Australians on government support payments can only afford six percent of rental properties, according to a report by Anglicare.

A snapshot of the more than 67,000 rental properties available across Australia on March 24 by the advocacy group found only 3729 were affordable for households on government income support payments.

Only one percent of rental properties in Sydney – 57 out of more than 18,000 – were found to be affordable, despite a 28 percent increase in rental market supply.

Only one percent of rental properties in Sydney are considered to be affordable, despite a 28 percent increase in rental market supply. (AAP) (AAP)

"These results show that finding an affordable and suitable home to rent in the private market is extraordinarily challenging," the Anglicare report released today reads.

For single people on the aged pension there was just over one percent of properties suitable nationwide and for those on the Disability Support Pension 485 rentals were affordable.

There wasn't one rental property affordable for a single person on Newstart or Youth Allowance in Sydney, Canberra, Melbourne, Adelaide, Darwin or Perth on a specific day in March.

There wasn't one rental property affordable for a single person on Newstart or Youth Allowance in Sydney, Canberra, Melbourne, Adelaide, Darwin or Perth on a specific day in March. (AAP) (AAP)

Anglicare wants negative gearing and capital gains tax exemptions phased out and the billions saved to go towards social and affordable rental housing for those in need.

It is also calling for a boost in Commonwealth Rent Assistance and changes to state and territory laws regarding renter's rights.

The group calculates affordability on the premise rent needs to be no more than 30 per cent of a household budget.