Tax implications for receiving a large international wire transfer from property sale overseas into US bank account

Thanks for your detailed response! A couple of follow-up questions if you don't mind: How do I determine the basis if I don't know what my relative paid for it originally? The property was purchased decades ago and I don't have those records. Also, would I need to file any specific forms with my tax return beyond just reporting the capital gain?

If you don't have records of the original purchase price, you'll need to make a good faith effort to determine the fair market value when you received it as a gift. You could consult with real estate professionals in that area who might have historical data, or check if there's a property tax valuation from that time. If it's truly impossible to determine, document your attempts to find this information. You'll need to report this on Form 8949 and Schedule D with your tax return. Since it involves a foreign transaction over $10,000, you might also need to file FinCEN Form 114 (FBAR) if you had the funds in your foreign account at any point, and possibly Form 8938 depending on the total value of your foreign assets.

I'm curious - did it help with figuring out the basis for your property? That's what I'm struggling with for a similar situation. Also, did it help with the FBAR stuff? I'm confused about whether I need to report my foreign account if money just passed through it briefly.

Did you end up having to pay extra for any tax preparation after using the service? I'm wondering if this is just analysis or if they actually help with filing. Been struggling to find a tax professional who understands international property sales without charging an arm and a leg.

It absolutely helped with determining the basis. I uploaded the limited documentation I had, and it provided guidance on reasonable estimation methods when exact records weren't available. It explained how to document my good faith efforts to establish basis, which is important if you ever get questioned. For FBAR requirements, it clarified that any account that held over $10,000 at any point during the year needs to be reported, even if just briefly. It also explained the lookback period for filing any missed FBARs from previous years if applicable.

How does this Claimyr thing work exactly? I've been on hold with my bank for literally hours trying to sort out a similar issue. Do they just call on your behalf or something? Seems too good to be true that they can get through when regular customers can't.

This sounds like a scam. Why would some random service have better access to banks than customers? And why would banks even accept calls from a third party about your account? Sounds like you're just paying someone to do what you could do yourself with enough patience.

It's not that they call on your behalf - they have a system that navigates the phone tree and waits on hold until they reach a human representative. Then they connect you directly to that person. You're still the one talking to the bank, they just handle the waiting part. I was skeptical too but after spending 5+ hours over multiple days trying to resolve my issue without success, I was desperate. The service basically handles the frustrating part (waiting on hold and navigating phone menus) and then calls you when they've reached a human. You still handle your own banking business and verify your identity as normal.

Thanks for bringing up Form 3520 - would that apply to a property sale though? I thought that was specifically for gifts and inheritances from foreign persons, not for selling property I already own. And good point about state taxes, I'm in Florida so I believe there's no state income tax to worry about.

You're right about Form 3520 - if it's clearly a property sale transaction, it wouldn't be considered a foreign gift. I mentioned it because sometimes the lines get blurry, especially with family-related transactions or if part of the value could be considered a gift. Since your situation is straightforward (selling property you received as a gift in the past), Form 3520 shouldn't apply. Florida is indeed one of the states with no income tax, so you're in luck there! You'll only need to handle the federal capital gains tax and any potential foreign country taxes, depending on tax treaties between the US and that country.

This is so important! I sold property in Mexico and had no idea I'd have to pay their capital gains tax first. The notary handling the sale actually withheld it automatically (around 25% of the gain). It was a surprise but at least it qualified for the foreign tax credit in the US.

This is excellent advice about the NIIT - I hadn't even considered that additional 3.8% tax! Given that my property sale could put me right at or above those thresholds, this could be a significant additional cost I need to factor in. The tip about notifying the bank in advance is really smart too. I can imagine how a large unexpected international wire could look suspicious from their perspective, even though it's completely legitimate. I'll definitely call them before the transfer happens to give them a heads up. The separate savings account idea is brilliant - with the time gap between receiving the money and actually paying taxes, I might as well earn some interest on funds that are earmarked for the IRS. Do you have any recommendations for high-yield savings accounts that would be good for this kind of short-term tax savings? I want something that's FDIC insured and easily accessible but with decent rates. One more question - you mentioned quarterly estimated taxes. Since this will likely be my only major capital gain this year and I normally just get W-2 income, would I need to start making quarterly payments, or could I just pay it all when I file my return next year?

