So I can only choose whole percentages for my 401k contribution. Of course, those don't exactly map to fill out a $17,500 yearly contribution. I know I can change my contribution percentage, but that is only guaranteed to take effect '1 to 2 pay periods after entry' so that seems unreliable.
How do I make sure I contribute exactly $17,500, without over contributing, without under contributing, and without missing on any company match or potential tax deduction by not contributing in every period more or less equally?
It would be easier if I could contribute "21.216647%" or something. (For what it's worth, my income is $82,428.40 as implied by the example without holding).
That reminds me: I'll get a raise of somewhere between 0-5%, likely around 3%. It will be effective November 30, 2014.
How would you plan for this to maximize everything?