409A Valuation, Explained: Reading Your Startup's Vital Signs

A 409A valuation is an independent reading of what one share of your startup’s common stock is worth, and it sets the price your employees pay to exercise their options. It is a different number from the one you pitch to investors, and the sooner you separate the two, the better off you are.

Think of it like the difference between how you describe your own health and what the monitor on the wall actually shows. To investors, you talk up your future the way a patient talks up how strong they feel. To the valuation provider, you sit still while an independent doctor checks your real condition today. It is the same patient producing two very different charts.

Founders run into trouble when they confuse the two readings and get concerned when they differ.

What a 409A valuation actually measures

An ICU doctor doesn’t ask the patient how they feel and write that down. They watch the monitor, which reports heart rate, blood pressure, and oxygen, the hard inputs the body can’t dress up. A valuation provider does something close to that with your common stock.

Your fundraising number is the patient talking. It’s the story you tell in the room, the preferred-share price an investor agrees to because they’re betting on what you’ll become. A little ambition is part of the job.

The 409A is the monitor. An independent provider checks your cash, your revenue, comparable companies, and the rights sitting on top of your preferred shares, then reduces all of it to one solid number for your common stock. The number is current and built to satisfy the government if it ever wants proof.

Both readings are real. The story tells you what someone might pay to bet on this patient recovering. The 409A tells you what plain common stock is worth right now, with no story attached.

Why the two numbers disagree by design

Preferred stock and common stock aren’t the same thing, so they shouldn’t carry the same price.

Investors buy preferred shares, which come loaded with rights. They get paid first if the company sells, and they get terms that protect them when the business turns sideways. Those protections are worth real money, so the preferred price sits higher. Common stock, the kind your team holds through options, has none of that armor and sits at the back of the line.

So when your 409A comes back well under the price you just raised at, that is the method working as designed. The provider is reading common stock as common stock, the way a monitor measures the patient in front of it instead of the patient you wish you had.

Why a low 409A is a healthy sign, not a failure

Here is the part most founders get backwards.

A 409A that comes in lower than your fundraising valuation is not a condition to treat. It is the whole reason you got one in the first place.

A 409A that is lower than your fundraising valuation is not a problem to fix.

The 409A sets the strike price, the amount an employee pays to exercise an option. A low strike means your team buys their stock cheap and keeps more of the spread when the company grows. That’s the gift you hand the engineer you recruited to build the thing.

Push the number high and you do the opposite. A high strike price taxes your own people. Their options cost more to exercise, the bargain gets smaller, and the equity you offered to bring them in gets less attractive. An inflated reading can hand them a taxable surprise on stock they can’t even sell yet. The government doesn’t bill you for that mistake. It bills them.

I watched a founder do exactly this. He’d just closed a strong round, felt invincible, and leaned on his provider to push the 409A up so it “matched the momentum.” Six months later his lead engineer ran the math on exercising, saw the strike price, and the cost killed the whole reason she’d taken below-market salary. The trophy number cost him the person he most wanted to keep.

How the provider reads the number

The 409A comes from inputs you should already be tracking, the same way a doctor builds a diagnosis out of readings rather than guesswork.

The provider starts with the raw inputs, which are your cash position, your revenue, your growth, a multiple from comparable companies, and the terms sitting on your preferred shares. Then they discount the common stock to account for everything it lacks against preferred, plus the simple fact that private startup shares are hard to sell. The result is a value solid enough to hold up under review.

Every one of those inputs lives in your own financials. The founder who already knew their cash, revenue, and cap table cold can read a 409A instead of just receiving it from someone outside. For most founders the 409A looks like a black box only because no one looked inside it.

Frequently asked questions

How often do I need a 409A valuation?

Generally once every twelve months, and sooner after any material event. A new financing round, a strong quarter, or a sharp change in the business can all move the reading. An older valuation that no longer reflects reality stops protecting the grants you make against it, so watch the calendar and the events together, not just the calendar.

Is the 409A the same as my fundraising valuation?

No, and it shouldn’t be. Your fundraising valuation prices preferred stock with all its rights and a story about the future. The 409A prices plain common stock today. The 409A almost always comes in lower, and a real gap between the two is normal and expected.

What happens if my 409A is too high?

A high common-share reading raises the strike price your employees pay to exercise options, reduces their upside, and can trigger a tax bill on stock they haven’t sold. It looks impressive on paper and costs your team in practice. For the number that sets employee option prices, lower is the founder-friendly outcome.

Who actually sets the 409A?

An independent provider, not you and not your investors. That independence is the point. You negotiate and sell the fundraising number. You are not allowed to inflate the 409A, which is the reason it can be trusted.

The bottom line

Your startup is worth two different numbers, and good founders stop fighting that and start using it. The high one tells your story to investors. The low one protects the team you hired to build the company. Chasing a high 409A like it’s a prize is how you tax your own people and weaken the equity you fought to offer.

Both readings come from the same place, which is your cash, your revenue, and your cap table. You should know where the money is going before a provider tells you, not after. That is the whole idea behind CX Cash, where founders centralize the financial reality that feeds every valuation they’ll ever face.

Join CX Cash, grab the investor update template and cap table and dilution calculator, and share this with the founder still treating their 409A as a number to inflate.