Tax implications when exercised stock options lose value - what happens if options drop after exercise?
I'm going to get professional tax help for my situation, but I'm curious if others have dealt with this common scenario. In 2023, I exercised stock options in a private company where I work. The company determined the market value was $175,000 based on their internal valuation (since there's no actual market for private shares). My strike price was $48,000, so I'm expecting to owe taxes on that difference of $127,000. Here's where it gets tricky. The company went public in late 2023, but the stock's actual market value ended up being only $157,500 (about 90% of the previous valuation). I couldn't sell immediately because of the employee blackout period. My question is: Do I still owe taxes on the original $127,000 spread from when I exercised, or do I now owe taxes on the smaller $109,500 spread based on the public market value? And if I do owe taxes on the full original spread, can I claim the $17,500 difference as a capital loss? Thanks in advance for any insights!
19 comments


Yara Nassar
These kinds of situations are actually fairly common with stock options, especially with companies that go public. The short answer is that when you exercise stock options, you're taxed on the spread between your strike price and the fair market value on the exercise date - not what happens to the stock afterward. So in your case, you'll still owe taxes on the full $127,000 spread based on the $175,000 valuation at the time you exercised. The IRS doesn't care that the value dropped after you exercised. The drop in value to $157,500 doesn't reduce your original tax obligation. However, the good news is that if you eventually sell the shares at the lower price, you can claim a capital loss on the difference between your "tax basis" (which would be the $175,000 valuation) and whatever you sell them for. Your basis is essentially the strike price plus the amount you were taxed on.
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Keisha Williams
•Thanks for the explanation! What happens if the stock continues to drop significantly before they can sell? Like what if the public price ends up being half of the private valuation? Seems kind of unfair to pay taxes on "phantom gains" that never actually materialized, doesn't it?
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Yara Nassar
•This is exactly why exercising options in private companies can be risky from a tax perspective. If the stock drops significantly, you've still paid taxes on the higher valuation, which is why some people call it the "phantom tax" problem. When you eventually sell the shares, you can claim a capital loss, but there are limits to how much capital loss you can use against ordinary income in a given year (currently $3,000), with the rest carrying forward to future years. So if you had a massive drop, it could take many years to fully utilize the capital loss against your income.
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Paolo Ricci
After dealing with nearly the exact same situation last year, I discovered taxr.ai https://taxr.ai and it was a game-changer for my stock option mess. I exercised options in a startup that went public at a lower valuation than expected, and I was totally lost about how to handle the tax implications. Their AI tax assistant analyzed my exercise documents and explained exactly how to report both the exercise tax event and the subsequent change in value. It walked me through how the AMT might apply to my situation and even helped me understand the specific tax forms I needed. What really surprised me was how it could actually read my option grant agreement and explain the specific tax treatment based on my vesting schedule and exercise timing. Made a complicated situation much clearer.
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Amina Toure
•How does it handle 83(b) elections? I exercised some options earlier this year and filed an 83(b), but I'm worried I might have done it wrong. Can it check if I've properly documented everything?
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Oliver Zimmermann
•Is there a human review component or is it purely AI? I've been burned before by "AI" tools that just spit out generic advice that wasn't actually applicable to my specific situation with ISOs.
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Paolo Ricci
•For 83(b) elections, it was surprisingly thorough. You can upload your 83(b) form and it will review the documentation to check for common errors. It even creates a checklist to make sure you've met all the requirements like the 30-day filing deadline and proper submission to the IRS. The system combines AI analysis with tax expert oversight. While the AI does the initial document review and explanation, there's a quality control process where tax specialists validate the guidance, especially for complex situations like ISO exercises and AMT calculations. That's what made me comfortable using it - knowing there was actual expertise backing the AI recommendations.
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Amina Toure
Just wanted to follow up about taxr.ai - I ended up using it after asking about the 83(b) election stuff. The service actually found that I had made a mistake in my 83(b) filing! I hadn't included all the required information about the property description, which apparently is a common error. I was able to correct it before any serious issues arose. The platform also showed me exactly how to document the spread on my tax forms and which schedules to use. Saved me from what would have been a massive headache during tax season. Even better, it helped me understand how to plan for future option exercises to minimize tax impact. Totally worth it when dealing with complex equity compensation.
