I used to think our 409A was a once-a-year checkbox: get it done, file it away, forget about it for twelve months. Then I watched a friend's startup grant options two weeks after closing a bridge round on a valuation that was already stale, and their auditor flagged it during Series B due diligence. That one mistake cost them a re-grant, a round of unhappy early employees repricing their strike prices, and an awkward board conversation. It's the kind of problem you usually learn about the expensive way.
A 409A valuation sets the fair market value of your common stock, which becomes the strike price for every option you grant. Get it wrong, or let it go stale, and the IRS can hit your option holders with a 20 percent penalty tax on top of ordinary income tax, plus interest. That's not a company problem, it's a problem you're handing directly to the employees you're trying to reward. The annual refresh isn't the only thing that matters. Specific events legally require a new valuation before your existing one's 12-month safe harbor even expires, and most founders don't find out until they're already past the trigger.
Trigger 1: You closed a funding round
This is the big one, and the one founders actually remember. Raising from professional investors is direct evidence of what your company is worth, and the IRS treats it that way. If you price a round at a materially higher valuation than your last 409A, granting options at the old strike price invites scrutiny. Get a refreshed 409A within a few weeks of closing, before your next board meeting approves any grants. Most valuation firms quote 10 to 15 business days for standard turnaround, so don't wait until a grant is already promised to someone.
Trigger 2: You hit, or missed, a material milestone
A launch that meaningfully changes your revenue trajectory, a major enterprise logo, a patent grant, or conversely a missed milestone or a pivot to a new business model, all of these can move fair market value independent of any funding event. Founders often assume only money changes valuation. It doesn't. If your business fundamentally looks different than it did 12 months ago, your last 409A is measuring a company that no longer exists.
Trigger 3: You're 6 to 12 months from a possible exit
Once there's a real possibility of an IPO, acquisition, or merger on the table, the calculus changes. Valuation firms model a probability-weighted expected value across scenarios, and that number moves as your exit timeline gets more concrete. If you're fielding acquisition interest or your board is seriously discussing IPO readiness, don't wait for the annual anniversary. A stale 409A discovered during acquisition due diligence is a credibility problem at the worst possible time.
Trigger 4: New securities hit your cap table
Converting SAFEs, issuing a new class of preferred stock, or restructuring existing instruments all change the waterfall that determines what common stock is actually worth. I learned this the hard way when we converted a batch of SAFEs at our seed round and didn't realize the conversion itself, separate from the round's headline valuation, reset the assumptions our valuation firm had used. Any time your cap table's structure changes, not just its total value, that's worth flagging to whoever runs your valuations.
Trigger 5: Your last valuation is aging and grants are coming up
Technically you have a 12-month safe harbor, but that safe harbor assumes no material changes happened in the window. If you're coming up on a board meeting where you plan to approve new hire grants and your last 409A is already 8 or 9 months old, don't let it ride to the 12-month mark. Ask your valuation provider whether anything in the last few months would move the number. It's a five-minute conversation that can save you a much longer one later.
What getting it wrong actually costs
A standard 409A runs $3,000 to $8,000 for most early-stage companies, sometimes less for a pure common-stock pre-seed structure and more once you've got SAFEs, multiple share classes, or liquidation preferences to model. That fee is trivial next to the alternative: a 20 percent penalty tax on every option holder if the IRS successfully challenges an under-priced grant, plus the cost of telling your team their equity is worth less than they thought because of a timing issue that had nothing to do with them.
The board-meeting checklist
Run through these five questions before every board meeting where compensation comes up:
- Did we close a funding round since the last valuation?
- Did we hit or miss a milestone that changes what the business is worth?
- Are exit conversations, IPO or acquisition, getting more concrete?
- Did new securities, SAFEs converting, a new preferred class, hit the cap table?
- Is our last valuation older than 6 months with grants pending?
A single yes means start the refresh now, not after the meeting. The 10-to-15 business day turnaround means procrastination has a real cost in blocked grants and delayed hires.
Frequently asked questions
How often do I actually need a new 409A?
At minimum every 12 months, but sooner any time one of the five triggers above happens, whichever comes first.
Does a small bridge round or SAFE count as a trigger?
Often yes. Even a modest raise from professional investors is treated as evidence of value, and converting SAFEs changes the cap table structure your last valuation was based on. When in doubt, ask your valuation provider.
What happens if we grant options on a stale valuation by mistake?
You may need to reprice or re-grant the affected options, and holders could owe a 20 percent penalty tax under IRC 409A plus interest if the IRS challenges the strike price. It's fixable, but far cheaper to avoid.
None of this is glamorous, and none of it moves your product forward. But a five-minute checklist before every board meeting is the difference between a routine refresh and an IRS letter your employees never signed up for. Build the habit now, while the fix is still easy.