New figures from the Central Statistics Office show that manufacturing prices rose by 0.9% in March from February.
This compares to no change for the same month last year and so resulted in an annual percentage increase of 1.1% in March.
The CSO said that the biggest changes in factory gate prices were increases in computer, electronic and optical products, which rose by 1.3%. Basic pharmaceutical products and preparations rose by 0.8% and other food products increased by 0.6%.
March saw decreases in the prices of fish and fish products, which fell by 1.5%, printing and reproduction of recorded media (down 0.2%) and electrical equipment (down 0.1%).
The figures show that the price of energy products fell by 1.7% in the year since March 2012, while petroleum fuels decreased by 4.1%.