The Australian Industry Group released its services purchasing managers' index (PMI) for Australia on late Tuesday. Australia's PMI fell to 49.6 in May from 49.7 in April.
A reading below 50 indicates a contraction of the sector.
The sales, new orders, supplier deliveries and stock levels subindex contracted, while employment subindex expanded.
The three-month moving average for the services PMI fell 0.7 points to 49.8.