Great questions! For high-yield savings accounts, I'd recommend looking at online banks like Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're currently offering rates around 4-5% APY, are FDIC insured, and have easy online access. Just make sure there are no minimum balance requirements or withdrawal restrictions that could complicate accessing your tax money when needed. Regarding quarterly estimated taxes - since you'll likely owe more than $1,000 in additional tax from this capital gain, the IRS generally expects quarterly payments. However, there's a safe harbor rule: if you pay at least 100% of last year's total tax liability (110% if your prior year AGI was over $150k) through withholding and estimated payments, you won't face underpayment penalties even if you owe more at filing. If your regular W-2 withholding already covers your normal tax liability, you might be able to increase your withholding for the rest of the year instead of making quarterly payments. Talk to your payroll department about having additional federal taxes withheld from your remaining paychecks this year - this can be simpler than calculating and sending quarterly payments. The key is making sure you don't get hit with underpayment penalties, which can add up quickly on a large tax bill. A tax professional can help you run the numbers to determine the best approach for your specific situation.

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates around 4-5% currently and are all FDIC insured. Since you'll need the money within a year for taxes, avoid anything with penalties for early withdrawal. Regarding quarterly estimated taxes - this is really important! If the tax you'll owe on this capital gain is more than $1,000, the IRS generally requires you to make estimated quarterly payments to avoid underpayment penalties. Since you're looking at potentially $24k-36k in capital gains tax (15-20% of your proceeds), plus possibly the 3.8% NIIT, you'll almost certainly need to start making quarterly payments. The safe harbor rule is that you need to pay either 90% of this year's tax liability OR 100% of last year's tax liability (110% if your prior year AGI was over $150k) through withholding and estimated payments. Since this gain will likely far exceed your normal W-2 withholding, I'd strongly recommend making estimated payments starting with the quarter when you receive the funds. You can calculate and pay estimated taxes online through EFTPS.gov or mail Form 1040ES. Don't wait until next April - the underpayment penalties can add up quickly on large amounts!

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and currently offering rates around 4-5%. Marcus tends to have competitive rates with no minimums, while Ally has good customer service. Just make sure whatever you choose doesn't have withdrawal restrictions since you'll need access for tax payments. Regarding quarterly estimated taxes - yes, you'll likely need to start making them! The IRS requires estimated payments if you'll owe more than $1,000 when you file your return. With a capital gain of $120k-180k, you're definitely looking at owing more than that. The penalty for not making quarterly payments can be significant, even if you pay everything when you file. You should make your first estimated payment by the quarter after you receive the funds. So if you get the money in Q2, your first payment would be due July 15th. The IRS generally wants you to pay 90% of your current year tax liability OR 100% of last year's tax liability (110% if your prior year AGI was over $150k) through withholdings and estimated payments to avoid penalties. I'd definitely run the numbers or consult a tax pro to calculate exactly how much you should pay quarterly. Better to slightly overpay than deal with underpayment penalties!

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and currently offering rates around 4-5%. These are all easily accessible online and have good reputations for large balance accounts. Regarding quarterly estimated taxes - since you'll likely owe more than $1,000 in additional tax from this capital gain, the IRS generally expects quarterly payments. However, there's a safe harbor rule: if you pay at least 100% of last year's total tax liability through withholding and estimated payments (110% if your prior year AGI was over $150k), you won't owe penalties even if you underpay during the year. So if your regular W-2 withholding covers 100%+ of last year's tax bill, you might be able to wait until filing season without penalties. But given the size of your gain, I'd strongly recommend making at least one estimated payment for Q4 to avoid a massive tax bill next April. The Q4 estimated payment deadline is January 15th, so you'd have time to receive your proceeds and calculate what you owe. A tax professional could run scenarios for you, but as a rough estimate, set aside 25-30% of your net proceeds (after deducting sale costs) to cover federal taxes, NIIT, and have a buffer for any state obligations or unexpected items.

