US GAAP vs IFRS: Differences That Change the Numbers

Introduction

Two retailers lease identical stores at the same rent. The one reporting under US GAAP shows the rent as an operating expense above earnings before interest, taxes, depreciation and amortization (EBITDA). The one reporting under IFRS shows no rent at all: the same payments appear as depreciation and interest, both below EBITDA. Same stores, same cash, and the IFRS reporter's EBITDA is higher by roughly the full annual rent. Apply the same EBITDA multiple to both and the valuation gap comes entirely from the accounting standard.

That example is the most important difference between US GAAP (generally accepted accounting principles), the standards set by the Financial Accounting Standards Board (FASB) for US companies, and IFRS Accounting Standards, issued by the International Accounting Standards Board (IASB) and used by listed companies across most of the world. The two frameworks have converged on many topics over the past two decades, so a banker does not need to relearn accounting for international work. What a banker does need is a precise map of the remaining differences that change EBITDA, net income, cash flow or the balance sheet, and a habit of adjusting for them before comparing companies.

US domestic registrants file with the Securities and Exchange Commission (SEC) under US GAAP. Listed companies in the European Union, the United Kingdom, Canada, Australia and most other major markets outside the United States report under IFRS, as do many of the foreign companies listed in New York. Since a 2007 decision, the SEC has accepted financial statements from foreign private issuers prepared under IFRS as issued by the IASB without a reconciliation to US GAAP, so a comparable set built from SEC filings can mix the two frameworks without any warning on the page.

IFRS Accounting Standards

The accounting standards issued by the International Accounting Standards Board (IASB): the International Financial Reporting Standards (IFRS) and the older International Accounting Standards (IAS) still in force. They are required or permitted for listed companies in most jurisdictions outside the United States and are accepted by the SEC from foreign private issuers.

The two frameworks also differ in style. US GAAP is detailed, with extensive industry-specific guidance and bright-line tests built up over decades, while IFRS standards are shorter and lean more on broad principles and management judgment. In practice this means two IFRS reporters in the same industry can make different, equally acceptable choices, so a banker comparing them reads the accounting policy notes as closely as a banker comparing an IFRS reporter with a US one.

US GAAP

Generally accepted accounting principles in the United States, the body of accounting standards codified by the Financial Accounting Standards Board (FASB) in its Accounting Standards Codification (ASC) and required for US public companies filing with the SEC.

The frameworks now agree on several topics that once differed. Revenue recognition follows the same five-step model in ASC 606 and IFRS 15, fair value has a common definition, and both bring leases onto the balance sheet. The institutions behind each framework, and how they coordinate, are described in who sets the accounting rules, and a shorter overview aimed at interviews is in the explainer on GAAP vs IFRS for investment banking.

The differences that matter for valuation and credit work fall into a manageable list. Each row below has its own explanation in this guide, either in a panel within the relevant US GAAP article or in a dedicated article where the difference changes the whole mechanics:

The table is a starting point, not a substitute for each company's notes. Many IFRS options, such as revaluation or the interest classification, are policy elections, so two IFRS reporters can differ from each other as much as from a US company.

These are the differences most likely to distort a multiple, because they change the earnings figure that multiples are applied to.

Leases: The Largest Single Difference

Under ASC 842, a lessee classifies each lease as operating or finance, and an operating lease produces a single straight-line lease cost within operating expenses. Under IFRS 16, Deloitte's comparison roadmap notes that there is only a single accounting model for lessees: every lease is accounted for like a finance lease, with depreciation of the right-of-use asset and interest on the lease liability. Consider a five-year lease of $100 a year discounted at 8%, which puts a lease liability of about $399 on the balance sheet at the start under both frameworks:

EBITDA is 50% higher under IFRS, operating profit is higher, and pre-tax income is lower in the early years because interest is front-loaded. The cash paid is the same $100 in both cases, but IFRS presents the principal portion in financing activities, so operating cash flow is higher too. For businesses with large lease books, such as retailers, airlines and restaurant chains, this single difference can move leverage ratios by a turn or more and shift enterprise value to EBITDA multiples materially. The US model is explained in lease accounting under ASC 842 and the IFRS model in leases under IFRS 16.

