409A Valuation Providers for Series B Companies: Specialized Needs [2026]

What Changes After Your Series B That Affects Your 409A

Your Series B close triggers a fresh 409A requirement under Treasury Regulations Section 1.409A-1(b)(5)(iv)(B), which treats a priced preferred financing as a material change in circumstances likely to affect fair market value. This is the same rule that invalidated your 409A at Series A. The difference at Series B is that the complexity of what must be re-analyzed is substantially greater.

Several new factors enter the 409A analysis at Series B that did not exist at Series A:

Multi-class preferred waterfall. Your cap table now includes at least two classes of institutional preferred stock — Series A and Series B — each with its own liquidation preference, participation rights, anti-dilution provisions, and conversion ratio. The OPM must correctly sequence the waterfall: which class gets paid first, how much, and whether participation rights cap at some multiple. Getting this wrong materially distorts the common stock value.

Higher absolute enterprise value. Series B companies typically command post-money valuations in the $50-300M range. At higher absolute values, the option pricing model's volatility and time inputs carry more dollar weight. A volatility assumption that is 5 percentage points too high or too low can shift the common stock value by millions. Provider expertise in selecting accurate volatility inputs matters more at Series B than at seed or Series A.

Larger and more seasoned employee base. Your option pool at Series B represents grants to 50-200 employees rather than the 5-20 typical of seed stage. The strike prices on these grants affect the economics of a much larger group of people. Errors in the 409A that produce an artificially low or high strike price carry real consequences for employees who may be planning liquidity around those grants.

Institutional board expectations. Series B lead investors typically include institutional VCs with fiduciary obligations to their own LPs. These board members review the 409A report as part of their oversight of option grants. Reports that are thin, poorly documented, or methodologically questionable will receive scrutiny at the board level that seed or Series A reports typically do not.

Emerging IPO optionality. Some Series B companies are on a trajectory toward an IPO within 3-5 years. This affects the DLOM and the expected time to liquidity assumptions in the valuation. An appraiser who does not consider the range of possible exit scenarios — including an IPO exit — may apply an overly conservative DLOM that undervalues common stock relative to the IRS's expectations for a company at your stage.

Why Series B 409A Valuations Are More Complex Than Earlier Stages

The analytical complexity of a Series B 409A valuation is genuinely greater than seed or Series A — not because more work is done for its own sake, but because the economic reality is more complex. Here is where the additional complexity lives:

Multi-class OPM waterfall. An OPM with two preferred classes requires modeling the distribution of equity value across a sequential waterfall that accounts for each class's liquidation preferences, participation caps, and conversion rights. The appraiser must correctly represent the conditions under which Series A preferred converts to common, when participation caps are hit, and how the remaining value distributes. This is materially more complex than a single-class OPM.

Anti-dilution adjustments. If your Series A investors had broad-based weighted average anti-dilution protection and your Series B financing price was below the Series A price per share (a down round scenario), the anti-dilution adjustment increases the number of shares the Series A converts to on a common stock equivalent basis. This affects the fully diluted share count and therefore the per-share common stock value. Not all providers handle anti-dilution adjustments correctly in their OPM models.

Revenue-based market approach cross-checks. Series B companies typically have meaningful revenue — often $5-30M ARR for SaaS companies — which opens up market-approach cross-checks using revenue multiples from comparable public companies. A thorough Series B 409A should reconcile the OPM backsolve result against a market approach analysis. Providers that only run the OPM backsolve without any cross-check are applying a narrower methodology than the situation warrants.

More complex DLOM analysis. The discount for lack of marketability at Series B requires more nuanced analysis than at seed or Series A. Factors to consider include the company's specific liquidity timeline, any secondary trading that has occurred (which reveals market prices for common stock), and the increasing probability of a near-term IPO if your growth trajectory supports it. Understanding the 409A valuation methodology in depth helps you evaluate whether your provider is applying a DLOM appropriate for your stage.

