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Data centers sign long-term leases because a customer’s committed revenue can help justify and finance extremely expensive buildings, electrical infrastructure, cooling systems, utility capacity and phased expansion. For the customer, the same commitment can reserve future power and compute capacity. It is not simply a room rental: the agreement allocates construction risk, electricity costs, operating expenses, service obligations and failure remedies over many years. Before signing, evaluate the delivery schedule, usable power, pricing formula, pass-through costs, service levels, exit rights and the landlord’s ability to complete and operate the facility.
Why a data-center provider wants a long commitment
Predictable revenue supports capital investment
A modern data center requires major up-front spending before it produces operating revenue. The provider may have to acquire land, build a shell, install substations and switchgear, procure generators and cooling equipment, obtain utility service, and connect multiple network carriers. A multi-year customer commitment gives the provider a forecast of contracted revenue against which it can approve that investment and, in some cases, arrange project financing.
Fermi Inc. described the logic in its 2025 annual filing: “We expect that tenant lease agreements will generally be long-term in nature and structured to support large, phased deployments over time.” That is a statement of Fermi’s planned model, not a rule for every landlord. Some providers finance construction on their own balance sheets; others use debt, tenant prepayments, construction contributions or a combination of sources.
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Large campuses are commonly delivered in blocks. A customer might commit to an initial hall and reserve additional megawatts for later phases, while the provider orders long-lead electrical and cooling equipment in stages. A long lease can make that sequence bankable while allowing the customer to plan a multi-year migration instead of finding new capacity for each expansion.
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Power and infrastructure relationships can be intertwined
Some arrangements connect the customer, land, utility capacity, shell construction and power generation. NVIDIA’s 2026 Form 10-Q, for the quarter ended July 26, 2026, describes certain third-party data-center leases with terms of approximately 15 years whose starts depend on construction completion. The filing also discusses guarantees associated with certain partners’ land, power and shell development. This illustrates how a customer relationship can extend beyond occupying finished space; it does not mean a typical customer gives comparable guarantees.
What a “data-center lease” may actually cover
The label covers several different commercial structures. Read the defined premises and services rather than relying on the label.
| Structure | What the customer commonly receives | Questions to ask |
|---|---|---|
| Colocation lease | Defined cabinets, cages or rooms, with power, cooling, security and connectivity services. | Is rent based on floor area, reserved kilowatts, metered consumption, or a combination? |
| Powered shell or wholesale lease | A larger hall or building with substantial electrical and mechanical capacity; the customer may install its own equipment. | Which systems are operational at delivery, and who pays for fit-out, maintenance and replacements? |
| Build-to-suit or dedicated facility | A facility designed or expanded for one customer’s load and operating requirements. | Who owns improvements, bears delay risk and pays if the customer’s forecast changes? |
| Capacity reservation or expansion option | A contractual right or obligation to take future space or power in later phases. | Is the future capacity firm, conditional on financing and permits, or merely an option? |
The lease may sit beside separate power-purchase, utility, network, construction or services agreements. A 15-year data-center term should not be assumed to make every related contract 15 years. For example, an infrastructure issuer’s 2026 filing describes certain project-specific power-generation agreements lasting 10 to 25 years; those are power contracts, not a market-wide data-center lease standard.
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The contract terms that determine your real commitment
1. Capacity, premises and delivery milestones
Write down the capacity you are actually buying. “Megawatts” can mean utility service, mechanical design capacity, critical IT load, or a landlord’s gross allocation. Those are not interchangeable. The agreement should identify the premises, reserved critical load, redundancy design, usable density, expansion phases and delivery dates.
- Specify whether capacity is delivered all at once or in named phases.
- Define commissioning and acceptance tests: energization, cooling performance, controls, fire and life-safety systems, network paths and physical access.
- State what happens when a milestone slips: rent abatement, a cure period, a right to defer the phase, termination, or reimbursement of documented costs.
- Make the commencement date depend on objective conditions, not only the provider’s notice.
NVIDIA’s disclosed leases start only when construction is complete. That kind of condition can protect a customer from paying full rent before a usable facility exists, but the definition of “complete” and the consequences of an extended delay still matter.
