Is there a deadline to pay taxes on gains from stocks sold?

[saiprasad1983]

I sold some stocks (all from the same company) in May 2017 and made a profit of 10-12K.  I had held the stocks for almost 10 years. Can you please tell me if I need to report this before a certain date (Is there a quarterly deadline?) or if it is enough to just report it in my end of year tax returns?

[fanfare]

If you have substantial capital gains, IRS expects you to make an estimated tax payment for the relevant quarter of the year.

However, if you don't do that you will probably be OK anyway ( no penalty )

Maybe you're one who would rather be safe than sorry.

[Hal_Al]

It's enough to just wait and include it on your end of year tax return.

You should consider making estimated tax payments for the current tax year if both of the following apply:
- 1. You expect to owe at least $1,000 in tax for the current tax year, after subtracting your withholding and credits. 
- 2. You expect your withholding and credits to be less than the smaller of: 90% of the tax to be shown on your current year’s tax return, or  100% of the tax shown on your prior year’s tax return. 

Long term capital gains are taxed at a maximum of 15% and for people normally in the 15% tax bracket (or less) they are not taxable at all.

[fanfare]

People in the 15% tax bracket rarely have $12,000 profits on stocks mainly because they don't have any stocks.

[Hal_Al]

People who hold stocks 10 years are usually in the 15% bracket.