what is the maximum roth 401 k contribution for 2019?
You can split your annual elective deferrals between designated Roth contributions and traditional pre-tax contributions, but your combined contributions can't exceed the deferral limit - $19,500 in 2020 and $19,000 in 2019 ($26,000 in 2020 and $25,000 in 2019 if you're eligible for catch-up contributions).