Repricing Underwater Stock Options: The 409A Rules, Tax, and Process Founders Need to Know

Repricing underwater stock options is one of the most consequential decisions a startup board makes during a downturn. Done correctly, it restores the retention and incentive value of the option pool and keeps the company competitive for talent. Done carelessly, it creates a trail of tax, accounting, and securities law problems that surface painfully in later diligence. This guide walks through exactly how to reprice underwater stock options under IRC Section 409A, ASC 718, and applicable securities rules -- and what to avoid.

The central rule is simple: repricing an underwater stock option is treated as a new option grant for 409A purposes, which means the new strike price must equal or exceed the current fair market value (FMV) of the common stock on the repricing date. Everything else -- the choice of method, the accounting treatment, the shareholder vote, the tender offer mechanics -- follows from that starting point.

What Are Underwater Stock Options?

A stock option is underwater when the exercise price (often called the strike price) exceeds the current fair market value of the underlying common stock. If a grantee holds options struck at $4.00 per share and the latest 409A-determined strike price of common stock sits at $2.50, the option is underwater by $1.50 per share. The option still has time value -- it can recover if the company grows into and past the original strike -- but it has no immediate intrinsic value and provides little psychological retention leverage in the short run.

Underwater stock options are most often created by one of two events. The first is a down round -- a funding event priced below the prior preferred round, which typically drags the 409A common stock FMV below prior grant strikes. The second is a sustained business decline that drops comparable company multiples or the company's own revenue and projections, producing a lower common stock value at the next scheduled valuation. A 409A valuation after a down round is the most common trigger for repricing discussions, but any significant FMV decline can put a material portion of the option pool underwater.

The consequence for the company is real. Underwater options stop functioning as retention tools. Employees who can walk to a competitor and receive a new grant at the competitor's current FMV have a concrete incentive to leave. Even employees who stay may disengage from the equity program, viewing their options as worthless. For founders managing a sensitive hiring pipeline, a large block of underwater stock options often forces a choice: reprice, grant fresh options on top of the old ones, or accept the retention gap.

Why Companies Reprice Underwater Stock Options

The decision to reprice is a trade between retention value and governance cost. Boards generally consider repricing underwater stock options when the gap between strike and FMV is wide enough that the options no longer function as incentives, when a meaningful percentage of the pool is affected, and when the company cannot simply issue additional grants without exhausting the pool or triggering excessive dilution.

Repricing is generally preferable to supplemental grants when the pool is constrained, when the company has been through a valuation reset that it believes is temporary, and when the alternative is losing key employees. It is generally disfavored when the original grants were recent, when the company has public shareholders who may view the repricing as insulating management from risk, or when the underwater condition reflects a genuine long-term decline in enterprise value rather than a cyclical dip.

Common business triggers include a down round that leaves 40% or more of outstanding options underwater by a meaningful margin, a prolonged secondary market weakness that affects late-stage private company valuations, a leadership transition that requires re-incentivizing the senior team, and competitive pressure from acquirers or peers offering higher current-FMV packages. In each case, the value of the retention signal must be weighed against dilution, accounting expense, and governance scrutiny.

The Three Main Methods of Repricing Underwater Stock Options

Companies generally choose among three repricing methods, each with different tax, accounting, and governance consequences. Choosing the right method depends on the company's stage, the size of the underwater pool, the plan document, and how much incremental compensation expense the company is willing to recognize.

Direct repricing (strike price amendment). The simplest method: the board amends the strike price of the outstanding options to a new, lower price -- generally the current FMV from a fresh 409A. The original options are not cancelled. Only the strike price changes. Direct repricing is fast, requires no employee action, and preserves the original vesting schedule. Under 409A, the amendment is still treated as a new grant because any modification that reduces the exercise price constitutes a material modification under Treas. Reg. § 1.409A-1(b)(5)(v). The new strike must meet the current FMV on the amendment date.

Option exchange / cancel-and-regrant. The company cancels the underwater options and grants replacement options with a new (lower) strike price, often with modified vesting. Option exchange is more flexible than a direct repricing -- the exchange ratio, the new vesting schedule, and the eligible pool can all be tailored. A common approach is a value-for-value exchange, where the grantee receives fewer new options than cancelled, with the exchange ratio calibrated so that the fair value of the new grant roughly matches the fair value of the cancelled grant. Option exchange programs are typically structured as tender offers when the company has more than a handful of affected employees, which means they require an SEC Schedule TO filing (or a Rule 13e-4 issuer tender offer for public companies) and a formal offer window.

