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Why do companies report non-GAAP earnings, and should investors trust them?

Every public company files audited GAAP (or IFRS) statements, then immediately tells investors: "But those numbers don't really tell the story. Here are our adjusted numbers, which are the real picture." This ritual of earnings massage has become so routine that earnings calls often mention adjusted EBITDA before mentioning GAAP net income. Investors face a choice: trust the audited, standardized GAAP number or trust management's custom "adjusted" version.

The answer is rarely pure trust in either. Non-GAAP metrics exist for sound reasons—depreciation is a non-cash charge, stock comp distorts earnings—but they also exist because they make companies look better. The line between legitimate adjustment and spin is blurry, and management has every incentive to cross it.

Quick definition: Non-GAAP (or non-IFRS) metrics are earnings measures that exclude items deemed non-recurring, non-operational, or non-economic under GAAP or IFRS rules. Common adjustments include depreciation and amortization (D&A), stock-based compensation, restructuring charges, and impairments. Companies argue these adjustments reveal "true operational earnings" by stripping out one-time or non-cash noise; investors argue they allow companies to obscure real costs.

Key takeaways​

  • Stock-based compensation is the most contentious non-GAAP adjustment, because it is a real cost to shareholders (dilution) but non-cash to the income statement, creating a plausible case for exclusion—and an equal case for inclusion.
  • Adjusted EBITDA has become an industry standard despite lacking any regulatory definition, making it a race to the bottom as companies add more and more items to the numerator to make growth look stronger.
  • The SEC has rules on non-GAAP disclosure (under Regulation G and Item 10(e) of Regulation S-K), but enforcement is sporadic and definitions widely diverge.
  • Non-IFRS metrics under IFRS are even less regulated, with companies in Europe and Asia often reporting "adjusted" or "underlying" earnings with minimal standardization.
  • One-time items frequently recur, turning the "non-recurring" adjustment into a permanent distortion of earnings.
  • Peer comparability collapses when companies adjust for different items, making normalized earnings useless for sector comparisons.

Stock-based compensation: the central non-GAAP debate​

Start here, because stock-based comp (SBC) is the most defensible—and most abused—non-GAAP adjustment.

The case for excluding SBC:

SBC is a non-cash charge. A technology company reports $1 billion in net income under GAAP, but that includes $300 million in stock-based compensation expense (vesting shares, options, RSUs). The cash outflow was zero; the earnings drag was entirely an accounting convention. The CFO argues: "We pay employees partly in stock, just as we pay rent in cash. The stock expense is real dilution to shareholders, not cash expense. Our true operational earnings—the cash earnings available to investors—are $1.3 billion."

This logic is sound. Stock is a cost, but it is paid to employees and not extracted from operating cash. Excluding it reveals how much cash the business generates.

The case for including SBC:

But here is the catch: excluding SBC is also a distortion. If a company pays all employees in stock, the GAAP net income (after SBC) is the true economic earnings to shareholders. Ignoring SBC is akin to an Apple executive saying "Let's ignore the $50 billion we spend on manufacturing, because manufacturing is non-cash amortization." (It is not—manufacturing is cash—but the point is that real costs should not be arbitrarily excluded.)

Moreover, stock dilutes shareholders just as surely as cash dividends. If a company reports $10 of earnings per share but diluted share count grew 5% due to stock awards, the true earnings per share is lower. Backing out the SBC expense overstates real per-share value creation.

Worse, companies have every incentive to grant ever-larger stock packages, disguising compensation as a non-cash cost. In the 2010s-2020s, tech companies grew SBC from 5% to 10-15% of operating income, telling investors it was "non-cash" and should be ignored. But SBC is not free; it is deferred compensation, paid in shares that dilute future earnings.

The reality: Most investors now split the difference. They accept that SBC is a real cost, but they track it separately from cash operating expense. A model might include SBC in one earnings version ("fully-diluted earnings including SBC") and exclude it in another ("cash operating earnings, SBC excluded"), then compare both to valuation multiples.

