Quick Answer: Loss to lease measures the gap when in-place rents are below market rent — representing unrealized revenue. Gain to lease is the opposite: in-place rents are above market rent, typically from lease signing in a peak market that has since softened. Together, they quantify how much rent upside or downside exists in a portfolio.
For a deep dive into loss to lease (including the formula, benchmarks, and recovery strategies), see our full loss to lease guide.
What Is Loss to Lease?
Loss to lease (LTL) is the difference between market rent and in-place rent when market rent is higher. It represents revenue the property is forgoing because existing leases were signed at rates below current market levels.
As a percentage: (Market Rent − In-Place Rent) ÷ Market Rent × 100
Example: Market rent is $1,800/month and the current lease is at $1,650/month. Loss to lease = $150/month or 8.3% of market rent.
What Is Gain to Lease?
Gain to lease (GTL) occurs when in-place rents exceed current market rent. This happens when a lease was signed during a strong market period and rents have since declined, or when concessions in the current market have effectively lowered achievable rates.
Gain to lease is a positive number when in-place rent exceeds market
Example: In-place rent is $1,900/month but current market rent has dropped to $1,800/month. Gain to lease = $100/month. This may signal renewal risk — the resident is paying above market.
Key Differences: Loss to Lease vs Gain to Lease
| Factor | Loss to Lease | Gain to Lease |
|---|---|---|
| Direction | In-place rent < market rent | In-place rent > market rent |
| Signals | Revenue upside opportunity | Renewal/turnover risk |
| Action | Push rents on renewals and new leases | Prepare for rent reductions or turnover |
| Typical cause | Rising market, long-term leases | Declining market, past concessions ending |
| Investor perception | Positive — organic growth ahead | Cautionary — revenue may decline |
| Common range | 2–10% of market rent | 1–5% (less common) |
When to Use Each Metric
Use loss to lease when: Underwriting acquisitions to quantify rent growth potential, setting renewal pricing strategy, building revenue projections, or identifying properties with the most organic upside in your portfolio.
Use gain to lease when: Assessing renewal risk on specific units, forecasting potential revenue decline in a softening market, or evaluating whether high-rent units need retention concessions to avoid costly turnover.
How They Relate in Practice
A single property can have both loss to lease and gain to lease simultaneously across different units. A 200-unit property might show 6% average loss to lease across 160 units while 40 units carry 2% gain to lease from leases signed at last year's peak. The net position tells you the true rent gap story.
Operators who track both metrics at the unit level can make surgical pricing decisions: push rents aggressively on units with high LTL, while offering strategic renewal incentives on GTL units to avoid turnover costs that exceed the rent premium. Use our net effective rent calculator to see how concessions affect your true rent picture, and explore BubbleGum BI's market intelligence tools for real-time loss-to-lease tracking across your portfolio.
Monitor Loss to Lease and Gain to Lease in Real Time
BubbleGum BI calculates loss to lease and gain to lease at the unit, property, and portfolio level, automatically updated from your property management system.
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