Savvy Australian property investors can save a large amount on their tax bill by deducting associated expenses.

Negative gearing allows property investors to claim any shortfall between their income and expenditure on an investment property as a deduction against their total taxable income.

Most property investors are aware of the usual expenditure deductions that they can use to offset any income earned by an investment property. Regular costs such as maintenance, repairs, interest on loans and management fees can all be used to offset rental income.

However, there are a few lesser known tax strategies that property investors may care to look at as June 30 approaches:

Refinancing your mortgage

Refinancing your mortgage usually incurs a couple of one-off costs and fees. Investors who are planning on refinancing their mortgage may care to consider doing so before June 30 in order to claim these costs as a deduction in the 2015-16 financial year.

Pre-pay interest

Property investors who have sufficient funds to pre-pay interest on a loan can do so and claim the deduction in the current financial year. It is also possible to pre-pay (and claim a deduction for) your upcoming property insurance premiums.

Bring forward maintenance expenditure

If there are maintenance tasks that you know will need to be completed on an investment property, then you may wish to complete them before June 30 in order to minimise your tax bill in the current financial year.

Stay on top of your paperwork

Make sure that you are aware of the depreciations on any fittings or repairs, as well as any other costs you have incurred, for example, strata fees, management fees or rental losses.

Property investors are highly advised to discuss their tax situation with an accountant to ensure that their activities are compliant and that tax savings are maximised.