In Australia, the minimum age to rent a truck might vary slightly from one rental company to another. For most companies, the minimum age for renting a truck without restrictions is 25 years. For others, it’s 21 years. For such companies, drivers between the ages of 21-24 might be subject to additional fees and restrictions, such as a ‘Young Driver Surcharge’ (typically 15 AUD) which may apply to your rental.