You know, don't push the button, don't push the button, don't push the button, and then some socko finish. I was pleasantly surprised by how the book bobs and weaves and is a lot more active and entertaining that just that. MILD SPOILER, so don't tell your four year old.
The late payment penalty applies to any portion of your federal tax that remains unpaid as of the due date, typically the tax filing date. The IRS imposes a failure-to-pay penalty of one half of one percent for each month or part of a month that the tax goes unpaid.
There are two ways the government will calculate what you owe when you file your taxes. You have to pay whichever amount is higher. The penalty for 2017 is the greater of: $695 for each adult and $347.50 for each child, but no more than $2,085 per family, OR. 2.5% of your family yearly taxable income, but no more than the national average annual premium for a bronze plan sold through the Marketplace.