Marion Superior Court Judge Heather Welch issued the ruling dated Friday, nearly six months after she heard arguments from attorneys for the state and IBM.
The Indiana Supreme Court ruled last year that IBM had breached its contract and it directed the trial court to calculate the damages.
Indiana and New York-based IBM sued each other in 2010 after then-Gov. Mitch Daniels cancelled the company's USD 1.3 billion contract to privatise and automate the processing of Indiana's welfare applications.
The contact was pulled in late 2009, less than three years into the 10-year deal, following complaints about long wait times, lost documents and improper rejections.
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The state sought more than USD 172 million from IBM, but the judge ruled IBM responsible for USD 128 million in damages. That amount was offset by about USD 50 million in state fees that the company was owed.
Peter Rusthoven, one of the state's private attorneys, said Monday that the ruling would be carefully reviewed before deciding on any additional appeals.
The state argued that IBM owed Indiana for the cost of fixing the company's problematic automation efforts to make the system workable, paying overtime for state staffers to review and correct those problems, and hiring new staff to help oversee that process, among other expenses.
IBM's attorneys argued that the company had delivered "substantial benefits" to the state that undermined Indiana's damages claims.