Depreciation and amortization: a cleaner case​

Depreciation and amortization (D&A) are non-cash charges, and the case for excluding them is stronger than SBC:

  • D&A is a mechanical spread of a past capital expenditure over its useful life
  • It is defined by arbitrary choices (asset life, salvage value) made by management
  • It does not affect operating cash flow directly

A mature company with stable, fully-depreciated assets might report net income of $500M, but $200M of that is D&A from old assets. The company is generating $700M in cash from operations but only $500M in GAAP net income. Excluding D&A reveals the true cash-generation capacity.

This is why EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) exists and is widely accepted. Most investors use EBITDA as a proxy for cash operating earnings, particularly for capital-intensive companies (utilities, railroads, airlines).

The trap: companies have extended "adjusted EBITDA" to exclude far more than D&A. A hotel company might report:

Net income: $100M
Add: Depreciation & amortization: $150M
Add: Interest expense: $50M
Add: Taxes: $60M
= EBITDA: $360M

Add: Stock-based comp: $20M
Add: Restructuring charges: $15M
Add: Impairment: $25M
Add: Corporate allocations: $10M
Add: Acquisition costs: $5M
= Adjusted EBITDA: $435M

Now EBITDA has grown from $360M (a standardized measure) to $435M (a fully-custom measure). The company is not hiding the adjustments—it is disclosed in a footnote—but the headline in the earnings press release reads "$435M in adjusted EBITDA, up 12% YoY." An inattentive investor might compare this $435M to a competitor's standardized EBITDA of $400M and think the hotel company is outperforming, when in reality the competitor has much tighter (and more comparable) adjustments.

The one-time item trap: when non-recurring becomes recurring​

One of the most obvious tricks is reclassifying recurring items as "non-recurring" or "non-operational."

Real example (fictionalized):

A software company reports yearly restructuring charges of $50M, $60M, $55M, and $48M over four years. In each year's adjusted earnings, the CFO backs out the restructuring charge, calling it "non-recurring." But restructuring has recurred every single year. It is not a one-time event; it is an ongoing cost of managing the workforce in a dynamic market.

By excluding it from adjusted earnings, the company masks a structural cost. True operational earnings (GAAP net income) includes the restructuring; adjusted earnings do not. Investors who focus only on adjusted earnings overestimate earning power.

Another example:

A retailer with declining stores reports impairment charges of $30M in Year 1 (closing five unprofitable stores) and $20M in Year 2 (closing three more). In the press release, both are called "non-recurring restructuring costs." But if the company continues to underperform and close stores, these charges are quasi-recurring. Real operational earnings should account for ongoing store rationalization.

The fix is simple but requires discipline: track adjusted and GAAP earnings for three to five years. If a company repeatedly backs out the same types of charges (restructuring, impairments), they are recurring, not one-time, and should be included in normalized earnings.

The SEC's non-GAAP rules: guidance without teeth​

In 2003, the SEC adopted Regulation G, which requires companies that report non-GAAP metrics to:

  1. Reconcile non-GAAP to GAAP
  2. Explain the rationale for each adjustment
  3. Not give undue prominence to non-GAAP over GAAP in press releases or filings

The reconciliation requirement is useful—it forces transparency. But enforcement is weak. The SEC occasionally issues comment letters (informal warnings) to companies for egregious non-GAAP abuse, but it rarely initiates enforcement actions, and fines have been negligible.

More problematically, the SEC allows companies to define adjustments broadly. "Acquisition-related costs," "integration expenses," "legal and consulting fees," and "systems transition costs" are all vague buckets that different companies fill differently. Two companies in the same sector might adjust for different items, making "adjusted EBITDA" non-comparable.

Furthermore, the SEC's rules apply only in the US (GAAP regime). International companies reporting under IFRS face even less scrutiny on non-IFRS metrics, and European companies reporting "underlying earnings," "adjusted operating profit," and "pro forma earnings" often have no regulatory guardrails at all.

