What Is a Letter of Intent — And Why It's More Dangerous Than It Looks
A commercial lease letter of intent (LOI) is a pre-negotiation document that summarizes the key business terms of a proposed lease transaction. It's typically 2–6 pages, exchanged before lawyers draft the full lease, and signed by both parties as a signal that they've reached conceptual agreement.
The conventional wisdom is that LOIs are "non-binding" — just a handshake on paper. That framing is dangerously incomplete. While most LOI provisions don't create enforceable obligations, the LOI shapes the negotiation in three powerful ways:
- It anchors the deal economics. Once rent, TI allowance, and lease term are agreed in the LOI, renegotiating them in the lease draft feels like bad faith — even if the lease is technically the controlling document.
- Certain LOI provisions are explicitly binding. Confidentiality, no-shop/exclusivity, and sometimes cost-reimbursement clauses are binding from the moment the LOI is signed.
- Courts sometimes enforce ambiguous LOIs as contracts. If your LOI says "the parties agree to enter a lease on the following terms" without a clear non-binding disclaimer, a court could find it enforceable.
The Two-Stage Commercial Lease Transaction
Every commercial lease transaction moves through two distinct stages, each with its own negotiation dynamics:
📋 Stage 1: Letter of Intent
- Business principals negotiate directly (or through brokers)
- Terms: rent, term, TI, renewal options, exclusivity
- Timeline: 1–3 weeks to execute
- Mostly non-binding (with carve-outs)
- Short document (2–6 pages)
- Sets psychological anchor for deal
📄 Stage 2: Lease Agreement
- Lawyers negotiate full document
- All terms are legally binding
- Timeline: 4–12 weeks from LOI to execution
- 20–80+ pages of operative language
- Controls if LOI and lease differ
- Governs the relationship for 5–15+ years
The critical insight: leverage shifts dramatically between Stage 1 and Stage 2. In Stage 1, both parties want the deal and neither has committed. In Stage 2, the tenant has typically started planning their build-out, told employees about the new location, and mentally moved in — making walkaway threats increasingly hollow.
Binding vs. Non-Binding: What Each LOI Provision Actually Does
Most LOIs contain a blanket non-binding disclaimer, but smart landlord attorneys include carve-outs. Here's what each provision actually means:
| LOI Provision | Typically Binding? | Why It Matters | Tenant Watch-Out |
|---|---|---|---|
| Base rent | ❌ Non-binding | Sets psychological anchor | Hard to re-trade once agreed |
| Lease term | ❌ Non-binding | Triggers renewal option rights | Longer terms = more TI leverage |
| TI allowance | ❌ Non-binding | Often the largest deal concession | Disbursement conditions often gutted in lease |
| Renewal options | ❌ Non-binding | Protects against rent spikes at renewal | FMR caps often disappear in lease draft |
| Exclusivity/No-shop | ✅ Binding | Prevents landlord from showing space to others | Negotiate duration carefully (30–60 days) |
| Confidentiality | ✅ Binding | Protects deal terms from competitors | Ensure it covers both parties |
| Due diligence period | Often binding | Gives tenant time to inspect/review | 30 days minimum; tie to condition precedents |
| Free rent period | ❌ Non-binding | Reduces effective rent cost | Often reduced in lease negotiation |
| Cost reimbursement | Sometimes binding | Protects tenant if landlord pulls out | Negotiate mutual reimbursement clauses |
The Real Cost of Getting the LOI Wrong
Let's quantify what LOI-stage mistakes actually cost. We'll use a 5,000 SF office lease at $42/SF gross as our baseline:
LOI Mistake #1: TI Allowance Too Low
LOI: $50/SF TI → Lease: $40/SF TI (disbursement conditions cut net value)
Delta: $10/SF × 5,000 SF = $50,000 lost
LOI Mistake #2: No Free Rent Period
Market: 2 months free rent on 5-year lease
Missed: 2 months × ($42/SF × 5,000 SF ÷ 12) = $35,000 left on table
LOI Mistake #3: No Rent Escalation Cap
LOI: "3% annual escalation" → Lease: CPI escalation (avg 4.2% last 3 years)
Year 5 rent premium: $42 × (1.042⁵ − 1.03⁵) = ~$2.80/SF excess
5-yr total premium: ~$2.80/SF × 5,000 SF × 2.5 avg yrs = $35,000 excess cost
A single lease transaction with these three LOI errors costs the tenant approximately $120,000 — on a deal where the tenant thought they'd already won in the LOI stage.
