Cap rate, NOI & IRR — the three numbers that decide a commercial deal.
Every commercial real estate pitch leans on one of these three metrics, and most investors only half-understand how they connect. This guide explains Net Operating Income (NOI), capitalization rate (cap rate), and Internal Rate of Return (IRR) in plain English, walks through a full worked example on a hypothetical Bangkok office building, and covers the Thailand-specific factors — foreign ownership structure, financing, currency — that change the math. Data and tools, never paid placement.
NOI is what a property earns after operating costs but before debt and tax. Cap rate is NOI divided by price — a one-year snapshot used to value and compare deals. IRR is the annualized return across the full holding period, accounting for the timing of every cash flow including the eventual sale. Use cap rate for a quick first screen; use IRR to judge the whole investment.
Living Summary
Cap Rates & Underwriting in Thailand Commercial Real Estate
Editorial analysis compiled and periodically refreshed by BAANLYY’s research team — not a live data feed.
Are Thailand commercial cap rates trending up or down?
Directionally mixed. Prime Bangkok CBD office and well-let retail near BTS/MRT stations have generally compressed over the past decade as transit access became a core valuation factor, while secondary-location retail, older office stock, and hospitality assets have seen cap rates widen or stay elevated as investors price in higher vacancy and renovation risk. There is no single national cap rate trend — asset class and micro-location dominate the picture.
Who is this guide written for?
Foreign investors and analysts evaluating a specific Thailand commercial deal who need to understand how NOI, cap rate and IRR connect — and how Thailand-specific factors like leasehold structure, limited foreign financing, and currency risk change the underwriting math versus a familiar home market.
What's the biggest shift underwriters are watching right now?
The post-pandemic rate cycle has pushed global capital costs up, putting upward pressure on required cap rates across most asset classes, even as newer institutional-grade categories (logistics/warehouse, data centers) draw fresh investor interest. Buyers underwriting a Thai deal today should stress-test exit cap rate assumptions against this wider-rate environment rather than relying on pre-2022 benchmarks.
Analysis last reviewed 2026-07-04.
Try it yourself
Run your own price, income and financing assumptions through BAANLYY's free commercial investment calculator to see NOI, cap rate, cash-on-cash return and an IRR estimate side by side.
Commercial real estate investors lean on three numbers, and each answers a different question. NOI answers: “how much does this property actually earn from operations?” Cap rate answers: “based on that income, is the asking price reasonable compared to similar deals?” IRR answers: “over the years I actually plan to hold this, accounting for when every dollar (or baht) comes in and goes out, what is my real annualized return?”
They build on each other in that order. NOI is the foundation — get it wrong and both cap rate and IRR are wrong too. Cap rate is a fast, one-year comparison tool. IRR is the full-picture number for a specific hold period, financing structure and exit assumption. None of the three is “better” — they are used at different stages of underwriting a deal.
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Net Operating Income (NOI) — the foundation number
NOI is the income a property generates from its operations, before financing and tax are considered:
NOI = (Gross Potential Rent − Vacancy & Credit Loss) − Operating Expenses. Operating expenses typically include property management, insurance, routine maintenance and repairs, common-area/juristic-person fees, security and utilities for shared space, and the annual Land and Building Tax.
NOI deliberately excludes debt service (loan interest and principal), income tax, and large capital expenditure such as a roof replacement or major renovation — those are financing, tax and capital decisions specific to the owner, not the property's operating performance. Because NOI strips those out, it is the number that lets you compare two very differently-financed properties on a like-for-like basis.
NOI reporting is not always consistent between sellers, brokers and appraisers — some quietly bury a capital item inside “maintenance,” or use an optimistic vacancy assumption. Always ask for the itemized rent roll and expense schedule behind a headline NOI figure rather than accepting the number as given.
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Cap rate — a one-year snapshot for value and comparison
The capitalization rate (cap rate) expresses NOI as a percentage of the property's value or purchase price:
Cap rate = (Annual NOI ÷ Purchase Price) × 100. Rearranged, it also gives a quick valuation tool: Value = NOI ÷ Cap Rate — useful for estimating what a property should be worth given its income and a market cap rate for that asset class.
A lower cap rate generally signals the market sees the asset as lower-risk or higher-growth (prime CBD office, well-let retail in a strong catchment); a higher cap rate generally signals higher perceived risk or slower growth expectations (secondary locations, older buildings, single-tenant industrial with lease-rollover risk). Cap rate is best used to compare similar assets in similar locations at a similar point in time — it is a snapshot, not a forecast, and it says nothing about how income or value might change over a multi-year hold.
This is exactly where cap rate's usefulness runs out and IRR takes over.
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Worked example — NOI and cap rate on a hypothetical Bangkok office building
Purchase price: 120,000,000 baht. Gross potential rent (Year 1): 12,000,000 baht/year. Vacancy & credit loss allowance: 8% → effective rent = 11,040,000 baht. Operating expenses (management, insurance, maintenance, common fees, Land and Building Tax): 3,000,000 baht. NOI (Year 1) = 11,040,000 − 3,000,000 = 8,040,000 baht. Cap rate = 8,040,000 ÷ 120,000,000 = 6.7%.