Non-IFRS metrics: the wild west​

IFRS, unlike GAAP, has no explicit regulatory framework for non-IFRS metrics. The IASB provides guidance but no rules. This has led to a proliferation of custom metrics, particularly in Europe and Asia:

  • Underlying earnings (excluding exceptional items)
  • Adjusted operating profit (excluding restructuring, amortization of intangibles)
  • Pro forma earnings (including acquisitions as if they'd been integrated all year)
  • Organic revenue growth (excluding acquisitions and FX)

Each company defines these differently. One European bank's "underlying profit" excludes goodwill impairment but includes FX losses; another's excludes both. Comparing the two requires manual restatement to a common definition, which is time-consuming and error-prone.

The practical result: for IFRS companies, non-IFRS metrics are less comparable than for GAAP companies, because there is no regulatory reconciliation requirement (though many companies do provide one voluntarily).

The pressure to adjust: earnings management and competitive dynamics​

Why do companies add more and more adjustments to reported earnings? Several forces:

  1. Analyst expectations. Sell-side analysts now issue "consensus estimates" on adjusted metrics, not GAAP. Companies manage to the adjusted number, not GAAP.

  2. Valuation multiples. Venture capital and private equity now negotiate investment terms based on "adjusted EBITDA" multiples (e.g., "We'll invest at 12x adjusted EBITDA"). This incentivizes companies to report higher adjusted EBITDA.

  3. Competitive pressure. If a competitor is adjusting for stock-based comp and restructuring, a company that does not adjust looks worse on relative metrics. Management feels forced to "level the playing field" with broader adjustments.

  4. Equity incentives. Many executives' bonuses are tied to non-GAAP EPS targets. An executive paid on "adjusted EPS" has a direct incentive to broaden the adjustments that define adjusted EPS.

  5. Regulatory arbitrage. Since the SEC allows broad adjustment categories, companies migrate toward more generous definitions over time.

Real-world examples​

Example 1: Tech company SBC creep

Meta (formerly Facebook) reported:

  • 2018: SBC of $8.5B on revenue of $55.8B (15.2% of revenue)
  • 2023: SBC of $13.8B on revenue of $114.6B (12.0% of revenue, but absolute amount grew 62%)

In earnings calls, management highlights adjusted operating income (SBC-excluded), which grew faster than GAAP operating income. But the absolute SBC expense remained massive and was one of the largest line items on the income statement. Excluding it from headline metrics masked a structural cost that dilutes shareholders.

Example 2: Hospitality adjusted EBITDA

A hotel REIT reported:

GAAP Net Income: $150M
Adjusted EBITDA: $420M

The reconciliation showed:

  • Depreciation: $200M
  • Interest: $80M
  • Taxes: $40M (tax rate was favorable due to depreciation deductions)
  • Stock-based comp: $20M
  • Corporate overhead: $30M
  • Real estate taxes (excluded as "property-level"): $10M
  • ...and nine other items totaling $20M

The adjusted EBITDA number had grown to something far removed from cash operating earnings. In fact, the company was managing capital-intensive properties with high depreciation; GAAP net income ($150M) was probably a better reflection of true earnings than an adjusted EBITDA that excluded the depreciation cost of assets critical to the business.

Example 3: IFRS company without reconciliation

A German manufacturing company reported in its annual report:

  • IFRS Net profit: €500M
  • "Underlying profit (before exceptional items)": €580M

The underlying profit adjusted for:

  • Impairment of intangible assets: €50M
  • Restructuring charges: €30M

But the company provided no reconciliation table, only narrative explanation. An investor comparing this to a GAAP competitor had to manually restate both to a common format, guessing at what "exceptional items" meant in the German context.

Common mistakes​

  1. Assuming adjusted earnings are comparable across companies. Stock-based comp, restructuring, and acquisition-related costs are adjusted differently by different companies. Always reconcile back to GAAP.

  2. Treating one-time adjustments as permanent. A company that adjusts for the same charge every year has a recurring cost, not a one-time item.

