Tasmanian Treasurer Eric Abetz has vowed to take "decisive action" to rein in the state's ballooning debt — but his first "interim" state budget contains few major initiatives.

The post-election budget projects a slightly improved financial position, including a net operating surplus in 2028-29, plus a slightly lower level of debt — peaking at $10.4 billion in 2028-29 — than what former treasurer Guy Barnett unveiled in May's budget that failed to pass state parliament.

It includes just three new small savings measures, on top of the already announced Efficiency and Productivity Unit. Those measures are:

Cuts to department marketing and communications spending

Office and leasing "improvements"

Procurement "enhancements"

Those savings are set to total $12 million a year at their peak.

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