Colocation Economics: Usable Power, Contract Start Dates and Service Revenue

A data-centre site can have allocated utility power, commissioned IT space, signed customers and services that have begun billing at different times. Those states matter to an operator or investor because capacity starts earning under the terms of a particular customer agreement.

This article connects physical readiness with customer commitments, pricing and service commencement. It separates colocation, power, interconnection and managed services using evidence available through December 2025. The capacity example is illustrative rather than a benchmark.

Power and space at the correct capacity boundary

“Data-center capacity” can refer to utility power, customer-leasable power, white-space racks, raised-floor area, cooling capability, network ports, or a facility portfolio. “Colocation revenue” can include rent, power pass-through, cross-connects, managed services, installation, or other charges. These units answer different questions and can have different owners and dates.

Write down the site, capacity unit, power boundary, customer segment, service type, currency, contract period, and recognition period before calculating anything. The ENERGY STAR PUE glossary distinguishes facility energy from energy delivered to IT equipment; it does not identify a provider’s billable inventory or revenue. Keep the physical and commercial units explicit.

Separate gross utility, IT, leasable, active, and contracted capacity

A utility allocation, a facility’s gross electrical design, installed IT power, customer-leasable capacity, active capacity, and contracted capacity are not interchangeable. Losses, redundancy, cooling, maintenance headroom, commissioning delays, and customer-specific design can reduce the amount that can be sold. Contracted capacity can also be scheduled for a later delivery date.

Create a capacity ledger with gross utility power, critical load, installed distribution, commissioned capacity, available capacity, reserved capacity and billable capacity. Give every field a measured or contractual definition. A reserved or contracted future amount must not be added to occupied operating inventory, and a provider's definition must not be silently applied to another portfolio.

The site participants and readiness stages

The building owner, data-center operator, cloud provider, network carrier, hardware owner, and end customer can occupy different positions in the transaction. A provider may lease a facility from a landlord, sell colocation to a cloud company, and pass power costs through to that customer. A network provider may earn a separate interconnection charge.

Map the site owner, operator, contracting entity, customer, cloud or enterprise workload, network participants, landlord, and financing structure. Digital Realty’s 2024 Form 10-K describes data-center, colocation, and interconnection offerings across a portfolio. Portfolio capacity does not reveal which legal entity captures each charge.

Match power and space with installed IT and customer workload

Power without suitable space, cooling, network connectivity, or customer equipment may be unusable for the target service. Conversely, a finished room can remain idle if power delivery, fiber, security controls, or customer deployment is late. High-density compute also changes cooling and electrical requirements compared with conventional enterprise racks.

Collect rack density, usable floor area, power per rack, cooling design, network paths, customer equipment, installation date and workload type. The 2024 LBNL data-center energy-usage report examines equipment and energy-use relationships, with projections explicitly identified as scenarios. It does not supply a universal conversion from utility power to sellable colocation capacity. Model technical fit and commissioning before constructing a revenue case.

Distinguish energized, commissioned, available, reserved, and billable MW

“Energized” means power is available to a facility or distribution path; it does not prove the customer can consume it. Commissioning may require testing and acceptance. Available capacity may be marketed but not reserved. Reserved capacity may be held for a named customer without a service start. Billable capacity requires the contract’s charging conditions to be met.

Track utility energization, commissioning acceptance, customer-ready date, reservation, service commencement, meter start, and billing start as separate milestones. A Core Scientific 2024 filing distinguishes gross utility power, leasable customer power, and billable customer capacity in its disclosed business description. Use the narrowest supported measure for a commercial comparison.

Connectivity and the contracted product

Colocation value often includes access to carriers, cloud on-ramps, internet exchanges, private links, and cross-connects. A site with the same electrical capacity as another site may have a different commercial proposition if connectivity, latency, route diversity, or installation lead time differs. A power-only comparison can therefore misstate competitive position.

Record carrier presence, cross-connect count, cloud connectivity, route diversity, port speed, latency requirement, installation timing, and recurring versus one-time charges. Equinix’s 2024 Form 10-K describes colocation and interconnection as related offerings with distinct customer needs. Do not convert a connectivity footprint into recurring revenue without a price, contract, and active service.

Separate occupancy from contracted and consumed capacity

An occupied rack, a customer reservation, a signed contract, and metered consumption are different states. A contract can reserve expansion rights; a customer can pay a minimum before deploying equipment; a tenant can consume less than its committed power. A site can report high occupancy while carrying vacant power inside leased rooms.

Build an occupancy schedule by site, customer, rack or suite, contracted power, committed minimum, metered power, and expansion option. Iron Mountain’s 2024 Form 10-K reports leasable capacity and separately discusses leases and data-center business revenue. Preserve the denominator and period before comparing occupancy or revenue per megawatt.

Service commencement and customer economics

An inquiry, qualified opportunity, letter of intent, exclusivity period, reservation, signed lease, construction obligation, service commencement, and invoice are successive evidence levels. A sales pipeline can contain capacity that is technically feasible but lacks a credit-approved customer, final design, or delivery date.

