A senior executive at the NBN Co took home $1.8 million for six months work after securing a seven-figure termination bonus from the job he began in 2013.

NBN Co's annual report, released last week, showed NBN Co's chief executive Bill Morrow took home $3.6 million last financial year, including a $1.2 million bonus.

This made Mr Morrow one of the highest paid public sector employees in Australia alongside Australia Post chief executive Ahmed Fahour, who earns about $4 million annually.

Mr Morrow was appointed in April 2014 on an annual base salary of more than $2 million.