The harmonised index of consumer prices for October was estimated to have risen to 9.5% in October, according to the Central Statistics Office.
This measure of inflation was 8.6% in September.
This "flash estimate" for Ireland is part of the EU wide monthly estimate of inflation which will be published in full on Monday.
Energy prices remain the main driver of inflation in Ireland. They are estimated to have increased by 13.6% in October and are up 47.6% compared to a year ago.
When energy prices are excluded, inflation was 5.9% higher on an annual basis.
Other figures out today show how inflation is eating into the pockets of consumers.
Spending on credit and debit cards was down 7% in September, according to the Central Bank, and much of the annual increase in spending in shops is accounted for by higher spending on groceries.
Meanwhile, retail sales figures from the Central Statistics Office show a decline in September in both the volume and value of sales.
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he volume of retail sales has been flat or declining since the initial bounce back from Covid restrictions at the start of this year.
