Series A Funding: How VCs Underwrite the Round in 2026

Series A funding is the first large priced round a startup raises after seed, usually led by a venture fund that sets the price, buys preferred stock, and takes a board seat. From the investor's side, it is the point where a fund stops underwriting a team and a story and starts underwriting a repeatable business with evidence behind it.

The checks are large. Carta's July 2026 benchmarks for software companies put the median Series A at $14.4M raised at an $80M valuation, with about 18 percent dilution, and Carta's Q1 2026 State of Private Markets report shows AI and non-AI companies priced in very different markets.

Definition: Series A funding is a priced preferred stock financing in which a lead venture fund and co-investors buy Series A preferred shares, with a liquidation preference, protective provisions, and board representation, to fund the shift from early traction to scalable growth.

By Series A, the story still matters. It just has to arrive with receipts.

An illustrative worked example: a $150M fund leads a $12M Series A at a $48M pre-money valuation ($60M post-money), buying 20 percent. If two later rounds each dilute it by about 20 percent and it doesn't buy more, its stake falls to about 12.8 percent. A $600M sale then returns about $77M, roughly half the fund on one deal. That return profile helps explain why many companies that look "fine" get passed on.

What Series A funding is for

Cooley GO's guide to financing stages draws the line: seed money is for starting up, while Series A money is for "scaling up," in larger amounts and with considerably more extensive documents that often build on the NVCA's model forms. Cooley GO also notes that Series A investors, usually venture funds, often end up owning about 20 to 40 percent of the company after the financing. In our view, the lead usually takes the largest share of that.

At seed, investors tend to ask whether this team can find a product people want. At Series A, the question often becomes whether the thing they found can be sold repeatedly, by people other than the founders, at a cost that makes sense. The founder-side view of timing and readiness is in when to raise a Series A and the broader startup fundraising guide. This article is about the fund on the other side of the table.

Series A funding benchmarks investors use in 2026

The reference points below come from platform data, investor guides, and a law firm survey. Each varies widely by sector, so treat them as context, not targets.

How we'd read these numbers:

• ARR is a range, not a line. CRV's 2026 guide says a competitive B2B SaaS Series A generally starts at $2M to $5M of ARR and, citing SVB, puts median revenue at Series A at $2.5M in 2025. SaaStr's Jason Lemkin says most SaaS companies raising a Series A have $1M to $2.5M. Faster growth can let a company raise at the lower end.
• Medians hide two markets. In Carta's Q1 2026 report, AI foundational model startups and non-AI startups aren't comparable markets, so compare a deal with its own segment.
• Round health looks good, but uneven. Cooley's Q2 2026 Venture Financing Report, covering 166 deals and $85.7B, found 83.6 percent up rounds, 12.1 percent down rounds, and 4.3 percent flat.

How a fund underwrites a Series A deal

Many Series A memos follow roughly this order, and each step can kill the deal. Founders can see the same structure from their side in our Series A investment memo template.

1. Traction that repeats. Revenue matters less than its shape: growth rate, net revenue retention, sales cycle length, and whether the last ten customers were closed by a founder or a hired rep. CRV treats 100 percent net revenue retention as the baseline and 110 to 120 percent as competitive.
2. Unit economics with a path to margin. Gross margin, payback period on customer acquisition, and contribution margin per customer. The plan doesn't have to be profitable, but investors typically want the numbers trending toward it.
3. Market size that supports a fund-returning outcome. The fund's ownership math needs a realistic exit large enough that its diluted stake returns a meaningful share of the fund, as in the worked example above.
4. Team beyond the founders. Who runs engineering, who runs sales, and what's missing. The Series A money usually funds the hiring plan, so the plan is part of the diligence.
5. Cap table and prior instruments. SAFEs and convertible notes typically convert at the first priced round, which is often the Series A. The lead usually models the post-conversion cap table before pricing, because a heavy SAFE stack can leave founders with far less than the 36 percent median. We tend to read the cap table before the deck for this reason.
6. Ownership, reserves, and price. The lead decides what it needs to own, what it can pay, and what it will hold back for follow-ons, then makes an offer that works on all three.

Research by Gompers, Gornall, Kaplan, and Strebulaev, summarized on the Harvard Law School Forum on Corporate Governance, surveyed almost 900 VCs and found that the management team is the factor firms cite most often, both in selecting deals and in explaining successes and failures. At Series A the weighting shifts toward evidence, but the team question doesn't go away.

