ASC 718 for Private Companies:
The Complete Stock Compensation Guide

ASC 718, Compensation — Stock Compensation, requires companies to recognize the fair value of equity-based awards as compensation expense over the requisite service period. For public companies, the mechanics are well-established: you observe a stock price, reference peer volatility, and apply a standard model. For private companies, none of those inputs are directly observable — and that gap creates significant judgment exposure under audit.

This guide addresses private company ASC 718 specifically: the inputs that differ from public company practice, the accounting elections available to non-public entities, the audit questions that arise at every year-end, and the documentation standard required to defend each assumption.

The Private Company Problem: No Observable Stock Price

The single most consequential difference between public and private ASC 718 is the absence of a quoted market price. Under ASC 718-10-20, the grant date fair value is the measurement attribute for equity awards — and for stock options, the underlying stock price at grant date is the most critical input to any option pricing model.

For private companies, that stock price is the conclusion of a separate valuation engagement: the IRC §409A independent appraisal. The ASC 718 model ingests the 409A fair market value as the stock price input. This creates a direct dependency: the quality of your ASC 718 expense calculation is only as defensible as the underlying 409A valuation.

Auditors scrutinize this link directly. The two most common inquiry points are:

• Was the 409A performed by a qualified independent appraiser (meeting IRS Reg. 1.170A-17 criteria)?
• Was the grant date within 12 months of the 409A effective date, or has a material event occurred that would invalidate the prior 409A?

Both questions have a straightforward answer if your 409A is timely, properly credentialed, and triggers correctly. If not, you may be required to obtain a retrospective "back-dated" 409A for prior grant dates — one of the most expensive and time-consuming audit remediation scenarios.

Expected Term: The Simplified Method for Private Companies

Expected term represents the weighted-average period between option grant and exercise or forfeiture. For public companies, this is estimated from employee exercise behavior in historical databases. Private companies have no such history.

The SEC Staff Accounting Bulletin (SAB) Topic 14.D.2 describes the simplified method: the average of the vesting term and the contractual term. For a standard 4-year vesting, 10-year contractual option, this produces an expected term of 6.25 years (average of 2.5 years midpoint of vesting and 10 years).

Under ASU 2016-09, the simplified method remains available for companies that:

• Have no relevant exercise history on which to base the estimate, or
• Have reason to believe the historical period is not representative of future expected behavior

Most private companies qualify on both criteria. The simplified method is not a shortcut — it is the appropriate standard for non-public entities without observable exercise behavior, provided it is applied consistently and documented with rationale.

Audit defense: Document that the simplified method was selected due to the absence of sufficient historical exercise experience, cite SAB 14.D.2, and confirm that the vesting and contractual terms used as inputs match the actual award agreements.

Expected Volatility: Peer Group Construction for Non-Public Entities

Expected volatility estimates how much the stock price will fluctuate over the expected term. Public companies use their own historical price data. Private companies must source volatility from a peer group of publicly traded companies.

The peer group construction process is where most private company ASC 718 analyses are challenged. Common deficiencies:

The defensible approach selects peers based on documented criteria: industry classification (GICS or SIC), revenue stage, growth profile, and business model comparability. Volatility is measured as historical realized volatility over a lookback period equal to the expected term. Outliers are screened using a Z-score or interquartile range test, and the rationale for each screen is documented.

Risk-Free Rate: Maturity Matching to Expected Term

The risk-free rate is the only ASC 718 input that is directly observable — it is the yield on a U.S. Treasury instrument with a maturity equal to the option's expected term. For a 6.25-year expected term, you reference the 7-year Treasury yield (the nearest available maturity) on the grant date.