What to Look for in 409A Valuation Providers for Series B

Selecting the right 409A valuation provider for a Series B company requires evaluating several dimensions that matter more at this stage than at seed or Series A:

Multi-class preferred waterfall modeling. Ask any prospective provider to confirm their OPM model handles multi-class preferred waterfalls — specifically, that they can model Series A and Series B preferred simultaneously with their respective liquidation preferences, participation rights, and conversion conditions. A provider that cannot clearly explain how they model the interaction between preferred classes should not be handling your Series B valuation.

Revenue-based market approach capability. At Series B, a complete 409A methodology should include a market approach cross-check using revenue or EBITDA multiples from comparable public companies. Ask whether the provider's methodology includes this step. Providers that only run the OPM backsolve may produce defensible results, but those that add a market approach cross-check produce more robust documentation.

Credentialed senior appraiser review. The independent appraisal safe harbor under Treasury Regulations Section 1.409A-1(b)(5)(iv) requires a qualified independent appraiser. At Series B, you want to ensure the credentialed appraiser (ASA, ABV, or CVA) is actually reviewing the specific terms of your cap table, not just signing off on an automated analysis. Ask whether the signing appraiser will review your specific Series B financing documents or whether the review is template-based.

Report documentation quality. Series B option grants are approved by a board that includes institutional investors with fiduciary obligations. The 409A report must be detailed enough to document all material inputs, methodology choices, and judgment calls. A report that presents conclusions without supporting analysis does not meet the standard that a Series B board expects. Review a sample report from any prospective provider before engaging.

Audit defensibility track record. Ask prospective providers whether their reports have been subject to IRS examination and what the outcome was. Providers who have successfully defended valuations through IRS audit have demonstrated methodology quality in a way that providers with no audit history cannot. This is not a disqualifier for providers without audit experience, but it is valuable information for Series B companies with institutional investors who care about audit risk. For a detailed framework, see our guide on how to compare 409A valuation providers.

The Best 409A Valuation Providers for Series B Companies in 2026

The following profiles cover the providers best suited for Series B companies. For a broader cross-stage comparison, see our best 409A valuation providers in 2026 overview.

409A Valuation. Handles Series B OPM backsolves with multi-class preferred waterfall modeling. Credentialed appraisers (ASA or ABV) review and sign every report. Expert sign-off is $499 for Series B companies with standard institutional preferred terms. Turnaround is typically 3-7 business days from complete document submission. Best for: Series B companies with two preferred classes and typical institutional terms where the structure is well-documented and the cap table is clean.

Carta. Strong integration for Series B companies managing equity on Carta. The document handoff is seamless for Carta cap table users and the methodology includes OPM backsolves with multi-class preferred support. Pricing for Series B engagements typically ranges from $2,500-$4,500 depending on cap table complexity. Turnaround is typically 1-3 weeks. Best for: Series B companies already managing cap tables on Carta who value platform continuity.

Scalar. Handles Series B OPM backsolves with multi-class preferred support. Pricing for Series B companies typically ranges from $2,500-$5,000. Turnaround is typically 7-14 business days. Scalar has expanded its Series B client base and produced well-documented reports at competitive prices. Best for: Series B companies looking for a mid-tier platform with fast turnaround and institutional-quality documentation.

Kruze Consulting. Kruze has a substantial Series B client base through its accounting practice and produces thorough, well-documented 409A reports. Their appraisers have experience with a wide range of Series B capital structures and institutional preferred terms. Pricing for Series B engagements typically ranges from $4,000-$7,000. Turnaround is typically 7-14 business days. Best for: companies using Kruze for accounting services who want integrated provider relationships across financial functions.

Aranca. A mid-tier valuation firm with a startup focus across Series A through late-stage. Series B engagements at Aranca typically range from $3,000-$6,000. Their methodology is well-documented and includes market approach cross-checks where the company's revenue profile supports it. Turnaround is typically 1-2 weeks. Best for: Series B companies that want a specialized valuation firm with a clear startup focus and multi-class preferred expertise.

