The winning first division ticket for Wednesday night's draw was sold at Papamoa Pak'nSave after another lucky punter from Whangarei took away $5.5m in Powerball first division.
The couple plan to shout their adult children, who are currently overseas, a trip home this Christmas ''to enjoy a Kiwi summer as a family''.
''It's an amazing feeling knowing we will all be back together in just a few short weeks.''
The couple said they always tried to buy their tickets from Pak'n Save Papamoa after having a few little wins from there before.
"They're definitely our lucky store now!
"I never imagined that would mean that we'd soon be depositing half-a-million dollars into our account," the woman said.
Papamoa Pak'n Save Lotto supervisor Gloria Goepel said the win was exciting following the last big win of $1 million from a ticket sold on September 21.
She said the store had been abuzz with punters checking their tickets after news of last week's win broke.
On Saturday night, a person from the Bay of Plenty won $91,446 after playing MyLotto. The player won Lotto Second Division ($8,844) 10 times and Powerball 2nd Division once ($3,006), bringing the total winnings to $91,446.
This happens when a player plays the same six Lotto numbers on 10 lines, each with a different Powerball number.
Other big wins in Tauranga this year have included:
February: A Tauranga family won $7.1m with a Powerball ticket bought from AJ's Lotto
March: A Bay of Plenty local won $1m in Lotto first division
September: A Gate Pa man won $1m with a first division ticket from Gate Pa Superette
September: A Tauranga couple won $1m with a ticket bought from Pak'n Save Papamoa
October : AJ's Lotto sold a winning $333,333 Lotto first division ticket