Free calculator
Vacancy cost calculator
See what every day a unit sits empty is costing you in rent you won’t get back. Enter the rent and the days vacant — the estimate is based on your own numbers.
The short answer
Last updated: July 2026
Vacancy cost is the rent you forgo for each day a unit sits empty — income you can’t recover later. Estimate it by turning monthly rent into a daily rate (rent × 12 ÷ 365) and multiplying by the days vacant. A $1,575/month unit empty 20 days loses about $1,035, before carrying costs.
After the estimate:
Self-management softwareVacancy calculator
What an empty unit is costing you.
Every day a unit sits empty is rent you never get back. Here's the arithmetic on yours.
Monthly rent for the unit
$
Days vacant
30
0 days
90 days
Input-driven result
Your inputs
Formula
Result below
$1,553
At $1,575/mo, every vacant day costs about $52. 30 days empty ≈ $1,553 in rent you won't get back.
Vacancy cost at this rent
One vacant day
$52
30 vacant days
$1,553
One month of rent
$1,575
Estimate based on your inputs. Not a promise of results.
Opportunity-cost arithmetic only. The calculator does not predict how long your vacancy will last or claim Aptoria will shorten it.
How it works
How this tool works.
A vacant rental doesn’t just feel expensive — it’s a measurable hole in your year. Every day the unit sits empty is a day of rent you can’t recover later, on top of the taxes, insurance, and mortgage that don’t pause when the tenant leaves.
This calculator turns that into a plain number: enter the monthly rent and how many days the unit has been (or might be) empty, and it estimates the rent forgone over that window. It’s an illustration built from the figures you enter — not a prediction of your actual vacancy.
Make the result useful
Use vacancy cost to set a decision threshold
Vacancy is not only a leasing metric. It gives you a dollar threshold for deciding whether a repair, a listing upgrade, or a modest concession is worth considering. Start with the rent you actually expect to collect, not an aspirational asking price.
Keep the result separate from carrying costs. Mortgage, tax, insurance, and owner-paid utilities continue while a unit is empty, so lost rent is the clean minimum—not the full economic cost.
Questions landlords ask
Questions about this tool and its limits.
Built by a landlord who's done every one of these jobs by hand.
Aptoria was built by an owner-operator managing a Brooklyn portfolio — the 11pm calls, the awkward rent texts, the April receipt-pile — not by a software team guessing at the problem.
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