Central Luzon’s Consumer Price Index (CPI) for Bottom 30% Income Households May 2023

Reference Number: 


Release Date: 

Monday, July 10, 2023

Inflation Rate for Central Luzon’s Bottom 30 Percent Income Households Further Eased to 6.9 Percent

A continuous decrease in Central Luzon’s inflation rate for bottom 30 percent income households was recorded in May 2023 at 6.9 percent from
7.5 percent in April 2023, recording a 0.6 percentage points decrease in its year-on-year comparison. (Refer to Figure 1)

Central Luzon was seventh among regions in the country with the highest inflation rate for    bottom 30 percent income households in May 2023. MIMAROPA Region recorded the highest inflation at 8.5 percent followed by Western Visayas at 8.3 percent. Meanwhile, both Cordillera Administrative Region and Eastern Visayas posted the lowest inflation at 5.4 percent.

The headline inflation for bottom 30 percent income households in the Philippines decreased from 7.4 percent in April 2023 to 6.7 percent in May 2023.

Figure 2 shows the annual inflation rates of the different regions in the Philippines in May 2023.

The decrease in inflation for bottom 30 percent of income households could be attributed to lower increments in the indices of housing, water, electricity, gas and other fuels at 1.3 percent in May 2023 from 4.3 percent in April 2023, transport at 3.7 percent from 6.7 percent in the previous month, furnishings, household equipment and routine household maintenance at 8.6 percent from 8.7 percent, and alcoholic beverages and tobacco at
15.3 percent from 17.6 percent. (Refer to Table 1)

However, higher annual increments were recorded in the following indices:
• Clothing and footwear, 8.3 percent;
• Health, 5.3 percent;
• Information and communication, 1.1 percent;
• Recreation, sport and culture, 9.6 percent; and
• Restaurants and accommodation services, 7.8 percent

Moreover, same annual increments were noted in the following indices:
• Food and non-alcoholic beverages, 7.6 percent;
• Education services, 1.3 percent; and
• Personal care, and miscellaneous goods and services, 9.3 percent.

Meanwhile, financial services recorded zero inflation for the month of May 2023.

The annual growth rate in the regional food index also slowed down to 7.5 percent in May 2023 from 7.6 percent in April 2023. The downward trend could be primarily attributed to the lower increments in milk, other dairy products, and eggs (16.0%), meat and other parts of slaughtered land animals (0.5%) and flour, bread and other bakery products, pasta products, and other cereals (14.3%). Moreover, slower increments in the following food indices was recorded: (Refer to Table 2)

• Corn, 15.8 percent;
• Fish and other seafood, 8.0 percent;
• Oils and fats, 13.4 percent;
• Sugar, confectionery and desserts, 29.7 percent; and
• Ready-made food and other food products n.e.c., 11.2 percent.

Meanwhile, higher annual increments were noted in the following indices:
• Rice, 2.2 percent;
• Fruits and nuts, 17.9 percent; and
• Vegetables, Tubers, Cooking Bananas and Pulses, 8.9 percent.

Following the regional trend, the inflation rate for the bottom 30% of income households in all provinces and Highly Urbanized Cities (HUCs) in the region posted lower annual increments in May 2023, except Bulacan and City of Olongapo, which registered higher increments at 10.9 percent and 7.5 percent, respectively.

Bulacan had the highest inflation rate at 10.9 percent among the provinces and HUCs in the region, followed by Pampanga at 9.0 percent. On the other hand, Nueva Ecija had the lowest inflation rate at 2.3 percent.


Technical Notes

This Special Release presents the results of the Survey of Retail Prices of Commodities and Services for the Generation of Consumer Price Index (CPI) conducted in May 2023. 


The CPI is an indicator of the change in the average retail prices of a fixed basket of goods and services commonly purchased by households for their day-to-day consumption relative to a base year.

Uses of the CPI

As an indicator, the CPI is most widely used in the calculation of the inflation rate and purchasing power of the peso. It is a major statistical series used for economic analysis and as monitoring indicator of government economic policy.

The CPI is also used as a deflator to express value series in real terms, which is, measuring the change in actual volume of transaction by removing the effects of price changes. Another major importance of the CPI is its use as basis to adjust wages in labor management contracts as well as pensions and retirement benefits. The CPI also serves as inputs in wage adjustments through the collective bargaining agreements.

Components of the CPI

a. Base Period

This is a reference date or simply a convenient benchmark to which a continuous series of index numbers can be related. Since the CPI measures the average changes in the retail prices of a fixed basket of goods, it is necessary to compare the movement in previous years back to a reference date at which the index is taken as equal to 100.

The present series of CPI is rebased from base year 2012 to base year 2018.

b. Market Basket

Market basket refers to a sample of goods and services commonly purchased by the households.

The market basket for the CPI for All Income Households is updated using the results of the 2021 Survey of Key Informants (SKI). The survey, which was undertaken in March 2021, was conducted nationwide to store managers, sellers, or proprietors, to obtain information on the most commonly purchased goods and availed of services by the households.

The commodities included in the 2018-based CPI market basket are the modal commodities which were considered as the most commonly purchased/availed of commodities by the households.

The commodities in the 2018-based CPI market basket are grouped/classified according to the 2020 Philippine Classification of Individual Consumption According to Purpose (PCOICOP) which is based on the United Nations COICOP. Meanwhile, the commodities in the 2012-based CPI market basket used the 2009 PCOICOP version of classification of commodities.
Table A below presents the comparison of the commodity classification based on 2009 and 2020 PCOICOP which are adopted in the 2012-based and 2018-based CPI market baskets, respectively.

c. Weighting System

The weights for the 2018-based CPI were derived from the expenditure data of the 2018 Family Income and Expenditure Survey (FIES). The weight for each commodity/group of commodities is the proportion of the expenditure of the expenditure of commodity/group of commodities to the total national expenditure. The sum of the weights of the commodity groups at the national level is equal to 100.

d. Geographic Coverage

CPI values are computed at the national, regional, and provincial levels, for selected cities. A separate CPI for NCR is also computed.

Inflation Rate

The inflation rate (IR) is the annual or monthly rate of change of the CPI in percent. It is interpreted in terms of declining purchasing power of money.