Startup

A Down Round Costs More Than the Lower Valuation Suggests

Raising at a price below the previous round triggers anti dilution provisions, resets employee incentives, and signals something to everyone watching.

↩ Looking BackPart of the 2020 to 2026 retrospective, written in July 2026. The date below marks the 2025 events this piece revisits, not when it was published, so it draws on everything known through mid 2026.
Nathan Xiang·November 30, 2025

The Mechanics

a round down This is financing at a price per share lower than that of the previous round. The company is worth less than what investors had previously agreed

The immediate consequence is ordinary dilution and that is the least part of the cost

What makes a down round expensive is that the lower price activates a contract machine written years before at a time when no one negotiating it expected to need it. The reduced valuation is the event. The cost is everything that the event sets in motion and most of that is invisible in the reported headline

Anti Dilution Provisions

Preferred shareholders usually have anti-dilution protection which adjusts its conversion ratio downward if the shares are subsequently issued at a lower price. They end up with more common shares than anticipated in their original terms

The provision does not give them new money or new shares directly. It changes the price at which their existing preference becomes common and a lower conversion price buys something more common for the same original investment

There are two families and the difference between them is enormous

TypeAdjustmentEffect on founders
Broad-based weighted averagePartial scaled to the size of the new round.mild
Narrow-Based Weighted AveragePartial calculated on a smaller share basisharder
Full ratchetChange the price of all previous shares to the new price.severe

What the Weighted Average Formula Actually Does

The weighted average adjustment is the market standard and its logic is worth understanding because it explains why the standard is the standard

The new conversion price is equal to the old price multiplied by a fraction. The top of the fraction is the shares outstanding before the round plus the number of shares of new money. would I bought at the old price. The bottom is the shares outstanding before the round plus the number of shares that the new money actually bought at the new lower price

Read that fraction again and the design becomes obvious. If the new round is small relative to the company the two sides of the fraction barely differ and the adjustment is almost zero. If the new round is huge the fraction moves up a lot and so does the conversion price. The formula asks how many cheap shares were issued not simply whether any were issued

Weighted average protects against damage caused by a down round. Full ratchet protects against the fact that something happened. The first is proportional to the damage; the second is not proportional to anything

the word wide base refers to which shares enter the count. A broad-based provision uses the count of fully diluted shares including common and option pool. A narrow-based provision uses a smaller basis often the preferred alone. Same formula different denominator and the smaller the basis the larger the adjustment

The Three Formulas on the Same Round

An illustrative company with made-up figures chosen for clean arithmetic. Ten million shares outstanding on a fully diluted basis: six million common shares held by founders and employees two million Series A preferred shares and a two million stock option pool. The Series A investor paid four million dollars at two dollars per share

The company is now raising $2 million at $1 per share and issuing two million new shares. The price has been cut in half

At the old price two million dollars would have bought one million shares. So the broad-based fraction is ten million plus one million more than ten million plus two million which is eleven twelfths. The new conversion price is two dollars multiplied by eleven twelfths or one dollar and eighty-three cents. The Series A investor's four million dollars is now converted into 2,181,818 shares of common stock instead of 2,000,000 a gain of181,818

The narrow-based version runs the same formula only in the preferred model. Two million plus one million more than two million plus two million is three-quarters. The conversion price drops to one dollar fifty and the Series A converts to 2,666,667 shares a gain of 666,667. This is about 3.7 times the broad-based adjustment of the same round

Full Ratchet ignores the formula completely and changes the price of each Series A share to one dollar. Four million dollars for one dollar is 4,000,000 shares a profit of 2,000,000

ProvisionNew conversion priceAdditional shares to Series AFounder and employee participation
None2.00050.00 percent
Broad-based weighted average1.83181,81849.25 percent
Narrow-Based Weighted Average1.50666,66747.37 percent
Full ratchet1.002,000,00042.86 percent

A common claim about bear rounds is that the anti-dilution adjustment costs the founders more than the new money. In these figures that statement is false by the market standard and true only at the extreme. The new money took the founders from sixty percent to fifty percent a loss of ten points. The broad-based adjustment cost 0.75 points more. The full ratchet cost 7.14 points

Therefore it is worth stating the statement precisely rather than repeating it vaguely. The weighted average antidilution is a rounding error next to the round itself. The full ratchet is a different instrument that bears the same name

Why a Small Round Is the Dangerous One

The above comparison underestimates the ratchet because a two million dollar round is real financing. Run the same company through a five hundred thousand dollar round at the same price of one dollar

The new money issues 500,000 shares and takes the founders from sixty percent to 57.14 a loss of 2.86 points. The broad-based adjustment gives the Series A only 48,780 additional shares and costs 0.26 additional points

The full ratchet gives the Series A exactly the same 2,000,000 additional shares that it gave in the two million dollar round because the ratchet does not consult the size of the round at all. Founders drop to 48.00 percent. The adjustment cost 9.14 points versus 2.86 points of the money itself a ratio of 3.2 to one

In the largest round the ratchet was 9.6 times more expensive than the weighted average. In the smallest round it was 34.6 times more expensive. A full ratchet becomes more punitive as funding dwindles which is the opposite of what a struggling founder needs