Cash-out of underwater options. In some cases, the company buys back underwater options for cash or restricted stock rather than issuing new options. Cash-out is typically used when the company has sufficient liquidity and wants to clear underwater positions without extending the option program. The cash payment is ordinary compensation income to the employee in the year received and is subject to employment tax withholding. For the company, the cash payment is deductible when paid. Cash-out avoids 409A replacement-grant issues but is expensive and generally used sparingly.

The 409A Rules for Repricing Underwater Stock Options

IRC Section 409A governs non-qualified deferred compensation, and stock options are generally excluded from 409A coverage only if they meet a specific set of requirements, including that the exercise price cannot be less than the fair market value of the underlying stock on the grant date. Once a stock option is repriced, the IRS treats the amendment as a new grant for 409A purposes -- and that new grant must itself meet the 409A exclusion requirements, or the option becomes deferred compensation subject to 409A's strict distribution and timing rules. That almost always results in adverse consequences for the grantee.

The practical rule that falls out of this: any repricing -- direct amendment, cancel-and-regrant, or exchange -- must set the new strike price at or above the current FMV of the common stock as of the repricing date. That FMV must be supported by a current 409A valuation. An older 409A that was valid when the original options were granted cannot be used to support the repricing, because the FMV on the repricing date is what matters -- not the FMV when the option was first issued.

For companies that rely on the independent appraisal safe harbor under Treas. Reg. § 1.409A-1(b)(5)(iv)(B), the 409A used to support the new strike must be performed by a qualified appraiser within 12 months of the repricing and must reflect the company's current fair market value -- not a pre-downturn value. A material event between the most recent 409A and the repricing date (for example, a down round, a loss of a major customer, or a significant management change) requires a new 409A before repricing can proceed. See our guide on what counts as a material event for 409A for a detailed framework.

Incentive stock options (ISOs) under IRC Section 422 are subject to additional rules. A repricing is treated as the grant of a new ISO, which means the $100,000 first-exercisable limitation resets for the new grant and the two-year-from-grant ISO holding period starts over from the repricing date. For employees who were close to meeting the ISO holding period on the original grant, a repricing restarts the clock -- which can convert what would have been long-term capital gain into ordinary income if the employee exercises and sells within the new two-year window.

If the new strike is set below the current FMV -- whether by error, stale 409A, or deliberate choice -- the option is a 409A violation from the moment of repricing. The grantee is subject to income inclusion under IRC § 409A in the year the option vests (or, if already vested, the year of repricing), plus a 20% additional federal tax on the amount included, plus an interest penalty at the IRS underpayment rate plus one percentage point calculated from the deferral date. States with conforming 409A statutes (most notably California) apply additional state-level penalties on top. These are among the most expensive common 409A mistakes founders make during downturns.

Tax Consequences of Repricing Underwater Stock Options

For the employee, a direct repricing or option exchange is generally not a taxable event at the moment of repricing, provided the new strike is set at or above FMV. The repriced option is treated as a new option grant, meaning no income is recognized until the option is exercised (for NQSOs) or the shares are sold (for ISOs). The original cost basis and holding period carry through to the new strike only if the company structures the transaction carefully; in most exchange programs, the old option is cancelled entirely and the new option starts with a fresh basis.

For ISOs, the repricing restarts the ISO clock. Under IRC § 422, an ISO requires two years between grant and disposition, and one year between exercise and disposition, for the gain to qualify for favorable long-term capital gain treatment. A repricing creates a new ISO on the repricing date, which means the two-year period starts over. If the employee exercises and sells within two years of the repricing date, the disposition is a disqualifying disposition even if the original option was granted years earlier. The company should disclose this timing consequence in the repricing offer materials.

For NQSOs, the tax treatment at exercise is ordinary income on the spread between FMV and the new (lower) strike, followed by capital gain or loss on disposition. Because the strike is now lower than before, the spread at exercise is typically larger than it would have been under the old strike -- which increases the ordinary income tax charge. This is a feature, not a bug: the point of repricing is to give employees a real path to in-the-money exercise, and tax on realized gains is part of that path.

