What is Vacancy Rate?
Vacancy rate is the percentage of time a rental property is unoccupied and not generating income. It is calculated as: Vacancy Rate = (Vacant Days / Total Days) x 100, or for portfolios: (Vacant Units / Total Units) x 100. A vacancy rate of 5% means the property is empty roughly 18 days per year. A 10% rate means about 36 days of lost income annually.
Vacancy is one of the biggest cash flow killers in rental investing. A $1,500/month rental with 8% vacancy loses $1,440 per year in gross income. Combined with turnover costs (cleaning, repairs, marketing, lost rent during unit prep), each vacancy event can cost $2,000-$5,000 or more.
Typical vacancy rates
National residential vacancy rates hover around 5-7%, but this varies dramatically by market, property type, and condition. Class A properties in strong markets may run 3-5%. Class C properties in weaker markets may run 10-15%. Section 8 properties often have lower vacancy because demand for subsidized housing consistently exceeds supply.
Vacancy rate in deal analysis
When evaluating rental deals, always factor in vacancy. A common mistake is projecting income based on 100% occupancy, which overstates returns. Use a realistic vacancy assumption based on local market data. Multiply gross potential rent by (1 - vacancy rate) to get effective gross income. This flows into NOI, cap rate, and cash-on-cash return calculations.
Reducing vacancy
Strategies include competitive pricing (slightly below market rent fills units faster), responsive maintenance (tenants stay longer in well-maintained properties), proper tenant screening (reducing turnover from problem tenants), lease renewal incentives, and professional property management. The cost of reducing rent by $50/month to avoid a one-month vacancy almost always favors the lower rent.