This tells you the building is priced to return 6.7% of its purchase price in year-one operating income, before financing and tax. Whether 6.7% is attractive depends entirely on what comparable Bangkok office assets are trading at — the number means nothing in isolation. All figures here are illustrative for teaching the formula, not a market quote.
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Internal Rate of Return (IRR) — the full-picture number
IRR is the annualized rate of return that makes the net present value of every projected cash flow — the initial investment, each year's income, and the eventual sale proceeds — equal to zero. In plain terms: it is the single growth rate that, if applied to your invested capital every year, would produce exactly the cash flows you project over the actual holding period.
Unlike cap rate, IRR captures the timing of cash flows (money now is worth more than the same money in five years), changes over time (rent growth, vacancy shifts, a renovation year), and the exit (what the property sells for at the end of the hold, which is usually the single largest cash flow in the whole projection). Because it needs a full projected cash-flow schedule rather than a single year's figures, IRR is normally calculated with spreadsheet software or a financial calculator rather than by hand — there is no simple algebraic formula, only an iterative solve.
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Worked example — IRR on the same building, five-year hold
Continuing the example above: the investor buys for 120,000,000 baht, holds for five years, assumes 3% annual NOI growth, and sells at the end of year five based on a slightly higher (more conservative) exit cap rate of 7.0% applied to the following year's projected NOI, less 3% selling costs.
Year 0: −120,000,000 baht (purchase) Year 1 NOI: 8,040,000 baht Year 2 NOI: 8,281,200 baht Year 3 NOI: 8,529,636 baht Year 4 NOI: 8,785,525 baht Year 5 NOI: 9,049,091 baht, plus sale proceeds Year 6 NOI (for exit calc): 9,320,564 baht → Terminal value = 9,320,564 ÷ 7.0% = 133,150,908 baht, less 3% selling costs = 129,156,381 baht net sale proceeds Year 5 total cash flow: 9,049,091 + 129,156,381 = 138,205,472 baht Result: IRR ≈ 8.4% over the five-year hold.
Notice the IRR (8.4%) is higher than the entry cap rate (6.7%) here — that gap comes entirely from assumed rent growth and a profitable exit. Change either assumption (slower rent growth, a higher exit cap rate reflecting market softening, an extra year of vacancy) and the IRR moves accordingly, which is exactly why IRR projections should always be stress-tested against a more conservative growth and exit scenario, not taken at the base case alone.
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Cap rate vs IRR — when to use which
Use cap rate for a fast first screen, comparing multiple deals of a similar type at a point in time, or as a shorthand valuation check (value = NOI ÷ cap rate).
Use IRR once you have a specific holding period, financing plan and exit assumption, and want to judge the deal as a whole investment rather than a single year's yield.
Use both together — a low entry cap rate can still produce a strong IRR if growth and exit assumptions are realistic; a high entry cap rate can produce a weak IRR if the underlying asset is in decline. Neither number alone tells the full story.
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Thailand-specific factors that change the math
Ownership structure — foreign individuals generally cannot own land outright in Thailand; commercial deals are commonly structured as long-term leasehold (often up to 30 years) or through a Thai limited company. This affects financing, exit liquidity and how a terminal value should be modeled — a leasehold interest with a shortening remaining term is not the same asset ten years from now as it is at purchase.
Financing availability — commercial mortgage financing for foreign buyers is limited in Thailand, so many deals are effectively all-cash. This removes leverage from the return calculation (no debt service to subtract, but also no leverage boosting equity returns), which materially changes cash-on-cash math versus markets where commercial leverage is routine.
Currency risk — income and sale proceeds in Thai baht need to be converted back to an investor's home currency at whatever the exchange rate is at the time; a strong IRR in baht terms can look very different once currency movement is factored in.
Tax treatment — rental income, capital gains and withholding tax rules in Thailand differ by ownership structure (individual, company, or leasehold) and should be built into a real cash-flow projection rather than assumed away.
Data availability — Thailand's commercial transaction data is less centrally published than in mature markets; underwriting a cap rate or exit assumption often relies on broker relationships and direct comparable research rather than a single public benchmark source.
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Common mistakes investors make with these metrics
Accepting a broker's or seller's NOI figure at face value without reviewing the itemized rent roll and expense schedule behind it.
Comparing cap rates across different asset classes or locations as if they were interchangeable.
Assuming rent growth and a favorable exit cap rate without stress-testing a more conservative scenario.
Ignoring the ownership structure (leasehold term remaining, company structure) when projecting a terminal sale value.
Treating a high projected IRR as automatically “the better deal” without checking the absolute capital at risk or the assumptions driving it.
Leaving currency risk and Thailand-specific tax rules out of the projection entirely.
Growth Trajectory
Evolution of Commercial Valuation Practices & Benchmarks in Thailand
1997–98
Asian Financial Crisis
Distressed commercial asset sales during the crisis produced Thailand's first widely referenced pricing data, pushing cap-rate-style benchmarking into standard local underwriting practice.
