Utility-specific tariffs and contracts
Wisconsin does not use one statewide large-load tariff. The PSC has approved standardized We Energies tariffs, separately modified a Wisconsin Power and Light customer agreement, and directed that utility to file a future stand-alone tariff. Applicability depends on utility service territory and the approved instrument.
Current position
We Energies has effective standardized tariffs. Wisconsin Power and Light has a preliminary Commission decision modifying one customer agreement and requiring a stand-alone tariff for future large loads.
- Actions
- 2
- Published tariffs
- 0
- Legislation
- 2
- Status
- Adopted + under review
Regulatory and utility record
Tariffs, contracts, and proceedings
Each record is shown on its own terms. A utility-specific tariff or contract does not automatically apply to every large customer in the state.
We Energies · Effective; court challenge pending
We Energies very-large-customer tariffs
PSC Wisconsin approved linked Very Large Customer and Bespoke Resources tariffs for We Energies. The mandatory structure governs market-priced service, minimum transmission billing, dedicated facilities, long-lived resource subscriptions, financial security, early termination and ongoing reporting for qualifying large loads.
Why it matters
The tariff assigns incremental generation, transmission, distribution and early-exit exposure to the large-load customer. Credit relief is conditional: a customer must maintain both A-/A3 ratings and either net worth equal to twice required security or liquidity above ten times required security.
Enforceable terms
Key requirements
Eligibility threshold
100 MW aggregate forecast threshold
The tariff is mandatory for customers at the Commission's 100 MW very-large-customer threshold.
Minimum payment
Transmission billed at greater of forecast or actual demand
Minimum billing demand is 100% of initially forecasted load or actual demand in the billing period, whichever is higher. Monthly transmission under-recovery is deferred to the next rate case.
Minimum contract term
15-year VLC term; resource term follows asset life
The initial VLC term is 15 years. Bespoke Resources run at least through depreciable life; wind and solar run at least 20 years or for the resource-contract duration.
- Service structure
- VLC market-pricing service plus Bespoke Resources agreementEffectiveA qualifying load takes mandatory VLC service and executes one or more resource agreements. Load on the VLC tariff cannot also take another We Energies retail tariff except Bespoke Resources.
- Charges and assessments
- Fleet Firm charge, CPI-adjusted administration and 1.2% assessmentEffectiveFleet Firm service uses the Cp1 billed-demand charge less allocated transmission costs. Administrative charges rise annually with CPI. Covered VLC bills include a 1.2% Act 141 assessment.
- Credit and collateral
- Security unless A-/A3 plus financial test is metEffective under challengeVLC security equals dedicated-distribution net book value plus 1.3 times 24 months of specified charges; Bespoke security equals subscribed-resource net book value. Exemption requires A-/A3 and either net worth of 2 times security or liquidity above 10 times security.
- Exit protection
- Unrecoverable development cost or resource net book valueEffectiveBefore commercial operation, the customer pays its share of nonrecoverable equipment, development and labor costs. After operation, it pays unrecoverable resource net book value. We Energies must mitigate costs and invoice within 90 days.
- Grid infrastructure
- Dedicated distribution facilities and customer-specific cost of capitalEffectiveFacilities serving VLCs are dedicated or customer-owned. The approved economic cost of capital uses 10.48%-10.98% ROE, 57% equity and 43% debt, prevailing debt cost and applicable taxes.
- Generation and resource costs
- Sufficient Bespoke Resource subscription requiredEffectiveSubscriptions must avoid long-term reliance on fleet or market firm service. Capacity-only resources are excluded; qualifying company-owned, contracted or managed resources may be outside MISO LRZ 2.
- Capacity protection
- Mandatory charge after persistent 100 MW capacity shortfallEffectiveThe Insufficient Capacity Charge activates when seasonal metered peak demand exceeds subscribed Bespoke plus Fleet Firm capacity by more than the 100 MW variance for three consecutive years.
- Customer waivers
- Large Energy Customer petition and benefit-recapture rights waivedEffectiveThe customer permanently waives seeking Large Energy Customer status and waives class-level grant recapture, while remaining eligible for grants under the same individual caps as other customers.
- Reporting and true-up
- Contract, resource, capacity, transmission and financial reportingEffectiveWe Energies must file customer contracts, resource choices, capacity reports, related FERC filings, annual transmission revenues and ATC impacts, and separate VLC financials. A future rider may issue charges or credits for cost-recovery misalignment.
Official sources supporting these requirements
Alliant Energy — Wisconsin · In progress
Alliant data-center service agreement and ordered tariff
PSC Wisconsin's May 7 preliminary decision modified Wisconsin Power and Light's customer-specific Electric Service Agreement under its existing Individual Contract Rate tariff. The Commission also ordered a stand-alone large-load tariff for future data-center customers in the utility's service territory.
Why it matters
Wisconsin Power and Light currently has two distinct tracks: a modified agreement for one customer and a required future tariff for later large loads. The PSC summary identifies stronger termination, financial, reporting and program-contribution protections, but the final order controls and the current source does not publish every contract amount or duration.
Issues under review
Key requirements
- Service structure
- Customer-specific agreement under Individual Contract Rate tariffPendingWisconsin Power and Light filed an Electric Service Agreement for one customer under its existing Individual Contract Rate tariff. This is not the uniform We Energies tariff model.
- Charges and assessments
- State energy-efficiency and renewable-program contributionPendingThe Commission required the customer to contribute to Wisconsin's statewide energy-efficiency and renewable-energy program. The summary does not publish an amount.
- Credit and collateral
- Commission-imposed financial safeguardsPendingThe official decision summary confirms financial safeguards but does not state a rating threshold, collateral formula, or dollar amount. Those details are not inferred from the separate We Energies tariff.
- Exit protection
- Strengthened termination chargePendingThe Commission strengthened the proposed charge to protect existing customers if the data-center customer leaves. The summary does not state the formula or amount.
- Generation and resource costs
- Renewable Energy Procurement Agreements approvedPendingThe Commission approved associated agreements for the customer to use renewable resources. The summary does not publish the resource quantities, prices, or duration.
- Reporting and true-up
- Additional reporting and future-adjustment mechanismPendingThe Commission added reporting to show how the contract operates in practice and created a mechanism for later adjustments if needed.
Official sources supporting these requirements
Statutory record
Legislation
AB 840
2025-2026
Data-center cost allocation, energy, and water requirements
Would require the Public Service Commission to prevent electric-infrastructure costs primarily serving a data center from being allocated to other customers and would add on-site renewable-energy and closed-loop cooling requirements.
Available for scheduling in the Senate.
SB 729
2025-2026
Very-large-customer rate class and data-center requirements
Would establish a very-large-customer class, require recurring utility cost review, and pair tariff requirements with energy, water, labor, and reporting provisions for large data centers.
Pending in the Senate Committee on Utilities, Technology and Tourism.
“Not specified” means the current official tariff record does not establish a normalized term. Retail tariff requirements are not inferred from wholesale-grid rules, interconnection processes, or pending policy proceedings.