Negative cash flow until it’s occupied — how to price the risk
Make-ready delay and empty days mean costs run while rent is zero. Calculate the pre-occupancy gap, fund it, and separate it from flip holding-cost math.
A rental can look cash-flow positive on a stabilized sheet and still drain you for months. The difference is occupancy.
Until a paying tenant is in place, rent is zero while taxes, insurance, utilities, interest, and make-ready keep running.
This post prices that gap. It is directly comparable to holding cost on a flip, but it is not the same clock. A flip burn ends when you sell. A rental vacancy ends when someone pays rent — after make-ready, marketing, screening, and lease start.[1]
We stay with the example teaching house at 1847 Birch Lane. The numbers are worksheet assumptions, not a promise about your market.[2]
Two timelines that feel alike but are not
On a flip, the holding-cost clock is interest, insurance, taxes, utilities, and site costs while you rehab and sell. That story is told carefully in the flip-track post on why flips bleed on the calendar. Use that post when the plan is list-and-close.
On a rental, you still have a pre-occupancy burn. On a property you are targeting to rent, you still may have some renovation work that will affect your pre-occupancy burn so the difference is the exit: you are not waiting on a buyer. You are waiting on a lease.
Make-ready delay, city permits, a slow plumber, and empty marketing days all sit on your checking account before the first rent payment lands.
Do not borrow the flip daily number and paste it onto a hold. Write the rental gap from rental lines.
What runs while rent is zero
Assume you close Birch Lane on day one. The prior owner left the house empty. You need paint, flooring in two rooms, a water-heater swap, and cleaning before you can show and rent.
Our Teaching example assumptions: 45 days of make-ready, then 25 days to lease and move-in. That is 70 days with no rent.
Line while vacant | Assumption | Per day |
|---|---|---|
Mortgage P&I | $1,265 / 30 | $42.17 |
Property tax accrual | $3,240 / 365 | $8.88 |
Insurance | $1,560 / 365 | $4.27 |
Utilities + lawn | $220 / month | $7.23 |
Daily burn (no rent) |
| $62.55 |
Seventy days × $62.55 ≈ $4,380 of carry with no rent.
Add make-ready cash itself — for our example we will use $8,500 for the assumption — and the pre-occupancy outlay is about $12,880 before you have collected a dollar of rent.[3]
That $12,880 is not part of the occupied-year CapEx line. It is cash that left before the stabilized cash flow sheet started. If your underwrite only showed the occupied year, you understated the risk by five figures on a modest house.
How to build the gap on the offer
Three practical ways to treat the same dollars:
Cash reserve requirement. Keep at least the make-ready bid plus 60–90 days of vacant burn in a dedicated account before you close. If you cannot fund it, the offer is too large for your liquidity — even if the stabilized sheet looks fine.
Rent-loss line in year one. Take expected vacant days × daily rent and subtract from year-one income. At $1,700/month, 70 empty days are about $3,967 of rent never earned, on top of the burn you still paid.
Price reduction / credits. If the seller’s delay or condition creates the 45-day make-ready, some of that gap belongs in negotiation. If the delay is your scope choice, it belongs in your reserve, not in a story about the seller.
A simple decision rule: write the worst plausible vacant stretch you would still accept, fund it, and only then call the deal “cash-flow positive” on a stabilized basis. If funding that stretch would break your other obligations, walk or lower the bid.
Risk tolerance in plain numbers
People differ on how much vacancy they can stomach. That is fine. Make it explicit.
Tight liquidity: Model 90 empty days and full make-ready. If you cannot write that check, you are not ready for this address at this price.
Moderate: Model 60 empty days plus a 20 percent make-ready overrun.
Flexible reserves: You may accept a thinner stabilized cash flow if the vacant gap is pre-funded and the location thesis is strong — but you still write the gap. You do not hide it.
Stabilized cash flow answers “what does a normal occupied year look like?” Vacancy pricing answers “what does my checking account do until then?” Both belong on the sheet. Budget tracking helps separate make-ready spend from ongoing maintenance so the gap does not get lost inside one repair category.
If you use thresholds — for example, alert when projected days-to-rent exceed your funded reserve — deal-killer alerts can hold that line without relying on memory.
Contrast, not confusion
Flip holding cost is a race to a sale.
Rental vacancy cost is a race to a lease.
Both punish delay.
Both are quiet.
Mixing the metaphors causes bad offers: flippers sometimes underwrite a rental like a short flip burn and forget turnover will return; landlords sometimes ignore that the first vacant stretch can be longer than any later turnover.
Price the first gap on purpose. Later turnovers get their own lesson.
The next lesson leaves cash for a moment and asks what the rental year keeps after tax — because positive cash flow and taxable income are not the same number.
Do not call it cash-flow positive until you have funded the empty stretch.
Occupancy is what stops the burn. Until a tenant pays rent, those daily costs keep running.
If you want to price vacancy and make-ready risk on a live underwrite, start a 30-day trial.
Next up: What actually lands after tax on a rental year — see what the year keeps after tax.
Use as contrast: flip burn ends at sale; rental pre-occupancy burn ends at first rent.↩