The annual percentage change in the Retail Prices Index (RPI) in September 2017 was 3.1%.
Retail Prices Index (RPI) report for September 2017
The Jersey RPI report for December 2017 will provisionally be published on 19 January 2018.
How to work out the percentage change in prices
Use our inflation calculator to work out the percentage change in prices between two dates or to re-value a sum of money. For dates earlier than 1989 you will need to use the index numbers published in our spreadsheets to calculate the change yourself, or contact the Statistics Unit for assistance.
To calculate the percentage change yourself, use the published RPI index numbers and this formula:
[(Later date RPI - Earlier date RPI)/ Earlier date RPI] x 100
To re-value a sum of money with RPI index numbers use this formula:
Sum of money (£) x (Later date RPI/ Earlier date RPI)
The inflation calculator
Unfortunately, the inflation calculator doesn't work on Apple products, such as Macbooks, iPads and iPhones without a copy of the Microsoft Excel for Apple. We're sorry for any inconvenience caused, but we're looking to resolve the issue soon.
About the Retail Prices Index (RPI)
The Retail Prices Index (RPI) is the main inflation measure in Jersey. It measures the change each quarter in the price of the goods and services bought by an average household.
We compile the index using a representative ‘shopping basket’ of over 500 separate goods and services. We collect prices from a range of outlets every three months.
The RPI is commonly used to increase maintenance payments and rents. It is also used in wage negotiations. It is sometimes referred to as the 'cost of living' although strictly speaking it is not a cost of living index.
Reviewing the RPI ‘shopping basket’
To make sure that the RPI reflects consumer spending patterns we review the items in the basket every five years or so. We do this by analysing information from the Jersey Household Spending Survey. We carried out the last review of the basket of goods and services in 2013.
The report published for the 2007 Review of the Basket of Goods and Services describes the review process. It also explains how and why we choose the various items in the RPI basket.
RPI review report 2007
Other inflation measures
As well as the headline (All Items) RPI we also produce four other inflation measures:
RPI(X): underlying inflation measure which excludes mortgage interest payments
RPI(Y): underlying inflation measure which excludes mortgage interest payments and indirect taxes
RPI Low Income: for households in the lowest 20% of household income
The Fiscal Policy Panel oversees the production of assumptions about the Jersey economy, including for inflation
Fiscal Policy Panel
Download past reports and other data
You can search by year for past RPI reports on the Statistics Unit reports and documents page.
Statistics Unit reports and documents
RPI and RPI(X) annual percentage changes: 1989 onwards
RPI and RPI(X) index numbers: 1989 onwards
Annual average RPI index numbers: 1949 onwards
RPI group index numbers: 2000 onwards