My partner and I jointly own a rental property which is negatively geared, but we claim all the loss on the return of the person in the higher tax bracket.
ANSWER
If you jointly own a rental property with your partner, then the income and expenses must be shared 50:50 and declared on your tax returns in this manner.
If you are planning to purchase a rental property and there is a significant difference in incomes, then you should seek advice BEFORE you purchase to ensure you are getting the best desired tax outcome.