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Tax advice: large capital gain

Posted on 10/8/25 at 1:40 pm
Posted by DB_tiger
BTR
Member since May 2025
289 posts
Posted on 10/8/25 at 1:40 pm
Recently sold about 100k in investments to prepare for some large purchases in a couple months (down payment on house, and a new car since mine decided it’s getting tired of living)

According to my fidelity app, I have a short term gain of around $24k, and a long term gain of around $30k.

Now my question is, will I need to pay estimated taxes now/soon in 2025, or wait until next April? I looked at a “tax calculator” website that says I don’t, but the actual IRS website makes it seem like I will owe a penalty if I wait until tax time. Anyone know?
Posted by Jax-Tiger
Vero Beach, FL
Member since Jan 2005
26904 posts
Posted on 10/8/25 at 1:46 pm to
$54K in taxes on $100K of sales?

Is a lot of that state income tax? That seems to be a lot. You should not owe more than $20K on $100K of long term captial gains assets...
Posted by LoneStar23
USA
Member since Aug 2019
5782 posts
Posted on 10/8/25 at 1:49 pm to
You pay your realized capital gain tax at tax time

ETA:
quote:

The holding period. The length of time you held the stock determines whether the gain is classified as short-term or long-term. This classification affects your tax rate.
Short-term gains: For stock held one year or less, your profit is taxed at your ordinary income tax rate, which is the same rate as your wages.
Long-term gains: For stock held for more than one year, your profit is taxed at a more favorable long-term capital gains tax rate, which is typically lower than the ordinary income rate.
This post was edited on 10/8/25 at 1:50 pm
Posted by RedHawk
Baton Rouge
Member since Aug 2007
9530 posts
Posted on 10/8/25 at 2:01 pm to
quote:

$54K in taxes on $100K of sales?


Those are his gains that he will be taxed on. So he will probably owe about $13,500 depending on his income.
Posted by Jax-Tiger
Vero Beach, FL
Member since Jan 2005
26904 posts
Posted on 10/8/25 at 2:13 pm to
quote:

Those are his gains that he will be taxed on.


You're right. I misread it.
This post was edited on 10/8/25 at 2:15 pm
Posted by horsesandbulls
Destin, FL
Member since Jun 2008
5147 posts
Posted on 10/8/25 at 2:18 pm to
You won’t get penalized if you pay
1) 100% of your 2024 total tax liability (110% if your AGI is over 150k)

OR

2) 90% of your 2025 tax liability that is calculated on your 2025 1040.

Figure out what the answer to 1) is and make sure you pay that much in estimated taxes including any w2 withholding.


Then do your taxes in the spring and pay any remaining balance with the money you set aside from the proceeds to cover your taxes.

Don’t give the govt money early.
Posted by TorchtheFlyingTiger
1st coast
Member since Jan 2008
2914 posts
Posted on 10/8/25 at 3:01 pm to
Would holding a few more months until you actually needed the $ have made the short term gains long term? I'd hold off on the purchases if possible to avoid the extra tax hit. If in 22% bracket that's an extra 7% versus 15% LTCG. If lower bracket, you may even qualify for zero LTCG rate rather than paying your income tax rate on short term gains.

I think you're supposed to pay estimated quarterly taxes but as others have said pay 100 or 110% of last year and you should avoid underpayment penalty due to safe harbor rule.
Posted by el Gaucho
He/They
Member since Dec 2010
58484 posts
Posted on 10/8/25 at 3:02 pm to
quote:

down payment on house

If you can’t pay cash you can’t afford it
Posted by makersmark1
earth
Member since Oct 2011
20384 posts
Posted on 10/8/25 at 3:03 pm to
Do you have any losers to offset the gains?
Posted by Rize
Spring Texas
Member since Sep 2011
18695 posts
Posted on 10/8/25 at 3:07 pm to
quote:

If you can’t pay cash you can’t afford it


Babytac
Posted by DB_tiger
BTR
Member since May 2025
289 posts
Posted on 10/8/25 at 4:48 pm to
quote:

LoneStar23


Thank you!
Posted by Weagle25
THE Football State.
Member since Oct 2011
47463 posts
Posted on 10/8/25 at 7:03 pm to
quote:

You won’t get penalized if you pay
1) 100% of your 2024 total tax liability (110% if your AGI is over 150k)

OR

2) 90% of your 2025 tax liability that is calculated on your 2025 1040.

Figure out what the answer to 1) is and make sure you pay that much in estimated taxes including any w2 withholding.


Then do your taxes in the spring and pay any remaining balance with the money you set aside from the proceeds to cover your taxes.

Don’t give the govt money early.

This is your answer


Assuming your taxes are higher this year and you’ve paid in enough to cover last year’s amount (or 110% of last year depending on your AGI) then put whatever you’re going to owe in a high yield savings account until April.
This post was edited on 10/8/25 at 7:05 pm
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