Why is my inflation different from the official figure?

The official figure, the Consumer Price Index (CPI), weights price changes by what the average household spends. If you spend more than average on things rising fast, such as rent, home heating oil or fuel, your own inflation is higher.

Where do the price changes come from?

The Central Statistics Office's Consumer Price Index for September 2026. Prices rose 4.1% over 12 months overall. Home heating oil rose 58.6%, mortgage interest 10.2% and groceries 0.4%.

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Your own inflation rate

The latest official price rises, weighted by your own spending: your own inflation rate, its cost to you, and whether your pay keeps up.

Self-assessment tool. The figures come from your own answers. It isn't advice, and you're responsible for what you file or claim. heypenny.ie is a trading name of Kinch Press. Read the disclaimer.

Common questions

Why is my inflation different from the official figure?: The official figure, the Consumer Price Index (CPI), weights price changes by what the average household spends. If you spend more than average on things rising fast, such as rent, home heating oil or fuel, your own inflation is higher.
Where do the price changes come from?: The Central Statistics Office's Consumer Price Index for September 2026. Prices rose 4.1% over 12 months overall. Home heating oil rose 58.6%, mortgage interest 10.2% and groceries 0.4%.

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