Your 409A Valuation and Your Post-Money Valuation Are Not the Same Number

The Number on Your Term Sheet Is Not What Your Options Are Worth

You close a $3M seed round. The deck says your company is worth $10M post-money. Your team asks what their options are worth. You point to the $10M number.

That is the wrong number.

The options are priced off a completely different valuation. One called a 409A. And that 409A will likely come in somewhere between $2.5M and $3.5M - not $10M.

It is not a mistake. It is not a lowball from the appraiser. It is how the system is supposed to work. But founders who do not understand why the gap exists end up with confused employees, compliance problems, and sometimes IRS penalties that wipe out the equity upside they were trying to create.

This article explains both valuations in plain language - what they measure, why they always differ, and what the difference means for your team and your investors.

What a Post-Money Valuation Is

The post-money valuation is simple math. Take the amount you raised. Divide it by the percentage the investor received. That is your post-money number.

If a VC puts in $1M for 10% of your company, your post-money valuation is $10M. That is it. No complex models. No IRS oversight. No third-party appraiser required.

More precisely, the post-money valuation takes all of the outstanding shares in a startup and multiplies them by the stock price that the VC paid in the most recent round. Say a startup has 10 million shares outstanding and a VC invested at $10 per share. The post-money valuation is $100M.

This number has one primary job: to tell investors how much of the company they own after the deal closes. Ownership percentages shift. Founders and employees get diluted. The company signals something about its direction and future growth.

The post-money valuation is a fundraising metric. It is the number you announce on LinkedIn. Journalists write about it. It has almost nothing to do with what your stock options are worth to your employees.

One important detail: the post-money valuation assumes every single share in the company is worth the same price the VC paid for their preferred stock. That assumption is where everything starts to diverge.

What a 409A Valuation Is

A 409A valuation is a formal appraisal of the fair market value of your company's common stock. It is done by an independent third party. It is required by the IRS under Section 409A of the Internal Revenue Code.

The name comes directly from that section of the tax code, which regulates non-qualified deferred compensation plans - including stock options.

Here is the core job of a 409A: it sets the minimum price at which you can legally issue stock options to employees. That price is called the strike price or exercise price. If an employee's options are priced at or above the 409A value, they get tax-free treatment when the options are granted. If the options are priced below the 409A, the IRS considers that a taxable event - immediately, not when the employee exercises or sells.

The 409A valuation focuses exclusively on common stock. That is the stock your employees and founders hold. It is different from preferred stock, which is what investors buy.

Unlike a post-money valuation, which you can calculate on a napkin, a 409A requires a licensed, independent appraiser. The appraiser uses one or more of three approaches: an income approach based on discounted future cash flows, a market approach benchmarking against comparable companies, or an asset-based approach for pre-revenue companies. The result is a documented report that must hold up to IRS scrutiny.

Why the 409A Is Always Lower Than the Post-Money Valuation

I see this every week - founders staring at two numbers for the same company, wondering why they're so far apart. If both are valuations of the same company, why are they so different?

The short answer: they are not measuring the same thing. The post-money valuation prices preferred stock. The 409A prices common stock. Those are different instruments with very different rights.

The 409A valuation is typically about 25-35% of the post-money valuation. So if VCs pay $10 per share for their preferred stock, the strike price produced by the 409A is likely to land somewhere between $2.50 and $3.50.

Preferred stock and common stock are priced differently for structural reasons.

Preferred Stock Has Special Rights

When investors buy preferred stock, they get privileges that common shareholders do not get. These typically include liquidation preferences, anti-dilution protection, voting rights, and priority in payouts if the company is acquired or winds down.

Liquidation preferences mean investors get paid first in an exit. If a company raises a Series A at a $10M post-money valuation and then raises a Series B that adds $20M in liquidation preferences on top of a $10M Series A preference, common stock receives nothing in any exit below $30M. That makes common stock riskier relative to preferred - and riskier securities are worth less.

The 409A applies discounts to reflect the lack of these rights, lower liquidity, and higher risk associated with common stock. That is why the common stock price in a 409A is usually significantly lower than the preferred price paid by investors, even at exactly the same point in time.

The 409A Does Not Price in Growth Expectations

Investor valuations are forward-looking. VCs pay a premium based on where they think the company is going. They factor in growth potential, not just current numbers. They can use aspirational comparables. Assuming 50-100% year-over-year growth for early-stage companies is standard practice.

A 409A valuation does not work that way. It only focuses on the fair market value of common stock as it stands today, without future projections or negotiation. It uses modest, defensible projections based on historical performance. Higher discount rates apply - around 30-40% for early-stage companies - because common shares carry real risk.

