Guide 02 For landlords renting by owner

What a vacant month really costs you

The rent you don’t collect is only part of it. Here’s the simple math, and how to compare it to a lower asking rent.

Aerial view of Philadelphia rowhouse blocks and a tree-lined street
The short answer

A vacant month costs you the full month’s rent, plus anything you only pay because the unit is empty, like utilities in your name and extra upkeep, while your mortgage, taxes, and insurance come straight out of your pocket. A price drop costs you the difference every month of the lease. If a lower rent fills the unit enough weeks sooner to cover that difference, the drop is the cheaper choice.

When a unit sits, it’s easy to tell yourself you’ll wait for the right tenant at the right price. Sometimes that’s exactly the right call. But it helps to know what the waiting costs, in actual dollars, before you decide.

None of this needs a spreadsheet. It needs your rent, your monthly bills on the property, and a few minutes.

1. The rent you don’t get back

This is the obvious part, and it’s the biggest. Rent you didn’t collect in March doesn’t show up later. A lease that starts a month late is simply a month shorter on income.

One week empty = monthly rent × 12 ÷ 52

One month empty = monthly rent

At $1,500 a month, one week empty is about $346, and one month is $1,500. You can plug your own rent into the calculator on the home page.

2. What you keep paying while it’s empty

Your mortgage, property taxes, and insurance don’t stop. To be precise, you’d pay those either way. What a vacancy takes away is the rent that normally covers them, so for that month they come straight out of your pocket.

Then there are the costs that only show up because the unit is empty:

  • Utilities that switch back into your name, like electric, gas, or water.
  • Heat in the winter so pipes don’t freeze.
  • Lawn care or snow removal a tenant would have handled.
  • Extra trips for showings, cleaning, and small fixes.
  • Any listing or advertising fees.

Add those up for a typical month. That number, plus a month of rent, is your real cost of one more empty month.

3. Comparing a vacancy to a price drop

A lower rent feels like losing money, and it is. But it’s spread out. A price drop costs you the difference every month of the lease. A vacancy costs you a full month at once.

Cost of a price drop = the drop × months in the lease

Weeks it has to save = cost of the drop ÷ one week of rent

If a lower rent is likely to get the unit filled at least that many weeks sooner, the drop pays for itself. If it isn’t, holding may make more sense.

4. A worked example

These numbers are made up to show the math. Use your own.

Example: $1,500 a month, 12-month lease
LineAmount
One week of rent ($1,500 × 12 ÷ 52)$346
One more empty month, rent only$1,500
Vacancy-only costs for that month (example)$150
One more empty month, total$1,650
The price drop
LineAmount
Drop the rent by $75 for a 12-month lease$900
Weeks it has to save ($900 ÷ $346)About 2.6

So in this example, if dropping $75 gets the unit rented about three weeks sooner, it costs less than waiting. If you need the full $1,500 for a reason, that’s fine too. Now you’re choosing with the numbers in front of you.

Two things the math doesn’t show. A lower starting rent also sets the base for future renewals, so factor that in. And a price drop won’t fix dark photos or slow replies. If the listing has a different problem, cutting the rent just costs you money. See why your rental is sitting first.

5. When holding the price makes sense

Waiting isn’t always the wrong move. If the listing just went up, if it’s a slow time of year for your block, or if the unit is clearly in line with what has rented nearby, give it a fair run before you touch the rent. The same goes if you’ve just fixed something real, like new photos or faster replies, and want to see if that was the problem.

What I’d avoid is waiting without a date. Pick a point, maybe two more weeks, when you’ll look at the numbers again. That way the decision is made on purpose, not by default.

6. Run your own numbers in five minutes

Your numbers
  • Write down the monthly rent and figure one week of rent.
  • List what you pay only while it’s empty, for one month.
  • Add them together: that’s one more empty month.
  • Pick a realistic drop and multiply it by the lease length.
  • Divide that by one week of rent to see how many weeks it has to save.
  • Ask honestly whether the listing, not the price, is the real issue.

This isn’t about panicking into a lower rent. It’s about knowing what each week costs, so the decision is a business decision and not a guess.

Next step Free listing check

If you want me to take a look, just say so.

The listing check is free, and you can use the notes yourself. I’ll look at the asking rent, the photos, and how the place is being shown, and I’ll get back to you myself.