Do You Need a New 409A After a Bridge or Extension Round?

Scope of this page: it deals only with the 409A valuation bridge round question for bridges and extensions, meaning interim money raised between priced rounds. If you closed a new priced preferred round, our 409A valuation after a funding round guide covers it. If you raised your first money on a SAFE, see our guide to the 409A valuation after a SAFE. This page links to both rather than repeating them.

What Counts as a Bridge or Extension Round

"Bridge" and "extension" are market terms, not legal ones, and companies use them loosely. For 409A purposes, what matters is the instrument and the price, not the label. Most interim financings fall into one of four groups:

• Convertible note bridge. Debt that converts into the next priced round, usually at a discount, often with a valuation cap and accruing interest. Until it converts, it is a creditor claim senior to all equity.
• SAFE bridge. A simple agreement for future equity, with a cap, a discount, or both. It has no maturity date and accrues no interest. Our guide to how SAFE notes affect a 409A covers how they are modeled.
• Preferred extension. More shares of the last preferred series, sold at the same price per share, sometimes as a new sub-series (for example "Series A-1") with the same rights. This is a priced transaction, even if the company calls it a bridge.
• Structured bridge. Notes or preferred with extra protection: warrants, a 1.5x or 2x repayment premium, a senior liquidation preference, or a pay-to-play requirement for existing holders.

A "flat" bridge is one priced at the same terms as the last round: the same per-share price for an extension, or the same cap as the last SAFE. Flat does not mean neutral. Raising more money at last year's price tells the appraiser something about what the company is worth today.

Do you need a new 409A after a bridge round?

Not always. You need a new 409A after a bridge round when the bridge reflects information that may materially affect the company's value. A small flat bridge from existing investors that only extends runway under the current plan often does not. A large bridge, a new lead investor, worse terms than the last round, or a changed plan usually does.

The rule comes from the regulations, not from the size of the check. Treasury Regulations Section 1.409A-1(b)(5)(iv)(B)(1) says a previously calculated value is not reasonable if it fails to reflect information available after the calculation date that may materially affect the value of the company, or if it was calculated as of a date more than 12 months before it is used. A bridge is one more piece of information to test against that standard. Our guide to material events and your 409A covers the standard in general. The rest of this page applies it to bridges.

The stakes are the same as for any stale valuation. If the IRS later concludes that options were granted below fair market value, the options can be treated as deferred compensation that fails Section 409A. The holder, not the company, owes income tax on the vested spread, an additional 20% tax and premium interest. The company also has withholding and reporting exposure. A current valuation from an independent appraiser keeps the presumption of reasonableness described in our 409A safe harbor guide.

Why a Flat or Non-Priced Bridge Is Weaker Price Evidence

A new priced round gives the appraiser a strong data point: an investor paid a specific price for a specific security on a specific date. The appraiser can calibrate an option pricing model to that price and solve for the total equity value, which is the backsolve described in our backsolve method guide. A bridge usually gives much less, for three reasons.

There may be no price at all. A note or SAFE sets a conversion formula, not a price per share. A cap is a ceiling on the conversion price, not what the investor paid for a share of preferred stock. An uncapped SAFE with only a discount gives the appraiser no per-share figure to calibrate to. Even a capped instrument has different rights from the preferred stock it will become, so treating the cap as the preferred price can overstate equity value.

The price may be stale on purpose. A flat extension sells shares at the last round's price, which was negotiated months earlier on different facts. Investors may accept that price because the round is small or because they are already shareholders, not because it is today's value. If the company has missed its plan since the last round, the flat price can be above current value. If the company has grown fast, it can be below.

The buyers may not be at arm's length. Most bridges are funded by existing investors. An insider bridge can be generous, because insiders want to protect a prior investment and avoid marking down their holdings, or harsh, because no one else is offering. Either way, it is weaker evidence of fair market value than an outside lead negotiating a new round. Appraisers usually give an insider-only bridge less weight in the backsolve and lean more on the market approach and the company's own results.

Bridge, Extension or Priced Round: How Each Affects the 409A

The table below summarizes how appraisers typically treat each type of interim financing in a 409A valuation bridge round analysis. It is a starting point; the facts of each deal decide the answer.

Is a bridge round a material event for 409A?

A bridge round is a material event for 409A when its size, terms or reasons change the information the last valuation relied on. Bridges that add substantial cash, bring in a new lead, carry worse terms than the last round, or follow a missed plan usually qualify. A small insider top-up on unchanged terms often does not.

In practice, appraisers and auditors look at a short list of questions to decide whether a 409A valuation bridge round refresh is warranted:

1. Size relative to the company. A bridge that adds a few weeks of runway is different from one that adds a year, or one equal to a large share of the last round.
2. Terms relative to the last round. Same cap or price, a better one, or a worse one. A worse one is the clearest signal.
3. Who is investing. A new outside investor setting terms is new market evidence. Existing holders topping up is weaker evidence.
4. Why the company needs it. A bridge to finish a product launch already in the plan differs from a bridge forced by a failed raise or a lost customer.
5. Time since the last valuation. A bridge nine months after the last 409A is more likely to tip the balance than one two months later.
6. Changes to the plan. New projections, a pivot, layoffs or a revised timeline to the next round all change the inputs, whatever the bridge terms.

No single factor decides the question. Write down the board's conclusion either way. If the board concludes that a bridge is not material and keeps granting under the existing 409A, the minutes should say why: the size, the unchanged terms and the unchanged plan. That record is what an auditor or an acquirer's counsel will ask for later.

How Appraisers Model a Bridge in the 409A

Once a bridge closes, a 409A valuation bridge round update changes the valuation in two places: the balance sheet and the capital structure. The cash raised increases equity value, net of any debt. The new instruments change how that value is divided among the classes, and almost always reduce what is left for common stock.

