The lease-up pressure cooker
A new lease-up is a race against carrying costs. Every month a building sits below stabilized occupancy, the owner is bleeding debt service, taxes, and insurance against a fraction of the rent roll. The pressure to fill units fast is intense, and the most common release valve is the concession: a free month, reduced deposit, waived fees, or gift cards.
Concessions work. They move units. But they also erode revenue, sometimes permanently, and they are easy to over-deploy in a panic. The operators who run profitable lease-ups are not the ones who avoid concessions. They are the ones who use them surgically, knowing exactly when a concession buys absorption worth more than its cost and when it just gives away money the market would have paid anyway.
What a concession really costs
The headline cost of a concession is usually understated because operators think in terms of the upfront giveaway rather than the lifetime effect on rent.
Effective rent versus face rent
A unit listed at $2,000 with one month free on a twelve-month lease has a face rent of $2,000 but an effective rent of roughly $1,833. That $167 monthly gap is the real cost, and it matters because:
- Renewals often reset off the concessioned rate, so the discount can echo into future years
- Comparable data gets muddied, since your own concession pulls down the effective rents in your submarket
- The owner's pro forma was likely built on face rents, so heavy concessions quietly miss underwriting targets
Concession depth signals to the market
Deep, broadly advertised concessions can also signal weakness. Prospects and competing operators read two free months as a building struggling to lease, which can invite tougher negotiation on every remaining unit.
The decision framework
Whether to offer a concession comes down to comparing the cost of the concession against the cost of the vacancy it prevents. Hold the concession when vacancy is cheap and demand is healthy. Offer it when vacancy is expensive and absorption has stalled.
Hold the concession when
- Lead and tour velocity are healthy for the floor plan, meaning the market is absorbing at the current price
- You are early in the lease-up with runway to lease at face rent before carrying costs bite
- The specific unit has unique appeal, like a premium view or layout, that justifies its price without a sweetener
- Competitors are not running concessions, so matching them would only erode a price the market accepts
Offer the concession when
- Absorption has stalled and units of a given floor plan are sitting well past their baseline days on market
- Carrying costs on unleased units exceed the effective-rent loss from the concession, which is often the case late in a lease-up
- The competitive set is concessioning, and standing pat means losing every comparison shopper
- You need to hit an occupancy covenant or refinance milestone by a hard date
The math of holding versus offering
The cleanest way to decide is to price both paths.
Suppose a $2,000 unit is sitting. One month free reduces effective rent by about $167 a month, or roughly $2,000 over the lease. Holding firm, meanwhile, costs roughly $66 a day in lost rent plus carrying costs.
If the concession leases the unit 30 days sooner than holding would, you have spent $2,000 in effective rent to save roughly $2,500 to $3,000 in fully loaded vacancy cost. The concession wins. If the unit would have leased at face rent within a week anyway, the concession is pure giveaway. The decision hinges entirely on how long the vacancy would otherwise persist, which is why you need clean velocity data to make the call.
Structure matters as much as size
How you structure a concession can preserve revenue better than a blunt free month.
- Prorate across the term instead of a full free month, so the discount is smaller in headline terms and less likely to anchor renewals low
- Use one-time value like a reduced deposit or waived admin fee, which costs less than recurring rent reduction and does not depress effective rent
- Target specific slow floor plans rather than blanketing the whole building, preserving face rent on units that are leasing fine
- Time-box the offer to create urgency, since an open-ended concession invites prospects to wait and shop
Why response speed reduces your concession bill
Here is the lever operators underuse: the faster and more completely you respond to leads, the fewer concessions you need to offer. Many lease-ups reach for concessions to compensate for leakage in the funnel, not genuine price resistance. If a third of your inquiries never get a timely reply, your absorption looks weak, and the instinct is to discount. But the units were never overpriced. You were just losing prospects to slow follow-up.
When an AI leasing agent like Castellan responds to every call, email, and SMS the instant it arrives, qualifies the prospect, and books the tour, the funnel runs at full capacity. Real absorption improves without touching rent. That clean signal also tells you when a concession is genuinely warranted versus when you just had a response problem. Capturing every lead is the cheapest absorption tool you have, and it should be exhausted before you start discounting.
The takeaway
Concessions are a scalpel, not a default setting. Used early and broadly out of panic, they quietly erode the revenue the whole lease-up was underwritten on. Used late, targeted, and only where vacancy cost genuinely exceeds the effective-rent loss, they accelerate absorption and protect NOI.
Before you reach for a free month, ask two questions. Is the unit actually overpriced for the market, or is my funnel leaking leads I never responded to? And does the vacancy cost of holding truly exceed the lifetime cost of the concession? Answer those honestly, fix the funnel first, and you will spend far less on concessions while leasing just as fast.