Carta vs Scalar for 409A Valuations: Which Fits Your Stage?

Short answer: Choose Carta if your equity data already lives there, your capital structure is straightforward, and you want the 409A to be an annual workflow rather than a project. Choose Scalar if your valuation is genuinely contestable — multiple preferred series with unusual terms, active secondary trading, a cheap stock review ahead of an IPO, or an auditor who has pushed back before — and you are willing to pay advisory rates for a named appraiser who will defend the analysis.

A disclosure before we start: 409a-valuation.com is itself a 409A provider, so we are not a neutral party in this market. We have tried to describe both firms the way their own materials and public pricing signals describe them, and we flag our own approach only once, at the end, clearly labeled. Apply the same skepticism to us that you apply to them.

Carta vs Scalar at a Glance

The table below compares the two providers on the dimensions that change the outcome of a 409A engagement. Published pricing in this market moves constantly and most quotes are scoped to the company, so treat the figures as reported ranges to verify against a live quote rather than list prices.

Which is better, Carta or Scalar, for a 409A valuation?

Neither is better in the abstract. Carta is better when your equity data already sits on the platform, your capital structure is conventional, and you want a repeatable annual refresh. Scalar is better when the valuation is genuinely contestable — unusual preferred terms, secondary trading, an IPO timeline — and you need a named appraiser who will defend the analysis.

The reason the question has no universal answer is that a 409A valuation is two things at once. It is a compliance artifact, and it is a piece of expert analysis. As a compliance artifact it has to exist, be no more than twelve months old at the grant date, be signed by a qualified independent appraiser, and reflect every material event through the valuation date. Carta and Scalar both clear that bar for a company with ordinary facts. As a piece of expert analysis, its quality only becomes visible when someone contests it, and contests are rare at seed and increasingly common as the exit approaches.

So the honest framing of Carta vs Scalar is a question about your own risk profile, not about the two firms. If nobody is going to argue with your fair market value this year, the marginal value of a deeper analysis is close to zero and you should optimize for cost and friction. If somebody probably will — an auditor testing stock compensation expense, an acquirer's diligence team, the SEC staff reviewing an S-1 — the marginal value of a defensible analysis is very high and price becomes a secondary concern.

How Carta and Scalar Differ on Methodology

Both firms work from the same playbook. The AICPA's valuation guide for privately held company equity securities issued as compensation sets out the same three approaches for everyone: income, market and asset. Both firms then allocate the resulting equity value across the capital structure using an option pricing model, a probability-weighted expected return method, a hybrid of the two, or a current value method, and both apply a discount for lack of marketability to arrive at the fair market value of common stock. If you want the mechanics, our guide to the income, market and cost approaches in a 409A valuation walks through each one.

The difference is not which models they know. It is how much judgment gets applied per report, and who applies it. A platform delivering valuations at volume standardizes: a defined intake, a defined model set, a defined review path. That consistency is a genuine strength. It means your Series A valuation is built the same way as the one before it, which makes the year-over-year story easy to explain to an auditor.

An advisory firm optimizes differently. Scalar describes a multi-tiered review system and positions itself around complex instruments: convertible notes, earnouts, SAFEs, performance-based compensation. On a company where the capital structure has genuine ambiguity — participating preferred with an unusual cap, a ratchet that only bites in certain exit ranges, a secondary tender that traded at a price nobody can cleanly interpret — that judgment is what you are paying for. The right allocation model is not obvious, the scenario probabilities are contestable, and a defensible answer requires someone to reason about the terms rather than fit them into a template.

The practical test is simple. Read your own charter. If the liquidation preferences are one times, non-participating, and stack in a conventional order, a standardized option pricing model will handle them and a bespoke engagement will produce a similar answer at several times the cost. If you cannot describe your waterfall in two sentences, you are in advisory territory.

How much does a Scalar 409A valuation cost compared to Carta?

Carta's 409A is commonly reported at roughly $1,500 to $8,000 depending on stage and plan tier, and is frequently bundled into the subscription. Scalar does not publish rates and quotes each engagement; third-party comparisons commonly cite figures from around $5,000 into the $25,000 range for complex growth and late-stage work. Verify both against a current quote.

