IFRS Advisory for US CPA Firms: What You Need to Know Before Taking an IFRS Engagement
Why IFRS Advisory Is Different From Everything Else You Do
Most US CPA firms handle tax. Many handle audit. A growing number are expanding into advisory. But IFRS advisory sits in a separate category — and treating it like any other advisory engagement is the fastest route to a professional liability claim.
IFRS is not simply a different version of US GAAP. It operates under a different conceptual framework, uses different measurement bases, and in key areas produces materially different financial outcomes. A CPA firm that enters an IFRS engagement without understanding this is not adding a service line — it is accepting a risk it has not priced and may not be competent to manage.
This guide is for firm leaders evaluating whether to take IFRS work, and for partners who already have a client with IFRS requirements and need to understand the full scope before committing.
Who Is Actually Asking US CPA Firms for IFRS Work
Three client types generate the majority of IFRS requests landing on US CPA firm desks in 2026.
Foreign subsidiaries of non-US parent companies. A Turkish, German, or Japanese parent reports under IFRS. The US subsidiary needs IFRS-compliant reporting for consolidation purposes. The local CPA firm has the relationship — but not always the technical capability.
US companies preparing for a foreign listing or cross-border acquisition. An acquisition target needs to present IFRS financials for a European acquirer. A US company preparing for a London or Dubai listing needs an IFRS restatement. These are time-sensitive, high-stakes, and highly visible engagements.
US companies with significant foreign operations. Where a US parent has adopted IFRS for subsidiary reporting to simplify consolidation, or where a non-public company anticipates future international operations.
The common thread is that IFRS competence is rarely available in the client's existing advisor network, creating genuine opportunity for firms that have built the capability.
The Eight Standards That Create the Most Issues in Practice
Firms entering IFRS advisory consistently encounter the same set of standards disproportionately. Understanding where IFRS and US GAAP diverge most sharply is the prerequisite to scoping any engagement accurately.
IFRS 15 / ASC 606 Revenue Recognition. The models are broadly converged but not identical. Performance obligation identification, variable consideration, and contract modifications are handled slightly differently. In long-term contract industries — construction, software, professional services — the differences can be material.
IFRS 16 / ASC 842 Leases. Both standards bring leases on-balance-sheet, but the exemptions, discount rate methodologies, and classification criteria differ. Operating lease liability calculations under IFRS 16 frequently differ from ASC 842 results on the same portfolio.
IAS 36 Impairment of Assets. IFRS uses a single-step impairment model based on recoverable amount. US GAAP uses a two-step model for goodwill and a recoverability test for long-lived assets. Impairment triggers, timing, and reversal rules differ materially — and impairment reversals, permitted under IFRS for assets other than goodwill, are prohibited under US GAAP.
IAS 38 Intangible Assets. Development costs must be capitalized under IFRS once certain criteria are met. Under US GAAP, development costs are generally expensed. This single difference can produce significantly different P&L and balance sheet outcomes in technology, pharmaceutical, and R&D-intensive businesses.
IAS 2 Inventories. IFRS prohibits LIFO. For any US client using LIFO, an IFRS conversion requires a full LIFO reserve unwinding. The tax and financial statement implications are significant.
IAS 12 Income Taxes. The deferred tax methodology under IFRS is balance-sheet based — identical conceptually to US GAAP — but the detailed application differs, particularly around uncertain tax positions, intragroup transactions, and tax rate changes. IAS 12 does not have an equivalent to ASC 740-10-25-6's separate recognition guidance for uncertain tax positions, which creates differences in how tax positions are recognized and measured.
IFRS 9 Financial Instruments. The classification and measurement model under IFRS 9 differs from ASC 815/825 in several respects, particularly around the business model assessment and the SPPI test for debt instruments. The expected credit loss model under IFRS 9 also differs from CECL in timing and application.
IAS 19 Employee Benefits. Defined benefit pension accounting under IAS 19 and ASC 715 is structurally similar but differs in the corridor method (now eliminated under IAS 19), OCI recycling, and the components of defined benefit cost. For any client with a defined benefit scheme, this is a potentially material area.
Competence Requirements Before You Accept the Engagement
The AICPA and most state boards require that CPA firms only accept engagements for which they have — or can obtain — the requisite technical competence. For IFRS work, this means something specific.
The relevant standards are issued by the International Accounting Standards Board (IASB) and the IFRS Interpretations Committee (IFRIC). They are not the same as FASB standards, and years of US GAAP experience does not automatically translate. The firm needs personnel who have studied the IFRS standards specifically, worked through the application differences, and ideally have prior IFRS engagement experience.
Before accepting an IFRS engagement, a firm should be able to answer yes to all of the following:
Can we identify which IFRS standards apply to this client's industry and transactions? Can we identify the material differences between IFRS and US GAAP for this client? Do we have access to the IASB's full standards and IFRIC interpretations? Have our engagement team members completed specific IFRS CPE in the last two years? Can we identify when we need external specialist support — and do we have a relationship with a specialist firm?
A no on any of these should pause the engagement until the competence gap is addressed.
