Overview of the Selected Living Cost Indexes, Australia
The Selected Living Cost Indexes (SLCIs), Australia incorporates the Pensioner and Beneficiary Living Cost Index (PBLCI) and the Analytical Living Cost Indexes (ALCIs). The ALCIs have been compiled and published by the ABS since June 2000 and were developed in recognition of the widespread interest in the extent to which the impact of price change varies across different groups of households in the Australian population.
ALCIs are prepared for four types of Australian households. Households have been categorised based on the principal source of household income, derived from the 2015-16 Household Expenditure Survey (HES):
| Household type | Principal source of income |
|---|---|
| Employee households | Wages and salaries |
| Age pensioner households | Age pension or veterans’ affairs pension |
| Other government transfer recipient households | Government pension or benefit (other than the age pension or veterans’ affairs pension) |
| Self-funded retiree households | Superannuation or property income and where the HES has defined the reference person is 'retired' (not in the labour force and over 55 years of age) |
The PBLCI was introduced in the June 2009 quarter and is a measure of the effect of changes in prices on the out-of-pocket living expenses experienced by the following two groups of households in the Australian population:
- Age pensioner households
- Other government transfer recipient households.
The ABS publishes these indexes quarterly in Selected Living Cost Indexes, Australia.
Main conceptual differences between the CPI and the Selected Living Cost Indexes
A living cost index reflects changes over time in the purchasing power of the after-tax incomes of households. It measures the impact of changes in prices on the out-of-pocket expenses incurred by households to gain access to a fixed basket of consumer goods and services. The Australian Consumer Price Index (CPI), on the other hand, is designed to measure price inflation for the household sector as a whole and is not the conceptually ideal measure for assessing the changes in the purchasing power of the disposable incomes of households.
The PBLCI represents the conceptually preferred measure for assessing the impact of changes in prices on the disposable incomes of households whose income is derived principally from government pensions or benefits. In other words, it is particularly suited for assessing whether the disposable incomes of these households have kept pace with price changes.
There are a number of ways to construct a consumer price index with at least three widely accepted alternative approaches used by national statistical agencies:
- Acquisitions approach: changes in the prices of goods and services acquired (actually received)
- Cost of use approach: changes in the prices of goods and services used (consumed)
- Outlays approach: changes in the prices of goods or services for which payments were made to gain access to goods and services.
A living cost index is intended to be used to assess changes over time in the purchasing power of the after-tax incomes of households. It is therefore concerned with measuring the impact of changes in prices on the out-of-pocket expenses incurred by households to gain access to consumer goods and services. The item coverage of such an index is determined by reference to the actual money outlays of households on all but investment items.
From the September 1998 quarter, the CPI has been constructed using the acquisitions approach. The SLCIs have been constructed using the outlays approach.
In practice, for most goods and services purchased by the reference population, outlays and acquisitions occur within a relatively short space of time. There are three areas of expenditure in which these conceptual approaches provide significantly different results:
- purchase of dwellings
- purchase of durable items
- financial services and the use of credit.
Under the acquisitions approach used in the CPI, the net purchase of housing, the increase in volume of housing due to renovations, extensions and other costs (e.g. maintenance costs and council rates) are included for all owner-occupied housing. Changes in rental are measured for that part of the population that resides in rented dwellings. The CPI excludes interest paid on mortgages.
Under the outlays approach used in the SLCIs, the changes in the amount of interest paid on mortgages (measured as part of Insurance and financial services) and other costs (e.g. maintenance costs and council rates) are included for owner-occupied housing. In addition, changes in rental are measured for that part of the reference population that resides in rented dwellings. The SLCIs therefore exclude the net purchase of housing and the increase in volume of housing due to renovations or extensions.
Insurance (other than health insurance) is treated differently in the SLCIs. Under the acquisitions approach, the weight for insurance in the CPI relates to the net value of the service provided by the insurance company. In simple terms, the amount of premiums paid by households less the amounts reimbursed by way of claims. Under the outlays approach used for the SLCIs, the weight relates to the gross value of insurance premiums paid by households.