Create a milestone funnel from site qualification to pricing, technical design, credit approval, contract signature, construction notice, customer installation, acceptance, service commencement, and invoice. NIST’s cloud-capability guidance treats capacity responses as procurement information with a time window; it does not establish a signed colocation agreement. Count revenue only after the contract and service milestone are supported.

Account for leases, pass-through power, and pricing structure

Pricing may combine a fixed rent, power charge, pass-through utility cost, cross-connect fee, installation charge, managed-service fee, and escalation. A higher power bill can reflect customer consumption rather than higher provider margin. A lease can also include tenant improvements, free periods, expansion options, or minimum commitments.

Map each charge, pricing basis, escalation, pass-through treatment, minimum, deposit, renewal, termination right, and capital obligation. Digital Realty and Iron Mountain disclose leasing and data-center operating structures with their own accounting boundaries. Do not use total customer spend as provider revenue without tracing pass-through and principal-versus-agent treatment.

Revenue streams and operating constraints

Colocation supplies space and infrastructure; interconnection supplies a network connection; managed services may include monitoring, migration, security, or operations; a cloud provider may bundle compute and software with facility costs. These products can have different contract terms, margins, renewal patterns, and recognition timing.

Classify each transaction by service, performance obligation, billing unit, customer, recognizing entity, and start date. CoreWeave’s 2025 Form 10-Q describes a managed cloud platform operating across data centers, while Equinix describes colocation and interconnection. Do not attribute a cloud provider’s full revenue to the underlying facility operator.

Include efficiency, cooling, security, and compliance constraints

Capacity can be technically available but commercially unsuitable if the site cannot meet density, cooling, water, security, resilience, or customer compliance requirements. Efficiency affects operating cost and customer procurement, while certification and physical controls affect eligibility. These attributes can constrain which portion of a portfolio is sellable to a particular workload.

Track the measurement boundary for power usage effectiveness, cooling type, water constraints, redundancy, physical access, security certifications, audit requirements, incident commitments and customer acceptance. The 2024 LBNL report provides energy-measurement context; a facility-to-IT efficiency ratio is a technical measure rather than a revenue proxy. Treat cooling and compliance as qualification gates, then obtain the actual customer contract and billable-capacity definition.

Compare compatible sites and agreements

Public filings and government energy reports use different boundaries, dates, and denominators. One source may report a global portfolio, another a U.S. energy estimate, and another a site-level customer-power measure. EIA analysis discusses data-center electricity demand in the power system; it does not identify a provider’s occupancy or contract capture.

For each input, record release date, geography, facility population, capacity definition, energy boundary, unit, denominator, and revision status. Mark the value as observed, calculated, scenario, or unknown. If a filing gives portfolio capacity but not occupied customer capacity, preserve that gap rather than applying an invented utilization rate.

Build a site, market, customer, and contract comparison

Compare sites only after aligning utility reliability, power density, floor area, cooling, network ecosystem, security, labor, taxes, permitting, customer mix, contract term, pass-through policy, and construction stage. A high-capacity site with one concentrated customer has a different risk profile from a smaller multi-tenant interconnection hub.

Use one operating comparator, such as commissioned customer-ready MW, and one commercial comparator, such as contracted recurring charge per billable MW. Keep gross utility, leasable, contracted, occupied, and metered values in separate columns. If definitions cannot be reconciled, state the comparison as unavailable instead of ranking operators or markets.

Translate the capacity signal into a procurement or investment decision

The analysis should change a decision: reserve capacity, qualify a colocation provider, secure a network path, evaluate a lease, fund a build, or commission a site and customer diligence review. Define the trigger, evidence threshold, owner, timing, and downside if energization, customer deployment, or contract signature slips.

Assign every conclusion to observed, calculated, scenario, or unknown evidence. A useful next step may be a site walk-through, utility and commissioning review, rack-density model, customer concentration analysis, contract audit, connectivity assessment, or revenue-recognition review. Capacity is a reason to investigate the service path, not a substitute for contract and billing evidence.

The billable capacity behind an occupied site

Imagine a hypothetical site with 10 MW of commissioned, leasable IT capacity. Customers have contracted 8 MW, but services for only 6 MW have reached the stipulated billable start date. At an invented fixed charge of $100 per contracted kW per month for those commenced services, the simplified monthly charge is $600,000.

Applying that price to all 10 MW would instead produce $1 million and assume uncommenced and uncontracted space is already earning. The remaining 2 MW of signed capacity needs its own commencement schedule; the 2 MW of unsigned capacity needs a leasing assumption.

The example excludes power pass-through, interconnection, incentives and other services. Real pricing may depend on reserved capacity, usage, minimums and local agreement terms. Keep facility energy and IT energy separate as well: an efficiency ratio does not establish the site's revenue-generating inventory.

Review the commissioned, contracted and billable populations separately, then schedule earning capacity from customer agreements. Site readiness and signed commitments are useful leading evidence; the start terms and retained service economics determine the revenue case.