General research for information only — not legal, tax, or investment advice. Cambodian law and markets change; figures are indicative, so verify current detail with a qualified local professional before you act.
No sales tool moves Cambodian off-plan units like the guaranteed rental return: a contractual promise of, say, 8–12 percent a year for the first three to five years, sometimes printed bigger than the price. It works because it converts the buyer’s hardest question — will this actually rent? — into a number with a signature under it. This piece takes the guarantee apart: what stands behind it, what it really costs you, and how to test one before you rely on it.
Start with the market the guarantee is promising to beat
A guarantee only means something relative to what the market would pay anyway. At the gross level, Cambodia’s average advertised yield ran about 7.68 percent in Q3 2025 [S-090], and portals advertise 6.5–8 percent — figures the trade itself flags as optimistic [S-026]. After vacancy, management, fees, and rental tax, our honest yield arithmetic puts typical net outcomes around 3.5–5 percent — matching what completed buildings actually report: one of Phnom Penh’s larger delivered projects carries an expected return of about 5 percent at roughly 70 percent occupancy [S-067].
Hold that against the pitch. A “guaranteed 10 percent” is promising double the realistic net market outcome. Money does not appear from nowhere, so the first question is never whether you’ll receive the payments — early payments almost always arrive. It is what is funding them.
What actually funds a rental guarantee
There are only three possibilities, and only one of them is good news:
- The building’s own rental income. The honest case — possible when the guarantee is modest and the building genuinely rents. At realistic net yields, that caps an honest guarantee somewhere near 5 percent [S-090] [S-067]. Anything well above that is not coming from tenants.
- Your own money, returned to you. The standard case. The guarantee is priced into an inflated purchase price, and the developer hands part of your capital back in instalments dressed as yield. You will meet the price premium again at resale, when the next buyer prices the unit on real rents.
- The developer’s balance sheet. The fragile case. The promise is only as good as the company behind it — and that company’s solvency is exactly what an off-plan buyer is already exposed to. Sihanoukville’s hundreds of stalled towers are the standing monument to what happens when sales-funded models stop selling [S-034] [S-035].
Note what all three have in common: none of them improves the building. A guarantee changes who carries the rental risk for a few years; it does not create tenants.
The exit problem nobody prices
Guaranteed-return units carry a second, quieter cost: the guarantee expires; the price premium does not refund itself. When the support period ends, the unit re-prices on real rents — the 3.5–5 percent world [S-090] — and the resale buyer pool in an oversupplied segment is thin to begin with. Buyers who underwrote the guarantee rather than the building routinely discover the exit is where the promise’s true cost was hiding. Our off-plan vs resale analysis covers why pricing the exit before the entry is the discipline that matters.
How to test a guarantee in five questions
Treat the guarantee as a credit instrument and underwrite it like one:
- Who exactly is the guarantor? The developer? A management company with thin capital? An SPV that can be wound up? Name the entity and check it.
- What funds it? Ask to see the assumed rent, occupancy, and fee schedule behind the guaranteed number. Honest operators have one; promoters do not.
- What is the un-guaranteed price? Ask what the unit costs without the guarantee. The discount you are offered is the promoter’s own estimate of what the promise is worth — usually your money, pre-paid.
- What does the contract say when payments stop? A guarantee without enforceable default consequences in the SPA is marketing. Watch for the penalty-clause asymmetry common in Cambodian drafts [S-095], and read our SPA guide before signing.
- Does the deal survive at market rents? Model the purchase at 3.5–5 percent net [S-090]. If it only works at the guaranteed number, the building is not the investment — the promise is.
The one-line version
A rental guarantee is a loan of confidence from a counterparty you have not underwritten, priced into an asset you will one day sell without it. Value the building at market rents, value the guarantee at the guarantor’s creditworthiness — and if either number does not survive scrutiny, our red-flags checklist already told you what to do.
Sources
- [S-026] CBRE / market commentary — advertised 6.5–8% yields flagged by the trade as optimistic; Phnom Penh oversupply context.
- [S-034] / [S-035] RFA / archive — Sihanoukville’s stalled-tower legacy (~360–400 unfinished buildings) and the sales-funded development model behind it.
- [S-067] Creed / Bodaiju delivery record — expected rental return ≈5% at ~70% occupancy on a completed, delivered project.
- [S-090] Global Property Guide — Cambodia rental yields — average gross yield 7.68% (Q3 2025); net typically 1.5–2 points below gross.
- [S-095] IPS Cambodia — the SPA in Cambodia — penalty-clause asymmetry; contractual enforcement context.