"But a good business is a good investment"

Fair challenge. A company heading for a $150M sale is a real business that plenty of investors would be glad to own. Passing can look like arrogance.

But.

A Series A lead is asking whether the company can move the fund. In our example, a $600M exit returns about half of a $150M fund. The same 12.8 percent stake in a $150M exit returns about $19M: a win for the company that barely moves the fund. That math, more than taste, is why many solid companies hear no at Series A.

An investor's Series A diligence checklist

An illustrative checklist before signing a term sheet:

• Pull twelve months of monthly revenue by customer and check concentration.
• Calculate net revenue retention on cohorts at least six months old.
• Talk to five customers, including one who churned or chose a competitor.
• Model the post-conversion cap table with every SAFE, note, and option grant.
• Confirm founder vesting, IP assignment, and a clean Delaware charter.
• Check that the round funds the Series B milestones with buffer, and that the term sheet is on-market: 1x non-participating preference, broad-based weighted average anti-dilution, standard protective provisions.
• Write down what would need to be true for this to return the fund, and the two most likely reasons it fails.

Learning to underwrite a Series A with a working fund

1752vc's Emerging Angels program is an 8-week live program for accredited investors who are new to angel investing, giving them a seat at the table in a working fund's investment process: live diligence calls, deal reviews, monthly Investment Circles, and a private community. Sitting in on those reviews can be a practical way to see how real Series A underwriting decisions get made.

The bottom line

A Series A lead is underwriting three things at once: a business that repeats, a cap table that still motivates the team, and an exit big enough to matter to the fund. Miss any one and a good company can still get a pass.

Growth gets you the meeting.

Fund math gets you the check.

Key takeaways

• Series A funding is the first large priced round, led by a fund that sets the price, buys preferred stock, and takes a board seat.
• Carta's July 2026 software benchmarks put the median Series A at $14.4M raised at an $80M valuation, with about 18 percent dilution, and AI foundational model startups price far above the rest.
• The investor's core question shifts from "can this team find a product" to "can this business grow repeatably on new money," with a B2B SaaS ARR bar of roughly $1M to $5M.
• Commonly cited on-market Series A terms are a 1x non-participating preference (the large majority of deals in Cooley's Q2 2026 data), broad-based weighted average anti-dilution, and standard protective provisions.
• It helps to model the post-conversion cap table before pricing; SAFE stacks and option pool size are often where the real dilution hides.

Frequently asked questions

What is Series A funding?

Series A funding is the first major priced equity round a startup raises after seed, typically led by a venture fund that buys preferred stock with a liquidation preference and takes a board seat. It funds the shift from early traction to repeatable growth, and it uses considerably more extensive legal documents than a seed round.

How much is a typical Series A round in 2026?

Carta's July 2026 benchmarks for software companies put the median Series A at $14.4M raised at an $80M valuation, with about 18 percent dilution. Sector can matter as much as stage: Carta's Q1 2026 report found AI foundational model startups raising Series A rounds near a $300M median valuation, against about $55M for non-AI companies.

How do VCs decide whether to invest in a Series A?

A fund typically checks whether revenue growth repeats, whether retention and unit economics trend in a healthy direction, and whether the market can produce an exit big enough to return a meaningful share of the fund. It then models the post-conversion cap table, the hiring plan the money will fund, and the ownership it needs at the price offered.

How much equity do investors get in a Series A?

Cooley GO notes that Series A investors together often end up with about 20 to 40 percent of the company; the lead usually takes the largest share. Carta's July 2026 data shows median dilution of about 18 percent for the round itself, and its Founder Ownership Report 2026 shows the median founding team holding about 36 percent afterward.

What happens to SAFEs and convertible notes in a Series A?

They usually convert into preferred stock when the company closes its first priced round, which is often the Series A, at a price set by their valuation cap or discount. Because conversions add shares before or alongside the new money, the lead investor models the post-conversion cap table before agreeing on a price.

Sources

• Carta: VC Startup Fundraising Benchmarks From 1000 Rounds (July 2026)
• Carta: State of Private Markets, Q1 2026
• Carta: Founder Ownership Report 2026
• CRV: Series A Metrics VCs Expect in 2026
• SaaStr: What Are the Rough Benchmarks for Raising a Series A?
• Cooley GO: "Friends and Family", Seed and Series A Financings
• Cooley: Q2 2026 Venture Financing Report
• Harvard Law School Forum on Corporate Governance: How Do Venture Capitalists Make Decisions?