I think you can take the payrates and go about 1000-1200 x that for the year (this will show perdiem, holiday pay, training pay, bonuses, plus maybe a little extra flying here or there). At least that's what my W-2s have shown over the years. Then you can subtract taxes, medical, disability insurance, 401(k), stock purchase to find take-home. That's about 30-35% for me (5% 401(k), 5% stock purchase, family medical and dental, short-term disability).