Here is something useful that I realized in my year-end planning... I figured I would post it both as a tip and to check my understanding if someone sees a flaw in this...
In thinking more about tax loss harvesting, I recently realized that it's best to do tax loss harvesting of LT (long-term) investments when you have 0 or almost no LT gains and a lot of ST gains (similar to my current situation for this year). Since tax-loss will offset ST gains, you save at the ordinary-income-tax rate. If on the other hand, you are offsetting LT cap gains, you are only saving taxes at the cap gains rate during the year.
Later on, even if you sell whatever you buy during your TLH exercise, you will pay at cap gains rate (assuming you hold it longer than a year). In other words, with above scenario, a benefit of TLH would be reducing taxes at ordinary tax rate and then paying taxes at (future) cap gains rate.
If you TLH when you have almost no ST or LT gains, you get to transfer tax savings into the future, but it will again offset LT gains first in future years at lower cap gains rate (up to 3k can be used each year I think if in future years you don't have any ST/LT cap gains).
In thinking more about tax loss harvesting, I recently realized that it's best to do tax loss harvesting of LT (long-term) investments when you have 0 or almost no LT gains and a lot of ST gains (similar to my current situation for this year). Since tax-loss will offset ST gains, you save at the ordinary-income-tax rate. If on the other hand, you are offsetting LT cap gains, you are only saving taxes at the cap gains rate during the year.
Later on, even if you sell whatever you buy during your TLH exercise, you will pay at cap gains rate (assuming you hold it longer than a year). In other words, with above scenario, a benefit of TLH would be reducing taxes at ordinary tax rate and then paying taxes at (future) cap gains rate.
If you TLH when you have almost no ST or LT gains, you get to transfer tax savings into the future, but it will again offset LT gains first in future years at lower cap gains rate (up to 3k can be used each year I think if in future years you don't have any ST/LT cap gains).