Convicted tax office letter bomber Colin George Dunstan has been awarded more than $415,000 in workers compensation.
But the former public servant will only receive $248,306.27 after amounts are deducted for previous payouts.
Dunstan posted 28 bombs to colleagues and high-profile public servants he believed had wronged him in 1998.
Most were intercepted by police, however one detonated at the Fyshwick mail centre, injuring a postal worker.
Dunstan spent nine years behind bars after he was convicted of charges of posting an explosive and attempting to inflict grievous bodily harm
The former Australian Taxation Officer IT worker was officially sacked from the public service in 2001, about a year after he was imprisoned.
Dunstan won a two-decade fight for compensation in 2012, after the Administrative Appeals Tribunal found his former workplace had contributed to his chronic depression, which led to his crimes.
He claimed he had been left depressed and suicidal after a former lover sexually harassed and stalked him in the fallout of a soured office romance.
The tribunal ordered Comcare to start working out how much Dunstan was owed, with the workplace insurer determining he was entitled to $426,760.60 for incapacity.
Dunstan disputed the figure and Comcare recalculated his payout at $415,718.65.
But the amount received by Dunstan would be reduced by $167,412.38 - the cost of an interim payment and Centrelink allowance he had already received.
Dunstan challenged the revised figure in the tribunal, arguing the figure should be adjusted to include payments for productivity, performance, suspension, leave of absence, and hardship.
The tribunal acknowledged the case was complicated as Dunstan’s claim surrounded and overlapped periods he had been suspended from his job or in jail.
But on Thursday, it found Comcare’s reduced figure had been correct.
“Mr Dunstan’s assertions concerning the amount of his [normal weekly earnings] during the specific periods agitated in these proceedings are not made out,” the judgment said.
“The weekly amounts of compensation I have calculated and the overall quantum of compensation for incapacity Mr Dunstan is entitled to receive … for the periods presently under consideration are the same as those calculated by Comcare in the reviewable decision.”
Dunstan still has an ongoing legal battle in the ACT Supreme Court over the validity of his suspension from duty.
The matter was heard last year and the decision is currently reserved.