The Q3 Tax Payment Is Due September 15 and the IRS Is Charging 7%. A Bigger Check Now Does Nothing for the April and June Quarters.
The third-quarter estimated tax payment is due September 15, and the IRS is charging 7% on what you underpaid. Here’s the part that trips retirees up: a bigger check now does nothing for the April and June quarters. Two things do — one you set up in December, one written specifically for people who retired after 62.