McIntosh has played every game this season, and Saturday's clash with Geelong at the MCG will take his career tally to 212 matches.
The No.31 pick from the 2012 national draft has been a picture of consistency right to the end, but he hasn't been offered a new deal for 2026 by the rebuilding Tigers.
At 31 years of age, McIntosh could explore his options elsewhere, with the word "retirement'' not featuring in his farewell to Richmond.
McIntosh has played more than 20 games in six of the past nine seasons, never dipping below 16 games in that period.
The veteran, who hails from WA, was part of the Richmond outfit that won the flag in 2017 to end the club's 37-year premiership drought.
He was an emergency for their 2019 grand final triumph over GWS, but was back in the team for their 2020 premiership win.
"I have had some incredible highs and some real lows during my time here," McIntosh said in a statement.
"The 2017 grand final, it is on par with one of the greatest achievements of my life.
"To see what it meant to all the fans, my family, my friends and to know that all the hard work that the playing group had put in had gotten us there.
"To get the ultimate success, you have to work incredibly hard, no doubt about it.
"Richmond has changed my life. I have grown up here. This club has become a family to me. (It) gave me a home away from home."
McIntosh has averaged 14.5 disposals per game to go with eight goals this season, with the Tigers (5-17) currently second last on the table.
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