09/08/2026
Investor Education Corner
Loss-to-Lease: The “Upside” Number That Can Be Very Real—or Completely Fictional
Loss-to-lease measures the difference between what units are currently leased for and what management believes those same units could rent for at current market rates.
A simplified calculation is:
Market rent − in-place lease rent = loss-to-lease
Example
Assume 100 apartments.
Average market rent:
$1,200
Average current lease rent:
$1,100
Difference:
$100 per unit per month
Across 100 units:
$100 × 100 × 12 = $120,000 theoretical annual loss-to-lease
An acquisition presentation may therefore say:
“There is $120,000 of embedded rent upside.”
Maybe.
But the investor needs to verify it.
Why it may not be collectible
That $1,200 “market rent” may come from:
A superior renovated competitor
Units offering large concessions
Different square footage
A better school district
A newer building
A different utility structure
And even when $1,200 is genuinely achievable, realizing it may require:
Waiting for lease expiration
Renovating units
Paying turnover costs
Absorbing vacancy during renovation
Providing concessions
Accepting resident turnover
Complying with rent or affordability restrictions
The bigger underwriting mistake
Suppose the model increases annual revenue by the full $120,000 and capitalizes that NOI at a 7% cap rate.
The model may imply:
$120,000 ÷ 7% = $1.71 million of new value
That is powerful spreadsheet math.
But if only half the assumed rent increase is actually achievable, the theoretical value creation is dramatically smaller.
Questions investors should ask
Where did “market rent” come from?
Are the comparable units truly comparable?
Are rents effective or asking rents?
What concessions are being offered?
What renovation is required?
How many leases expire each month?
How much resident turnover is assumed?
What is the turnover cost?
Are any units income-restricted?
Is the rent increase affordable to the current resident base?
Investor takeaway:
Loss-to-lease identifies potential pricing opportunity. It does not guarantee future revenue.