Contents
Singapore’s headline inflation covers the full consumer price index (CPI) basket. MAS Core Inflation excludes accommodation and private transport. Read both, but distinguish between them: they measure different sets of prices, not competing estimates of one identical basket. [1]
The practical question is what moved. Did prices in the core basket change, or did accommodation and private transport push the broader reading in another direction? A single unlabeled “inflation” number cannot tell you.
Start with the exclusions
| Measure | Coverage | Reading question |
|---|---|---|
| CPI-All Items inflation | The whole consumer-price basket | How did the broad basket change? |
| MAS Core Inflation | Excludes accommodation and private transport | How did prices change outside those two groups? |
| CPI less Imputed Rentals for Housing | Removes imputed rentals, not the whole accommodation group | What changes when that non-cash housing component is left out? |
These are separate published measures. Actual rent remains in CPI less Imputed Rentals for Housing, so this series is not another name for MAS core. [2]
Food is not excluded from MAS core. Nor is there a blanket exclusion of energy: the core categories include electricity and gas. Do not import a foreign definition of “core” into a Singapore release. [2]
Why leave accommodation and private transport out?
MAS says these groups are volatile and strongly affected by supply-side administrative policies. It uses core as an important indicator of underlying inflation, while also monitoring headline inflation and other economic information. The exclusions do not make rent or car costs irrelevant to the households paying them. [1]
Accommodation includes actual rentals, imputed rentals and housing maintenance and repairs. Imputed rent estimates the housing services owner-occupiers consume using comparable market rents. It is not an extra cash bill sent to the homeowner, and a home's purchase price is not the same thing as this CPI component. [3]
For the separate question of how Singapore conducts monetary policy, see the S$NEER framework guide. The distinction here is between price measures, not a forecast of MAS’s next decision.
Read the gap without inventing a cause
As an illustrative interpretation, headline inflation could slow while core inflation speeds up if movements in excluded components sufficiently offset the core increase. That is a possibility arising from the different coverage, not a claim about a particular month.
CPI weights reflect the relative importance of goods and services in household spending; the components do not count equally. [3]
To explain an actual release, use its component discussion and contribution chart. Do not simply subtract two reported inflation rates and call the result “car inflation” or “rent inflation.” Those components are not the same basket as core, and their separate rates are not interchangeable with contributions to the total.
A useful reading order is:
- Copy the reference month and publication date.
- Label each number CPI-All Items, MAS core, or another named series.
- Match the comparison period before comparing changes.
- Read which components the release says drove the movement.
- Separate that observation from any forecast in the outlook section.
For example, the official August 2026 release, published on 23 September 2026, reports both monthly and yearly changes. Its summary and component discussion serve different purposes: one gives the readings; the other explains their drivers. Use that structure rather than treating every percentage on the page as directly comparable. [2]
Why your bills may tell a different story
CPI describes resident households collectively. Your own spending mix may put more weight on the items whose prices rose fastest. Neither the headline nor core measure is a personalised household budget. [3]
Ask which expense matters to your question. If you are examining a rent increase, removing accommodation does not make that increase disappear from your finances. If you are comparing published inflation figures, however, adding your rent bill to core would create a different calculation, not repair the official series.
Common questions
Is MAS Core Inflation always lower than headline inflation?
No such ranking follows from the exclusions. The comparison depends on the price movements and weights of the included and excluded components. “Core” is a coverage label, not a promise of a lower number.
Does lower inflation mean prices fell?
Not necessarily. A slower positive rate still describes an increase over its comparison period. Falling prices require a negative change in the relevant index for that period.
Where should I find the latest figures?
Use SingStat’s CPI releases and data and check the reference month. This guide explains the measures; it is not a live inflation dashboard. [4]
Can I compare this with US core CPI?
Only after checking the exclusions. The US CPI reading guide covers that separate series. A shared word does not guarantee shared coverage.
Keep learning
Explore more educational guides. These links do not open trading markets.
Sources and scope
- MAS: How do we measure inflation?, updated 13 August 2026.
- MAS and MTI: Consumer Price Developments in August 2026, published 23 September 2026; summary, annex and category tables.
- SingStat: Our Data Explained — Consumer Price Index.
- SingStat: Latest News & Data — Consumer Price Index.
Sources checked on 22 October 2026. The possible divergence described above is an illustrative interpretation, not a current data claim. This educational guide does not recommend a policy decision, an investment or a trade.
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