Prosecutors say 40-year-old Tanya Marchiol was sentenced for helping drug dealers buy a house and for failing to pay income tax on $1.4 million earned between 2008 and 2010.
Marchiol pleaded guilty to tax evasion in November before a jury convicted her on the money laundering charges.
The sentence was less than half of the nine-year prison term sought by prosecutors.
Marchiol initially pleaded not guilty in the case.
She is the founder and former chief executive officer of Team Investments in Phoenix.
Copyright 2015 The Associated Press modified.