Those headline numbers hide the structural difference that actually matters. Carta's valuation price is entangled with a platform subscription, so the real question is not what the 409A costs but what the total annual relationship costs and what you would still pay if you moved the valuation elsewhere. Platform plans are themselves priced in the low thousands to well over ten thousand dollars a year by stakeholder count and feature tier, and a valuation that looks inexpensive inside a plan you were buying anyway looks very different if the plan exists mainly to host the valuation.

Scalar's quoted model has the opposite property. The fee is fully visible, and it scales with the work: share classes, scenarios, the number of valuation dates, whether a retrospective analysis is needed. That transparency is useful for budgeting and uncomfortable for a seed-stage company, because an advisory firm's floor price reflects an advisory firm's cost structure regardless of how simple your facts are. Our 2026 409A valuation cost benchmarks put both providers in the context of the wider market.

Three costs are routinely left out of the comparison and are worth asking about explicitly. First, refresh pricing: what does the second and third year cost, and does a financing mid-year trigger a new full-price engagement? Second, audit support: is responding to your auditor's questions included, or billed hourly when it happens? Third, the cost of a material event. A material event between scheduled valuations can force an unplanned refresh, and how each provider prices that unplanned work often matters more than the sticker price on the first report.

Turnaround: Platform Workflow vs Advisory Engagement

Carta's valuation turnaround is typically described in the range of one to three weeks from complete data, with expedited handling available at additional cost. A Scalar engagement is scoped in the engagement letter rather than advertised, and the multi-tier review that makes the report defensible also makes it slower on genuinely complex files.

In practice, the provider is rarely the bottleneck. Most delays come from the company side: a charter amendment that was never filed to the data room, a SAFE nobody mentioned, an option ledger that does not reconcile to the board consents, a financial model the CFO is still rebuilding. Our 409A valuation preparation checklist lists what both providers will ask for, and assembling it before you engage compresses either timeline more than any expedite fee.

Where the two models genuinely diverge is on the unscheduled refresh. When a term sheet lands three weeks before a board meeting and you need a new fair market value before the next grant tranche, a platform with your data already loaded can often move faster than an advisory firm that has to open a new engagement, run conflicts, and schedule reviewer time. Ask both what a mid-cycle refresh actually looks like on their calendar.

Does Carta or Scalar give you better audit defense?

Scalar makes the stronger explicit commitment, stating it will defend its valuation analysis in an IRS audit, in a financial statement audit by a Big Four firm, and before the SEC during an IPO process. Carta includes audit support and its reports are widely accepted by major audit firms. The meaningful difference is scope and billing, so get both in the engagement letter.

"Audit defense" is used loosely in this market and covers at least four distinct things: answering written auditor questions about the report, joining a call with the audit team, producing supplementary analysis the auditor requests, and appearing in an IRS examination or an SEC comment process. Providers that advertise support often include the first and bill for the rest. Ask which of the four are covered, for how long after delivery, and at what rate the uncovered ones run. For what auditors actually test, see our guide to what makes a 409A valuation audit-defensible.

It is worth being precise about what is at stake, because the stakes sit with your employees more than with the company. If a stock option is granted with an exercise price below the fair market value of the underlying stock on the grant date, the option is generally treated as deferred compensation subject to Section 409A. The consequences under Section 409A(a)(1) fall on the option holder: the discounted amount is included in income as it vests, plus an additional 20 percent federal tax, plus a premium interest charge, and certain states impose their own additional tax on top of that. The company faces withholding and reporting obligations and, commonly, pressure to make affected employees whole.

This is why the presumption in Treasury Regulations Section 1.409A-1(b)(5)(iv)(B) matters so much. When a valuation is performed by a qualified independent appraiser, dated no more than 12 months before the grant, and no material change has occurred since, the valuation is presumed reasonable, and the IRS bears the burden of showing it was grossly unreasonable. Both Carta and Scalar structure their reports to support that presumption. Neither can protect a company that grants options after an event the valuation never saw — and our page on the 409A safe harbor covers how the presumption is preserved and lost.

Cap-Table Integration and the Data Handoff

This is the dimension where the two models differ most mechanically and where founders most often underestimate the ongoing cost. A valuation is only as good as the capital structure it is built on, and every 409A starts with the same reconciliation: does the share count in the model tie to the charter, the board consents and the option ledger?