The post-money valuation reflects investors' willingness to pay a premium for control and security. The 409A reflects what the common stock is worth under conservative, IRS-defensible assumptions.

Valuation Methodology Is Structurally Different

The post-money valuation does not use any complex calculation method. Founders can come up with the numbers themselves during a negotiation. It is a fundraising tool. It reflects the founder's belief in the company's potential, which is a perfectly valid thing - but it is not the same as an independent appraisal of fair market value.

The 409A uses cold data alone, without growth expectations or market optimism baked in. It is designed to produce a number the IRS can accept as a floor for option pricing - not a ceiling, not a midpoint, but a defensible low-end estimate.

The Post-Money Calculation Makes a Flawed Assumption

The post-money valuation takes the price the VC paid for preferred shares and applies that price to every share in the company - as if common stock and preferred stock are worth the same. They are not.

That is precisely why the post-money valuation tends to be higher and less conservative than a 409A - it does not account for the differences in economic rights between preferred and common stock.

The 409A fixes that problem. It estimates the value of each class of stock separately, based on those economic rights. The result is a lower overall equity value - not because the company is worth less, but because the math is more accurate.

A Concrete Example

Say a startup just closed a Series B. Total shares outstanding: 10 million. The VC paid $10 per share for their preferred stock. Post-money valuation: $100 million.

Now the startup needs to grant options to new hires. The 409A appraiser comes in. They look at the liquidation preference stack from Series A and Series B. They apply a discount for the lack of liquidity and the subordinate position of common stock. They do not assume 3x revenue growth in their DCF model.

The 409A comes back at $3.00 per share. That is 30% of the preferred stock price - right in the middle of the typical 25-35% range.

So the headline valuation says the company is worth $100 million. But employees receive options with a $3.00 strike price, not a $10.00 strike price. Investors hold preferred stock with liquidation rights and downside protection. Employees hold common stock without either. The prices reflect that.

For the employee, a lower strike price means lower cost to exercise options and more potential upside if the company exits at a high price. For the company, it is the IRS-compliant way to give employees a meaningful stake.

What Happens When You Get This Wrong

Operating without a proper 409A - or using an outdated one - exposes startups and employees to immediate tax liabilities and IRS penalties.

If stock options are granted below fair market value, affected employees face immediate taxation on the difference, plus a 20% additional federal penalty tax, plus interest accruing from the grant date. State income taxes may also apply, adding another 5-15% depending on the employee's state of residence. The tax obligation arrives while employees still hold illiquid, unexercised options - creating severe cash flow pressure on people who have not received any money yet.

There is also a 20% additional tax imposed by IRC Section 409A on the affected income - separate from the employee's regular income tax.

Companies that operate without a valid 409A lose safe harbor protection and may face IRS audits. Investors conducting due diligence will question why the company has not maintained current valuations. In acquisition scenarios, improper option pricing can lead to significant delays - deals have been restructured, postponed, or canceled because of compliance issues with how options were granted.

One scenario plays out more than people expect: a founder grants options to early employees using a post-money valuation as the strike price reference rather than getting a proper 409A. The post-money number is $10M. The correct 409A would have been $2.5M. The IRS later determines the options were issued at a price well below fair market value. Every employee with those options faces back taxes and penalties - on a gain they have not realized and cannot access yet.

The Safe Harbor and Why It Matters

A professionally prepared 409A creates what the IRS calls safe harbor status. This is legal protection embedded in the IRS regulations.

When a 409A valuation is prepared by a qualified independent professional using IRS-recognized methodologies, the IRS cannot challenge that valuation for 12 months unless they can prove it was grossly unreasonable. Without safe harbor, the company must prove its valuation was reasonable. With safe harbor, the IRS must prove it was not.

To qualify, the appraiser must be independent - no financial interest in the company, no involvement in negotiating the funding round. An internal valuation does not qualify. Using the post-money number as a proxy does not qualify. Only a proper independent appraisal gets you safe harbor.

Safe harbor is also valid for 12 months from the measurement date - or until a material event occurs, whichever comes first. A material event resets the clock and requires a new valuation before you can issue more options.

When You Need to Update Your 409A

This is where a lot of founders get into trouble. They get a 409A once and then keep using it.

The rule is straightforward: a 409A valuation must be updated at least every 12 months. But several events require an immediate update regardless of timing.

