Tax implications for stock gifts: How to determine cost basis for inherited shares I'm gifting to my child
So I'm in a bit of a tax situation and could use some help figuring out the cost basis stuff. About 5 years ago, my aunt gifted me around 1000 shares of Microsoft that she'd been holding since the early 2000s. At the time she gave them to me, they were worth about $285 per share. I've been holding onto them, but now I'm thinking about gifting a portion of these shares (maybe 250-300) to my daughter who's starting college next year. I know there are rules about cost basis when it comes to gifted stock, but I'm completely confused about how this works in my situation - especially since I'm re-gifting stock that was originally a gift to me. Do I use my aunt's original purchase price as my cost basis? Or the value when I received them? And then what happens when I gift them to my daughter - what will HER cost basis be? I'm trying to understand the tax implications for both of us before I move forward with this. Any help would be greatly appreciated! I don't want to mess this up and create a tax headache for either of us.
21 comments


Tyler Lefleur
This is a great question about a multi-generational gift! When stock is gifted to you, the cost basis generally carries over from the original owner (your aunt). This is called "carryover basis." So your cost basis for those Microsoft shares would be whatever your aunt originally paid for them, not the $285 value when you received them. Now when you gift these shares to your daughter, the same principle applies. Your daughter's cost basis would be the same as yours (which is your aunt's original purchase price). The value at the time you give the shares to your daughter doesn't become the new cost basis. One important exception: if the market value of the stock was LOWER than your aunt's basis when she gifted them to you, there's a special rule for calculating losses. But since Microsoft has generally trended upward, this probably doesn't apply to your situation. Also remember there are annual gift tax exclusion limits ($17,000 for 2024). Gifting 250-300 shares at current values would likely exceed this amount, so you'd need to file a gift tax return (Form 709), though you probably won't owe any actual gift tax unless you've used up your lifetime exemption.
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Madeline Blaze
•So wait, does this mean the daughter could end up paying capital gains tax on decades of growth that happened before OP even owned the stock? That doesn't seem fair. Also, how would the daughter even know what price the aunt paid back in the early 2000s?
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Tyler Lefleur
•Yes, your daughter would indeed be responsible for capital gains on all the growth since your aunt originally purchased the shares. This is exactly how the tax code is designed - to eventually collect tax on the capital gains when the shares are finally sold. Regarding documentation, this is why it's critically important to keep good records of gifted securities. You should have received this information from your aunt when she gifted the shares to you. If you don't have this information, you might need to contact your aunt, her broker, or try to reconstruct the purchase dates and prices through historical stock data. The broker holding the shares may also have some of this information.
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Max Knight
I went through almost the exact same situation with Apple stock and found this online tax service called taxr.ai (https://taxr.ai) that was super helpful with figuring out all this gifted stock stuff. I uploaded my brokerage statements and some old emails from when I received the stocks, and their system sorted through everything and gave me a detailed report on the proper cost basis to use for both myself and when I transferred some to my son. What I really liked is they have this feature where they specifically address multigenerational transfers like yours - where you received stock as a gift and then gift it again. They even helped me document everything properly for future reference so my son won't be confused when he eventually sells some shares. Definitely worth checking out since cost basis for gifted stocks gets complicated fast.
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Emma Swift
•Did they help you figure out how to document this on your taxes? Like do you need to file special forms when you gift stock to family members? I'm thinking about transferring some Nvidia shares to my nephew but the whole process seems confusing.
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Isabella Tucker
•I'm curious - how did they determine the original purchase price if it was from decades ago? My dad gave me some IBM stock years ago and he has no idea what he paid for it in the 80s. Would this service be able to help with that?
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Max Knight
•Yes, they walked me through exactly which forms I needed to complete (Form 709 for the gift tax return) and explained that while I needed to report the gift, I wouldn't actually owe any tax unless I'd already used up my lifetime gift exemption. They also provided documentation templates to give to my son for his future records. For older stocks with unknown purchase prices, they have methods to help reconstruct basis using historical stock data, corporate actions like splits, and dividend reinvestment records. They helped me with a situation where we had limited documentation from the 90s, and they were able to establish a reasonable cost basis that would stand up to IRS scrutiny. They use specialized databases that track historical stock prices and corporate actions.
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Isabella Tucker
I just wanted to follow up after trying taxr.ai for my IBM stock situation I mentioned. It actually worked really well! I uploaded the limited information I had, including the approximate year my dad bought the shares and some old statements he found. The system was able to calculate a defensible cost basis by researching historical IBM prices, accounting for all the stock splits and dividend reinvestments. They even created documentation explaining their methodology that I can keep with my tax records in case of an audit. What surprised me most was how they handled the multi-generational aspect - they clearly outlined what my dad's basis was, what mine is now, and what my children's would be if I decide to gift them shares in the future. Really clarified something I've been confused about for years!
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Jayden Hill
After reading these comments, I realized I had a similar issue when trying to figure out cost basis for stocks my grandfather gave me. I spent WEEKS trying to get through to someone at the IRS who could help me understand the gift tax rules. Constantly on hold, disconnected calls, couldn't get a straight answer. Finally found this service called Claimyr (https://claimyr.com) that got me a callback from the IRS within about 45 minutes. You can see how it works here: https://youtu.be/_kiP6q8DX5c. Instead of waiting on hold forever, they somehow navigate the IRS phone system for you and call you when an actual agent is on the line. The IRS person I spoke with walked me through all the gift tax implications, confirmed what forms I needed, and answered my questions about basis calculation. Honestly didn't think it would work but it saved me hours of frustration. Just sharing since it sounds like several of us are dealing with similar gifting questions that might need IRS clarification.
