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YearMonthComposite Consumer Price IndexConsumer Price Index (A)Consumer Price Index (B)Consumer Price Index (C)
IndexYear-on-year % changeIndexYear-on-year % changeIndexYear-on-year % changeIndexYear-on-year % change
2015 100.6 +3.0 100.6 +4.0 100.6 +2.9 100.5 +2.1
2016 103.0 +2.4 103.5 +2.8 102.9 +2.3 102.6 +2.1
2017 104.5 +1.5 105.1 +1.5 104.3 +1.4 104.2 +1.5
2017 Jul 104.7 +2.0 105.2 +2.5 104.5 +1.8 104.4 +1.7
Aug 104.8 +1.9 105.3 +2.4 104.6 +1.7 104.6 +1.8
Sep 104.6 +1.4 105.2 +1.5 104.3 +1.3 104.1 +1.4
Oct 104.9 +1.5 105.5 +1.6 104.6 +1.4 104.5 +1.5
Nov 105.2 +1.6 105.8 +1.5 105.0 +1.5 104.9 +1.7
Dec 105.6 +1.7 106.1 +1.7 105.4 +1.6 105.4 +1.9
2018 Jan 105.5 +1.7 106.3 +2.0 105.3 +1.6 105.1 +1.5
Feb 106.9 +3.1 107.5 +3.1 106.7 +3.0 106.5 +3.2
Mar 106.6 +2.6 107.4 +2.8 106.3 +2.5 106.0 +2.5
Apr 106.5 +1.9 107.3 +2.2 106.2 +1.8 106.0 +1.7
May 106.5 +2.1 107.3 +2.3 106.3 +2.0 106.0 +1.9
Jun 106.8 +2.4 107.6 +2.6 106.5 +2.3 106.2 +2.2
Jul 107.2 +2.4 107.9 +2.5 106.9 +2.3 106.8 +2.3
Aug 107.2 +2.3 107.9 +2.5 106.9 +2.2 106.7 +2.0
Sep 107.4 +2.7 108.7 +3.3 107.0 +2.5 106.6 +2.4
Notes : '0.0'Denotes increase or decrease of less than 0.05%.
 Four series of Consumer Price Indices (CPIs) are compiled to reflect the impact of consumer price changes on households in different expenditure ranges.
 The CPI(A), CPI(B) and CPI(C) are compiled based on the expenditure patterns of households in the relatively low, medium and relatively high expenditure ranges. By aggregating the expenditure patterns of all households covered by the above three indices, a Composite CPI is also compiled to reflect the impact of consumer price changes on the household sector as a whole. The year-on-year rate of change in this index is generally taken to reflect overall consumer price inflation.
 The CPI(A), CPI(B) and CPI(C) respectively cover some 50%, 30% and 10% of households in Hong Kong. The average monthly household expenditures (in HK$) of these groups during the base period (i.e. October 2014 - September 2015) were $5,500 - $24,499, $24,500 - $44,499 and $44,500 - $89,999 respectively. Taking into account the impact of price changes since the base period, the monthly household expenditure ranges of the CPI(A), CPI(B) and CPI(C) adjusted to the price level of 2017 are broadly equivalent to $5,800 - $25,700, $25,700 - $46,400 and $46,400 - $93,800 respectively, and that of the Composite CPI is broadly equivalent to $5,800 - $93,800. The Composite CPI is compiled based on the overall expenditure patterns of all these households taken together.
 The CPIs from October 2014 onwards are compiled based on expenditure weights obtained from the 2014/15 Household Expenditure Survey. The CPIs for earlier periods are compiled based on old weights and have been re-scaled to the new base period for linking with the new index series.
 In deriving the year-on-year rates of change, indices of more than 1 decimal place are used in the calculation.
 The year-on-year rates of change before October 2015 were derived using the index series in the base periods at that time (for instance the 2009/10-based index series), compared with the index a year earlier in the same base period.
Source : Consumer Price Index Section,
Census and Statistics Department
(Enquiry telephone no. : 3903 7374
 Enquiry e-mail : cpi@censtatd.gov.hk)



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