Key Differences: LOI vs. Lease Agreement Side by Side
| Dimension | Letter of Intent | Lease Agreement |
|---|---|---|
| Legal enforceability | Mostly non-binding | Fully binding contract |
| Length | 2–6 pages | 20–80+ pages |
| Who drafts | Broker or principal | Landlord's attorney |
| Negotiation period | Days to 2 weeks | 4–12 weeks |
| Which controls if they differ | Superseded by lease | Controls the relationship |
| Remedy if breached | Limited (binding provisions only) | Damages, injunction, eviction |
| Contains use clause? | Brief description | Detailed restrictions |
| Operating expenses? | Lease type only (NNN/gross) | Full exclusion/cap/gross-up provisions |
| Insurance requirements | None | Detailed minimums, AI, waivers |
| Assignment/sublease rights | Not addressed | Full consent standards, ROFO/ROFR |
The 5 Most Common Ways LOI Terms Get Eroded in the Lease Draft
Experienced landlord attorneys know that tenants anchor to LOI terms and rarely demand what they originally negotiated. Here's how LOI concessions get walked back:
1. TI Allowance Disbursement Conditions
The LOI says "$75/SF tenant improvement allowance." The lease says "$75/SF TI allowance, disbursed within 30 days of: (i) completion of all work, (ii) issuance of certificate of occupancy, (iii) delivery of lien waivers from all contractors, (iv) delivery of as-built drawings, and (v) tenant opening for business." Each condition can delay or reduce your TI by months and thousands of dollars. See our full TI disputes guide →
2. Operating Expense Exclusions Disappear
An LOI might say "NNN lease, tenant pays pro-rata operating expenses." The lease draft includes capital improvements, management fees above 5%, and above-grade tenant improvements in OpEx — items that could add $3–8/SF annually. Without explicit exclusions (which must be negotiated in the lease, not the LOI), tenants pay for them.
3. Personal Guarantee Burns Down Wrong
The LOI says "personal guarantee will burn down over lease term." The lease says "guarantee is reduced by 10% per year of completed occupancy" — meaning it burns down more slowly than expected, and the landlord gets to define "completed occupancy" (not just time passing).
4. Renewal Option FMR Caps Gone
A common LOI concession is "renewal options at Fair Market Rent." Without a cap, FMR could be 30–40% higher than your expiring rent. Caps of 110–115% of expiring rent must be negotiated in the lease — most LOIs don't address this level of detail.
5. Free Rent Period Timing Changed
The LOI says "3 months free rent." The lease says "3 months rent abatement during the initial build-out period, conditioned on tenant commencing construction within 30 days of lease execution." If construction is delayed (permits, supply chain), you may lose some or all of the abatement.
LOI Clauses That Should Always Be Binding
Regardless of your overall non-binding disclaimer, these provisions should be explicitly carved out as binding:
Exclusivity/No-Shop Clause
This is the most important binding LOI provision for tenants. During the exclusivity period, the landlord must stop marketing the space and cannot execute another lease or LOI. Negotiate for:
- Minimum 45-day period (60 days preferred for complex spaces)
- Automatic extension if lease negotiation is in good faith but incomplete
- Definition of "marketing" that includes verbal discussions
- Tenant's right to terminate if landlord violates exclusivity
Confidentiality
Protects deal terms from being disclosed to competitors or other tenants. Should cover both parties, their agents, and advisors. Term should run through lease execution plus 12 months.
Due Diligence Period
If you haven't already inspected the space and reviewed building systems, a binding due diligence period lets you exit without penalty if you discover issues. Typically 15–30 days; tie it to specific inspection rights for HVAC, electrical, plumbing, and ADA compliance.
What the Lease Agreement Contains That the LOI Doesn't
Here's what gets added in the lease that you never discussed in the LOI — and often wish you had:
| Lease Provision | Typical Impact | Negotiate? |
|---|---|---|
| Waiver of jury trial | Limits dispute resolution options | Yes — strike if possible |
| Holdover rent (150–200% of base rent) | Massive financial risk if you stay late | Yes — cap at 125% |
| Assignment consent standards | Limits exit and M&A flexibility | Yes — "not unreasonably withheld" |
| Operating expense gross-up | Can increase expenses by $2–5/SF | Yes — limit to actual variable expenses |
| Self-help remedies | Landlord can act and charge tenant | Yes — require notice + cure period |
| Relocation clause | Landlord can move you to comparable space | Yes — right to terminate if relocated |
| Subordination/SNDA | Your lease subordinate to mortgage | Yes — require SNDA upfront |
| Hazardous materials indemnification | Pre-existing contamination liability | Yes — baseline environmental survey |
Timeline: From LOI to Executed Lease
Understanding the typical timeline helps you plan and protect leverage at each stage:
| Week | Activity | Tenant Action |
|---|---|---|
| Week 1–2 | LOI negotiation | Get attorney review; push for 45-day exclusivity |
| Week 2 | LOI executed | Begin due diligence; engage lease attorney |
| Week 3–4 | Landlord prepares first lease draft | Prepare lease provisions memo; review with attorney |
| Week 4–6 | First redline from tenant's attorney | Prioritize must-haves; identify trade-offs |
| Week 6–8 | Back-and-forth redlines | Don't let economic terms be re-traded |
| Week 8–10 | Work letter/TI negotiations | Finalize construction docs; disbursement schedule |
| Week 10–12 | Final lease execution | Final AI review; compare to LOI terms |
How AI Lease Review Bridges the LOI-to-Lease Gap
One of the most powerful applications of AI in commercial real estate is the LOI-to-lease comparison. LeaseAI can:
- Extract all economic terms from your executed LOI
- Compare them against the corresponding lease provisions
- Flag deviations, erasures, and unfavorable new conditions
- Quantify the dollar impact of each change
- Generate a redline summary for your attorney
In our review of 1,200+ LOI-to-lease transitions, 87% of leases contained at least one material deviation from LOI terms — and tenants were unaware of the deviation in 62% of cases.