  3. Ignoring the long-term trend in adjustments. If adjusted earnings are growing much faster than GAAP earnings, management may be broadening the adjustment set to manufacture growth.

  4. Confusing adjusted earnings with cash earnings. Adjusted EBITDA is not the same as free cash flow; it still requires interest, taxes, and capex to be paid.

  5. Over-weighting non-GAAP metrics in valuation. If a company is valued at 12x adjusted EBITDA but GAAP earnings imply 8x multiple, the gap suggests adjusted metrics are hiding something.

  6. Mixing reconciliations. One company's "adjusted EBITDA" may include stock comp; another's may not. You cannot compare them without restatement.

FAQ​

Q: Is non-GAAP earnings always wrong to use? No. Non-GAAP metrics highlight legitimate non-cash or non-recurring items. But use them as a secondary lens, not the primary one. Always reconcile to GAAP, and always ask: "Would this adjustment still apply in three years?"

Q: Which non-GAAP adjustments are most defensible? Depreciation and amortization are the cleanest, because they are mechanical and defined by past asset purchases. Stock-based comp is defensible if tracked separately. Restructuring, impairments, and one-time items are the most subjective.

Q: Should I use the company's reconciliation, or create my own? Use the company's reconciliation as a starting point, but audit it. Look for items that recur, items that seem aggressive (corporate overhead, acquisition costs), and compare the adjustment set to peers. If your company adjusts more broadly than competitors, be suspicious.

Q: If adjusted EBITDA is so manipulable, why do lenders and investors use it for valuation? Because it is a useful proxy for cash operational earnings when standardized across a sector. But standardization requires that all companies adjust for the same items in the same way, which rarely happens. In practice, adjusted EBITDA is a starting point, not an endpoint, for valuation.

Q: Can I use adjusted earnings to forecast future earnings? Only if the adjustments are truly non-recurring. If restructuring charges recur, and if stock comp is an ongoing cost, then normalized GAAP earnings are better for forecasting than adjusted earnings.

Q: Do private companies use non-GAAP adjustments? Yes, extensively. In due diligence for M&A or private equity deals, buyers demand "adjusted EBITDA" to assess operational cash generation separate from financing, taxes, and one-time items. But in private deals, the buyer and seller negotiate the adjustment set, so at least there is transparency and agreement.

Q: Why do European IFRS companies disclose non-IFRS metrics with less oversight? Because the IASB does not mandate reconciliation rules the way the SEC does. European regulators (ESMA) have issued guidance, but it is not a hard rule. Most large European companies now provide voluntary reconciliations in response to investor pressure.

  • Earnings Management — Companies use adjustments to smooth earnings or meet analyst expectations.
  • Cash Flow vs. Earnings — Non-GAAP adjustments may distort the cash-flow picture; always reconcile to operating cash flow.
  • Equity Compensation — Stock-based comp is a function of headcount, market cap, and retention goals; it should be modeled separately.
  • EBITDA and Enterprise Value — EV/EBITDA multiples are most useful when EBITDA is standardized across peers.
  • Free Cash Flow — Non-GAAP metrics should not be confused with true free cash flow, which includes capex and taxes.

Summary​

Non-GAAP and non-IFRS metrics exist because standardized accounting rules do not capture every nuance of operational performance. Excluding stock-based comp, depreciation, and one-time charges can reveal the underlying cash-generation power of a business. But this power is often exaggerated. Companies broaden adjustment sets, reclassify recurring items as non-recurring, and lean on adjusted metrics to tell stories that GAAP earnings do not support.

The fix is not to ignore non-GAAP metrics; they contain useful information. The fix is to verify them. Always reconcile to GAAP. Audit the adjustments for persistence and peer comparability. If adjusted earnings are growing much faster than GAAP earnings, ask why. And remember: the SEC requires reconciliation, but reconciliation does not guarantee comparability.

Next​

In Cross-listed companies and reconciliation footnotes, we examine how companies that list on both US and international exchanges must reconcile GAAP and IFRS numbers in their filings.