2008–09
Global Financial Crisis
International capital pulled back from Bangkok office and retail, widening cap rates and sharpening the pricing gap between prime CBD assets and secondary-location stock.
2013–19
Mass-transit expansion
Rapid BTS and MRT network growth compressed cap rates for well-located retail and office near new stations, embedding transit proximity as a core valuation factor still used today.
2020–21
COVID-19 pandemic
Hospitality and retail cap rates widened sharply on occupancy and income uncertainty, while industrial and logistics assets held comparatively steady on resilient e-commerce demand.
2022–24
Post-pandemic rate cycle
Global interest rate increases put upward pressure on required cap rates across most asset classes, while Thailand's foreign-ownership and leasehold structures kept much of the market financing-constrained and largely all-cash.
2025–26
Current cycle
Investors increasingly pair a snapshot cap rate with multi-year IRR modeling, and newer institutional-grade categories — logistics/warehouse and data centers — are drawing fresh underwriting attention alongside traditional office and retail.
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Frequently asked
What is a good cap rate for commercial property in Thailand?There is no single “good” cap rate — it depends on asset class, location and risk. As a general pattern, prime Bangkok office and retail assets in strong locations tend to trade at lower cap rates (reflecting lower perceived risk and stronger liquidity), while industrial/warehouse, secondary-location retail, and hospitality assets typically trade at higher cap rates to compensate investors for higher operating or demand risk. Always compare a cap rate against recent comparable transactions for the same asset class and area rather than a single national benchmark, and treat any cap rate quoted by a seller or broker as a starting point to verify, not a fact.
What is the difference between NOI and cash flow?NOI (Net Operating Income) is income after operating expenses but before debt service, income tax, and capital expenditures — it measures how the property itself performs, independent of how it is financed. Cash flow (sometimes called cash flow before tax, or levered cash flow) takes NOI and subtracts loan payments (principal and interest), giving what the owner actually receives. Two identical buildings with identical NOI can have very different cash flow depending on how much debt is used and on what terms, which is why NOI is the number used to value a property and compare it across deals, while cash flow is the number relevant to a specific owner's financing.
Why does IRR matter more than cap rate for a multi-year hold?Cap rate is a snapshot — it tells you the return implied by year-one income relative to price, as if you bought and held forever with no changes. IRR accounts for the full timing and size of every cash flow over the actual holding period, including rent growth, vacancy swings, capital expenditure, and the sale proceeds at exit — and it discounts each cash flow for the time value of money. A property with a modest cap rate today but strong projected rent growth and a profitable exit can produce a healthy IRR; a property with a high cap rate today but a value-eroding trend can produce a poor IRR. Cap rate is useful for a quick first screen and comparing similarly-timed deals; IRR is the metric for judging a full investment thesis.
What operating expenses should be included in an NOI calculation in Thailand?Typical inclusions are property management fees, building insurance, routine maintenance and repairs, the common-area/juristic-person fee where applicable, security and utilities for common areas, and the annual Land and Building Tax. Typical exclusions are debt service (loan principal and interest), income tax on the owner's profit, and capital expenditure such as a major renovation or structural repair (these are usually modeled as separate line items, not folded into NOI). Because reporting conventions vary between sellers, brokers and appraisers, always ask for the itemized expense schedule behind any NOI figure you're given rather than accepting a single headline number.
Can foreigners calculate returns on Thai commercial property the same way as elsewhere?The formulas for NOI, cap rate and IRR are universal, but the inputs need Thailand-specific adjustment. Foreign individuals generally cannot own land outright and commercial deals are frequently structured as long-term leasehold (typically up to 30 years, renewable by agreement but not guaranteed) or through a Thai limited company — both affect financing availability, exit liquidity, and how a terminal value should be estimated. Financing for foreign buyers is limited, so many commercial deals are effectively all-cash, which changes the cash-on-cash math versus a market with readily available commercial mortgages. Currency risk (THB versus the investor's home currency) and Thailand's own tax treatment of rental income, capital gains and withholding also need to be built into the projection, not assumed away.
Is a higher IRR always the better investment?Not by itself. IRR does not capture the size of the investment (a small deal can show a very high IRR on a tiny amount of capital) or the risk taken to achieve it — aggressive rent growth or exit cap rate assumptions can inflate a projected IRR without changing the underlying risk of the deal. IRR is best used alongside the absolute NOI and equity multiple, a sensitivity check on the growth and exit assumptions, and a comparison against what a lower-risk alternative (such as a bank deposit or government bond) would return over the same period, so a number that looks attractive on paper can be pressure-tested before committing capital.
Run your own numbers before you rely on anyone else's. Talk to BAANLYY about commercial inventory, market guidance and connecting with qualified professionals.
Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.
General information only — not financial, investment, tax or legal advice. All figures in this guide's worked examples are illustrative and hypothetical, not quotes, appraisals or projections of actual return. Cap rates, NOI, financing terms, tax treatment and market conditions vary by asset, location and structure and change over time. Confirm current comparable transactions, financing options and your own tax position with licensed Thai professionals before investing. BAANLYY never takes paid placement.