The asymmetry
Industrial leases run 5, 7, or 10 years. The negotiation that produced your current lease took 6–9 months. The landlord's analysis of your renewal — when it starts, what they'll quote, what they'll concede — begins 18–24 months before your expiration date. Most tenants don't engage until 6 months out.
That gap is not accidental. It's the structure of the asymmetry. The landlord knows your expiration better than you do. They've already calculated the cost of keeping you versus replacing you. They've decided what concessions they're prepared to offer if pushed, and they've decided what their opening number will be if you don't push. By the time you call them, they have a strategy. You don't.
What the landlord is doing 18 months out
- Month 24 — Portfolio review The landlord's asset management team flags your lease in their quarterly expiration report. They review your payment history, your subleasing activity, your space utilization, and your industry. They classify you as retention-priority, neutral, or replaceable.
- Month 18 — Market positioning They pull comps for your suite and your submarket. They model the renewal economics — what does it cost to replace you (downtime, broker fee, TIs, free rent) versus what does it cost to keep you (your expected demanded discount)? This produces their walk-away number.
- Month 12 — Capital planning They book the building's TI budget for the next fiscal year. If they're planning to fund a TI package for your renewal, it gets allocated now. If they're not, they've already decided to take their chances on letting you walk.
- Month 6 — Opening LOI They issue you a renewal LOI. This is the first move they make publicly. By design, it's the move they've been preparing for 12+ months. You read it cold.
Why "I'll just renew in place" is the most expensive option
Landlords have a name for tenants who never test the market: "captives." The pricing for a captive is the pricing the landlord can extract knowing the tenant won't shop. It is materially worse than the pricing for a tenant who runs a credible competitive process — usually 8–15% worse on rent, and often 3–5x worse on concession packages.
The mechanism is simple. If the landlord believes you will not leave, there is no reason to discount. They will quote you market or above, no free rent, minimal TIs, and a small annual escalator. The math is just the math. They're not being aggressive — they're being correct, given the information they have.
What "the 18-month window" actually looks like
Months 18–14: Define and brief
This is internal. Get your operations team aligned on what you actually need. Square footage projection. Throughput assumptions. Power, dock counts, clear height, parking. Anything that's changed since you signed the current lease should be re-examined. You can't negotiate well until you know what "well" means.
Months 14–10: Quiet market sweep
Your broker should be touring buildings — quietly — to develop a real list of credible alternatives. Not a fishing expedition. Three to five buildings, qualified against your spec, with current asking terms documented. The landlord should not yet know you're doing this.
Months 10–6: Soft signal to the landlord
A casual mention. A request for a CAM reconciliation. A question about op-ex. Anything that signals you have a brain and that you're paying attention. The landlord's asset manager will absorb the signal and re-classify you from "captive" to "engaged." Their internal model on you changes.
Months 6–3: Parallel RFP
The landlord gets a formal request for renewal terms. The three to five qualified alternatives get formal RFPs. Both processes run in parallel. The landlord knows there are alternatives because you tell them — not threateningly, just factually. Their LOI looks materially different than the one they would have sent a captive.
Months 3–0: Compare and close
Final negotiation. Side-by-side comparison: blend-and-extend in place versus relocation to the best alternative. The decision becomes about operational fit and net occupancy cost, not about which broker you're loyal to. The landlord knows it. The pricing reflects it.
The two failure modes
Failure mode 1: Wait too long
The most common failure. Tenant assumes the renewal is straightforward and starts at month 6. By then, the landlord has already issued an LOI that anchors the negotiation, the tenant's BATNA is weak because there's no time to qualify alternatives, and the landlord knows it. Outcome: tenant signs at 90% of the landlord's opening number, claims it was a "good negotiation," and pays $1M+ over what was actually available.
Failure mode 2: Engage too aggressively too early
Less common, more damaging. Tenant tells the landlord at month 20 that they're shopping the market and considering relocation. The landlord, sophisticated, calls the bluff. They issue a hard opening LOI early, anchor the conversation, and force the tenant into a position where bluffing is no longer possible. Outcome: tenant either has to actually move (expensive, disruptive) or has to capitulate (humiliating, and the landlord remembers).
The 18-month rule isn't "start talking to the landlord at month 18." It's "have a strategy at month 18." The conversation with the landlord starts much later, but the work behind the conversation starts now.
What this looks like in practice
We had a client late last year with a 78,000 SF lease in South Stemmons expiring in February 2026. They called us in May 2024 — 21 months out. The landlord didn't hear from anyone (us or the tenant) until August 2025. By then, we had four qualified alternatives, three of which were within 3 miles of the existing building. The landlord's LOI in August was at $7.25 NNN with 3 months free. The final signed deal was $6.55 NNN with 7 months free, $18 in TIs, and a 5-year termination option. The total NPV savings versus the LOI was $1.6M. The tenant never moved.
None of that is possible at month 6. The work that produced that outcome happened in the year the landlord didn't see.