An annual report on the state's Supreme Court has revealed case backlog has worsened and if it is not addressed the number of pending criminal cases before the court will reach 1000 matters by July 2021.
Supreme Court Chief Justice Alan Blow said the average time taken to finalise a case was nearly two years from the time a person was arrested or charged.
As of 30 June 2019 there were 680 cases pending before the court.
480 cases were finalised in 2018-19, down from 493 in the previous financial year.
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The court's clearance rate for first instance criminal cases dropped from 85.7 per cent in 2017/18 to 72 per cent in 2018/19.
"The clearance rate needs to exceed 100 per cent in order for the backlog to be reduced," Chief Justice Blow said.
Chief Justice Blow said the Tasmanian government was well aware of the substantial backlog of pending criminal cases and an increasing quantity of appeals and applications by remand prisoners seeking bail and its response has been inadequate.
"The government could provide additional funding to the court, the Director of Public Prosecutions, and the Legal Aid Commission to enable more cases to be disposed of," Chief Justice Alan Blow said.
"Legislation could be passed and implemented for the purpose of reducing the court's workload."
Chief Justice Blow said the growth in the number of new criminal cases has been substantially contributed to as the result of two policy decisions over which the court has no control.
As of September 2017, all offences of dangerous driving are now dealt with in the Supreme Court and as of 2018-19 a revision by the DPP has resulted in many assault cases involving choking, smothering or strangulation, which previously would have dealt with by magistrates, going to the Supreme Court.
"Criminal prosecutions constitute roughly 80 per cent of the work of judges and only 20 per cent of the sentences imposed by the judges are sentences of imprisonment for two years or longer," Chief Justice Blow said.