Convertible notes are debt until they convert. In an option pricing model, a note is usually treated as a senior claim equal to principal plus accrued interest, or as converting into the next round if conversion is expected soon. A bridge note that matures before the next round is likely to close adds risk the appraiser has to address, because the holders could demand repayment. Our convertible notes 409A guide covers the modeling choices in detail.

SAFEs are equity-like. Under the standard post-money SAFE, a holder in a liquidity event receives the greater of the purchase amount or the as-converted amount. In a dissolution, the SAFE ranks behind creditors, on par with preferred stock and ahead of common. Appraisers usually model a SAFE bridge as a separate class with that priority, or as converting into the expected next round.

Preferred extensions are the easiest. The new shares join the existing series, or a sub-series with matching rights, so the appraiser updates the share count and, where appropriate, uses the extension price as a calibration point. For a 409A after extension round from new outside investors at the same price, the backsolve can treat the extension as the most recent transaction in that series. For an insider extension, the appraiser may weight it alongside the original round and the market approach.

Warrants issued with the bridge are another class of claim. A warrant with a nominal exercise price is close to an extra share. A warrant priced at the round price has value only above that price. Both dilute common, so give the appraiser every warrant certificate.

Bridge Terms That Signal a Lower Value

Investors price risk into the terms when they cannot, or will not, price it into the valuation. Even when the headline cap or price is flat, any of the following terms tells the appraiser that the company is worth less than the last round implied:

• A deeper discount than earlier notes or SAFEs, for example 30% where the last instruments had 20%.
• A lower cap than the post-money valuation of the last priced round.
• Warrant coverage, which gives bridge investors extra shares on top of conversion.
• A repayment premium, such as 1.5x or 2x principal on a sale before conversion, which puts a larger claim ahead of common in exit scenarios.
• Senior or super-senior rights, which push the bridge ahead of existing preferred in the waterfall.
• Pay-to-play provisions, which convert non-participating holders into common or a junior class.

When a bridge carries terms like these, it is functionally a down round even if no one calls it that. Our 409A down round guide covers how anti-dilution adjustments and pay-to-play conversions flow through the model. The practical point for the board is simple: order a refresh before the next grant, and expect the common stock value to fall.

Can you grant options during a bridge round?

You can grant options during a bridge round if the existing 409A is less than 12 months old and the board reasonably concludes the bridge does not materially change value. If the terms suggest a lower value or the facts have shifted, pause grants until a new valuation is ready, or confirm the current report still holds.

Pausing grants while the bridge is negotiated is the cautious course, and it costs little if the bridge closes in a few weeks. The harder case is a bridge whose terms point to a lower value. Granting at the old, higher strike price does not create a 409A problem, because options priced above fair market value are not discounted. It does give new hires less upside than they should have, and it may require repricing later. Granting below the old price before a new report supports it does create risk, so wait for the new valuation.

Incentive stock options add one more constraint. Under Section 422, an ISO's exercise price must be at least the fair market value of the stock on the grant date. A grant that fails that test cannot qualify as an ISO; our guide to ISO and NSO strike prices explains the difference. For financial reporting, auditors also review grants made close to any financing under ASC 718, and they will compare the grant-date value with the bridge terms.

Rolling Closes, Tranches and Timing the Refresh

Bridges and extensions rarely close all at once. Notes are often issued to investors over several weeks, and extensions may stay open for months. Some are funded in tranches tied to milestones. That raises a practical question: as of which date should the new 409A be prepared?

• When the terms are fixed but the money is still coming in, a valuation dated after the first material close can model the expected full amount, with the terms the documents already set.
• When a later tranche depends on a milestone, the appraiser treats the second tranche as uncertain and weighs the chance it is funded. Reaching the milestone can itself be a material event.
• When the extension stays open for a long time, later closings at the same price become weaker evidence of current value as time passes, and the 12-month limit keeps running regardless.

A bridge is also often a step toward a priced round. If the next round is expected within a few months, the appraiser should weigh that expectation. If the next round actually closes, that is a new material event, and the conversion of the bridge instruments into preferred stock changes the capital structure again. Our guide on how fast to refresh after a funding round covers that timeline.

What to Give Your Appraiser After a Bridge

A 409A after extension round or bridge is only as good as the documents behind it. Send these along with the usual financials and cap table:

• Every note, SAFE, side letter and warrant issued in the bridge, with signed amounts and dates.
• The investor list, marking which investors were already shareholders.
• Any amendment to the charter, investor rights or voting agreements, including new sub-series.
• The board materials explaining why the company raised the bridge and what it funds.
• Updated projections and runway, and the status of any next-round discussions or term sheets.

The Bottom Line on a 409A Valuation Bridge Round Decision

A bridge or extension is not automatically a reason to order a new 409A, and it is not automatically safe to ignore. The question is the same one Section 409A asks of every new fact: could it materially change what the company is worth? For a 409A valuation bridge round decision, small flat insider bridges on an unchanged plan often pass that test. Large bridges, new leads, worse terms and changed plans usually do not. Before the next grant:

• Compare the bridge terms with the last round: price or cap, discount, warrants, repayment premium and seniority.
• Note who invested and how much runway the bridge adds.
• Record the board's materiality conclusion in the minutes, with the reasons.
• Order a refresh, and pause grants, if the terms are worse or the plan has changed.
• Remember that the 12-month limit on the existing report keeps running.

This article is general information about Section 409A valuations after bridge and extension financings. It is not legal, tax, accounting or valuation advice. Whether a particular financing is a material event depends on the facts; consult tax counsel, your accountants and a qualified valuation professional about your situation.