A man fatally punched and kicked his employer in the head after he was told he was too drunk to work, a court has been told.

Darren William Dwyer, 24, was jailed Tuesday for 10 years and branded a serious violent offender for the attack on Beenleigh Darts Association manager Philip James McMillan.

Mr McMillan, 51, was attacked at his home in Woodridge, south of Brisbane, in March last year.