ABC reports the former professional footballer will be eligible for parole in just under two years.
Judge Graham Turnbull told Sydney's Downing Court Hayne's offending was "below mid-range" and he had a "seemingly low risk of reoffending".
Hayne has faced three trials over the assault, with the first ending in a hung jury and the guilty verdict of the second quashed.
Today's sentence was lighter than his previous sentence of five years and nine months.