Great questions! For high-yield savings accounts, I'd recommend looking at online banks like Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer rates around 4-5% right now and are all FDIC insured. Since you'll need the money within a year, avoid CDs or anything with penalties for early withdrawal. Regarding quarterly estimated taxes - this is really important! If you expect to owe more than $1,000 in taxes for the year (which you almost certainly will with a gain this size), you're generally required to make quarterly payments to avoid underpayment penalties. The IRS wants their money as you earn it, not all at once next April. You have a few options: you can increase your W-2 withholdings for the rest of the year if that's feasible, or start making quarterly estimated payments. The next quarterly payment deadline would be January 15th for the fourth quarter of this year. You'll need to calculate roughly what you'll owe and divide by the remaining quarters. The penalty for underpayment isn't huge (usually around 8% annually), but it's still money out of your pocket. A tax professional can help you figure out the exact amount you should be setting aside and whether quarterly payments make sense for your situation. Given the size of this transaction, it's probably worth the consultation fee to get it right!

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates (currently around 4-5% APY) and are FDIC insured. Since you'll need the money within a year, avoid CDs or anything with penalties for early withdrawal. Regarding quarterly estimated taxes - this is important! If the tax on your capital gain will be more than $1,000, you're generally required to make quarterly payments to avoid underpayment penalties. Since you normally just have W-2 income, you might not be used to this, but with a gain this large, you'll likely need to start. The IRS expects you to pay taxes as you earn income throughout the year. You can either: (1) increase withholding from your regular job to cover the extra tax, or (2) make quarterly estimated payments. The next quarterly deadline after you receive your proceeds would determine when your first payment is due. There's a safe harbor rule though - if you pay 100% of last year's total tax liability (110% if your prior year AGI was over $150k) through withholding and estimated payments, you won't face penalties even if you owe more when you file. This might be the easiest approach - just make sure your total payments for the year meet that threshold. I'd definitely run this by a tax professional once you know your exact sale amount and timing!

Great questions! For high-yield savings accounts, I'd recommend looking at online banks like Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and currently offering rates around 4.5-5%. Since you'll need the money within a year, avoid CDs or anything with penalties for early withdrawal. Regarding quarterly estimated taxes - this is important! If you expect to owe more than $1,000 when you file your return, and your withholding plus previous year's payments don't cover at least 90% of this year's tax liability (or 100% of last year's tax if your AGI was over $150k), you'll need to make quarterly payments to avoid underpayment penalties. Given the size of your gain, you'll almost certainly cross that $1,000 threshold. I'd strongly recommend making a quarterly estimated payment for Q4 (due January 15, 2025) at minimum. Calculate roughly 25-30% of your expected gain and send that in. You can always get a refund if you overpay, but underpayment penalties add up quickly. Use Form 1040ES to calculate and make the payments. The IRS also has an online payment system that makes it pretty straightforward. Better to overestimate slightly than deal with penalties later!

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates around 4-5% APY and are all FDIC insured. Since you'll need the money within a year, avoid CDs or anything with penalties for early withdrawal. Regarding quarterly payments - this is really important! If your tax liability from the capital gain will be more than $1,000 beyond what's already withheld from your W-2, you're generally required to make estimated payments to avoid underpayment penalties. The IRS expects you to pay as you go, not wait until filing season. Here's a rough calculation: if your gain is $150k and you're in the 15% capital gains bracket plus 3.8% NIIT, that's about $28,200 in additional tax ($150k × 18.8%). Since this likely exceeds $1,000, you'd need to start making quarterly payments. The safe harbor rule might help though - if you pay 100% of last year's total tax liability through withholding and estimated payments (or 110% if your prior year AGI was over $150k), you won't face penalties even if you owe more when you file. I'd strongly suggest consulting with a tax professional soon after you receive the funds to calculate your exact estimated payment requirements. The penalties for underpayment can add up, especially on a large amount like this.

