Cambodia: Housing Prices, Inflation and Purchasing Power

A housing-market headline usually reports the nominal move: the index rose or fell from a month or a year earlier. That is only one layer of the buyer’s picture. When consumer prices are moving at the same time, an unchanged nominal housing price does not preserve the same purchasing power. This page therefore keeps two paths side by side: the official residential property price index and the same series deflated by a matching consumer price index.

Deflation is not a way to “correct” a transaction price or estimate fair value. It answers a narrower question: how did the broad housing-price measure move relative to the consumer-price level over the same dates? A positive nominal move can become a negative real move if consumer prices rise faster. When consumer prices are flat or falling, the opposite can happen and the real decline may be smaller than the nominal one.

There is also a third lens for many Cambodia buyers: the currency in which they hold wealth and settle the deal. A buyer funded in US dollars can experience a different purchasing-power outcome from a local household looking at consumer prices. That currency layer should not be smuggled into the CPI-deflated series. Local inflation, the exchange rate and the buyer’s own investment return are distinct measurements, so the calculation below isolates housing versus consumer prices first and treats FX separately.

Even after deflation, the result remains a market index rather than an investment statement. It excludes rent, service charges, taxes, financing, transaction costs and the eventual sale price of one unit. A reading of 88.0 therefore does not mean that every Phnom Penh apartment delivered a 12% real loss to its owner. It means the selected broad housing index lagged the selected consumer-price index by that amount over the defined window.

The biggest methodological trap is to take the nationwide RPPI and divide it by any series labelled “Cambodia inflation.” Geographic coverage matters more than the label on a data portal. The IMF’s 2026 data-quality review notes that the existing CPI price collection was centred on Phnom Penh and that extending price collection to the provinces was part of the work required for a genuinely national CPI. That makes the historical city series unsuitable as an automatic deflator for a nationwide housing index.

The main comparison therefore uses Phnom Penh RPPI against Phnom Penh CPI. The national RPPI can still describe nominal market direction, but combining it with a city-only deflator would manufacture a “real Cambodia house-price index” that the underlying data do not support. A shorter matched series is more informative than a longer series in which numerator and denominator refer to different places.

The calculation also needs CPI index levels, not just the headline year-on-year inflation rate printed beside them. Subtracting an inflation percentage from a housing-growth percentage is only a rough shortcut for a single small move and becomes inaccurate over multiple periods. Both series here are rebased to December 2024 = 100, and the real index is calculated as the housing-index change divided by the CPI change. The fact that the published RPPI uses 2020=100 while the CPI uses an October–December 2006 base is not a problem once both are rebased to the same actual month.

December 2024 is also a practical starting point for the published comparison because NBC says its RPPI methodology was improved and previously published values were revised. The table uses the revised path rather than stitching older releases onto the newer series. Monthly CPI levels are aligned to the same observation months, which matters in early 2026 when consumer-price pressure accelerated and an annual average would blur the timing.

CPI still measures the consumer basket, not the cost of owning property and not the cost of building it. Its job on this page is deliberately narrow: provide a consistent purchasing-power benchmark for the same geography and period. That is enough to build an inflation-adjusted market index; it is not enough to conclude that homes became easier to buy, that an investor earned a real return, or that a particular apartment is fairly priced.

Phnom Penh. Both series are rebased to December 2024 = 100. The nominal column is the revised Phnom Penh RPPI on that common base; “After CPI” divides the same housing path by the change in Phnom Penh CPI. The latest common calculation point is May 2026.

Across the displayed window, the nominal and real paths differ in more than magnitude; at several points they change the interpretation of the same market move. The revised Phnom Penh RPPI fell from 106.9 in December 2024 to 102.9 in March 2025. Consumer prices eased slightly over those same months, so the common-base nominal index stood at 96.3 while the deflated index was a little higher at about 97.0. Inflation adjustment softened the housing decline at that stage instead of making it look worse.

By June, the rebased nominal series had slipped to 94.9 and the real series to 95.9. Housing prices then recovered part of that loss: September’s nominal reading is 97.6 on the common base. CPI had by then moved back above its December level, leaving the real index around 97.0. The episode shows why “prices rebounded” is incomplete on its own. The housing index did recover from its June low, but consumer prices were also rising again.

