The Aussie singer’s pledge, which was made on behalf of the entire Minogue family, matches the donation made by Pink over the weekend.
Sharing a picture of her in the Australian countryside on Instagram, Kylie said it was “heartbreaking” seeing the devastation caused by the fires.
“Last year I had the incredible opportunity of visiting some of the many beautiful places in my homeland for the first time,” she wrote.
“Returning home to such devastation throughout much of the country is heartbreaking.
“As a family, we’ve donated $500,000 towards the immediate firefighting efforts and the ongoing support which will be required.
“Big or small, from near or far, any support will help those affected by the devastating bushfires. With love, The Minogue Family.”
More than 20 people have died and millions of animals are believed to have been killed in the blazes that have ravaged the country in recent months.
At least eight people died last week in New South Wales and neighbouring Victoria, Australia’s two most-populous states, where more than 200 fires are currently burning.
Kylie is currently the face of Tourism Australia, which made its TV debut on Christmas Day.