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and currently offering around 4-5% APY with no minimums or fees. Since you'll need the money within a year, avoid CDs or anything with penalties for early withdrawal. Regarding quarterly estimated taxes - yes, you'll likely need to start making them! The IRS requires quarterly payments if you'll owe more than $1,000 when you file your return. With a potential gain of $120k-180k, you're definitely going to exceed that threshold. The penalty for not paying quarterly can be significant, so I'd calculate roughly what you'll owe and start making payments. The quarterly due dates for 2024 are April 15, June 17, September 16, and January 15, 2025. Since you're getting the money partway through the year, you'll want to calculate what portion of the annual tax liability applies to each remaining quarter. You can use Form 1040ES to help with the calculations, or better yet, consult with a tax professional to make sure you're paying enough to avoid penalties but not overpaying unnecessarily.

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates around 4-5% APY and are FDIC insured. Since you'll need the money within a year for taxes, avoid CDs or anything with withdrawal penalties. Regarding quarterly estimated taxes - if this capital gain will result in you owing $1,000 or more in additional tax beyond what's withheld from your W-2, you're generally required to make estimated payments to avoid underpayment penalties. The IRS expects you to pay taxes as you earn income, not wait until the following April. However, there's a safe harbor rule: if you pay at least 100% of last year's total tax liability through withholding and estimated payments (110% if your prior year AGI was over $150k), you won't owe penalties even if you underpay the current year. So if your regular W-2 withholding already covers 100% of last year's tax, you might be able to wait until you file your return. That said, with a gain this large, I'd strongly recommend making at least one quarterly payment after you receive the funds. You can calculate roughly what you'll owe and send in a payment to avoid a large tax bill next April. The IRS website has worksheets for estimated tax calculations, or a tax professional can help you figure out the right amount.

For high-yield savings accounts, I'd recommend looking at online banks like Marcus by Goldman Sachs, Ally, or Capital One 360 - they're currently offering rates around 4-5% APY, are FDIC insured, and have no minimum balance requirements. Since you'll need the money within a year for taxes, avoid CDs or anything with penalties for early withdrawal. Regarding quarterly estimated taxes - this is really important! If the tax you'll owe on this capital gain is more than $1,000, you're generally required to make estimated quarterly payments to avoid underpayment penalties. The IRS expects you to pay as you go, not wait until filing season. Since you normally just have W-2 income, you have a couple options: you could increase your withholding at work for the rest of the year to cover the additional tax, or start making quarterly payments. The next quarterly payment deadline is January 15th, 2025, so you'd want to calculate and pay the first installment then if your sale happens soon. A good rule of thumb is to set aside about 25-30% of your capital gain immediately - this should cover federal capital gains tax, potential NIIT, and give you a buffer. You can always get a refund if you overpay, but underpayment penalties are annoying to deal with. I'd strongly recommend consulting with a tax professional once you have the final sale amount to run the exact numbers and set up a proper estimated tax payment plan!

Great questions! For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and currently offering rates around 4-5%. Since you'll need the money within a year, stick with savings accounts rather than CDs for the flexibility. Regarding quarterly estimated taxes - yes, you'll likely need to start making them! The IRS requires quarterly payments if you'll owe more than $1,000 in tax for the year beyond what's already withheld from your W-2. With a capital gain of $120k-180k, you're definitely going to exceed that threshold. The general rule is you need to pay either 90% of this year's tax liability OR 100% of last year's total tax (110% if your prior year AGI was over $150k) through withholding and estimated payments to avoid underpayment penalties. Since your W-2 withholding probably won't cover the extra tax from this large capital gain, you'll want to make estimated payments starting with the quarter when you receive the funds. I'd strongly recommend calculating this with a tax professional since the penalty for underpayment can be significant on large amounts. They can help you figure out exactly how much to pay quarterly to stay compliant and avoid any surprises next April.

