Longterm Capital Gains: A single rate, or multiple rates across annual income?

[akoniti]

A couple hours reading articles has left me uncertain, I've found conflicting answers to what I thought would be a simple query:

In an example where taxable income is $50,000, composed of 100% longterm capital gains, is the first $40,400 taxed at the 0% rate, and the remainder at 15%?

Or, is the entirety taxed at the 15% rate because taxable income exceeded the 0% tier threshold?

[Critter-3]

first $40,400 taxed at the 0% rate, and the remainder at 15%?

CORRECT

[akoniti]

Thanks Critter!