A take-or-pay provision can require payment for a minimum reserved capacity even when actual usage is lower. A ramp schedule sets when capacity and billing commitments increase. Utility letters and service documents address a different question: the conditions and timing for supplying the site. Read these provisions together, because the actual agreements determine which commitments apply and when.
Why do these three terms matter more in 2026?
Because the market has no slack. Primary market vacancy reached a record low of 1.4 percent in the first half of 2026, and 80.4 percent of the 7,481.1 MW under construction was already committed before it opened (CBRE North America Data Center Trends H1 2026). JLL puts North American vacancy at about 1 percent for a third straight year and expects it to stay near zero through 2028 (JLL North America Data Center Report, Midyear 2026). When an operator can fill a hall several times over, the contract terms move in the operator’s favour. CBRE’s H1 2026 report notes that minimum utilization levels of 60 to 85 percent of allocated power are increasingly common in US leases.
Rates have followed the same direction. JLL reports rents up nearly 70 percent since 2020, averaging 9 percent a year, with that momentum expected to hold through 2030. Our colocation pricing by market guide sets out the published bands, and this article covers the terms that sit underneath them and decide what a band actually costs over a term.
What does take-or-pay actually commit you to?
Consider an illustrative lease with a 1 MW commitment and a 75 percent minimum billing floor after the ramp. If usage is 400 kW but billing is based on 750 kW, the unused 350 kW at an illustrative $150 per kW per month costs $630,000 a year, or $3.15 million over five years before escalators. That is a cost of reserved but unused capacity, not necessarily payment for electricity consumed. Check whether the actual floor applies to capacity charges, energy charges or another measure.
Operators are not being unreasonable when they ask for this. They have built or reserved the power plant, the switchgear and the cooling for the full commitment, and they have usually turned away another tenant to hold it. The floor is how they protect that decision. The buyer’s job is to make sure the commitment matches what will actually be installed and when, which is where the ramp schedule comes in.
How should a ramp schedule be built?
A ramp lets billing start below the full commitment and step up on a timetable. Published examples describe billing beginning at 25 percent of capacity in month one and reaching 100 percent by month seven (AltStreet colocation lease reference, September 2026). On larger wholesale and hyperscale deals, ramp tranches typically add capacity in 6 to 12 month steps with hard dates and contractual step-ups, and some use a discounted “shadow rent” during the ramp that moves to the full rate on a fixed date or at commissioning, whichever comes first (Build, June 2026).
Three things decide whether a ramp protects the buyer or just delays the bill.
- Whether the steps are tied to dates or to events. A step that fires when the tenant’s hardware is energized protects against supply chain slips. A step that fires on a calendar date offers no such protection when the delivery slips.
- Whether the operator’s delivery obligation is tied to the same dates. Late energization is described as the most common failure in the current build cycle (AltStreet, September 2026). If the tenant’s billing steps up on schedule while the operator’s power arrives late, the ramp has only protected one side.
- Whether unused ramp capacity can be deferred. If hardware delivery may slip, negotiate the conditions, notice periods and costs for moving a tranche; do not assume a deferral right exists.
Obtain a delivery schedule for the actual hall and configuration. CBRE’s H1 2026 report notes fit-out dates extending into months and liquid-cooling conversions that can exceed six months. The GPU colocation lead times guide can help structure the questions, but a general market range is not a committed ready-for-service date.
What is a will-serve letter, and what is it not?
A will-serve letter is one part of utility diligence; read its actual scope and conditions. For example, SRP says its letters do not guarantee service. Do not assume every utility uses the same terms. Establish in the applicable documents what capacity, delivery dates, studies, upgrades, deposits and outstanding conditions apply to this site.
Power delivery depends on the project, not just the name of a document. Dominion Energy’s data-center guidance describes site-specific power plans and milestones including design, rights of way, permits, equipment and construction. Ask the utility and operator to identify what is complete, what remains conditional and what date is actually committed for the load you need.
How do the terms compare across deal sizes?
| Term | Retail (under about 500 kW) | Wholesale (1 MW and up) | Source and period |
|---|---|---|---|
| Typical term length | 1 to 3 years | 5 to 15 years | AltStreet, September 2026 |
| Minimum utilization floor | Often the full commitment | 60 to 85 percent of allocated power, increasingly common | CBRE North America Data Center Trends H1 2026 |
| Ramp | Short or none | Tranches of 6 to 12 months with hard dates; shadow rent during ramp on some deals | Build, June 2026 |
| Escalator | Reset to market at renewal, or 2 to 3 percent a year | 3 to 4 percent fixed or CPI indexed on 10 to 15 year terms | AltStreet, September 2026; Build, June 2026 |
| Early termination | Fees equal to most or all remaining charges | Effectively non-cancellable for the term | AltStreet, September 2026 |
| Power cost pass-through | Fixed, metered at cost plus PUE, or fixed per kWh | Metered pass-through; PUE caps of 1.3 to 1.4 on hyperscale deals | AltStreet, September 2026; Build, June 2026 |
These examples describe terms reported by the cited sources; they are not a representative survey of every contract or a quote. Confirm the relevant provisions in the actual proposal, including billing, escalation, termination and power-cost calculations.
What should a buyer put in the RFP?
- The committed kW, expected deployment in each quarter and capacity you need to reserve. Ask operators to price alternative ramps and floors; a credible plan does not guarantee a lower minimum.
- A ramp with event based steps, deferral rights for slipped tranches, and the operator’s delivery dates written on the same page with remedies if they are missed.
- The utility documents, not just the will-serve letter: the electric service agreement, the interconnection milestone and the utility’s written date.
- How the minimum floor is measured. Monthly peak, monthly average and contracted capacity produce very different bills at the same usage.
- Term and expansion as currency. Operators trade rate and floor for duration and for a committed expansion schedule, which is often worth more to them than a larger day-one footprint.
Our colocation RFQ guide has the full template, and the 250 kW to 3 MW buyer’s guide covers how these terms bite hardest in the mid-size band, where the tenant is too small to be an anchor and too large to slot into existing space.
FAQ: take-or-pay, ramps and will-serve letters
Q: What is a typical take-or-pay floor in a colocation lease?
CBRE reports minimum utilization levels of 60 to 85 percent of allocated power as increasingly common in US leases in the first half of 2026, while retail agreements often bill the full commitment with no separate floor.
Q: How long does a ramp schedule usually run?
Published examples run from 25 percent in month one to 100 percent by month seven for a mid-size deployment, and tranches of 6 to 12 months each on large wholesale deals. The right length is the one that matches your hardware delivery dates, not a market average.
Q: Is a will-serve letter enough to rely on for a 2027 delivery?
Do not rely on the label alone. Review what the letter actually commits to and what remains conditional, then obtain the supporting utility milestones and applicable service documents. A forecast or target date should not be presented as a guaranteed delivery date.
Q: Can a take-or-pay floor be negotiated down?
Usually in exchange for something the operator values: a longer term, a committed expansion, a larger deposit or a stronger credit position. In a market at 1 percent vacancy the floor rarely comes down for free.
Q: What happens if the operator delivers power late?
Review the agreement’s delivery conditions, billing commencement, delay remedies, termination rights and applicable law with counsel. Ask for explicit treatment of a missed energization date before signing. This article cannot establish whether charges are payable or what remedies apply under a particular agreement.
Get the terms checked before you sign
Include your requirement, proposed ramp and relevant commercial terms when you request a quote. These details help frame marketplace follow-up. Confirm current terms directly with operators and have your advisers review the agreements before signing.
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