The ASC 606 effective date depends on the type of entity. Public business entities, certain not-for-profits with publicly traded securities, and employee benefit plans that file with the SEC had to apply Revenue from Contracts with Customers to annual reporting periods beginning after December 15, 2017, including interim periods within that year. For calendar-year public companies, that meant the 2018 financial statements were the first to reflect the new standard. All other entities had until annual reporting periods beginning after December 15, 2018 under the original deferral, and eventually until periods beginning after December 15, 2019 after a second deferral issued in 2020.
The Public Company Effective Date
When the FASB issued ASU 2014-09 in May 2014, public entities were originally expected to adopt for annual reporting periods beginning after December 15, 2016.1Financial Accounting Standards Board. Revenue from Contracts with Customers (Topic 606) – ASU 2014-09 Companies pushed back on the compressed timeline. The scope of the changes and the effort required to remap existing contracts proved more demanding than expected.
In August 2015, the FASB issued ASU 2015-14, deferring the effective date by one year for all entities. After that deferral, public business entities, certain not-for-profits with publicly traded securities, and employee benefit plans filing with the SEC had to apply ASC 606 for annual reporting periods beginning after December 15, 2017, including interim periods within that year.2Financial Accounting Standards Board. Revenue from Contracts with Customers (Topic 606) – ASU 2015-14
For a calendar-year public filer, adoption fell on January 1, 2018. A public company with a June year-end applied it for the fiscal year starting after December 15, 2017, meaning its July 2018 fiscal year.
The Private Company Effective Date
Nonpublic entities were treated separately from the start, and their deadline moved twice.
Under the original ASU 2014-09 timeline, nonpublic entities were expected to adopt for periods beginning after December 15, 2017. The 2015 deferral pushed that to annual reporting periods beginning after December 15, 2018, with interim period adoption required for periods beginning after December 15, 2019.2Financial Accounting Standards Board. Revenue from Contracts with Customers (Topic 606) – ASU 2015-14
A second deferral came in June 2020 through ASU 2020-05. The motivation was twofold: private franchise-industry companies were still working through how the standard applied to initial franchise fees, and the COVID-19 pandemic had compressed implementation timelines for organizations that had not yet finished the transition. ASU 2020-05 extended the deadline for nonpublic entities that had not yet issued or made available financial statements reflecting adoption. Those entities could wait until annual reporting periods beginning after December 15, 2019, with interim periods following a year later.3Financial Accounting Standards Board. Accounting Standards Update 2020-05 – Revenue from Contracts with Customers (Topic 606) and Leases (Topic 842)
The second deferral was not automatic for everyone. It was available only to nonpublic entities that had not yet issued (or made available for issuance) financial statements reflecting ASC 606 adoption. A private company that had already moved to the new standard on the earlier schedule could not roll back.
Early Adoption
Any entity, public or private, could adopt ASC 606 ahead of its mandatory deadline, but not without limit. Early adoption was allowed only as of annual reporting periods beginning after December 15, 2016, which was the original pre-deferral public entity effective date.2Financial Accounting Standards Board. Revenue from Contracts with Customers (Topic 606) – ASU 2015-14 In practical terms, no entity could apply the standard to a fiscal year that started before January 1, 2017.
How the IFRS 15 Date Compares
Companies that also report under IFRS should note that the international counterpart follows a different schedule. IFRS 15 applied to all entities, public and private, for annual periods beginning on or after January 1, 2018. The two standards are nearly identical in substance, with only a few discrete differences in areas such as licensing and collectibility. For multinational companies reporting under both frameworks, the convergence reduced reconciliation between U.S. GAAP and IFRS revenue figures.
What Your Adoption Method Choice Depended On
The effective date determined when a company had to adopt, but each company also chose how to adopt. The choice was permanent once made.
Full Retrospective Method
Under this approach, a company restated all prior periods presented in its financial statements as though ASC 606 had always been in effect. Comparability across years was high, which analysts and investors generally preferred. The cost was significant. Accounting teams had to go back through years of historical contracts and apply the five-step model retroactively. For companies with complex, long-term arrangements, the workload was substantial.
Modified Retrospective Method
The alternative was to apply ASC 606 only to the current period, with no restatement of prior years. Instead, the company recorded a one-time cumulative effect adjustment to the opening balance of retained earnings on the adoption date. That adjustment captured the net difference in assets and liabilities that would have existed if the standard had been applied from the start.4U.S. Securities and Exchange Commission. Editas Medicine, Inc. Quarterly Report (Form 10-Q) – Revenue Recognition
Companies using the modified retrospective method had to disclose the dollar impact of ASC 606 on each financial statement line item for the current period and explain why those amounts differed from what prior rules would have produced. The current year’s revenue numbers sat next to prior-year comparatives calculated under different rules, so the disclosure carried the burden of comparability that a restatement would otherwise have provided.
Private Company Expedients
Alongside the extended deadlines, the FASB offered nonpublic entities several practical expedients that shrank the transition workload:
- Nonpublic entities could skip the retrospective analysis of contract amendments that occurred before their adoption date.
- Contracts where all revenue had already been recognized under prior rules could be excluded from the ASC 606 analysis entirely.
- When the costs of obtaining a contract (such as sales commissions) would have been amortized over a period of one year or less, nonpublic entities could expense them immediately rather than capitalize and amortize.
A private company that elected all three could narrow the population of contracts requiring detailed analysis to open, ongoing arrangements.
Tax Method-Change Timing
The book adoption year drove the tax filing. Changing how revenue is recognized for financial reporting does not automatically change how it is recognized for tax purposes, and the IRS built a process for aligning the two.
Revenue Procedure 2018-29 established an automatic consent process under Internal Revenue Code Section 446 for taxpayers changing their tax accounting methods to conform with ASC 606. Companies could file Form 3115 for the taxable year in which they adopted the new standard, with the option of implementing the change on either a cut-off basis or with a Section 481(a) adjustment that spreads the impact over multiple years.5Internal Revenue Service. Revenue Procedure 2018-29
The Tax Cuts and Jobs Act added a wrinkle. Under the Act, revenue generally cannot be recognized for tax purposes in a period later than when it appears in financial statements, with limited exceptions. Companies that accelerated revenue recognition under ASC 606 sometimes found their tax obligations pulling forward in the same adoption year, so the financial reporting date and the tax method-change filing needed to be coordinated rather than sequenced.