The gap widened toward the end of 2025 and into 2026. December 2025 sits at 95.6 nominally and 94.5 after CPI. By February 2026 the figures are 92.5 and 90.4. In May, Phnom Penh RPPI recovered to 99.92 on NBC’s published 2020=100 scale, equivalent to 93.5 when rebased to December 2024. Yet Phnom Penh CPI had risen from 209.0 to 221.92 over the full base-to-May window, pulling the real housing index down to roughly 88.0.

That produces a clear end-to-end result. From December 2024 to May 2026, Phnom Penh’s nominal RPPI fell about 6.5% while the consumer-price level rose about 6.2%. Combining the two movements gives an inflation-adjusted decline of roughly 12.0%. The most recent three months make the distinction even sharper: between February and May the RPPI rose about 1.0%, but CPI rose about 3.7%, so the real index still fell by about 2.6%. A nominal bounce was not the same thing as a recovery in purchasing-power terms.

The coverage boundary matters. The RPPI is a quality-adjusted measure derived from housing-loan data supplied by financial institutions. The IMF has noted that this source does not capture cash purchases, developer-financed transactions or purchases financed through foreign banks. The 12% real decline therefore describes the official index within its data coverage; it is not a statement that every apartment, district or financing route in Phnom Penh delivered the same result.

Revision history matters too. If an older report shows a different RPPI value for the same month, the two numbers should not be averaged. The current revised NBC series takes precedence here because it applies the updated methodology consistently across the comparison window. That keeps the comparison internally consistent instead of mixing statistical vintages.

In Cambodia, the natural follow-up is often: what about the US dollar? That question has to be kept separate from inflation adjustment. Phnom Penh CPI tracks the local consumer basket and is useful for asking how housing prices moved relative to the city’s general price level. A buyer whose wealth is measured in USD is asking something else: how many units of the buyer’s base currency were required at entry, and how many come back through rent and an eventual sale.

The KHR/USD rate does not automatically turn the RPPI into a dollar-return series. RPPI is a relative index produced from underlying property observations and a quality-adjustment model. A valid currency conversion would require clarity on how transaction prices are recorded and how currency is treated before the index is constructed. The public methodology available for this exercise does not provide enough basis to justify simply multiplying or dividing the finished RPPI by the monthly exchange rate; doing so could double-count currency effects or change the meaning of the measure.

The FX layer is therefore left as a separate analytical step. If an actual purchase price, instalments, rent and resale proceeds are all denominated in USD, the buyer’s result should be calculated from those USD cash flows. If some costs are paid in KHR, those specific cash amounts can be translated at the relevant exchange rate for the transaction or scenario. That approach is more defensible than manufacturing a “USD RPPI” from an index that was not published for that purpose.

For an international buyer, the distinction is practical. A real-index reading of 88.0 says that the official Phnom Penh housing series lagged the city’s CPI by roughly 12% from December 2024 to May 2026. It does not say that a dollar-funded buyer lost 12%. The buyer-currency outcome only exists once the actual entry price, currency mix, rents, expenses and exit value are known.

A falling deflated housing index is tempting to translate as “homes became more affordable,” but that is a different measurement. CPI tells us about the purchasing power of money against a consumer basket. A household does not buy a home with an abstract basket; it buys with income, accumulated equity and, when credit is involved, the ability to service a specific loan under specific terms.

Consider two periods with the same real RPPI. In one, wages have risen faster than prices, mortgage costs have eased and the required down payment is manageable. In the other, incomes are flat, borrowing costs are higher and lenders require more equity. The inflation-adjusted housing index can be identical while purchase affordability is very different. That is why a real RPPI cannot substitute for a price-to-income measure or a debt-service calculation.

The boundary is even clearer for investment returns. An owner’s outcome combines the asset price with rent, vacancy, service charges, repairs, taxes, commissions, financing and the eventual resale price. CPI can be useful later to express that full cash result in purchasing-power terms, but the return has to be calculated first. Deflating a broad RPPI and calling the result a condo’s “real return” skips most of the economics of ownership.

The same caution applies to fair value. A weakening real RPPI can tell a buyer that the market backdrop is softer than a nominal price list might suggest, and that can justify a closer look at the seller’s position. It cannot set the price of a unit. Negotiation still depends on genuinely comparable properties: the same micro-location, building type, completion stage, size, floor, view, condition, title and payment terms.

The useful conclusion is deliberately narrow. Over the matched Phnom Penh window, the official housing index fell further relative to consumer prices than the nominal line alone suggests. That is evidence about the market path and the purchasing power of money. Whether a household can buy more easily, or an owner earned a positive real return, requires a different dataset tied to that household or that property.