A federal judge in Pittsburgh also ordered Miller to pay a $40,000 fine and spend two years on probation following her release.
Miller pleaded guilty in both cases last year.
Prosecutors said she tried to cheat her creditors by hiding $775,000 worth of income and deserved prison. Miller's attorneys argued for probation, saying her creditors were made whole after the fraud was discovered.
The "Dance Moms" star was known for her brash behavior and pursuit of perfectionism from her students.
Miller announced in March that she was leaving the show.