A priced equity round is the single clearest trigger. It resets your safe harbor clock, invalidates your prior valuation, and introduces new preferred stock classes with rights that directly affect common stock value. Whether you just closed a Series A at $15M pre-money or a Series C at $500M, the mechanics are the same - your old 409A is no longer defensible, and you cannot grant options until you have a new one.

Even if your last 409A was completed three months ago, it cannot be relied upon to set strike prices for options granted after the funding event.

Other material events that require an immediate update: receiving a term sheet for an acquisition or merger, launching a new product that materially changes projections, significant revenue growth or decline, and secondary transactions or liquidity programs involving common or preferred stock.

A common mistake: a company completes a 409A during its Series A, then continues granting options for the next 18 months without an update, despite closing a Series B, growing revenue 3x, and receiving acquisition inquiries. Every option grant made using that stale 409A is non-compliant, creating back-taxes and penalties for employees who may not even know the risk they carry.

Early-stage startups that grant options once a year can usually maintain compliance with a single annual refresh. Growth-stage companies that issue equity more continuously should shift to semi-annual or even quarterly updates.

How Much a 409A Costs and How Long It Takes

One reason founders skip or delay the 409A is the perceived cost. The cost math goes the other way.

The 409A appraisals I see for early-stage startups typically run between $2,500 and $4,000. The IRS penalties for non-compliance - 20% additional tax plus interest, on top of regular income taxes - almost always exceed the cost of the appraisal. The financial penalties often exceed professional valuation costs, making compliance a cost-effective risk management strategy.

AngelList reports that 409A providers charge between $1,200 and $11,000 per valuation, depending on company stage and cap table complexity. For companies with more rounds, more share classes, or unusual terms, the work is more involved and the price reflects it.

Timeline is typically two to four weeks from data submission to final report, depending on company complexity and appraiser workload. Most of that time is the appraiser building the model, selecting comparables, and allocating value across share classes. Simple pre-revenue startups with clean documentation can move faster. Companies with complex cap tables take longer.

If you are planning to grant options, do not start the 409A process after you want to issue the grants. Start it three to four weeks before you need the strike price set. Rushing the process is when errors happen.

What the Post-Money Valuation Gets Used For

Post-money valuation has a specific job.

It is the number investors use to determine their ownership stake after the deal closes. It is calculated by taking the pre-money valuation and adding the capital raised. A $5M raise at a $20M pre-money valuation gives you a $25M post-money valuation. That post-money number determines how much of the company the investor now owns.

Post-money valuations also signal company trajectory to the broader market. They are a recruiting tool, a press narrative, a benchmark for future rounds. Higher post-money valuations are considered a point of pride in startup culture - but there is a downside to inflating them. Too high a post-money valuation can make it difficult to raise a subsequent round if the company cannot grow into that number. A flat round or a down round after an inflated valuation creates morale problems, talent retention problems, and cap table mechanics problems.

The post-money valuation also feeds into the next 409A, indirectly. When a new round closes at a higher preferred stock price, the 409A appraiser uses that transaction as data. An appraiser will likely increase the 409A valuation of a company if it is coming off a large fundraise. This can increase the exercise price of employee stock options - which is why some founders time their 409A before a round closes to lock in a lower strike price for employees.

The Strategy Angle: Timing Your 409A Around Raises

I see this every week - founders treating the 409A as pure compliance. It is also a strategic tool if you understand the timing.

The strike price in your stock options determines how much upside employees get. A $0.50 strike price on stock that eventually sells for $10 creates a $9.50 gain per share. A $2.00 strike price on the same stock creates a $8.00 gain. Over a 10,000-share grant, that is a $15,000 difference in employee wealth.

Some founders run their 409A before a major fundraising announcement - while the company's value is still based on pre-round information - to lock in the lowest defensible strike price for employees. Timing your 409A this way is how you maximize the upside your team walks away with.

After a round closes, you have a narrow window before you need a new 409A to issue any more options. A company should refresh its 409A as soon as possible after a funding round, typically within a few weeks, to ensure new option grants can be issued under an updated fair market value.

If you are in a high-growth phase and granting options frequently, budget for multiple valuations per year. The cost of the appraisals is minor compared to the compliance risk and the talent implications of getting the pricing wrong.

This is also where working with founders who have been through exits is invaluable. One operator found that companies sell more based on their stated category and framing than on what the actual business does - and the same principle applies to valuations. The way you document your business model, your market position, and your growth trajectory in the materials you hand the 409A appraiser affects the output. You are not manipulating anything. You are making sure the appraiser has an accurate picture of what the company is, not a conservative guess based on incomplete information.