Two narrower lease differences matter in specific situations. IFRS 16 offers an exemption for leases of low-value assets, which the IASB's basis for conclusions puts at roughly $5,000 or less when new, while US GAAP has no such exemption; both frameworks exempt short-term leases of twelve months or less. And in a sale-leaseback, US GAAP recognizes the entire gain when the transfer qualifies as a sale, while IFRS limits the gain to the portion relating to the rights the seller has actually given up, so a company selling its headquarters and leasing it back reports a smaller gain under IFRS. The treatment of these transactions is covered in sale-leaseback accounting.

Development Costs and Inventory

Under IFRS, development spending must be capitalized as an intangible asset once a project meets six criteria, including technical feasibility and the intention and ability to complete it, while under US GAAP research and development is generally expensed as incurred, with exceptions for software. An IFRS automaker or medical device company can therefore report higher EBITDA than a US peer with identical spending, with the capitalized amount amortized below EBITDA later. If a company spends $100 on development in a year and $60 of it relates to projects that meet the criteria, the IFRS reporter expenses $40 and capitalizes $60, so its EBITDA is $60 higher than a US peer's for that year. The EBITDA gap lasts for as long as the company keeps capitalizing, because the amortization of earlier projects always sits below EBITDA; at the operating profit level, a company investing at a steady pace eventually amortizes about as much each year as it capitalizes, and the gap narrows. The mechanics are covered in development costs under IFRS.

Inventory produces two further differences. LIFO (last-in, first-out), which US companies may use and which assigns the most recent costs to cost of goods sold, is prohibited under IFRS. In a period of rising prices a LIFO company reports lower gross margins and lower inventory than a peer using FIFO (first-in, first-out), an effect that can be quantified through the LIFO reserve, as explained in inventory costing methods. Separately, IFRS requires inventory write-downs to be reversed when values recover, while US GAAP prohibits reversals, so an IFRS company's margins rebound faster after a downturn.

Stock Compensation and Pensions

Stock-based compensation diverges in timing. For awards that vest in tranches over several years, US GAAP allows companies to recognize the cost on a straight-line basis, while IFRS treats each tranche as a separate award, which front-loads the expense. A four-year award vesting in equal annual tranches therefore produces a heavier charge in its first year under IFRS than under a US company's straight-line policy, even though the total cost over the four years is the same. For technology companies that pay heavily in stock, the difference can be visible in operating margins, and it is one more reason bankers often compare such companies on EBITDA before stock-based compensation as well as after it, using the detail in stock-based compensation accounting.

Pensions push in the same direction for many companies. Under US GAAP, an expected return on plan assets reduces pension cost, while IFRS applies the discount rate to the net pension deficit or surplus, which, as Deloitte's comparison of employee benefit accounting notes, often results in less periodic benefit cost under US GAAP. IFRS also records remeasurement gains and losses in other comprehensive income permanently, while US GAAP lets companies park them in other comprehensive income and amortize them into earnings over time, or recognize them immediately.

Where pension cost sits on the income statement matters as much as its size, because only the parts inside operating income affect EBITDA and EBIT. The accounting behind each component, and how bankers treat pension deficits in valuation, is covered in defined benefit pension accounting.

Several differences change the size of assets and liabilities more than earnings, and those matter for leverage, book value and the enterprise value bridge.

Asset Values and Impairments

IFRS allows companies to carry property, plant and equipment, and intangibles traded in an active market, at revalued amounts, and to carry investment property at fair value with changes in profit or loss; US GAAP permits neither. Impairment testing also differs. According to PwC's comparison of the two impairment models, US GAAP first tests whether an asset's carrying amount is recoverable from undiscounted cash flows, while IFRS compares it directly with a recoverable amount, the higher of fair value less costs of disposal and a discounted value in use, so impairments of assets in use can be recognized earlier under IFRS. IFRS also allows impairment losses to be reversed, except on goodwill, while US GAAP prohibits reversals. For listed property companies, the investment property choice is the one that matters: an IFRS landlord using the fair value model reports changes in the value of its buildings in profit or loss each year and records no depreciation, while a US real estate company depreciates its buildings at cost, which is one reason analysis of US real estate investment trusts (REITs) relies on supplemental measures that add depreciation back. The revaluation option is explained in the revaluation model under IFRS, and the US tests in impairment of long-lived assets.

