The 5 Biggest 409A Mistakes Early-Stage Founders Make

Mistake #1: Granting options before getting a 409A

This is the most common and most dangerous mistake. The founder promises equity to a new hire, puts a strike price in the offer letter based on "what feels right," and issues the grant. No 409A. No independent determination of fair market value.

Under IRC §409A↗, options must be granted at or above FMV — and you can't determine FMV without a valuation. If the strike price turns out to be below the actual FMV, every affected employee faces a 20% penalty tax plus interest. Retroactive valuations are possible (the appraiser produces a report as of a past date using contemporaneous data), but they're more expensive, more complex, and less defensible than getting it right the first time.

The fix is simple: get the 409A before the first grant. Not after. Not concurrently. Before.

Mistake #2: Using the fundraising valuation as the 409A

"We just raised at a $15M valuation — can't we just use that?" No. Your fundraising valuation prices preferred stock. Your 409A prices common stock. These are different securities with different economic rights and different values.

Preferred stock carries liquidation preferences, anti-dilution protections, board representation, and information rights. Common stock has none of these. Under Revenue Ruling 59-60↗, FMV is the price a willing buyer would pay for the specific security being valued — and a willing buyer discounts common stock relative to preferred. Using the preferred price as your strike price means you're overpricing the options, which means higher strike prices for employees and less upside. And if you go the other direction — using a discount off the preferred price without a formal 409A — you have no safe harbor protection.

The VC valuation is an input to the 409A (it anchors the backsolve), not a substitute for it. (See Why Your 409A Is Always Lower Than Your VC Valuation for the full explanation.)

Mistake #3: Letting the 409A expire without noticing

The 12-month safe harbor window under Treasury Reg §1.409A-1(b)(5)(iv)(B)↗ is absolute. There is no grace period. No "substantially compliant" exception. After 12 months from the valuation date — not the report date, not the date you received it — every new grant lacks safe harbor protection.

This mistake happens silently. Nobody puts the expiration date on the calendar. The company keeps granting options at the old strike price. Three months later, during a fundraise, investor counsel asks for the 409A supporting the recent grants and discovers the gap.

The fix: track the valuation date and initiate a refresh 30 days before expiration. Better yet, use a provider whose annual plan includes advance alerts so you never have to track it yourself. (See Your 409A Expires in 30 Days for the full playbook.)

Mistake #4: Using an unqualified or non-independent appraiser

The IRS requires the appraiser to be independent (no financial interest in the company) and qualified ("significant knowledge, experience, education, and training" per Treasury Reg §1.409A-1(b)(5)(iv)(C)↗). Two common failures:

A board member or advisor does it. The CFO, a board member with finance experience, or an advisor who happens to be a CPA produces a valuation. Even if the analysis is competent, the appraiser isn't independent — they have a relationship with the company that compromises objectivity. The valuation doesn't qualify for safe harbor under the Independent Appraisal Presumption.

An automated platform generates it with no named human. The report is produced algorithmically. No individual appraiser reviews the specific engagement. No one signs the report as the responsible professional. In Estate of Hoensheid v. Commissioner (T.C. Memo 2023-34), the Tax Court examined the signed report requirement. A report that can't identify who performed the analysis and who stands behind the conclusion has a safe harbor vulnerability.

The fix: use a provider where you can identify the named appraiser, verify their credentials, and confirm their independence. Ask before you engage: "Who signs the report?"

Mistake #5: Not getting board approval after the 409A

The 409A establishes the FMV. The board resolution is what formally adopts it. Without board approval, the grants may lack proper corporate authorization — a governance deficiency under Delaware General Corporation Law §157↗ (or the equivalent in your state of incorporation).

This mistake is pervasive because cap table software doesn't enforce it. You can create grants in Carta or Pulley without uploading a board resolution. The software tracks the grant; the resolution authorizes it. They're different steps — and most first-time founders don't realize the second step exists until investor counsel asks for it during a fundraise.

The fix: include a board resolution in every 409A engagement. When the FMV is delivered, the board consent should reference the report, state the concluded value, and authorize specific grants. This should be a package — valuation, resolution, and strike-price schedule — not separate workstreams.

Express 409A prevents all five

We deliver the 409A in 48 hours (no delay in compliance — Mistake #1 eliminated). Our report is clearly distinguished from your VC valuation (Mistake #2 clarified). Annual plan subscribers get advance expiration alerts and as-needed refreshes (Mistake #3 prevented). Every report is signed by a qualified, independent appraiser with investment banking credentials (Mistake #4 impossible). Every engagement includes a board resolution draft (Mistake #5 handled).

Five mistakes. Five solutions. One engagement.