I'll also throw this out there for those who have the TSP option available and are looking to rathole away more retirement money.

415 limits are per EMPLOYER. If the only contributions to your DPSP are the company contributions and 401a (ie...NO personal 401k contributions), you can still contribute to your TSP up to the full $18,500 (or more if you earn the money in a tax free combat zone). As always DYODD.