AFL.com.au understands the new deal is yet to be finalised, but will be soon.
The 27-year-old high-flyer’s contract was due to expire at the end of the 2018 season, but the new deal will keep him in the black and white up until at least the end of 2021.
Howe began his AFL career at Melbourne and moved down Olympic Boulevard after the 2015 season.
Securing his place in the Magpies defensive set up, the Tasmanian continues to impress with his sensational marks – despite being overlooked in last year’s public vote in favour of Bomber Joe Daniher.
Howe finished fourth in the Copeland Trophy last season, another indication of his importance to Nathan Buckley’s side.
It is expected his new contract will be finalised before pre-season games get underway.