The Cap Table Knock-On Effects

The 409A and post-money valuation both affect your cap table in ways that compound over time. Each round of preferred stock adds to the liquidation preference stack, and with each successive round, common stock sits lower in the payout waterfall.

This can increase the discount applied to common stock in each new 409A - meaning post-money valuation and your 409A do not necessarily converge as the company grows. It can widen.

This matters for employee recruiting. When you tell a candidate their options are worth X based on the post-money valuation, you are giving them a misleading number. The honest conversation starts with the 409A strike price, the current preferred stock price, the liquidation preference stack, and what range of exit values would produce a meaningful payout for common shareholders.

That conversation is uncomfortable. It builds trust with employees who understand equity. And increasingly, top engineering and product talent does understand equity - at least enough to ask hard questions.

The SAFE Note Wrinkle

More than 60% of US startups now use SAFE agreements for their initial funding rounds. For smaller raises under $1 million, that figure jumps to 85%. This has created new questions around 409A timing that did not exist a decade ago.

The IRS considers SAFE investments as financing events since they represent future equity claims. Even if the SAFE does not immediately convert to equity, the investment may require a fresh 409A assessment within 30 to 60 days of closing, depending on the size and terms of the SAFE.

The mechanics get complicated because a SAFE has a valuation cap but does not set an actual share price until conversion. That ambiguity does not eliminate the obligation to maintain an accurate 409A. If your SAFE is large enough to be considered a material event - and most seed SAFEs are - you need to reassess whether your current 409A is still defensible before you grant more options.

If you are pre-priced round and operating on SAFEs, work with your valuation provider and legal counsel on the right timing. Do not assume your SAFE-based fundraising is invisible to the compliance requirements.

Six Questions Founders Ask About These Two Valuations

Here is a direct breakdown of the questions that come up most often.

Can I use my post-money valuation as my 409A strike price? No. Post-money valuations reflect preferred stock prices that are not IRS-compliant for setting common stock option strike prices. Using the post-money number as your strike price reference exposes employees to immediate tax penalties.

Why does my 409A come back lower than expected after a big raise? The preferred price from your round is a data input for the 409A, but the appraiser then discounts it to reflect the subordinate position of common stock and the lack of liquidity. Larger raises often add larger liquidation preference stacks, which increase the discount applied to common stock.

What if I just do the 409A myself to save money? You can, but it will not provide safe harbor protection. Without safe harbor, the IRS presumes your valuation was not reasonable, and the burden falls on you to prove otherwise. Given that IRS penalties on non-compliant options can reach 20% additional tax plus interest, the cost of a professional appraisal is almost always worth it.

How long does the 409A stay valid? A 409A valuation is good for 12 months from the measurement date, or until a material event occurs, whichever comes first. A new funding round is a material event. So is a merger inquiry, a major product launch, or a significant change in revenue.

Do investors care about my 409A? They do in due diligence. A history of regular, defensible valuations shows that you are organized and take compliance seriously. Founders who are not vigilant about maintaining up-to-date 409A valuations may raise a red flag to investors. Acquirers, auditors, and the IRS routinely examine option grant dates relative to funding round close dates.

What is the actual dollar cost of getting this wrong? For employees: immediate ordinary income tax on the spread between the grant price and fair market value at the time of grant, plus a 20% additional federal excise tax, plus interest. For the company: IRS examination, potential audit, deal complications in acquisition scenarios, and key team members facing unexpected tax bills.

The Practical Checklist

Here is what to do and when.

Before you issue your first options: get a 409A. Do not issue a single option grant without one. There is no grace period and no practical way to establish a defensible fair market value retroactively once equity has been granted.

After every priced equity round: get a new 409A before you grant any more options. Your old one is no longer valid the moment new preferred shares are issued in an arm's-length transaction.

After a SAFE close: assess with your counsel whether the SAFE qualifies as a material event. In my experience, the seed SAFEs I've seen come across my desk trigger this requirement more often than founders expect.

At minimum once per year: even if nothing material has changed, refresh the 409A before the 12-month window expires. Time your annual refresh to come before your annual option grant cycle, not after.

Before recruiting senior hires with options: make sure your 409A is current and that you can explain the difference between the strike price and the post-money valuation clearly. Sophisticated candidates will ask.

Founders who understand both valuations can explain equity to candidates honestly, manage investor expectations around headline numbers, and avoid the compliance traps that have blindsided otherwise well-run startups. The math is not complicated. The stakes of getting it wrong are.

If you are working through your equity strategy and want outside perspective from operators who have built and sold companies, Learn about Galadon Gold - it is one-on-one coaching from people who have been through these decisions at every stage.