This input is low-judgment for standard awards. However, two situations introduce complexity:

1. Awards with performance conditions: The service period may differ from the contractual term, requiring judgment about the appropriate risk-free rate maturity
2. Grants near a fiscal quarter end: If the grant date is in a high-rate or rapidly shifting yield environment, the point-in-time rate requires documentation — auditors in volatile rate environments request the Treasury yield source documentation on the grant date

Equity vs. Liability Classification: The Private Company Decision Point

Classification — whether an award is accounted for as equity or as a liability — is often the most consequential judgment in private company ASC 718. Liability-classified awards are remeasured at fair value every reporting period until settlement, creating P&L volatility that equity-classified awards do not. The classification decision drives both the accounting complexity and the audit risk.

Awards classified as liabilities include:

• Awards that can be settled in cash at the employee's election
• Awards where the settlement amount is indexed to a fixed number of shares multiplied by a variable price (common in phantom equity / SARs)
• Awards where the employee has a put right back to the company at fair value (common in S-Corp structures or certain LLC profit interest arrangements)
• Awards with repurchase features that could require cash settlement upon termination

The classification analysis is highly fact-specific. Many private company equity plans include repurchase provisions that appear benign in ordinary circumstances but convert the award to a liability under ASC 718 if the repurchase is at the employee's election or if it creates a contingent cash obligation. Repurchase restrictions that lapse with the passage of time — "lapsing repurchase restrictions" — are a particularly common classification trap.

Audit exposure: Misclassification is a restatement-level error if material. If your awards contain any repurchase features, termination provisions, or cash settlement elections, the classification analysis should be documented before year-end — not reconstructed during the audit.

Private Company Accounting Alternatives (ASU 2014-12, ASU 2016-09)

The FASB has issued several accounting alternatives specifically for non-public entities that simplify ASC 718 application. Understanding which elections are available — and whether to make them — is a strategic decision with multi-year implications.

Once adopted, most of these elections apply prospectively and create consistency obligations across future periods. Changing elections triggers a justification requirement and may attract auditor questions. Document the rationale for each election at adoption.

Common ASC 718 Audit Issues for Private Companies

Big 4 and regional auditors have converged on a consistent set of inquiries for private company ASC 718 reviews. Understanding what triggers these inquiries — and pre-building the responses — is the most efficient audit preparation strategy.

Performance Conditions: When the Simplified Method Does Not Apply

Market-based performance conditions — where vesting is tied to a stock price hurdle, an IRR threshold, or a revenue multiple — cannot use the Black-Scholes-Merton model. BSM assumes a single, continuous exercise date; market conditions require a path-dependent model that captures the probability of hitting the condition at each point through the term.

For these awards, the appropriate model is a Monte Carlo simulation or, in simpler structures, a binomial lattice model. The model selection rationale must be documented, and the inputs — including the correlation between stock price and the performance metric, if applicable — must be sourced and justified independently.

This is the most common source of model selection errors in private company ASC 718 engagements. A company with IRR-vesting awards that ran BSM will have a materially incorrect expense calculation — and if the awards are significant, a material misstatement.

The Documentation Standard for Private Company ASC 718

A defensible ASC 718 engagement for a private company produces a self-contained workpaper that an auditor can follow from inputs through to expense without requesting supplemental information. The minimum documentation set includes:

• Grant date schedule: Legal entity, grantee, award type, grant date, exercise price, shares, vesting schedule, and the 409A FMV on each grant date
• Stock price support: Reference to the 409A report, appraiser credentials, effective date, and confirmation that no triggering event has occurred since the appraisal
• Expected term analysis: Simplified method calculation with SAB 14.D.2 citation and award terms source
• Volatility analysis: Peer group selection memorandum with documented screening criteria, individual peer volatilities, outlier treatment, and the conclusion
• Risk-free rate: Source (Federal Reserve H.15, Treasury.gov) and the Treasury yield on the grant date at the maturity matching the expected term
• Model output: BSM or Monte Carlo output with all inputs reconciled back to their source documentation
• Classification analysis: Written analysis of equity vs. liability classification citing the award agreement terms and ASC 718 criteria
• Accounting elections: Summary of all elections made with effective dates and prospective application confirmation