Provisions and Contingent Liabilities

Both frameworks record a liability for a lawsuit or a warranty claim when an outflow is probable and can be estimated, but the word probable means different things. Deloitte's comparison of contingencies describes it as more likely than not, greater than 50%, under IFRS, against likely to occur, generally above 70%, under US GAAP. When every outcome in a range is equally likely, IFRS records the midpoint and US GAAP the low end, and IFRS requires discounting where the effect is material. Restructuring costs show the same pattern: IAS 37 records a provision once a detailed plan has been announced or started, while ASC 420 generally waits until each cost is incurred. IFRS reporters therefore tend to carry more and larger provisions, recorded earlier, which matters when provisions are treated as debt-like items. The US rules are covered in contingencies and litigation reserves.

Debt, Equity and Noncontrolling Interests

Classification differences change what counts as debt. IFRS splits a convertible bond into a liability and an equity component, so reported interest expense reflects a market rate on straight debt, while US GAAP generally records the whole instrument as a liability carrying a lower coupon-based expense. Shares that oblige the issuer to pay cash are liabilities under IFRS, while US GAAP places shares with conditional redemption features in temporary equity, between liabilities and equity. In acquisitions, US GAAP measures a noncontrolling interest at fair value, while IFRS lets the buyer choose fair value or the minority's proportionate share of net assets, which records less goodwill. The US treatments are explained in convertible debt accounting and noncontrolling interest.

Consolidation: Who Is Inside the Group

The frameworks also draw the boundary of the group differently. Deloitte's comparison of consolidation models explains that IFRS applies a single control-based model to every investee, while US GAAP uses two models: one for variable interest entities, which turns on which party directs the most significant activities and absorbs the economics, and a voting interest model for everything else. IFRS also recognizes de facto control, where an investor with less than half the votes can still control an investee whose other shareholders are widely dispersed, a concept US GAAP does not have. An investor holding 45% of a company with no other large shareholder may therefore consolidate it under IFRS and account for it under the equity method under US GAAP, changing revenue, EBITDA and reported debt. How US GAAP decides, including the variable interest model, is explained in variable interest entities.

The cash flow statement looks alike under both frameworks but is classified differently. US GAAP places interest paid and received in operating activities and dividends paid in financing. IFRS has historically allowed choices: interest paid could be operating or financing, and interest and dividends received operating or investing. Combined with IFRS 16, which moves lease principal into financing, an IFRS company can report noticeably higher operating cash flow than a US peer with identical cash movements. Free cash flow definitions built from operating cash flow inherit the difference, as covered in classifying interest, dividends and taxes paid.

That flexibility is narrowing. The IASB's IFRS 18 replaces IAS 1 for annual periods beginning on or after 1 January 2027. It introduces defined subtotals for operating profit and for profit before financing and income taxes, requires disclosure of management-defined performance measures, and removes most of the cash flow classification options for interest and dividends. US GAAP has no equivalent operating profit definition, so the frameworks will still differ in presentation, but IFRS reporters will become more comparable with each other. The change and its consequences are covered in IFRS 18 and the new income statement.

Bankers do not restate full financial statements from one framework to the other. They adjust the handful of figures that drive the analysis, using the notes. The workflow is consistent:

Applied to the lease example above, the adjustment is mechanical. To put the IFRS company on a US basis, deduct the $100 of annual lease payments from its EBITDA of $300, giving $200, and remove the $399 lease liability from its net debt, since a US company's operating lease liabilities are usually left out of net debt. Alternatively, move the US company onto the IFRS basis by adding its $100 of operating lease cost back to EBITDA and its lease liability to net debt. Either route gives consistent numerators and denominators; mixing the two, for example IFRS EBITDA with debt that excludes leases, inflates the IFRS company's apparent capacity to borrow.

Not every difference deserves an adjustment. A provision measured at the midpoint rather than the low end of a range, or a small revaluation reserve, rarely changes a multiple enough to matter, and adjusting for it adds estimation error of its own. The test is materiality to the conclusion: adjust when the difference would change the ranking of a company within its peer set or move a valuation range, and disclose the rest as a known limitation.

The full method, with worked adjustments for leases, development costs and inventory, is in adjusting IFRS reporters for US comparisons. The underlying principle is that comparability matters more than either framework being right. A multiple only means something when the earnings in the numerator of every company in the set are measured the same way, and for cross-border comparisons that rarely happens without a deliberate adjustment, with leases almost always the first one to make.