Manufacturing, or factory gate prices, increased by 3.4% last month, compared to a fall of 0.6% for March of last year.
According to new Central Statistics Office figures, the annual percentage was up 9.5% in March 2015, compared to an increase of 5.2% in the year to February 2015.
In March, the price index for export sales increased by 3.5%, while the index for home sales increased by 2.8%.
Over the year there was an increase of 11.9% in the price index for export sales - this can be influenced by currency fluctuations - and a decrease of 3.3% for home sales. .
In March the biggest increase was in the computer, electronic and optical products category - up 5.2%.
The price of manufacturing basic pharmaceutical products and pharmaceutical preparations was up 4.6%. There were decreases in dairy products and medical and dental Instruments.
Over the year computer, electronic and optical products was 19% higher.