Traditional valuation firms (Big Four affiliates, regional boutiques). At Series B, traditional firms become a more relevant consideration — particularly for companies with complex capital structures (anti-dilution adjustments, secondary transactions, warrants with unusual terms) or those with institutional investors who expect a name-brand provider. Pricing typically ranges from $10,000-$25,000. Turnaround runs 3-6 weeks. Best for: Series B companies with investor mandates, highly unusual cap table structures, or an expected IPO within 2-3 years.

Cost Benchmarks for Series B 409A Valuations

Series B 409A valuations cost more than Series A because there is genuinely more analytical work involved. The multi-class preferred waterfall requires modeling two or more preferred classes simultaneously, and the higher absolute enterprise value increases the significance — and therefore the required rigor — of every input assumption.

In 2026, the cost range for a Series B 409A valuation runs from $499 at the low end (software-enabled platforms with credentialed appraiser sign-off) through $3,000-$7,000 at mid-tier specialized firms, to $10,000-$25,000 at traditional valuation firms for complex situations. The median for a standard Series B company with typical institutional preferred terms sits in the $3,000-$6,000 range across the mid-tier market.

As at earlier stages, cost does not equal IRS defensibility. The independent appraisal safe harbor requires credentialed appraiser sign-off, reasonable methodology, and adequate documentation — not a minimum fee. For current pricing benchmarks across all stages, see our 409A valuation cost benchmarks for 2026.

One practical consideration at Series B: the cost of the 409A valuation is small relative to the economic consequences of an error. A $500-$1,000 difference in provider cost is immaterial compared to the exposure created by an option grant made at an artificially low strike price when the IRS later examines your records. Optimize for methodology quality and documentation completeness, not just price.

Timing Your Post-Series B 409A

The timing pressure for a post-Series B 409A is usually greater than at earlier stages because you have more employees waiting for option grants. Series B companies typically close their round in the context of aggressive hiring plans, and new hires often have 90-day cliffs approaching on grants that have not yet been formally issued. Every week without a current 409A is a week those grants cannot be made.

Best practice is to initiate your post-Series B 409A within two to four weeks of close, once the cap table is fully updated. This means waiting until the amended certificate of incorporation reflecting the Series B preferred terms is filed, all existing SAFEs or bridge notes have been converted and reflected in the cap table, and the option pool refresh is complete. Starting before the cap table is final creates rework and delays.

For Series B companies that anticipate frequent grants — large engineering or sales hiring bursts, for example — consider whether your company's cadence warrants pre-negotiating refresh pricing with your chosen provider. Most Series B companies will need at least one renewal within the 12-month validity period of the initial post-B valuation. Understanding how timing and refresh frequency interact with your valuation cost is covered in how fast to refresh your 409A after a funding round.

How 409A Methodology Evolves at Series B

The core methodology for a Series B 409A remains the OPM backsolve — the same general approach used at Series A — but the inputs, complexity, and cross-check requirements evolve meaningfully.

OPM backsolve from Series B price. The appraiser anchors the enterprise value to the Series B preferred financing price and runs the option pricing model to distribute that value across all equity classes in the waterfall. The key technical challenge is correctly modeling the interaction between Series A and Series B preferred terms — their respective liquidation preferences, participation rights, and conversion conditions.

Market approach cross-check. For Series B companies with meaningful revenue, the appraiser should cross-check the OPM backsolve result against a market approach using revenue or ARR multiples from comparable public companies. This cross-check validates that the implied enterprise value from the OPM is consistent with how the market prices comparable businesses. A well-documented Series B 409A report includes both the OPM analysis and the market approach reconciliation.

Volatility inputs. At Series B, the comparable company peer set should reflect your company's actual market position and scale — not just "technology startups" generically. A SaaS company at $10M ARR after a Series B has a different risk profile than a pre-revenue deep-tech company. The appraiser should select peers with similar revenue scale, growth rate, and business model, which typically produces a more accurate volatility estimate. For a deep dive on volatility inputs, see our Black-Scholes volatility inputs guide.

