captures this through free cash flow — and getting the capex split right makes the model more accurate.
A Note to Luca and Lili
Here is something worth sitting with.
The balance sheet is the document where accounting most aggressively hides what you actually want to know.
PP&E at historical cost tells you what was paid, not what’s there. Book equity tells you what was invested, not what was built. Goodwill tells you how much a company overpaid for acquisitions, recorded permanently unless someone writes it down.
None of this is dishonest. It’s just the nature of the accounting rulebook. GAAP was designed for consistency and auditability, not for investor clarity.
Your job as an investor is to read what’s on the page and then ask: what does this actually mean for the business’s future cash flows? That requires translating the accounting language into economic reality. The balance sheet gives you raw material. The translation is yours to do.
The more you practice that translation — across different industries, different capital structures, different accounting choices — the faster it gets. Start with the working capital, then the debt maturity schedule, then ask the capex question. Those three usually tell you most of what you need to know about whether the foundation is solid.
— Papa
The One-Paragraph Summary
The balance sheet records what a business owns (assets) and owes (liabilities) at a single point in time, with the difference being shareholders’ equity — the owners’ residual claim. Current assets and current liabilities net to working capital, which tells you whether the business has a short-term cash cushion. The debt structure — how much is owed and when it’s due — determines how much financial pressure the business carries. Book value of equity, while widely cited, is unreliable as a valuation tool for most businesses because assets are recorded at historical cost, not current economic value. The most important balance sheet insight for investors is the maintenance vs. growth capex distinction: depreciation understates true maintenance costs because it’s based on historical prices, not replacement costs; Damodaran’s formula (Growth Capex = NOPAT × g ÷ ROIC) lets you estimate what portion of total capex is sustaining the business and what portion is genuinely expanding it, and averaging that estimate over three to five years smooths the noise. Getting this split right is what connects the balance sheet to the free cash flow model.
Next: Part 4 — Notes and MD&A: Where the Real Information Hides. The financial statements are a summary. The notes and management’s discussion explain the assumptions behind the numbers, the risks they don’t quantify in the main tables, and the commitments the business has made that don’t appear on the face of the statements at all.