I've been fortunate enough to have a salary high enough to maximize my 401-k contributions (limit is $18,000 this year.)
I've also been fortunate enough to have employers who match my contributions. Typically, they match 50% of my contributions up to 6% of my salary.
HOWEVER, I've noticed a glitch in the system. All but one of the employers I've had will stop contributing to my 401K when I stop contributing. That is, they'll put the 3% salary match in per paycheck. If I hit my contribution limit, and stop contributing, the payroll software assumes I'm not contributing, so they won't apply the match. That means I get less than 3% of my total salary (because they don't take out 3% all year long.)
It happens automatically, so this is not on purpose. When I pointed it out, one of the employers actually fixed it in their software. None of the others could do it on their own (beyond their capabilities.)
The fix is that you have to reduce your contributions so that you hit your contribution limit on the very last paycheck of the year. As long as you contribute over 6% on every paycheck, then you get matched on every paycheck.
Has anybody else noticed this problem? It's a really subtle issue -- I usually have to pull out spreadsheets to demonstrate the problem to the accountants.
Are you leaving money on the table?