Irish consumer prices fell 0.5% in January, according to new figures from the Central Statistics Office.
However, that's an increase of 1.2% on the same period last year.
Over the 12 months there were increases in the cost of education (4.7%), alcohol and cigarettes (4.5%) and goods and services (3.6%).
Meanwhile, the cost of communications (5.7%), furniture and household equipment (3.3%) and clothes and shoes (1.2%) all dropped.