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LordCommander
•How does this actually work? I don't understand how some random service can make the IRS call you back faster than if you called yourself? Sounds sketchy to me.
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Lucy Lam
•Yeah I'm skeptical. The IRS doesn't prioritize calls from certain numbers or services. They take calls in the order received. This sounds like a scam to get your personal info.
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Jayden Hill
•It doesn't make the IRS prioritize you - it basically automates the hold process. Instead of YOU sitting on hold for 2+ hours, their system does it for you. They use technology to navigate the phone tree and wait in the queue, then when they finally reach a human agent, they connect that agent to your phone. So you're still "in line" the same way, but you don't have to actively wait on hold. The service doesn't actually access any of your tax information. They're just connecting you with the IRS. Once you're connected, you speak directly with the IRS agent and share whatever information you need to share with them. It's basically like having someone else wait on hold for you, then tap you on the shoulder when it's your turn.
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Lucy Lam
I need to apologize for my skeptical comment earlier. I actually tried Claimyr after posting because I've been trying to get through to the IRS about a similar gifted stock situation for weeks. The service actually worked exactly as described. I kept getting disconnected after waiting on hold for an hour+ when trying on my own. With Claimyr, I got a call back in about 40 minutes with an actual IRS agent on the line. They helped clarify that in my situation (similar to OP's), I needed to maintain documentation of the original purchaser's cost basis and acquisition dates. The agent also explained how to handle the gift tax return since my gift exceeded the annual exclusion. I was completely wrong about this being a scam. It legitimately saved me hours of frustration, and I finally got the answers I needed. Sometimes being proven wrong is a good thing!
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Aidan Hudson
One thing nobody has mentioned yet - make sure you check if the original shares were in a UGMA/UTMA account. My parents "gifted" me shares that were technically already mine in a custodial account they controlled until I turned 21. This significantly impacts the cost basis calculation since those aren't technically gifts. Also check if any of the shares come from dividend reinvestment plans (DRIPs) over the years. Each reinvestment creates a new lot with its own cost basis. This could mean your aunt's 1000 shares actually have dozens of different purchase dates and costs that need to be tracked separately.
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Camila Jordan
•Thanks for bringing this up! These definitely weren't from a UGMA/UTMA - they were shares my aunt held in her personal brokerage account. But you make a great point about the dividend reinvestment. I just checked and it looks like she did have DRIP enabled, so there might be multiple lots with different cost bases. I hadn't considered this complexity.
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Aidan Hudson
•Glad that was helpful! If there were DRIPs involved, ask your broker for a complete lot-by-lot breakdown. Each reinvestment creates a separate tax lot with its own acquisition date and cost basis. Some brokers have historical records going back decades. If you can't get the complete history, another approach is to use the first-in, first-out (FIFO) method when you transfer shares to your daughter. This lets you gift the oldest shares with potentially the lowest cost basis, which could be tax-advantageous depending on your overall strategy and your daughter's future plans for the stock.
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Zoe Wang
Has anyone used TurboTax for handling this kind of gifted stock situation? I'm wondering if it walks you through all the basis calculations or if you need something more specialized?
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Connor Richards
•I tried doing this in TurboTax last year and it was a nightmare. It asks for cost basis but doesn't really guide you through the special rules for gifted securities that have been re-gifted. I ended up having to override some calculations and add explanations. Would recommend working with a tax pro who specializes in investments for something this complex.
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Ella rollingthunder87
This is exactly the kind of situation where keeping meticulous records is crucial! I went through something similar with Boeing stock my grandmother left me. One thing I learned the hard way is that you should also consider the timing of when you gift the shares to your daughter. If she's starting college next year, think about her income level - if she's in a lower tax bracket, the capital gains tax rate when she eventually sells could be more favorable (potentially 0% or 15% instead of 20%). However, this could also affect her financial aid eligibility since assets in the student's name are weighted more heavily than parent assets in FAFSA calculations. You might want to consider whether it makes sense to sell some shares yourself first and gift the cash instead, or use a 529 education savings plan transfer. Each approach has different tax implications. Given the complexity with the multi-generational gifting and potential DRIP complications others mentioned, I'd really recommend consulting with a tax professional who specializes in estate and gift planning before moving forward.
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Nia Jackson
•This is really smart advice about timing and the financial aid implications! I hadn't thought about how gifted stock would affect FAFSA calculations differently than parent-held assets. The 529 plan transfer option is interesting too - would that avoid some of the cost basis complications since you'd be contributing cash instead of transferring the actual shares? Also wondering if there are any advantages to setting up the gift as a gradual transfer over multiple years to stay under the annual exclusion limits, especially if the stock continues to appreciate.
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Zoe Papadakis
Great question! As a newcomer to this complex topic, I'm learning a lot from this discussion. One thing I'm wondering about is whether there are any state-level implications to consider in addition to the federal tax rules everyone's discussing? I live in California, which I know has its own gift and inheritance tax rules. Would the cost basis carryover rules work the same way for state taxes, or could there be additional complications when gifting stock across state lines? For example, if your aunt lived in a different state when she originally purchased the Microsoft shares, or if your daughter will be attending college in another state where she might establish residency? Also, since several people mentioned the importance of documentation - is there a specific format or type of documentation that the IRS expects for gifted securities? I want to make sure I'm prepared if I ever find myself in a similar situation with family stock transfers. This thread has been incredibly helpful for understanding how complex these multi-generational transfers can be!
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