For high-yield savings accounts, I'd recommend checking out Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates (currently around 4-5%) with no minimum balance requirements and easy online access. Make sure whatever you choose is FDIC insured and allows you to easily transfer funds when tax time comes. Regarding quarterly estimated taxes - this is really important! If your tax liability from this capital gain will be more than $1,000 above what's being withheld from your regular W-2 income, you're generally required to make quarterly estimated payments to avoid underpayment penalties. The IRS expects you to pay as you go, not wait until filing season. Since you're looking at potentially $18k-36k in capital gains tax (15-20% of $120k-180k), plus possible NIIT, you'll almost certainly need to make quarterly payments. The next deadline is January 15th for Q4 2024, so you'll want to calculate and pay quickly once you receive the funds. You can make estimated payments online through EFTPS or IRS Direct Pay. I'd suggest calculating 25% of your expected total tax liability and paying that amount quarterly, adjusting as needed. A tax professional can help you determine the exact amount, but don't wait too long since penalties can add up quickly on large amounts like this.

Great questions! For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates (currently around 4-5% APY) and are FDIC insured. Just make sure there are no minimum balance requirements or withdrawal restrictions that might complicate accessing your tax money when needed. Regarding quarterly estimated taxes - this is really important to get right! If the tax you'll owe on this capital gain is more than $1,000, and it represents a significant increase over what you normally owe, you'll likely need to make quarterly payments to avoid underpayment penalties. The general rule is you need to pay either 90% of the current year's tax liability or 100% of last year's liability (110% if your prior year AGI was over $150k) through withholding and estimated payments. Since this sounds like it could create a substantial tax bill, I'd strongly recommend calculating roughly what you'll owe as soon as you know the final sale amount and making a quarterly payment for Q4 2024 (due January 15, 2025). You can use Form 1040ES to calculate this. The penalty for underpayment isn't huge, but it's easily avoidable with some planning. Consider this scenario: if your capital gains tax ends up being $30k, you definitely don't want to wait until April to pay it all, especially since the IRS expects taxes to be paid as income is earned throughout the year.

For high-yield savings accounts, I'd recommend looking at online banks like Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're currently offering rates around 4-5% APY, all FDIC insured, and have no minimum balance requirements. Since you're potentially looking at setting aside $30k-50k for taxes, that interest could add up to a meaningful amount over the months until you file. Regarding quarterly estimated taxes - yes, you'll likely need to make them if your total tax liability for the year (including this capital gain) will be more than $1,000 above what's withheld from your W-2. The IRS generally expects you to pay as you earn, not wait until filing. Since you're receiving this money during the year, they'll want their cut in quarterly installments. However, there's a safe harbor rule: if you pay at least 100% of last year's total tax liability through withholding and estimated payments (or 110% if your prior year AGI was over $150k), you won't owe penalties even if you underpay this year's actual liability. So look at your 2023 tax return - if you can cover that amount through your regular W-2 withholding plus estimated payments, you'll avoid penalties and can pay the balance when you file. I'd definitely run this by a tax professional though, as the timing of when you receive the funds affects which quarterly payment deadlines apply!

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and typically offer competitive rates around 4-5% APY currently. Since you'll only need the money accessible for about a year, these are perfect for your situation. Regarding quarterly estimated taxes - this is really important! If you expect to owe $1,000 or more in taxes when you file, you're generally required to make quarterly estimated tax payments to avoid underpayment penalties. With a potential gain of $120k-180k, you'll almost certainly hit this threshold. The quarterly payment due dates are: January 15, April 15, June 15, and September 15. Since you're receiving the money mid-year, you'd likely need to make payments for Q3 and Q4 this year, then adjust when you file your return. You can use Form 1040ES to calculate estimated payments, or work with a tax professional to determine the right amount. The penalty for underpayment isn't huge, but it's easily avoidable with proper planning. Better to overpay slightly and get a refund than underpay and owe penalties plus interest. Since this sounds like it could be a substantial tax liability, I'd really recommend consulting with a CPA who has experience with international transactions - the cost will likely pay for itself in proper planning and peace of mind.

