The annual Vision Topless Car Wash was held in the organisation's car park opposite the Harbour Molars on Portsmouth Dr between 9.30am and 2.30pm.
Vision managing director Glen Stapley said more than 100 cars left the lot shining, netting the group about $530.
The money would ''kick-start'' Vision's fundraising for this year's Relay for Life, he said.
Last year the car wash made more than $2500, and although takings from Saturday were down Mr Stapley said a great time was had by the 14 volunteers.
''We had a good, steady day. We put in as much effort as last year, and the money is whatever it is on the day,'' he said.
Mr Stapley said after washing cars for five hours, Vision staff and other volunteers needed a clean themselves and a ''few buckets of water were thrown around''.
Dunedin 17-month-old Jack McKenzie was the youngest putting a sponge to good use, under the supervision of his parents Gemma Marshall and Matt McKenzie.
