A tradie pulled over by police in a luxury sports car has more than $590 million in the bank but isn't at liberty to say how he got it, a Brisbane court has heard.

Phillip Johnathan Harrison was pulled over in a luxury Audi sports car on Friday he was allegedly in possession of Viagra, ecstasy and methamphetamine, known as ice.

The young bricklayer and carpenter told officers the government gave him the luxury vehicle, he also told them he was a multi-billionaire worth $12 billion the court heard.

Brisbane's Phillip Harrison was pulled over by police on Friday and was allegedly in possession of Viagra, ice and ecstasy

The court heard the 29-year-old has a bank balance of $596 million and a property portfolio of $1.56 billion

But when duty lawyer Nick Hanly asked his client where his wealth had come from Harrison said 'he wasn't at liberty to say'.

'At this point, I was considering getting mental health to come in,' Mr Hanly said.

But then at Harrison's request the lawyer logged into his clients online bank account.

It showed a cash balance of $596 million and a property portfolio of $1.56 billion.

It is believed Harrison only came into the substantial amount of wealth sometime in the last 12 months.

A net worth of $12 billion would put the tradie in the league of Harvey Norman co-founder Gerry Harvey, mining magnate Andrew Forrest and property and construction king Lang Walker if legitimate.

'I would not have believed it if I hadn't seen it with my own eyes,' Mr Hanly said of Harrison's bank balance.

The man was driving a luxury Audi when police pulled him over, he told police the car was given to him by the Australian government

The court heard Harrison believes he has a net worth of $12 billion

The court heard Harrison was an ice user.

Police prosecutor Sergeant Sean Francis suggested Harrison's passport be surrendered as a condition of bail, given his means could make him an increased flight risk.

Magistrate Anthony Gett agreed and also granted bail on the condition Harrison reside at a Tewantin address.