See what the adjusted numbers are hiding.

GAAP earnings follow standardized accounting rules. Adjusted earnings are management's preferred version of reality. Companies exclude costs they claim are "non-recurring" or "non-cash" to paint a rosier picture.

The four most common adjustments are stock-based compensation, restructuring charges, amortization of intangibles, and one-time items. Management argues these don't reflect "core" operations. This logic is often flawed.

Stock-based compensation deserves special scrutiny. Companies like Salesforce routinely exclude hundreds of millions in stock compensation from adjusted earnings. But this compensation is real—shareholders get diluted when companies issue new shares to employees. The cost simply gets passed to equity holders instead of hitting the cash flow statement directly.

Salesforce reported $1.48 billion in stock-based compensation in fiscal 2024. Excluding this made their adjusted earnings per share look 40% higher than GAAP earnings. Investors who focused only on adjusted metrics missed a massive real cost.

To evaluate adjustments, ask two questions: Does this cost recur regularly? Is it truly non-cash with no economic impact? Restructuring charges that happen every year aren't one-time costs—they're part of doing business. Amortization from acquisitions reflects real economic value consumed over time.

Some adjustments make sense. True one-time legal settlements or natural disaster costs can obscure underlying trends. But when "non-recurring" items recur every quarter, or when stock compensation gets larger each year, adjusted earnings become fiction.

Always start with GAAP numbers. They're not perfect, but they follow consistent rules. Adjusted earnings are marketing materials dressed up as accounting. Trust them at your own risk.

Working capital changes reveal operational problems before management admits them. Three balance sheet signals predict earnings disappointments quarters in advance.

1. Rising DSO (Days Sales Outstanding): When customers take longer to pay, it signals pricing pressure or customer financial stress. Calculate DSO as (Accounts Receivable ÷ Quarterly Revenue) × 90 days. A jump of 5+ days warrants investigation.
2. Inventory growing faster than revenue: When inventory increases 15% but revenue grows 8%, demand is weakening. Management often explains this as "strategic buildup" or "seasonal preparation." Reality: customers aren't buying as expected.
3. Declining deferred revenue: For software and subscription businesses, falling deferred revenue means fewer advance payments from customers. This directly predicts lower future revenue recognition.

These signals appear 1-2 quarters before earnings warnings because accounting rules require companies to record transactions when they occur, not when cash changes hands. Management can delay guidance cuts, but they cannot hide balance sheet deterioration.

Tesla demonstrated this pattern in Q2 2018. DSO jumped from 18 days to 27 days while inventory surged 54% versus 43% revenue growth. The company explained high inventory as "production ramp benefits." Three months later, Tesla cut delivery guidance and missed earnings expectations.

The balance sheet told the real story: customers were financing purchases over longer periods (higher DSO) while Tesla built cars faster than it could sell them (inventory buildup). Both pointed to demand challenges before Tesla acknowledged them publicly.

Track these metrics quarterly. Calculate DSO for the trailing quarter. Compare inventory growth to revenue growth over the same period. For subscription businesses, monitor deferred revenue trends. When two of three signals flash red, expect earnings disappointment within six months.

Cash flow statements reveal what balance sheets and income statements often hide. Watch for these five warning signs that suggest accounting quality problems.

1. Operating cash flow declining while net income grows. This divergence signals potential earnings manipulation through aggressive revenue recognition or expense deferrals. When Valeant Pharmaceuticals reported growing profits in 2014-2015 while operating cash flow turned negative, investors should have questioned the sustainability of those earnings.
2. Large "other" items in operating cash flow. Companies sometimes bury problematic adjustments in catch-all categories that obscure real performance. If "other operating activities" represents more than 5% of total operating cash flow, dig deeper into the footnotes to understand what management is classifying there.
3. Capitalized software development or R&D costs. This practice converts current expenses into assets on the balance sheet, artificially boosting near-term profits. Zynga capitalized significant game development costs before its IPO, making profitability appear stronger than underlying economics suggested.
4. Receivables growing faster than revenue. When accounts receivable increase 20% but sales grow only 10%, companies may be booking questionable revenue or facing collection problems. This pattern often precedes revenue restatements or bad debt write-offs.
5. Negative free cash flow despite positive EBITDA for multiple years. Businesses that consistently burn cash while reporting profits may face capital intensity issues or working capital problems. WeWork showed this pattern for years before its failed IPO, raising questions about the business model's viability.

None of these is automatically disqualifying — but each one requires an explanation before you invest. Companies with sound operations should generate consistent cash flows that align with reported profits over time.

A 10-K filing contains 100+ pages. Most investors read it wrong. Here's the efficient approach that gets you the critical information in 30 minutes.

1. Business description (5 minutes): Start with Item 1. Skip the marketing language. Focus on three numbers: what percentage of revenue comes from the top 5 customers, which geographic regions drive growth, and how the company actually makes money. Amazon's 2023 10-K shows AWS generates 70% of operating income despite being 16% of revenue—that's the insight you need.
2. Risk factors (5 minutes): Don't read every risk. Compare this year's Item 1A to last year's filing. New risks signal management concerns. When Meta added "AI competition" as a risk factor in 2023, it preceded their $28 billion Reality Labs loss.
3. MD&A (10 minutes): Management explains revenue and margin changes here. Read skeptically. If revenue grew 20% but management spends three paragraphs explaining why margins fell, dig deeper. Look for phrases like "one-time items" or "normalizing for"—these often hide recurring problems.
4. Cash flow statement (5 minutes): Three numbers matter: operating cash flow, capital expenditures, and free cash flow (operating CF minus capex). If net income is $1 billion but operating cash flow is $200 million, ask why.
5. Revenue recognition footnote: Always check this footnote first. It explains when the company records sales. Tesla's footnote reveals they recognize full self-driving software revenue upfront, not over time—a $2 billion annual impact.

The balance sheet and income statement are summaries. The footnotes are where the accounting decisions live.

Most accounting mistakes stem from trusting management's preferred metrics over hard cash flows. Here are four costly errors that trip up even experienced investors.

1. Mistaking adjusted EBITDA for cash generation in capital-heavy businesses. Tesla reported $7.5 billion in adjusted EBITDA for 2022, but generated only $7.5 billion in operating cash flow after spending $7.2 billion on capex. Investors who assumed EBITDA represented free cash missed that Tesla barely generated net cash after necessary investments. In capital-intensive sectors, EBITDA without capex context is meaningless.

2. Dismissing stock-based compensation as "non-cash." Meta's 2022 stock compensation hit $13.7 billion—22% of revenue. While technically non-cash, this dilutes existing shareholders by creating new shares. Investors who ignored this "non-cash" expense missed that Meta's real economic profit was billions lower than reported net income suggested.

3. Missing revenue recognition changes between periods. When Salesforce shifted from upfront license fees to subscription billing in 2017-2018, reported revenue growth slowed dramatically despite strong underlying business momentum. Investors who didn't catch the accounting change misread the company's trajectory and missed opportunities.

4. Comparing EBITDA multiples across different capex intensities. A 15x EBITDA multiple looks expensive for Walmart (low capex) but cheap for Amazon Web Services (massive data center investments). The mistake costs money when investors overpay for asset-light businesses or miss value in capital-intensive ones.

The fix is simple: always check the cash flow statement first.