Public Service Announcement: if you are one of those nerds (like me) that maxes out your TSP each year, make sure you calculate your max percentage so you aren't leaving money on the table by reaching your limit too early... nobody likes culminating early
Max Percent = 18,500/(annual base pay + incentive pay + special pay)
This assumes constant deposits throughout the year. I recommend you throw the numbers on a spread sheet to see all the deposits and ensure that you don't reach the 18,500 personal contribution limit (not government match) before the last paycheck.
This makes it even more interesting for people in a combat zone trying to max out all the financial benefits (SDP, and tax exempt into TSP up to $55k).
....aaaaand that's how I learned the 2018 contribution limit increased to $18,500 from $18,000.
¯\_(ツ)_/¯