Vacancy Rent Calculator
Every vacant month costs a landlord the full rent plus the expense of turning the unit over for the next tenant. Investors measure this with two numbers: the vacancy rate and the vacancy loss in dollars. This calculator estimates both, for a single rental or a multifamily building, and adds the turnover costs most simple calculators ignore so you see the true cost of vacancy.
Vacancy Rent Calculator
What Is Vacancy Rent (Vacancy Loss)?
Vacancy rent, more commonly called vacancy loss, is the rental income you lose while a unit sits empty. If a $1,500 apartment is vacant for one month, that is a $1,500 vacancy loss. Over a year, those gaps add up and directly reduce your effective gross income, which is the rent you actually collect.
There are two ways to express it. The physical vacancy rate is vacant units divided by total units (or vacant time divided by total time). The economic vacancy rate is rent actually lost divided by the gross potential rent. They are usually close, but they diverge when vacant units rent for different amounts than occupied ones.
Formulas Used
Vacancy loss = Gross rent x Vacancy rate
Effective rent = Monthly rent - Monthly vacancy loss
Annual vacancy loss = Monthly vacancy loss x 12
Effective gross income = Gross potential rent - Annual vacancy loss
True cost of vacancy = Annual vacancy loss + (Turnover cost per vacancy x Vacancies per year)
Worked Example
A landlord charges $1,500 per month and expects an 8% vacancy rate, with one turnover per year costing $800 in cleaning, minor repairs, and marketing:
Monthly vacancy loss = $1,500 x 0.08 = $120
Annual vacancy loss = $120 x 12 = $1,440
Effective monthly rent = $1,500 - $120 = $1,380
Effective gross income = $18,000 - $1,440 = $16,560
True annual cost = $1,440 + $800 = $2,240
Notice the turnover cost adds more than 50% on top of the pure rent loss. That is why landlords who only budget the rent loss consistently underestimate vacancies.
Typical Vacancy Rates
For long-term residential rentals, underwriters commonly assume 5 to 10% vacancy, roughly 18 to 36 vacant days per year. A two-week gap between tenants works out to about 3.8%. Multifamily buildings in stable markets often run 5 to 7%. If your actual vacancy keeps coming in above 10%, the problem is usually rent pricing, marketing reach, or unit condition rather than bad luck.
Should you cut the rent to fill it faster?
The classic landlord dilemma, answered with numbers. Enter a proposed rent cut and the vacant days it would save, and the tool compares: a 5% cut on $2,000 rent to save 30 vacant days saves $1,971 but costs $1,200 over the year, for a net +$771 (worth it). The same cut to save only 10 days nets −$543 (not worth it). The break-even line is printed too: a 5% cut pays for itself if it saves at least 18.3 days of vacancy. General rule: break-even days = cut% × 3.65.
What competing vacancy calculators miss
Vacancy calculators measure the cost of empty units and stop, which answers the wrong question: the real decision is whether a rent cut fills the unit fast enough to pay for itself. This page runs that tradeoff explicitly, with the saved days, the annual cost of the cut, the net verdict, and the break-even days for any cut percentage. The turnover-cost input stays too, because a vacant unit costs more than lost rent: cleaning, repairs, and marketing add up.
How to Reduce Vacancy Loss
Price to the market. A unit priced 5% too high can sit empty for weeks; the lost rent dwarfs the extra you hoped to gain.
Start marketing early. List the unit 30 to 45 days before the current lease ends.
Turn units fast. Pre-schedule cleaners and handymen so make-ready takes days, not weeks.
Keep good tenants. Renewal incentives and responsive maintenance are cheaper than any turnover.
Budget a reserve. Set aside the expected annual vacancy loss monthly so empty months do not strain cash flow.
Frequently Asked Questions
Should I lower the rent to reduce vacancy?
Sometimes. Enter the cut percentage and the days it would save: the tool shows whether the cut pays for itself. A 5% cut needs to save at least 18.3 days to break even.
What is the difference between vacancy rate and vacancy loss?
The vacancy rate is a percentage: vacant units or vacant time divided by the total. Vacancy loss is the dollar amount of rent lost. Multiply gross rent by the vacancy rate to convert one into the other.
What is a good vacancy rate for a rental property?
For long-term residential rentals, 5% or less is strong and 5 to 10% is normal for underwriting. Persistently above 10% signals a pricing, marketing, or condition problem worth fixing.
Should turnover costs count as vacancy loss?
Strictly speaking, turnover costs are operating expenses rather than vacancy loss, but every vacant unit triggers them, so a realistic vacancy budget includes both. This calculator shows them separately and then combined as the true cost of vacancy.
How do I estimate vacancy for a property I have not bought yet?
Ask local property managers for the submarket average, check census or housing survey data for your metro, and underwrite conservatively at 8 to 10% until you have your own operating history.
Does vacancy affect my property taxes or insurance?
Rental income is generally measured over the tax year, so extended vacancies reduce reportable income. Some insurers charge more or limit coverage for units vacant beyond 30 to 60 days, so check your policy.