How Mid-Year Tax Law Changes Break Your Q3 Provision — and the Catch-Up Pass Every Tax Team Must Run

Separate enacted-law changes, current top-up taxes and deferred-tax accounting. A September 18-cutoff alert is not a complete quarter-end inventory.

Editorial source review — November 1, 2026. This machine-generated article has been reviewed, but is not certified accurate. Source-backed corrections are incorporated where established. Other legal, survey and product claims may remain unverified; check applicable primary authorities before relying on a deadline or tax position.

Findings in the original version: the article correctly highlights enactment-period review but says every listed change has a deferred-tax effect, including Pillar Two. It also calls a September 18-cutoff publication a complete quarter inventory.

GloBE deferred-tax inputs are not the same thing as recognising a financial-statement deferred tax asset or liability for future top-up taxes.

What the FASB staff discussion says

In its February 1, 2023 technical-inquiry discussion, FASB staff viewed the illustrated GloBE minimum tax as an alternative minimum tax under Topic 740. Deferred tax assets and liabilities would not be recognised or adjusted for the estimated future effects of that minimum tax. The record cites ASC 740-10-30-10 through 30-12 and 55-31/55-32.

The staff expressly conditioned the view on the inquiry's facts. Evaluate each enacted regime against those facts. A tax called “minimum tax” does not automatically qualify for identical treatment, nor does every new QDMTT enactment automatically require a new DTA or DTL.

Separate the workstreams

Calculate current top-up tax, GloBE deferred-tax adjustments and ordinary financial-statement deferred taxes separately. Evaluate disclosures and the treatment of other income-tax amendments under the relevant accounting framework. Do not confuse enactment with effective date or a secondary alert's publication date.

Quarter-end completeness

A quarterly publication with a September 18 cutoff cannot establish a complete September 30 inventory. Supplement it with the applicable primary instruments for September 19–30. A list of policy developments is not proof that every item changes the company's deferred taxes.

Sources

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Sources