Do you pay capital gains tax immediately after selling a rental property or do you just file your annual taxes like normal and pay then?

[VolvoGirl]

The sale and tax are included in your tax return.  You may want to send in an estimated payment if you have a big gain on the sale.

[Mike9241]

if you wait to pay until you file your return you may owe penalties for underpayment of estimated taxes. you

avoid this penalty you must meet one of the following tests.

There will be no federal penalties for not paying in enough taxes during the year if withholding
1) And timely estimated tax payments equal or exceed 90% of your 2021 tax
or
2) And timely estimated tax payments equal or exceed 100% of your 2020 tax (110% if your 2020 adjusted gross income was more than $150K)
or
3) the balance due after subtracting taxes withheld from 90% of your 2021 tax is less than $1,000
or
4) your total taxes are less than $1,000

state laws differ.