When the appraiser sits inside the platform that holds the ledger, that reconciliation is mostly automatic and mostly invisible. That convenience is real and it repeats every year. When the appraiser is an outside firm, someone on your team exports the cap table, assembles the charter and financing documents, and answers questions about instruments the export did not capture cleanly — most often SAFEs, convertible notes and warrants. It is not difficult work, but it is a recurring internal cost, and errors in it are the most common cause of a valuation that has to be reopened. Our overview of 409A providers with cap-table integrations covers how different providers handle that handoff.

There is also an independence dimension worth naming. Some audit committees prefer that the appraiser be organizationally separate from the platform that administers the equity, on the theory that the party recording the grants should not also be the party valuing them. Others see no conflict, because the appraiser signs an independent opinion regardless of who hosts the data. There is no rule requiring separation, and the independent appraisal presumption does not turn on it. If your auditor has a view, get it before you sign.

When Carta Wins, and When Scalar Wins

Carta is the better answer when: your cap table already lives on Carta and moving it is not on the table; your preferred stack is conventional; your last priced round is recent enough to anchor a backsolve; you need a predictable annual refresh rather than a project; and no auditor has yet pushed back on your stock compensation assumptions. Under those facts you are buying compliance plus convenience, and paying advisory rates for judgment you do not need is the most common overspend in this market.

Scalar is the better answer when: you are at Series C or later; your capital structure contains instruments a template does not handle cleanly; secondary transactions in your common stock are creating price signals you have to interpret; you are inside an IPO window and facing a cheap stock review; or a prior valuation has already drawn a question from an auditor or an acquirer. Under those facts you are buying a defensible expert opinion and a named appraiser who will stand behind it, and the fee is small relative to the exposure. Our guide to pre-IPO 409A valuations covers what changes as the S-1 approaches.

The scenario that should give you pause is the seed or Series A company being quoted advisory rates for a clean cap table. Complexity, not brand, should drive the fee. If the quote is not proportional to the work, ask what specifically about your facts requires it.

The Third Option Neither Comparison Covers

Framing the decision as Carta vs Scalar assumes those are the only two shapes a 409A provider can take: a platform that bundles, or an advisory firm that quotes. A third category has grown up between them — software-enabled independent appraisal, where the analysis is assembled by software and signed by a credentialed independent appraiser who reviews it. The economics resemble the platform model, the signature resembles the advisory model, and the capital structure handling sits in between.

That category is worth evaluating on exactly the same five dimensions used above, and with the same skepticism. Ask who signs, what their credentials are, whether you can see a sample report before paying, how audit questions are handled, and what a refresh costs. Our roundup of the best 409A valuation providers and our full Carta 409A review go deeper on the individual options. Our own disclosure, as promised: 409a-valuation.com sits in that third category.

How to Decide in One Afternoon

You do not need a procurement process. Four questions settle almost every Carta vs Scalar decision:

• Can you describe your liquidation waterfall in two sentences? If yes, standardized modeling is adequate. If no, you need appraiser judgment.
• Who will contest this valuation in the next 18 months? Name them — auditor, acquirer, SEC staff, nobody. If the answer is nobody, buy for cost and friction.
• What does the total annual cost look like, not the report price? Add the subscription, the refresh, the mid-year event and the audit support, then compare.
• Who signs, and what happens when your auditor calls them? Get the appraiser's credentials and the support terms in writing before you sign anything.

The Bottom Line on Carta vs Scalar

Carta vs Scalar is a choice between a workflow and an engagement, and the right answer tracks your complexity rather than your preference. Carta's 409A valuation is the efficient choice for a conventional early- or mid-stage company whose equity data already lives on the platform. Scalar's 409A valuation is the right insurance policy for a company whose numbers are about to be tested by people paid to test them.

The failure mode to avoid is picking on brand recognition rather than on facts: paying advisory rates for a simple cap table, or running a pre-IPO cheap stock analysis through a standardized template because it was already in the subscription. Read your charter, name your likely challenger, price the full year rather than the first report, and confirm who signs. That sequence answers the question for your company more reliably than any comparison table, including ours.

This article is general information about valuation practice and provider selection, not legal, tax or accounting advice, and it is not affiliated with or endorsed by Carta or Scalar. Provider pricing, service terms and turnaround change frequently; the ranges described here are reported market signals as of September 2026 and should be confirmed with a current quote. Whether a particular valuation qualifies for a presumption of reasonableness under Treasury Regulations Section 1.409A-1(b)(5)(iv)(B) depends on the specific facts. Consult your own counsel, tax advisor and auditor about how IRC Section 409A applies to your company's equity grants.