Financial services are treated differently in the SLCIs. The SLCIs include Mortgage interest and Consumer credit charges but exclude all Other financial services (i.e. Deposit and loan facilities (direct charges), and Other financial services).
The Selected Living Cost Indexes are published at the national level only.
Construction of the SLCIs is essentially undertaken in three stages. Stage one is concerned with calculating weights representative of the expenditure patterns of the defined household types. Stage two involves identifying appropriate measures of price change for each of the expenditure weights. The third and final stage is to use the weights to aggregate or average the price change measures.
From the December 2018 quarter, expenditure weights for all household types were typically updated each year in the December quarter. This is to ensure the weights used in the SLCI basket reflect contemporary household spending patterns. With the continued increase in Australians holidaying overseas, a partial update of the SLCI weights has been implemented in the September 2023 quarter. The comprehensive update to the weights usually done in December quarter each year will instead be implemented in the March 2024 quarter. The weights will continue to be updated in March quarters in future years. The Household Expenditure Survey (HES) is used in the years where it is available. In inter-HES years, Household Final Consumption Expenditure (HFCE) data from the National Accounts is used as the primary data source for updating the weights. This is consistent with the approach used for the CPI.
The SLCIs are published as totals for Australia only. The current weighting patterns for the SLCIs are available in the Data downloads section of the September 2023 quarter release of the Selected Living Cost Indexes, Australia.
The measures of price change, with the exception of those for Interest charges, are sourced from the CPI. Most item price indexes are constructed by direct reference to the equivalent CPI expenditure class indexes. Expenditure classes are the lowest level at which the expenditure weights are fixed for the duration of an index series.
Some item price indexes are constructed by reference to lower level CPI price data. Such exceptions relate to those items where it is known that different household types face different prices, such as subsidised public transport fares and pharmaceuticals for senior citizens.
The coverage of the expenditure weights for the PBLCI households (Age pensioner households and other households whose principal source of income is government benefits) is capital city level expenditures, consistent with the approach used for the CPI.
Price measures for interest charges are collected separately by the ABS on a basis comparable with those employed in the CPI prior to the September 1998 quarter.
From the September 2012 quarter, the SLCIs, like the CPI, use an index reference period of 2011-12 = 100.0. Prior to the September 2012 quarter, the LCIs for Employee, Age pensioner, Other government transfer recipient and Self-funded retiree households were published using an index reference period of June 1998 quarter = 100.0 and the Pensioner and beneficiary LCI was published using an index reference period of June 2007 quarter = 100.0.
Series links
The LCIs for Employee, Age pensioner, Other government transfer recipient and Self-funded retiree households are constructed using eight sets of weights. The first set of weights, based on the 1993-94 HES, is used to construct the indexes from the June 1998 quarter to the June 2000 quarter. The second set of weights, based on the 1998-99 HES, is used to construct the indexes from the September 2000 quarter to the June 2005 quarter. The third set of weights, based on the 2003-04 HES, is used to construct the indexes from the September 2005 quarter to the June 2011 quarter. The fourth set of weights, based on the 2009-10 HES, is used to construct the indexes from the September 2011 quarter to the September 2017 quarter. The fifth set of weights, based on the 2015-16 HES, is used to construct the indexes from the December 2017 quarter to the September 2018 quarter. The sixth set of weights, based on 2018-19 HFCE data from the National Accounts, is used to construct the indexes from the December 2020 quarter to the September 2021 quarter. The seventh set of weights, based on 2020-21 HFCE data from National Accounts, is used to construct the indexes from the December 2021 quarter to the September 2022 quarter. The eighth set of weights, based on 2021-22 HFCE data from National Accounts, is used to construct the indexes from the December 2022 quarter onwards.
