W-4 question on investment income

[Ricardo24]

What is the best way to include projected investment income on my W-4?

[carmen_t]

Hello,

Excellent question.  You will account for this income on your W4 in Section 4 item "A."  This will include your anticipated income from other jobs so your work can account for your total income and withholdings properly.  Further if you will like to do an additional check I would use a refund estimator like TaxCaster.  Link is provided below. 

TaxCaster