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2. Electricity pricing and volatility
Determine whether electricity is separately metered and billed at actual cost, included in fixed rent, or calculated under another formula. A fixed rent does not necessarily mean fixed occupancy cost if utility charges, fuel surcharges, taxes or other energy items pass through.
- Identify the meter, measurement interval, losses, power factor rules and billing date.
- Check whether the landlord may change the utility provider or procurement method.
- Require supporting invoices and audit rights for pass-through charges.
- Allocate unusual items such as demand charges, renewable-energy credits, transmission upgrades, taxes and regulatory surcharges.
- Ask who bears price risk if the utility tariff changes sharply.
For high-density AI or other variable workloads, clarify whether the customer pays for reserved capacity, measured consumption, peak demand, or all three. Also check whether unused reserved power can be released, reassigned or carried into a later phase.
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Operating-cost language can materially change the economics. Request a schedule of recoverable costs and exclusions rather than accepting a broad “operating expenses” definition. The illustrative lease form discussed in a Blackstone Digital Infrastructure Trust filing includes utility and property-operation costs while also listing exclusions; actual arrangements may differ.
- Separate routine maintenance from capital replacements and structural repairs.
- Define management, administration and staffing fees, including any mark-up.
- Explain property-tax and insurance allocation for a shared campus.
- Set the allocation method for common substations, chillers, roads, security and network rooms.
- Require budgets, annual reconciliations and a process to dispute charges.
4. Service levels and remedies
Service commitments should be measurable. Review guaranteed power availability, redundancy, temperature and humidity ranges, cooling capacity, connectivity diversity, physical security, fire protection, monitoring and incident reporting. The lease should state measurement methods, exclusions, notice requirements and cure periods.
Remedies may include service credits, rent credits, reimbursement, termination after repeated or prolonged failures, or limited step-in rights. They are often capped and may exclude events such as utility outages, force majeure, customer equipment failures or planned maintenance. An illustrative Blackstone lease form says: “Service Interruption Events generally entitle Tenant to Rent credits for a portion or all of, or in some cases in excess of all of, the Tenant’s daily or monthly base Rent.” The same kind of form gives a possible example of a credit cap equal to 250% of rent owed in the month of an interruption, but that is an illustration, not a standard market number.
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Ask whether a credit is the exclusive remedy. A large credit is less useful if it is difficult to trigger, cannot be combined across incidents, or does not cover relocation and emergency-power costs.
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Model the entire initial term, not just the first-year rent. Check fixed annual escalators, index-linked increases, reset dates, minimum payments and separate charges. Confirm renewal options, notice windows and whether renewal pricing is predetermined or negotiated later.
Review assignment and sublease rules carefully, especially after a merger, restructuring or change in cloud strategy. Expansion rights should specify price, priority and expiration. Contraction rights may be unavailable or may require a termination payment. One issuer filing says its leases generally do not permit termination for convenience; that is an issuer-specific disclosure, not a universal rule. Never assume you can walk away because your workload forecast changed.
6. Counterparty, financing and completion risk
Identify the actual landlord and the entity responsible for construction, operations and utilities. A brand name may conceal a newly formed project company with limited assets. Review parent guarantees, letters of credit, completion guarantees, lender step-in provisions and restrictions imposed by project financing.
If you provide a prepayment or construction contribution, specify how it is held, when it is credited, and what you recover if the project is delayed, cancelled or transferred. The agreement should address insolvency, foreclosure, change of control and continuity of critical services.
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Are data-center leases triple-net?
Not automatically. In a triple-net, or NNN, structure the tenant commonly pays base rent plus property taxes, insurance and operating or maintenance expenses. Data-center agreements can use that approach, a modified version, or an all-inclusive pricing model. The answer depends on the executed definitions and allocation schedule.
| Cost category | Possible treatment | What to verify |
|---|---|---|
| Property tax | Tenant pays its share, pays directly, or receives an all-in rent. | Assessment methodology, appeals, exemptions and treatment of landlord-owned equipment. |
| Insurance | Landlord coverage is recovered, or customer must carry specified policies. | Limits, deductibles, business interruption coverage and subrogation waivers. |
| Operations and maintenance | Pass-through, fixed fee, or landlord responsibility subject to service levels. | Excluded capital work, management mark-ups, budgets and audit rights. |
| Utilities | Actual metered cost, formula pricing, or bundled rent. | Demand charges, losses, taxes, surcharges and volatility allocation. |
Calling a proposal “triple-net” without reading these details can hide a major difference between two offers. Compare the full expected occupancy cost, including power and pass-throughs, rather than comparing headline rent.