For the company, no immediate cash tax consequence arises from a direct repricing or option exchange. The compensation deduction at exercise is based on the new (lower) strike, so the company's eventual deduction is larger than it would have been on the unrepriced option. Cash-out programs, by contrast, produce an immediate deductible compensation expense equal to the cash paid.

Accounting Impact Under ASC 718 and the Six-Month-and-One-Day Rule

The accounting treatment of repricing underwater stock options is governed by ASC 718 (formerly FAS 123R), which treats any repricing as a modification of an existing award. A modification requires the company to calculate the incremental fair value of the award -- the difference between (a) the fair value of the modified award immediately after modification and (b) the fair value of the original award immediately before modification -- and recognize that increment as additional compensation expense over the remaining vesting period. For already-vested options, the incremental fair value is expensed immediately at modification.

Fair value is typically determined using a Black-Scholes or binomial option pricing model, with inputs calibrated to the current common stock FMV, the new strike, the remaining contractual life, expected volatility, and the risk-free rate. For private companies, the Black-Scholes inputs must be supported by the current 409A analysis and comparable company data. The mechanics are not complicated, but they require documentation that matches the 409A and the auditor's review.

The six-month-and-one-day rule is an accounting convention that applies specifically to cancel-and-regrant option exchanges. If the company cancels the original option and waits at least six months and one day before granting the replacement option, the cancellation and subsequent grant are accounted for as two separate transactions -- the fair value of the cancelled option is fully expensed at cancellation (to the extent not already expensed), and only the fair value of the new option is recognized going forward. If the cancellation and regrant occur within six months, the two transactions are linked, and the company recognizes the greater of the remaining fair value of the cancelled option or the fair value of the new option.

The practical effect: a six-month-and-one-day gap between cancellation and regrant generally produces a smaller accounting charge than a simultaneous cancel-and-regrant. The trade-off is that the company has no live option program for six months, which is a meaningful retention gap. Companies that use the six-month-and-one-day structure typically communicate the plan carefully to employees to avoid a wave of departures during the dead period. The rule is an accounting convention under ASC 718; it is not a 409A safe harbor, and it does not substitute for the 409A requirement that the new strike be at or above FMV on the regrant date.

Shareholder Approval and Governance Considerations

Most modern equity plans include a repricing restriction -- a provision requiring shareholder approval before any outstanding stock option can be repriced. This provision was added to equity plans in response to pressure from institutional investors and proxy advisors ISS and Glass Lewis, both of which take a skeptical view of repricings done without shareholder approval. Before proceeding with any repricing, counsel should review the plan document, the investor rights agreement, the certificate of incorporation, and any voting agreement provisions.

For public companies, NYSE and Nasdaq listing rules require shareholder approval for material amendments to equity plans, and most exchanges treat a repricing as a material amendment. A proxy solicitation is required, ISS and Glass Lewis will publish voting recommendations, and investor relations materials must explain the business case for the repricing. The governance cost is significant, which is why public-company option exchanges are often accompanied by a tender offer structure that gives shareholders visibility into the terms.

For private companies, the governance picture is more varied. Plans drafted in the last decade often contain explicit anti-repricing language. Older plans may be silent, leaving the board with broader latitude. Even where the plan permits board-only action, companies with institutional investors (Series A and beyond) often have separate contractual obligations in the investor rights agreement or voting agreement -- such as a requirement to obtain consent from a majority of preferred stockholders or from a specific lead investor before modifying outstanding awards. The cleanest path is to read every document, assume shareholder approval is required, and structure the process accordingly.

The Repricing Process: Step-by-Step

A defensible repricing process typically follows a consistent sequence. Each step should be documented, and the company should involve tax counsel, securities counsel, a qualified appraiser, and the external auditor early enough to influence the design.

