Work out a property's vacancy rate from vacant days over the period — and the rent it cost you. Enter vacant days, total available days and the monthly rent.
Vacancy rate = vacant days ÷ total available days × 100. Lost rent here uses an average 30.42-day month. Some owners measure vacancy by units rather than days.
Vacancy rate is the share of time (or units) a rental sits empty. Even a few weeks between tenants can wipe out a month's profit, so it feeds directly into realistic yield and cash flow. Most underwriters assume a vacancy allowance of around 5–8%; tracking your actual rate tells you whether your pricing, turnaround and marketing are working.
Divide the number of vacant days by the total days the unit was available to rent, then multiply by 100. For a portfolio you can use vacant units ÷ total units instead.
Lower is better. Many landlords budget a 5–8% vacancy allowance; consistently higher may point to over-pricing or slow turnarounds.
Price to the local market, prepare units quickly between tenants, start marketing before the current tenant leaves, and keep good tenants with timely maintenance.
RentFlow logs move-in and move-out dates per unit so your real occupancy and lost rent stay visible. Free to start.
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