How to compare two proposed leases
Use one financial and operational model for both proposals. The following axes expose differences that a base-rent comparison misses.
| Comparison axis | Evidence to collect | Decision question |
|---|---|---|
| Total cost and escalation | Base rent, power formula, operating expenses, taxes, insurance, escalators and one-time charges. | What is the cost under low, expected and high power-price scenarios? |
| Usable capacity and timing | Critical IT load, redundancy, density, phase dates and acceptance tests. | When can production equipment actually be installed and energized? |
| Service-level strength | Availability targets, exclusions, reporting, credit formulas, caps and termination thresholds. | Does the remedy compensate for business impact or merely acknowledge an outage? |
| Construction certainty | Permits, utility interconnection, equipment orders, completion conditions and delay rights. | What happens if the promised phase is late? |
| Flexibility and exit cost | Expansion, contraction, assignment, sublease, renewal and termination provisions. | Can the commitment adapt if demand or corporate structure changes? |
| Counterparty strength | Landlord entity, guarantees, financing, prepayments and insolvency protections. | Who is financially able and legally obligated to finish and operate the site? |
A practical review sequence before signing
- Translate the proposal into a capacity schedule. List each phase, critical load, redundancy level, delivery date and rent commencement condition.
- Build a whole-cost model. Include base rent, electricity, demand charges, operating expenses, taxes, insurance, escalators, fit-out, network charges and likely credits.
- Test failure scenarios. Model a construction delay, utility-price spike, repeated outage, stranded reserved capacity and landlord insolvency.
- Match remedies to operational harm. Negotiate measurable service levels, reporting, cure periods, credits, termination triggers and access to equipment or alternate capacity where appropriate.
- Validate technical assumptions. Have engineering teams confirm load density, cooling headroom, maintenance windows, generator runtime, carrier diversity and commissioning evidence.
- Review the legal and tax allocation. Counsel should examine real-estate, utility, tax, liability, data-security, environmental and insolvency effects in the relevant jurisdiction.
- Obtain approval for the commitment profile. Finance and procurement should approve minimum payments, escalation exposure, prepayments, guarantees and the cost of an early exit.
Common mistakes to avoid
- Confusing reserved power with usable power: a utility allocation may not equal commissioned IT load after redundancy and cooling requirements.
- Accepting “commercially reasonable efforts” for critical dates: require objective milestones and consequences for missed delivery.
- Focusing on rent while ignoring energy: power and demand charges can dominate the bill for dense workloads.
- Assuming NNN means predictable costs: broad pass-through definitions can shift taxes, insurance, repairs and management charges to the customer.
- Treating service credits as full protection: caps, exclusions and exclusive-remedy clauses can leave consequential losses with the customer.
- Overlooking assignment restrictions: a merger, outsourcing decision or workload transfer may require consent or trigger fees.
- Paying for an option that is not firm: future phases may depend on permits, financing, utility work or a separate investment decision.
What the public filings do—and do not—establish
US SEC filings provide useful examples of how individual infrastructure companies describe lease duration, construction dependencies, tenant contributions and service provisions. They do not establish a current market-average term, a universal escalator, a standard remedy or an industry-wide percentage of triple-net leases. The approximately 15-year NVIDIA examples, Fermi’s phased-deployment description and the illustrative 250% credit cap should therefore be used as reference points, not promises about a new proposal.
Tax, real-estate, energy and insolvency consequences also vary by jurisdiction and by the signed documents. For a material commitment, the executed lease and its exhibits should be reviewed by qualified legal, tax, financial and data-center engineering advisers before signature.
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