1. Diagnose the problem. Quantify the underwater option pool -- how many grants, how many shares, what percentage of total outstanding awards, what the average underwater gap is. Identify the specific employee groups affected. This analysis drives the business case and informs the method choice.
2. Review governance documents. Plan document, certificate of incorporation, investor rights agreement, voting agreement, and any listing rules. Identify the approvals required and the consent parties.
3. Order a current 409A valuation. The new strike must be supported by a current FMV determination. A 409A older than 12 months, or any 409A predating a material event, must be refreshed before the repricing. See our guide on 409A valuation and stock options for what goes into a strike-supporting appraisal.
4. Model the accounting and tax impact. Work with the auditor and tax counsel to calculate the incremental ASC 718 charge, the expected pattern of recognition, and the employee-level tax consequences under the chosen method.
5. Draft board approvals and employee communications. Board resolutions, amended award agreements or new grant notices, tender offer materials (if applicable), and a clear employee communication explaining the trade-offs, vesting implications, and tax treatment.
6. Obtain shareholder approval if required. For public companies and most private companies with modern plans, this step is prerequisite to the repricing. Plan the proxy timing and investor relations outreach.
7. Execute and document. Complete the repricing on a single grant date (or on the regrant date for exchanges), issue new award agreements, update the cap table and the equity administration system, and file required SEC or state securities forms.
8. Update ongoing reporting. Incremental compensation expense enters the income statement. Update grant-level records for future 409A, audit, and potential exit diligence.

The common failure mode is compressing this sequence. Boards under pressure to retain key employees sometimes approve a repricing before the 409A is refreshed, before shareholder approval is obtained, or before accounting impact is modeled. Each shortcut creates a specific class of problem -- 409A tax exposure, plan compliance violation, or material adverse audit finding -- that is far more expensive to resolve later than it would have been to do the work correctly up front.

Common Mistakes in Stock Option Repricing

Using a stale 409A. The most expensive error. If the 409A used to support the new strike is older than 12 months, or predates a material event, the entire repricing is exposed to 409A penalty tax. The fix is simple: order a new valuation before the board meeting, not after. Companies that get pushed by a downturn often have a 409A already in flight -- use that one, not the prior-year stale report.

Ignoring plan-level anti-repricing language. Boards sometimes approve repricings on the assumption that they have unilateral authority over the equity program. Most plans drafted since 2010 contain an explicit anti-repricing provision that requires shareholder approval. Ignoring that provision creates a plan compliance violation and can invalidate the repricing as to every affected grant.

Skipping the tender offer filing for an option exchange. When a cancel-and-regrant program is offered to more than a handful of employees, the SEC generally treats it as a tender offer under Rule 13e-4 (for public companies) or Schedule TO (for private companies with exchange programs that trigger registration). Failure to file the appropriate Schedule TO exposes the company to SEC enforcement and creates cleanup work during subsequent financings or an IPO.

Forgetting the ISO reset. Grantees who believed they were past the ISO holding period on their original grant will be surprised to learn the repricing restarts the clock. Disclose this clearly in the repricing offer materials so that employees can plan exercise and sale timing appropriately.

Repricing without modeling the accounting charge. The ASC 718 modification charge can be significant, particularly for direct repricings of deeply underwater awards. Boards that approve a repricing without knowing the incremental compensation expense often face pushback from the CFO, the audit committee, and the external auditor later in the process. Model the charge first.

Missing the six-month-and-one-day window on an exchange. Companies that want the smaller accounting charge associated with the six-month-and-one-day rule occasionally compress the timeline (to five months, or three months) under internal pressure. The accounting result is a larger-than-expected charge in the quarter the exchange closes. Either commit to the full six-month-and-one-day gap or plan for the larger charge -- do not split the difference.

Conclusion

Repricing underwater stock options is a powerful retention tool when executed correctly -- and an expensive mistake when it is not. The two non-negotiable rules are: (1) every repricing is a new grant for 409A purposes, so the new strike must meet current FMV supported by a qualified appraisal on the repricing date, and (2) every repricing interacts with the plan document, the securities laws, the tax code, and the accounting rules at the same time. Skipping any of those interactions creates a specific problem that surfaces later.

The repricing process is sequential: diagnose, review governance, refresh the 409A, model the tax and accounting impact, obtain approvals, execute, and document. Done in that order, a repricing of underwater stock options restores the incentive value of the option program and gives employees a real path to meaningful equity outcomes. Done out of order, it multiplies the problem the board was trying to solve.