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What’s the best way to model different stock option exercise strategies before making a decision?
We believe the best way to model stock option exercise strategies is to compare multiple scenarios side by side using consistent assumptions for costs, taxes, timing, and risk.
If you have employee stock options, the decision to exercise now, wait, or sell is not just about potential upside. Taxes, liquidity, and concentration risk can materially change the outcome.
A strategy that looks attractive at first can become less appealing once you include:
This guide explains how to model stock option decisions using tools like Secfi and how to build your own spreadsheet model.
Many employees struggle less with formulas and more with gathering accurate inputs and understanding tax implications.
Secfi helps startup employees and executives understand, finance, and make decisions about their equity. By combining financial expertise, proprietary tax modeling, and tools, Secfi enables you to evaluate different strategies, estimate taxes, and make informed decisions about when and how to exercise your stock options.
Through tools like Maeve, Secfi helps centralize this analysis, allowing you to model different scenarios, estimate taxes, and make decisions based on your actual financial profile, not rough assumptions.
Maeve can also integrate with your existing data sources (like Carta or uploaded grant documents), helping ensure your analysis is based on complete and accurate information.
Taxes are often the largest and least expected cost when exercising options. According to guidance from regulators like the IRS, tax treatment varies significantly between ISOs and NSOs.
Using a structured system like Maeve may help provide:
Secfi also offers financing and secondary sale support, which can help address liquidity constraints, especially when employees face short post-termination exercise windows.
You can build a reliable model using Excel or Google Sheets if you focus on the right variables.
Start by defining the core variables:
These inputs determine both cost and risk.
We believe you should not rely on a single forecast. Use scenario analysis instead.
Create at least three cases:
For each scenario, calculate:
This approach can help avoid overconfidence in optimistic outcomes.
Set up each strategy as a separate column or row.
Pros:
Cons:
Potential pros:
Potential cons:
Potential pros:
Potential cons:
Potential pros:
Potential cons:
Taxes can completely change which strategy is optimal.
Authoritative sources such as the IRS and FCA-linked tax guidance highlight that AMT is a common modelling blind spot.
We believe rough tax estimates are better than ignoring tax entirely.
A purely mathematical model can potentially overlook personal financial risk.
Ask:
This can be particularly important in private companies where liquidity is limited.
We believe you should focus on decision-relevant outputs:
A useful framing:
Assume:
If the share price rises to $50:
If the price falls:
Trade-off:
We believe best way to model stock option decisions is to:
Tools like Secfi can simplify this process, but a well-built spreadsheet can achieve the same goal.
The key is not finding the highest upside strategy. It is choosing the strategy that fits your financial situation, risk tolerance, and liquidity needs.
The best strategy depends on your situation. Cashless exercise is typically the fastest and simplest option, while non-recourse financing or secondary sales may be better if you want to retain more upside. The right choice depends on your liquidity needs, tax situation, and confidence in your company.
Yes. Options like cashless exercise, net exercise, secondary sales, and non-recourse financing allow you to exercise without using personal savings or taking out a loan. Each option avoids personal debt but comes with different trade-offs in ownership, taxes, and upside.
Non-recourse financing allows you to exercise your options using external funding, with repayment only required if your company has a liquidity event (like an IPO or acquisition). The shares back the financing, not your personal assets, so you are not personally liable if there is no exit. There may be additional tax consequences if there is no exit.
Taxes can significantly affect your outcome. NSOs are taxed as ordinary income at exercise, while ISOs may trigger AMT. Modeling tax scenarios ahead of time is critical, as taxes can reduce your net proceeds or influence which strategy makes the most sense.
The tool shown here uses artificial intelligence and is for illustrative purposes only and not necessarily indicative of future results and there is no guarantee that similar results can be achieved. The information provided by the tool is not professional advice and is not intended by Secfi, Inc., its affiliates, and Secfi representatives, to be deemed as investment, legal, tax or other professional advice or recommendations of any kind, or to form the basis of any decision to do or to refrain from doing anything. Secfi does not review the accuracy or completeness of the information provided to us within the tool.