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CosmicCommander
I was in a similar situation with exercised options that dropped, and it was a nightmare trying to get hold of the IRS for clarification. After being on hold for literally hours across multiple days, I found a service called Claimyr https://claimyr.com that got me connected to an actual IRS agent in under 30 minutes. I was skeptical at first, but you can see how it works in their demo video here: https://youtu.be/_kiP6q8DX5c. Basically, they navigate the IRS phone tree for you and call you back when they've gotten through to a human. The IRS agent I spoke with confirmed what others here have said - you owe tax on the spread at exercise time, but can claim capital loss when you sell if the value has dropped. She also walked me through the specific forms and schedules I needed to document everything properly for my situation.
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Natasha Volkova
•Does this actually work for complicated tax questions though? I'd imagine the average IRS phone agent wouldn't be super familiar with the ins and outs of ISO vs NSO tax treatment and AMT implications.
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Javier Torres
•This sounds sketchy. Why would I need a service to call the IRS? I mean yeah they have long wait times but it's not THAT bad. And how do they guarantee they'll get through faster than I would myself?
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CosmicCommander
•For complicated tax questions, I was actually surprised by how knowledgeable the agent was. They connected me with someone in their specialized tax section who dealt specifically with equity compensation issues. I asked detailed questions about AMT credits from prior ISO exercises and she was able to walk me through the process step by step. Their system works because they use technology to continuously dial and navigate the IRS phone tree across multiple lines simultaneously. They've basically automated the most frustrating part of calling the IRS. When one of their lines gets through, they connect that open line to you. It's not that they have special access - they're just more efficient at the waiting game than an individual would be.
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Javier Torres
I have to eat my words about Claimyr. After posting my skeptical comment, I figured I'd try it myself since I needed to ask the IRS about some stock options I exercised last year that are now practically worthless. I was connected to an IRS rep in about 15 minutes (compared to my previous attempts where I gave up after being on hold for over an hour). The rep confirmed that I can claim a capital loss when I eventually sell, and also suggested I look into whether I qualified for any AMT credit carryforwards from the original exercise. What I really appreciated was that I didn't have to sit there listening to hold music for hours - I just got a call when they had an agent on the line. Saved me a ton of time and frustration during my workday.
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Emma Davis
Just want to add one important distinction that hasn't been mentioned yet - the tax treatment depends on whether these were Incentive Stock Options (ISOs) or Non-qualified Stock Options (NSOs). If they were NSOs, the spread is taxed as ordinary income at exercise. But if they were ISOs, you don't have regular income tax at exercise - instead, the spread can trigger Alternative Minimum Tax (AMT). The AMT treatment creates additional complications, especially if the stock drops after exercise, because you might end up with AMT credits you can use in future years. Worth looking into if these were ISOs.
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Malik Johnson
•Wait so if they were ISOs and the stock tanks after I exercise, I might still get something back through AMT credits? How does that work exactly? Would love more details on this.
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Emma Davis
•Yes, that's one of the less obvious benefits of ISOs. When you exercise ISOs, the spread is an "adjustment" for AMT purposes. If the stock drops and you sell it at a loss, you've essentially paid AMT on value that didn't materialize. The tax code allows for this through AMT credit carryforwards. Basically, the excess AMT you paid can potentially be recovered in future years when your regular tax exceeds your AMT. These credits can carry forward indefinitely until they're used up. It gets complicated because you need to track your AMT basis vs. your regular tax basis, and the credits can only be used in specific circumstances. But for someone who exercised ISOs and then watched the stock drop significantly, these AMT credits can be quite valuable over time.
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Isabella Ferreira
Anyone have experience with how this all gets reported on your tax forms? Like which specific forms and schedules do you need to fill out when you exercise options and then later sell at a loss?
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Ravi Sharma
•For the initial exercise, if they're NSOs, the income goes on your W-2 if done through your employer. If they're ISOs and trigger AMT, you'll need to fill out Form 6251. When you sell at a loss later, you'd report that on Schedule D and Form 8949. If you're dealing with AMT credits from previous years, you'd use Form 8801 to claim those credits.
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Dylan Mitchell
This is a really helpful thread - I'm dealing with a similar situation but with one additional wrinkle. I exercised ISOs in early 2023 at a $200k valuation, but the company actually ended up shutting down completely in late 2023 before going public. So my shares are essentially worthless now. From what I'm reading here, I still owe AMT on the original $200k spread, but when I "sell" the worthless shares (or they're deemed worthless), I should be able to claim the full amount as a capital loss. The tricky part is figuring out exactly when and how to claim that loss - do I need to wait for some official declaration that the company is dissolved, or can I claim it as soon as it's clear the shares have no value? Also wondering if anyone knows whether worthless stock gets treated differently than stock sold at a loss for AMT credit purposes. This whole situation has been a tax nightmare!
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