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Debt, payables, and the accounting equation
The right side of the balance sheet shows where the money came from to acquire the assets — borrowed (liabilities) or contributed and earned (equity). Reading it answers a different question than the asset side: not 'what does the company have?' but 'who has a claim on it, and at what priority?' Bondholders get paid before stockholders. Suppliers get paid before bondholders if the company files for bankruptcy. Equity holders are last in line, with the largest upside if the business succeeds and the most exposure if it fails. The capital structure is the architecture of those claims.
The accounting equation that anchors the entire balance sheet: Assets = Liabilities + Equity. Always. Every transaction preserves the equation. Borrow $10 million? Cash (asset) up $10M, debt (liability) up $10M. Earn $5M of profit? Assets up $5M, retained earnings (equity) up $5M. The equation is so universal that breaking it usually means a math error or a fraud — auditors check this first. The right side is split between (what the company owes) and (the residual that belongs to shareholders).
is the largest line for many businesses: Apple owed about $69B at FY2024 year-end to its suppliers. are wages, taxes, and bills incurred but not yet paid. is the portion of borrowings due within twelve months. (covered in the revenue-quality lesson) is customer prepayments. The current-liabilities section, compared to the current-assets section, gives you the working capital position — the topic of the next lesson.
is the headline non-current liability: bonds and term loans not due within twelve months. Apple's long-term debt at FY2024 was about $86B; total debt (including current portion) was around $107B. are the present value of future lease payments, on the balance sheet since ASC 842 (2019). are the liability for promised retirement benefits, often material for airlines and industrial companies. Long-term debt and lease obligations require fixed cash payments (interest, principal, lease rent) regardless of business performance — this is what makes leverage dangerous in downturns.
Shareholders' equity has three core components. is what the company has raised from selling shares. is cumulative net income minus cumulative dividends — the running tally of profits reinvested. is shares the company has bought back, recorded as a negative line that reduces equity. Apple's retained earnings have flowed into massive buybacks over the past decade, with treasury stock often exceeding the original paid-in capital. The result is small or negative book equity even though the underlying business is enormously profitable. Book equity is an accounting construct, not an economic one — and Apple is the case study for why book value is a poor proxy for intrinsic value when buybacks are aggressive.
Apple's capital structure as of FY2024 year-end illustrates the pattern of a mature, cash-rich, buyback-aggressive company. Total debt ~$107B (mostly long-term bonds, opportunistically issued at low rates pre-2022). Total equity ~$57B (driven down by ~$650B+ of cumulative buybacks recorded as treasury stock). Cash and short-term investments ~$65B — meaning net debt is ~$42B, modest relative to the ~$118B operating cash flow generated annually. Apple uses debt as a tax-efficient capital tool, not because it needs the cash. Many of the bonds were issued at rates below 2%, locking in cheap capital that funded buybacks. The combination — small net debt, massive operating cash flow, aggressive buybacks — is the textbook of how a mature, cash-rich franchise manages capital. Source: Apple FY2024 10-K.
The Financial Statements tab shows the full liabilities and equity sections with 10-year history. The Ratios tab computes debt-to-equity, debt-to-EBITDA, and interest coverage automatically and flags companies whose leverage is unusual relative to peers. The KPIs tab graphs the trajectory of debt and equity over time, useful for spotting buyback-driven equity reductions or debt buildups. The Filings tab links to debt-section disclosures in the 10-K (debt maturity schedule, lease obligations, pension assumptions) — the source detail beneath the headline numbers.
Three traps. First: lease obligations were once off the balance sheet. ASC 842 (effective 2019) put them on, but the standard's transition still leaves complexity in older filings — and the present-value calculation depends on assumed discount rates that affect the carrying amount. Second: pension obligations. The reported liability depends on the discount rate management chose; using a lower discount rate makes the liability look bigger. Industrials and airlines often have multi-billion-dollar pension liabilities understated by aggressive discount-rate assumptions. Third: contingent obligations and guarantees disclosed only in footnotes — pending litigation, environmental remediation, performance guarantees on multi-year contracts. Most large companies have hundreds of millions of these. Read the footnotes labelled 'Commitments and Contingencies' in every 10-K. The headline debt number is necessary but not sufficient.
When leverage works, it magnifies your gains. Your spouse thinks you're clever, and your neighbors get envious. But leverage is addictive. Once having profited from its wonders, very few people retreat to more conservative practices. And as we all learned in third grade — and some relearned in 2008 — any series of positive numbers, however impressive the numbers may be, evaporates when multiplied by a single zero.