A Perth man has been found guilty of murder after claiming he was defending himself against a home invader when he tied up his victim and bashed and stabbed him before slashing his throat.

Key points: Dominic Calabro had admitted killing Andrew Minh Tran but denied murder

Dominic Calabro had admitted killing Andrew Minh Tran but denied murder Mr Tran died after suffering stab wounds and blunt force injuries in the attack

Mr Tran died after suffering stab wounds and blunt force injuries in the attack Prosecutors told the court the attack was a "painful, prolonged and brutal"

Dominic Calabro had been on trial in the Supreme Court for the past three weeks over the death of Andrew Minh Tran, whose body was found on the lounge-room floor of a house in Balga in July last year.

Friends and family of Mr Tran clapped and cheered when the jury delivered its verdict after about three hours of deliberations.

The court was told Mr Tran had suffered multiple injuries including stab wounds as well as blunt force injuries that were consistent with being inflicted by a metal tow hook that was found near his body.

Calabro, 40, later rang triple zero to tell police there was a body on the floor of his house and that they would find him at a nearby fast food restaurant.

Andrew Minh Tran's body was found on the lounge room floor of a house in Balga. ( Facebook: Andrew Tran )

Both men were found to have been intoxicated by methamphetamine, and prosecutors alleged the motive for the murder was "payback, animosity and anger".

The court heard Calabro told police that Mr Tran, who had visited his house before, had repeatedly threatened and assaulted him.

"He decided to pay Mr Tran back by knocking him out and inflicting wounds on him in a painful, prolonged and brutal way, and ultimately … he decided to kill him," state prosecutor David Jubb said.

Calabro admitted killing Mr Tran but maintained he did what he did because the 29-year-old had invaded his home, arguing that under the law his actions were lawful.

But the jury rejected his version of events.

Calabro was remanded in custody until he is sentenced in January.