For CPAs: How to Evaluate a 409A Provider Your Clients Can Trust

Your recommendation defines your client's audit experience

Your startup clients trust your professional judgment. When they ask for a 409A recommendation, they're not asking for a list of options — they're asking you to solve the problem. The provider you recommend determines whether the audit goes smoothly or whether you spend hours reconciling a report that doesn't include the inputs you need.

The evaluation should focus on what matters to you specifically as the CPA or fractional CFO: dual-purpose compliance (the report must satisfy both IRC §409A↗ for tax and ASC 718↗ for financial reporting), methodology depth appropriate for the client's stage, willingness to engage directly with the audit team, and consistency across annual periods. Per AICPA SSVS No. 1↗, the report must comply with professional standards — verify this in sample reports before recommending.

Four CPA-specific evaluation criteria

1. Does the report include all ASC 718 inputs?

Most 409A reports conclude with a fair market value per common share. For tax compliance, that's sufficient. For ASC 718 financial reporting↗, it's incomplete. Your client's stock-based compensation expense calculation requires the current stock price (from the 409A), expected volatility (which should be derived from the comparable company analysis in the 409A), risk-free rate (from U.S. Treasury yields), expected term (from exercise behavior or SAB 110 simplified method), and expected dividends.

Per FASB ASC 718-10-30-3, all inputs must be documented. If the 409A report doesn't disclose the comparable companies used for volatility, you can't verify whether the volatility assumption in your Black-Scholes model is consistent with the 409A's comparable set. If the risk-free rate in the report differs from what you're using, there's an inconsistency the auditor will question.

The best practice: the 409A report should include a dedicated ASC 718 section with all Black-Scholes inputs documented and sourced. If the provider's sample report doesn't include this, you'll be making assumptions the auditor will question.

2. Will the provider respond directly to the audit team?

This is the criterion that separates adequate providers from excellent ones. When your client's auditor has questions about methodology — comparable company selection, DLOM derivation, allocation method rationale — does the provider engage directly? Or do they consider the engagement complete once the PDF is delivered?

A provider that doesn't support audit inquiries creates a problem that cascades to you. The auditor asks the client. The client doesn't understand the methodology well enough to answer. The client calls you. You don't have the underlying model. You call the provider. The provider charges a per-interaction fee or doesn't respond at all.

Per AICPA standards, the auditor must evaluate the competence of management's specialists — an unresponsive provider undermines that evaluation. The consequences: additional audit procedures (more time, more cost), a request for a supplemental analysis from a different provider, or in extreme cases, the auditor refuses to rely on the valuation entirely. Any of these outcomes costs the client more than the original valuation fee and delays the audit timeline.

Ask directly before recommending: "Will the analyst who prepared the report speak with our auditor? Is audit support included in the fee, or is it additional?" Get the answer in writing.

3. Can they handle your client's growth?

Your client is a pre-seed company with a simple cap table today. In 18 months, they may be a Series B company with three classes of preferred, outstanding SAFEs converting into shadow series, and an international subsidiary. The 409A provider you recommend now should be able to handle that complexity without forcing a provider switch mid-growth.

Evaluate range: does the provider handle both early-stage (asset approach, simple OPM) and growth-stage (backsolve, hybrid allocation, PWERM)? Can they model complex liquidation waterfalls with participating preferred, pay-to-play provisions, and anti-dilution adjustments? If they're built for cookie-cutter seed-stage valuations and can't handle Series B complexity, you'll need to recommend a different provider in two years — and explain to the client why the switch was necessary.

4. Do they offer annual plans with data persistence?

If you manage compliance for multiple startup clients, tracking each client's 409A expiration date adds to an already complex calendar. Annual plans with as-needed refreshes offload this tracking to the 409A provider: the provider notifies the client (and optionally the CPA) before expiration, maintains the client's data so the refresh builds on prior work, and includes refreshes in the annual fee so there's no additional procurement process.

Per Treasury Reg §1.409A-1(b)(5)(iv)(B)↗, the 12-month window is non-negotiable. Automated tracking prevents the most common compliance lapse — and prevents the audit finding that creates the most work for you.

Data persistence matters for another reason: consistency across periods. An auditor reviewing two years of stock-based compensation expense wants to see consistent methodology, consistent comparable sets (with documented changes), and consistent approaches to allocation and DLOM. A provider that retains prior engagement data delivers this continuity naturally. A provider that starts from scratch each year introduces unnecessary variance.

The recommendation that makes your life easier

The ideal 409A referral for a CPA practice is a provider that makes your audit work lighter, not heavier. A report with complete ASC 718 inputs means you're not making assumptions. Direct audit support means you're not playing telephone. Growth-stage capability means you're not switching providers when the client scales. Data persistence and as-needed refreshes mean you're not tracking expiration dates across a portfolio of clients.

Express 409A reports include a dedicated ASC 718 section with all Black-Scholes inputs documented and sourced. Our investment banking team responds directly to auditor inquiries — at no extra charge, for the life of the report. We handle everything from pre-seed to Series B+ complexity. Annual plan clients get persistent data, advance expiration alerts, and as-needed refreshes throughout the year.

When your client's auditor calls with questions, we pick up the phone.

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