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and typically offer competitive rates (currently around 4-5%). Since you'll need the money within a year, avoid CDs or anything with penalties for early withdrawal. Regarding quarterly estimated taxes - this is really important to get right! If the tax you'll owe on this capital gain is more than $1,000, you're generally required to make estimated payments to avoid underpayment penalties. The IRS expects you to pay taxes as you earn income, not wait until filing season. However, there's a safe harbor rule: if your total tax payments for the year (through withholding from your W-2 plus any estimated payments) equal at least 100% of last year's tax liability (or 110% if your prior year AGI was over $150k), you won't owe penalties even if you underpay during the year. So if your normal W-2 withholding already covers 100% of last year's tax, you might be able to wait until filing. But if this capital gain creates a much larger tax bill than usual, you'll probably need to make at least one estimated payment by January 15th to avoid penalties. I'd definitely run the numbers or consult with a tax pro on this one - underpayment penalties can add up quickly on large amounts!

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates (currently around 4-5%) and are FDIC insured. Marcus has been particularly reliable for me, and there are no minimum balance requirements or monthly fees. Regarding quarterly estimated taxes - this is crucial to get right! If you normally just have W-2 income and this capital gain will create a large tax liability, you'll likely need to make estimated payments to avoid underpayment penalties. The general rule is if you'll owe more than $1,000 in taxes beyond what's withheld from your regular job, you need to make quarterly payments. Since you're looking at potentially $18k-36k in capital gains taxes (15-20% of your gain), plus possibly the 3.8% NIIT, you're definitely in penalty territory if you wait until next April to pay. I'd suggest making your first estimated payment for Q4 2024 (due January 15, 2025) once you receive the funds, then continuing with quarterly payments next year. The safe harbor rule might help though - if your total tax payments for the year (withholding + estimated) equal at least 100% of last year's tax liability (110% if your prior year AGI was over $150k), you can avoid penalties even if you owe more in April. Check your 2023 return to see if this strategy might work for you.

Great questions! For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they typically offer competitive rates (currently around 4-5% APY) and are FDIC insured. Just make sure there are no withdrawal restrictions since you'll need access for tax payments. Regarding quarterly estimated taxes - this is really important! If you expect to owe $1,000 or more in taxes when you file, the IRS generally requires quarterly payments to avoid underpayment penalties. Since you're looking at a potential six-figure capital gain, you'll almost certainly hit that threshold. The safe harbor rule is key here: if you pay either 90% of this year's tax liability OR 100% of last year's total tax (110% if your prior year AGI was over $150k) through withholding and estimated payments, you avoid penalties. Since this gain will likely far exceed your normal tax liability, I'd strongly recommend making estimated payments. You'd want to make your first estimated payment for Q3 2024 by September 16th (since the sale hasn't happened yet), then Q4 by January 15th, 2025. Many people split it 50/50 between those two quarters, but you could also do it all in Q4 if the sale happens late in the year. Consider using Form 1040ES to calculate the amount, or better yet, consult with a tax professional who can run the numbers based on your complete financial picture.

For high-yield savings accounts, I'd recommend looking at Marcus by Goldman Sachs, Ally Bank, or Capital One 360 - they're all FDIC insured and currently offering rates around 4-5%. Marcus is particularly good for this since there are no minimum balance requirements and you can easily transfer money out when needed for tax payments. Regarding quarterly estimated taxes - since you normally just have W-2 income, you'll likely need to make estimated payments to avoid underpayment penalties. The IRS generally requires quarterly payments if you expect to owe $1,000 or more in tax beyond what's withheld from your regular job. With a capital gain of $120k-180k, you're definitely going to hit that threshold. The safe harbor rule might help you though - if you pay 100% of last year's total tax liability through withholding and estimated payments (110% if your prior year AGI was over $150k), you won't face penalties even if you end up owing more. You could increase your W-4 withholding at work for the rest of the year, or make quarterly estimated payments using Form 1040ES. I'd suggest calculating roughly what you'll owe (around 15-20% federal capital gains plus potential 3.8% NIIT plus state taxes if applicable) and either make a large estimated payment for Q4 or significantly increase your payroll withholding for the remaining months of the year. Don't wait until next April - the penalties for underpayment can add up!