DLOM at Series B. The discount for lack of marketability at Series B typically falls in the 20-30% range, lower than the 25-35% typical at Series A. This reflects a shorter expected holding period (you are closer to a liquidity event), a stronger company profile (demonstrated product-market fit, institutional validation), and potentially the first signals of secondary market interest. If your company has completed secondary transactions at a defined price, that information can serve as a reference point for the DLOM analysis.

Common stock as a percentage of preferred. For a typical Series B, common stock often falls in the 12-28% range of the Series B preferred price per share, depending on the liquidation preferences, participation rights, the DLOM, and the time to expected exit. The ratio continues to compress relative to Series A as the preferred stack grows larger and the liquidation preferences represent more of the total equity value at lower exit prices.

Common Mistakes Series B Companies Make With Their 409A

Using the same provider without re-evaluating fit. The provider that was right for your Series A may not be the right provider for your Series B if their methodology or analytical framework does not scale to handle the additional preferred class complexity. Re-evaluate your provider at each funding stage rather than defaulting to whoever you used before.

Underestimating the waterfall complexity. Some founders assume that adding a Series B preferred class is a simple incremental change to the prior model. In practice, the interaction between Series A and Series B preferred terms — particularly around anti-dilution adjustments and participation stacking — can meaningfully affect the common stock value. Providers who handle this correctly produce different results from those who approximate.

Skipping the market approach cross-check. Series B companies with meaningful revenue have a basis for a market approach cross-check that earlier-stage companies lacked. Accepting a 409A report that only runs the OPM backsolve without any market approach validation, when your revenue scale supports one, means accepting a thinner methodology than your situation warrants.

Not factoring in board approval timelines. Series B boards typically have formal option grant approval processes with scheduled meeting dates and documentation requirements. If your post-Series B 409A is not ready before the first board meeting at which you plan to approve option grants, those grants get delayed. Plan your 409A timeline backwards from the board approval date, not forward from when you feel ready to start.

Granting options before the new 409A is signed. The most serious mistake at any stage — but particularly at Series B given the volume of employees affected — is granting options at the prior strike price after the Series B close. Options granted at a strike price that was set by a pre-Series B 409A are potentially non-compliant under Section 409A, creating deferred compensation tax issues for employees. For a complete explanation of the compliance framework, see our 409A safe harbor guide.

What Documentation Series B Companies Need to Provide

Series B 409A engagements require more documentation than Series A because the capital structure is more complex and the company's operating history is longer. Having these documents ready before initiating the engagement substantially reduces turnaround time:

• Fully updated cap table — reflecting all post-close equity, including the new Series B preferred shares, all remaining Series A preferred, converted notes or SAFEs, the expanded option pool, and any warrants. Export from Carta, Pulley, or Astrella preferred.
• Series B financing documents — the executed stock purchase agreement, the amended and restated certificate of incorporation reflecting Series B preferred terms, investors' rights agreement, and voting agreement.
• Prior preferred financing documents — the Series A stock purchase agreement and certificate of incorporation, so the appraiser can model the complete waterfall. If there were any amendments to Series A terms in connection with the Series B (e.g., anti-dilution adjustments), document those specifically.
• Financial statements — audited or reviewed financials for the most recent fiscal year, plus interim financials for the current period. Series B companies typically have 2-4 years of operating history.
• Revenue and financial projections — a 3-5 year model with revenue, gross margin, and EBITDA. The market approach cross-check uses these projections alongside comparable company revenue multiples.
• Key operating metrics — ARR or run-rate revenue, gross margin, customer count, net revenue retention, and growth rate. For SaaS companies, these metrics drive the comparable company selection in the market approach.
• Prior 409A report — provides context on prior methodology, comparable company selection, and DLOM assumptions for the appraiser to build from.