How Is a 409A Valuation Calculated?

A 409A valuation calculates the fair market value of your common stock for option pricing. For early-stage startups, that usually means an option pricing model backsolve to your most recent financing, then a cross-check against guideline public companies.

How does the backsolve work?

The OPM backsolve starts from a recent priced round or other market transaction. It works backward through the capital structure to estimate what common stock is worth after preferred rights and the option pool. A GPC cross-check compares that result to public-company multiples so the conclusion is not resting on one input alone.

409A.io uses an OPM backsolve to the most recent financing with a GPC cross-check. Reports are prepared in accordance with AICPA guidelines for privately-held equity issued as compensation. Same methodology used by firms charging $3,000 to $5,000. Typical firms charge $3,000 to $5,000 and take 2 to 4 weeks. Big Four firms often charge $8,000+ and take 4 to 8 weeks.

This is not legal, tax, or accounting advice. The 409A supports safe harbor as a presumption that the valuation is reasonable unless shown to be grossly unreasonable. It is not a guarantee of IRS acceptance or audit outcomes.

What documents feed the calculation?

You need a current cap table, recent financing documents, and the other items on the intake checklist. Cap table upload takes under 5 minutes. CSV is supported. Subscribe at get-started at $99/month on a 12-month term, billed monthly. Complete the short onboarding form and upload your documents.

409A.io delivers an audit-ready report within 48 hours of receiving your documents. Every report is reviewed by a valuation professional from the MELD team before delivery. Direct auditor support is included. We answer auditor questions about methodology and conclusions.

409A.io was spun out of MELD Valuation. MELD has completed 10,000+ valuations across 20+ industry sectors, valued $250B+ in assets, and has zero audit issues across its history. The team brings 16 years of valuation experience. Built for pre-seed through Series A.

When does this apply?

You need a current FMV before granting options, and you should refresh at least every 12 months or after a material event such as a new financing round. A mid-year raise is a material event. Send updated documents and we issue an updated report. Updates upon request and material-event coverage are included during your term.

One plan covers the initial report, updates, material-event coverage, and auditor support. Everything is included at $99/month on a 12-month term. You pay first at get-started, then complete onboarding.

Standard SAFEs and simple convertible notes are in scope. If your structure later includes non-standard instruments, structured equity, or complex waterfalls, graduate to MELD, or tell us your situation and we will point you the right way. Same team either path. We also work with leading cap table providers and offer preferred pricing through those relationships.

What is the next step?

Subscribe at get-started, upload your documents, and get the audit-ready report within 48 hours once we have them. Then you have a calculated common-stock FMV for option pricing.

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