It's interesting to note that UAL has not been consistent in the numbers it publishes in the earnings press releases. In 2016 there was no reference to margin for the 1st or 2nd quarters, but for the 3rd Quarter they reported a number along with the full year 2016.

It's too early to tell what this year will be in terms of PS but I would tend to agree that percentage payout will be lower.

2016
Q1: Pre-tax $494 million (no margin provided)
Q2: Pre-tax $1.4 billion (no margin provided)
Q3: Pre-tax $1.6 billion (15.7% pre-tax margin)
Q4: Pre-tax $857 million (9.5% pre-tax margin)
Full-Year 2016: Pre-tax $4.5 billion (12.2% pre-tax margin)
All these numbers are before special charges which is what is used for PS.

2017
Q1: Pre-tax $196 million (2.3% pre-tax margin)
Q2: Pre-tax $1.3 billion (13.2% pre-tax margin)
Q3: ?
Q4: ?

Note that the press release stated that the pre-tax margin for 2016 was 12.2%. The pre-tax margin used to calculate our (the pilots') PS payout for 2016 was 14.1% per the company's PS calculation information. This resulted in 11.9029% PS payout to each eligible pilot.