Judge Munro said Phillips-McIvor filled out 13 forms that were untrue.
"This is deliberate and ongoing dishonesty," she said.
In sentencing Clark, the judge noted he had a number of previous dishonesty convictions, including a 2003 conviction for benefit fraud.
"This is not the first time you have decided to defraud the taxpayer for your own benefit."
Judge Munro said while Clark received less than Phillips-McIvor, he had also benefited from the extra money illegally obtained by his partner.
She chose not to sentence Clark to home detention so he could continue in full-time employment, working night shifts, and repay the money. However she imposed a 9am to 9pm curfew on him.
At the current rates it will take Phillips-McIvor 38 years and Clark four-and-a-half years to repay the amounts owed.
Last week the Rotorua Daily Post reported seven Rotorua benefit fraudsters had been prosecuted in the six months to March with wrongful payments amounting to $494,925.
Nationally, nearly 400 people were prosecuted between October and March for illegally claiming welfare payments that totalled just over $13.7 million.