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Glossary · Investor terms

Vacancy rate

By Winfred Quek · CEA R073319H · Singapore property glossary

What is vacancy rate for a rental property? Vacancy rate is the share of time, or of units in a building or area, that sits empty and earns no rent. For a single landlord it usually means how many months a year a unit has no tenant, and it directly reduces rental income and cash flow.

What it is

For a single unit, vacancy rate is simply the months it sat vacant in a year divided by twelve. At a market level, the same idea can describe the share of listed units in a building or district without a tenant, which is a useful signal of oversupply or weak demand in that specific pocket, though it should never be assumed to apply evenly across every project or town.

How to work it out

Track the real gap between one tenancy ending and the next one starting, including time needed for repairs, cleaning and marketing the unit again. A unit vacant for one month a year already has an effective vacancy rate of about 8 percent, which quietly reduces the annual rental yield most quick calculations assume away.

A simple illustration

A unit quoted at $3,000 a month implies $36,000 a year if fully tenanted, but if it actually sits empty for one and a half months while a new tenant is found, actual collected rent for the year is closer to $31,500, illustrative numbers only. That gap is vacancy rate showing up directly in cash flow, not a defect in the unit itself.

What beginners get wrong

A common mistake is quoting gross yield off the advertised rent as though it will be collected every single month of every year without a gap. Another is forgetting that holding cost, mortgage interest, property tax, maintenance, keeps running during a vacancy even with no tenant paying it down. A third is underestimating how location, unit condition, and pricing above the market all lengthen the time a unit sits empty.

What to check

Check how the unit is priced against comparable rentals nearby before assuming a quick tenancy, check the realistic time to find a tenant for that specific building or estate, and check whether cash flow modelling already assumes at least a small vacancy buffer rather than 100 percent occupancy year round.

Have a question about your own numbers?

Winfred runs the real figures for your situation before you rely on a rule of thumb. This is general education, not personalised advice, book a call to talk through your own case.

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Winfred Quek is an Associate Marketing Consultant at Crestbrick Pte Ltd (CEA Licence No. L31010886H). CEA R073319H. This page is general property and investing education only and does not constitute financial, investment, or legal advice. Verify current figures with IRAS, HDB, CPF Board, or MAS before making any decision.