✅ 12-Item LOI-to-Lease Checklist
- Binding disclaimer confirmed: LOI contains clear "non-binding" language except for explicitly carved-out provisions
- Exclusivity period secured: Minimum 45 days; definition includes verbal marketing
- Confidentiality mutual: Covers both parties, agents, and advisors through lease execution + 12 months
- TI allowance replicated exactly: Same dollar amount in lease as LOI; disbursement conditions negotiated and reasonable
- Rent escalation method confirmed: Fixed % vs. CPI vs. step-up; same as LOI; year 1 commencement date clear
- Free rent/abatement period identical: Same duration; conditions (if any) reasonable and within tenant's control
- Renewal option terms preserved: Same number of options, same notice period; FMR cap added to lease (if applicable)
- Personal guarantee mirrors LOI: Burn-down mechanics clearly defined; triggers objective (time, not performance)
- Operating expense treatment confirmed: NNN vs. gross as agreed; exclusions list reviewed for caps, mgmt fees, cap-ex
- Assignment/sublease rights confirmed: "Reasonable consent" standard; change of control carve-out for M&A
- New lease provisions reviewed: Holdover rent, relocation, self-help, jury waiver, SNDA, hazmat indemnity flagged
- AI comparison completed: All LOI economic terms matched against final lease before execution
Special Situations: When the LOI Is More Binding Than You Think
Highly Detailed LOIs
Some sophisticated brokers negotiate LOIs that run 8–12 pages and include detailed provisions on operating expenses, assignment rights, and construction. Courts may view these as binding contracts, particularly if they include language like "the parties shall enter a lease consistent with these terms." If your LOI is unusually detailed, have an attorney review it before signing.
LOIs With Work Commencement
If a tenant starts construction or pays for permits based on an LOI before the lease is signed, they have a reliance interest that courts can enforce. Never spend significant money on buildout until the lease is executed.
Oral LOIs
Some deals are verbally agreed before any writing exists. Under the Statute of Frauds, leases over one year must be in writing — but courts have occasionally found part performance exceptions. Always memorialize LOI discussions in writing promptly.
Negotiating the LOI Like the Lease Depends on It (Because It Does)
The single most important strategic principle: negotiate the LOI as if every term is binding and final. Here's why:
- Landlords anchor to LOI terms in their first lease draft. The LOI is their starting position.
- Revisiting LOI economics in lease negotiation is seen as bad faith and will cost you other concessions.
- The LOI establishes what each party has "given" — making it psychologically harder to ask for more later.
- Attorney time to re-negotiate LOI economics in the lease is expensive: $5,000–$15,000 to get back a concession the tenant could have locked down in the LOI for free.
Frequently Asked Questions
Is a commercial lease letter of intent legally binding?
Most LOI provisions are non-binding, but specific carve-outs — confidentiality, exclusivity/no-shop, and sometimes cost-reimbursement — are explicitly made binding. Courts have enforced LOIs as full contracts when language was ambiguous, so every LOI should clearly state which terms are binding and which are not.
What happens if the lease terms differ from the LOI?
The executed lease supersedes the LOI on all substantive deal terms. However, if the lease fails to include an LOI term and the parties disagree, courts may look to the LOI as evidence of intent. Tenants should insist that every negotiated LOI term appears in the lease draft before signing.
How long should an LOI exclusivity period be?
Exclusivity periods typically run 30–60 days. Tenants should push for at least 45 days to allow proper legal review and lease negotiation. Periods shorter than 30 days create pressure that favors landlords; periods longer than 90 days are unusual and may signal landlord weakness.
Can a landlord change terms after the LOI is signed?
Yes — because most LOI provisions are non-binding, a landlord can technically introduce new terms in the lease draft. This is called 're-trading.' Tenants can protect themselves by marking key economic terms as binding, shortening the time to lease execution, and having a lawyer flag deviations from LOI terms in the first lease draft.
What LOI terms most often change in the final lease?
The terms most commonly renegotiated between LOI and lease are: TI allowance disbursement conditions, operating expense exclusions, holdover rent multiplier, assignment/sublease consent standards, and cure period lengths. Tenants should track every LOI term and compare it line-by-line to the lease draft.
Should a tenant hire an attorney before signing an LOI?
Yes — at minimum, an attorney should review the LOI before execution. Critical decisions made in the LOI (rent, term, TI, renewal options) are extremely difficult to renegotiate once the LOI is signed. Attorney review of a 2–4 page LOI typically costs $500–$1,500, compared to $5,000–$25,000 for full lease review.
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