Scoping an IFRS Engagement: Where Firms Leave Money on the Table
IFRS engagements are consistently under-scoped by firms doing them for the first time. The scope needs to cover every element where IFRS treatment differs from what the client is currently doing.
A thorough scope assessment starts with a diagnostic: a structured review of the client's balance sheet and income statement to identify every line where IFRS treatment may differ. The output of the diagnostic is a list of differences requiring accounting policy decisions, remeasurement, and disclosure changes.
Common scope items that get missed in first-time engagements include: functional currency determination and translation methodology for foreign operations; the IFRS first-time adoption elections under IFRS 1 and their implications for opening balance sheet balances; disclosure requirements, which are frequently more extensive under IFRS than US GAAP; and the comparative period requirements under IFRS, which require restating the prior year on the same IFRS basis.
The engagement letter should explicitly define whether you are providing: a conversion from US GAAP to IFRS, an ongoing IFRS reporting service, a technical advisory opinion, or a training and advisory service to the client's internal team. Each has a different scope, different deliverable, and different liability profile.
First-Time Adoption: The Special Case That Deserves Its Own Section
If the client is adopting IFRS for the first time — converting from US GAAP rather than maintaining dual reporting — IFRS 1 First-Time Adoption of International Financial Reporting Standards applies.
IFRS 1 provides mandatory exceptions and optional exemptions from full retrospective application. Understanding these elections and their implications is essential for structuring the conversion efficiently. The wrong elections can create unnecessary complexity or produce an opening balance sheet that will require explanation to users.
Key mandatory exceptions under IFRS 1 prohibit retrospective application in several areas including estimates (you use the estimates made at the original date, not updated figures), derecognition of financial assets and liabilities, and certain hedge accounting treatments.
The optional exemptions include, among others, the ability to use deemed cost for property, plant and equipment (fair value as deemed cost at the transition date), business combinations (not restating pre-transition combinations), and cumulative translation differences (resetting to zero at transition). Each election must be disclosed and the implications modeled before selection.
Pricing IFRS Advisory Correctly
IFRS advisory is consistently underpriced by US CPA firms. The reasons are structural: unfamiliarity with the scope complexity, competition from international audit firms that include IFRS work in bundled fees, and a tendency to price based on hours rather than value.
A better pricing approach acknowledges three factors. First, IFRS advisory carries a premium because the competence is scarce in the US market — particularly outside major metropolitan areas. Second, the risk profile is higher than standard advisory because the output is used for financial reporting, often by users in multiple jurisdictions. Third, the client benefit is typically significant — access to international capital markets, compliance with parent company requirements, or facilitation of a transaction that depends on IFRS financials.
Firms that price IFRS advisory correctly anchor to the value delivered, not the hours spent. A conversion engagement that enables a client to complete a cross-border acquisition or raise international capital is worth substantially more than the equivalent hours in domestic tax advisory.
When to Bring in Specialist Support
Not every IFRS question can or should be answered in-house. Knowing when to bring in specialist support — and having the relationships to do it — is part of delivering a competent IFRS service.
Specialist support is warranted when: the engagement involves complex financial instruments, insurance contracts, or industry-specific IFRS standards that the firm has not previously encountered; the audit committee or board requires a second opinion on a material accounting policy decision; the client is preparing IFRS financial statements for an IPO, acquisition, or regulatory filing; or the transaction structure involves IFRS-specific issues in areas like business combinations, consolidated financial statements, or related party transactions.
Adil Habib Consulting provides specialist IFRS advisory support to US CPA firms handling these situations. We work as technical experts behind the firm, allowing you to maintain the client relationship while ensuring the work meets the required standard. Engagements are confidential and structured to support the firm's existing mandate, not to compete with it.
The Practical Checklist Before Accepting an IFRS Engagement
Before signing an IFRS engagement letter, work through the following:
Confirm your firm has adequate IFRS technical competence in the relevant standards, or identify how that competence will be obtained. Identify all areas where IFRS and US GAAP differ for this specific client. Scope the full engagement, including comparative period requirements, disclosure requirements, and any first-time adoption elections. Price the engagement based on scope, risk, and value — not by reference to your domestic advisory rates. Confirm the engagement letter defines the deliverable, the standard being applied, and the limitations of your work. Identify when specialist support may be required and establish the relationship before you need it.
IFRS advisory is high-value work with a real competence premium in the US market. Done well, it differentiates a firm from the domestic-only competition and commands fees that reflect genuine expertise. Done poorly, it exposes the firm to liability and reputational risk that no engagement fee justifies.
Work With a Specialist Who Has Done This Before
Adil Habib Consulting provides IFRS advisory and technical support to US CPA firms taking on international clients and cross-border engagements. Our background includes Big 4 audit training, IFRS conversion engagements, and technical advisory for firms navigating the US GAAP to IFRS transition for the first time.
We work with firms confidentially, as a technical resource behind the relationship. If you are evaluating an IFRS engagement or already in one and have questions about the technical application, contact us to discuss how we can support the work.
