THE ambulance service is facing a budget cut of $16 million over four years, which is equivalent to the base salaries of up to 276 paramedics.

But the service denies it is cutting any front-line jobs.

An internal budget paper shows the ambulance service would lose $4.08 million this financial year as a result of the NSW government's labour expense cap, which will be applied over four years.

The NSW Ambulance Service budget for this financial year includes a $4.08 million labour expense cap saving.

Opposition Leader John Robertson said this amount was equivalent to the base salaries of up to 69 paramedics.