Grocery inflation is at its lowest level since November 2022.
Last month Kantar said the figure for grocery inflation was at 14.7% - this month it's down to 12.8%.
It's the third month in a row the rate of inflation has slowed.
It's still far above the overall inflation rate for the economy which the CSO recently estimated it to be at 4.6%.
Kantar says it looks at the prices for over 30,000 products on shop shelves.
It says customers in supermarkets will be paying around 36 cent less on average for essentials like butter, milk, and cheese.
The body also says own label products continue to grow in sales with increases in the past three months of 13%.