This is the most important thing to know about the provision. A company that builds a small emergency bridge at a reduced price with a full ratchet can transfer more property than a company that builds four times as much. The trigger is price and the magnitude of the adjustment is set based on the amount of preferences already outstanding

The Employee Problem

Options granted with higher previous valuations are now underwater: the strike price exceeds the current fair value. They are worthless unless the company recovers from the previous level

Take for example an employee who owns 40,000 options traded at two dollars granted when that was the fair value of the stock. After the bearish round an updated valuation puts the stock at fifty cents

If the company recovers a dollar per share doubling the new valuation that subsidy is worth nothing. At two dollars a share a fourfold recovery it is still worth nothing because two dollars is exactly the price. The subsidy only begins to be paid above the price at which it was issued

For the grant to be worth sixty thousand dollars the shares must reach three dollars fifty seven times the current common value. An identical grant awarded today at a strike price of fifty cents reaches the same sixty thousand dollars at two dollars per share a fourfold recovery

For employees who joined during the peak a substantial portion of their compensation has become worthless and the mechanism is invisible to them until someone explains it

Repricing, and Why It Is Not Free

Companies respond with price changes or new subsidies each carrying a cost that the ad rarely mentions

A new subsidy dilutes everyone including employees who already have underwater options so the remedy for one group is a small tax on the other. A price review prevents that dilution but creates an equity problem in the other direction because the employee who joined last month in a fifty-cent strike gets nothing while the employee who joined at the peak sees his strike reduced to match it

Both approaches also set the retention clock in the wrong direction. Repriced options are often accompanied by a new vesting schedule meaning an employee who has already served three years is asked to serve longer to fulfill what he was promised. Some accept it. Some interpret this as evidence that capital was never as strong as the offer letter implied which is a reasonable reading

There is no clear solution here just a choice among unattractive others. The relevant question is not which is fair because none of them are but which keeps the specific people without whom the company cannot rebuild

The Signalling Cost

One drawback is public information within the industry. It complicates hiring as candidates evaluate stock offers based on track record. It complicates upcoming financing because a company that has already been restarted once is easier to restart again. And it can trigger difficult conversations with customers and partners about viability

Whether that signal is fair is a separate question. Between 2021 and 2023 a large number of companies earned valuations that reflected market conditions rather than the quality of the business and subsequent bearish rounds frequently reflected the correction of those conditions rather than any deterioration in the underlying business

The signal is read more clearly by people with less information. An existing investor who has watched the numbers monthly knows whether the reset reflects the market or the company. A candidate weighing an offer or a client signing a three-year contract works solely from the headline

The Alternatives, and Why They Are Often Worse

Companies are working hard to avoid a nominal decline and the tools they use come with their own costs

Structured rounds keep the core valuation stable while giving the new investor multiple liquidation preferences participation or guaranteed returns. The advertised price remains the same and the economics are considerably worse for everyone else

Bridge financing of existing investors delays the decision and if the fundamentals have not changed delays it to a weaker position with less runway and fewer options

Extreme cost reduction Achieving profitability without growth is sometimes exactly the right thing to do and sometimes it destroys the growth that justified the company in the first place

What a Flat Headline Actually Costs

The structured alternative deserves the same arithmetic as anti-dilution provisions because it is chosen much more frequently and modeled much less

A new investor will put up two million dollars. The clean version is priced at one dollar per share against ten million existing shares so the investor takes two million shares and owns 16.67 percent with a standard non-holding preference. The structured version keeps the title at two dollars per share so the same two million dollars buys only one million shares and 9.09 percent but carries a double holding preference: four million dollars is deducted from anyexit and the investor then shares what is left

output valueInvestor cleaning roundInvestor flat and structured.All others structured
20,000,0003,333,3335,454,54514,545,455
48,000,0008,000,0008,000,00040,000,000
100,000,00016,666,66712,727,27387,272,727

The crossover costs exactly forty-eight million dollars. Below this level the structured round pays the investor more than the honest round would have paid; above it less. With an exit of twenty million dollars the flat holder gives the investor an additional $2,121,212 and leaves everyone else with 12.7 percent less than the clean structure would have

Therefore the trade is precise and is not the trade that most founders think they are making. Preserving the topline allows for a worse outcome on every mediocre exit and a better one only in exceptional cases. Since mediocre exits are much more common than exceptional ones the structured round typically costs common shareholders real money in exchange for a valuation that will never be tested

A clean round at a fair price is usually the best outcome. It resets expectations provides new employees with significant capital in a realistic strike and prevents a buildup of preferences that makes future exits impossible to liquidate

The Bottom Line

The lowest valuation is the visible cost of a down round and it's usually not the largest. Weighted average antidilution the market standard costs founders well under one point in a typical round; a full ratchet for a small emergency funding can cost nine because the ratchet completely ignores the size of the round.solution dilutes someone.Structured alternatives preserve the headline figure by worsening the underlying terms on exactly the outcomes that are most likely to occur which is an operation that many companies adopt and few model

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