The index for the PBLCI population subgroup is constructed using six sets of weights. The first set of weights, based on the 2003-04 HES at the national level, is used to construct the PBLCI from the June 2007 quarter to the June 2011 quarter. The second set of weights, based on the 2009-10 HES at the weighted average of the eight capital cities level, is used to construct the PBLCI from the September 2011 quarter to the September 2017 quarter. The third set of weights, based on the 2015-16 HES at the weighted average of the eight capital cities level, is used to construct the PBLCI from the December 2017 quarter to the September 2018 quarter. The fourth set of weights, based on the 2018-19 HFCE data from the National Accounts, is used to construct the indexes from the December 2020 quarter to the September 2021 quarter. The fifth set of weights, based on 2020-21 HFCE data from National Accounts, is used to construct the indexes from the December 2021 quarter to the September 2022 quarter. The sixth set of weights, based on 2021-22 HFCE data from National Accounts, is used to construct the indexes from the December 2022 quarter onwards.
Expenditure patterns of the selected household types
The SLCI weights reflect the relative expenditures of the SLCI population subgroups as a whole. The weights reflect average expenditure of households and not the expenditure of an 'average household'. The SLCI weights for the SLCI groups are shown in Table 2.
| Commodity group | PBLCI (%) | Employee (%) | Age pensioner (%) | Other government transfer recipient (%) | Self-funded retiree (%) | CPI (%) |
|---|---|---|---|---|---|---|
| Food and non-alcoholic beverages | 19.68 | 17.86 | 20.44 | 19.11 | 16.82 | 17.04 |
| Alcohol and tobacco | 8.56 | 8.25 | 6.20 | 10.61 | 7.62 | 7.74 |
| Clothing and footwear | 3.11 | 3.41 | 2.85 | 3.35 | 2.60 | 3.22 |
| Housing(c) | 22.01 | 13.75 | 19.25 | 24.52 | 11.89 | 22.18 |
| Furnishings, household equipment and services | 8.45 | 9.08 | 9.29 | 7.78 | 9.91 | 8.77 |
| Health | 7.63 | 6.18 | 11.88 | 4.38 | 11.62 | 6.22 |
| Transport | 9.52 | 10.57 | 9.72 | 9.47 | 11.05 | 10.69 |
| Communication | 3.03 | 2.22 | 2.49 | 3.02 | 2.47 | 2.18 |
| Recreation and culture | 9.11 | 12.05 | 10.68 | 7.87 | 18.79 | 11.87 |
| Education | 1.88 | 4.42 | 0.15 | 3.37 | 1.25 | 4.43 |
| Insurance and financial services(d) | 7.01 | 12.21 | 7.04 | 6.52 | 5.97 | 5.66 |
| All groups | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 |
- Based on 2015-16 Household Expenditure Survey (HES) data, 2021-22 Household Final Consumption Expenditure (HFCE) data and the September 2023 quarter partial weight update.
- Figures may not add up due to rounding.
- House purchases are included in the CPI but excluded from the population subgroup indexes.
- Includes interest charges and general insurance. Interest charges are excluded from the CPI and general insurance is calculated on a different basis.
There are some notable differences in the expenditure weights across the household types. For example, the proportion of expenditure allocated to Food and non-alcoholic beverages is highest for Age pensioner households. Employee households allocate a higher proportion of their expenditure to Education and Insurance and financial services (which includes Interest charges) than the other household types. Other government transfer recipients allocate higher proportions of their expenditure to Housing and Alcohol and tobacco than the other household types. Self-funded retiree households have higher relative expenditure on Recreation and culture than the other household types. Health costs account for a significantly higher proportion of expenditure of Age pensioner and Self-funded retiree households than the other household types.
Rounding
The SLCIs use a hierarchy of rounding procedures to ensure consistency between published index numbers and percentage changes. However, rounding differences can arise in the 'points contributions' published because of the different levels of precision required in those data.