A commercial property owner in Missouri opens the electric bill and pauses. The headlines say data centers are coming. The building down the street just sold to a developer who mentions hyperscalers in every conversation. And the owner is left with the question nobody has answered: who pays for all that power, and does some of it land on this building? Missouri’s 2025 energy law, Senate Bill 4, answers that question with a structure worth knowing — and names the part the owner can act on.
The obstacle has a name
The obstacle is cost-shifting — the risk that the price of serving enormous new customers quietly spreads across everyone else’s bill. It is a real, named concern, and it is the knot in the stomach of every owner watching gigawatts of new demand get announced. Missouri’s 2025 law, Senate Bill 4, was written to take that knot out.
Senate Bill 4 was passed by the Missouri General Assembly in the 2025 legislative session and signed by Governor Kehoe. It required the Missouri Public Service Commission (PSC) to adopt rates and tariffs that reflect large-load customers’ share of their cost of service and prevent residential and small commercial customers from being charged unjust or unreasonable costs arising from service to those large loads. The PSC has approved large-load tariffs for Ameren Missouri and Evergy; a case for Liberty Utilities remains in progress.
Under the PSC’s published fact sheet, the approved tariffs cover customers with monthly peak demand of roughly 75 megawatts and above. The specific terms depend on the utility and the approved tariff. The PSC’s large-load tariff page provides current summaries and links to filings.
The PSC lists these protections in the approved tariffs:
- Minimum service contracts: Large-load customers must take service for at least 12 years. They may have an optional five-year ramp-up period, making the potential commitment as long as 17 years.
- Financial security and collateral: Customers must meet creditworthiness and liquidity requirements and provide collateral equal to two years of minimum monthly bills.
- Exit and early-termination fees: Customers seeking to terminate service or change schedules must give at least 24 months’ written notice. An exit fee applies; shorter notice also triggers an early-termination fee.
- Minimum monthly bills: Each bill includes a demand charge set at 80% of the agreed rate.
- Cost stabilization recovery: The mechanism is intended to let utilities recover the costs of serving these customers and ensure large-load customers pay their full cost of service.
- Optional renewable and carbon-free programs: Large-load customers may choose to invest in additional generation and capacity programs, including nuclear and clean-energy programs, at their own expense.
Together, these terms are designed to make large-load customers responsible for the costs of their own service rather than assigning those costs to other customer classes. They do not guarantee that ordinary commercial rates will remain unchanged. Future generation investments and their effects on rates remain matters for regulators to consider in individual proceedings, and some consumer advocacy groups have questioned whether the protections will fully prevent cost-shifting. The PSC’s future decisions and filings will show how the framework works in practice.
What this means for your building
The tariff structure is the regulator’s answer to the obstacle. The owner’s own answer sits closer to home. The building’s demand for electricity, and how exposed its operations are to whatever rates do next, are things an owner can actually see, measure and change. HVAC, lighting, controls, building-envelope improvements and solar may reduce that demand, depending on the building and the project economics.
That is where the risk lives if nothing is done: an aging rooftop unit that draws more power than it should, a lighting system that never got the controls retrofit, an envelope that leaks conditioned air through another Missouri summer. The owner who lets those ride is exposed to the rate environment on both ends — paying more for the same building, with no lever to pull when the bill moves.
The intervention: the building pays for the upgrades
Here is where the owner can act, and where the knot comes undone. Through Missouri Green Banc, C-PACE financing can fund eligible energy, water, renewable-energy and resiliency improvements through a voluntary property assessment, with up to 100% of eligible costs financed. Under § 67.2800 RSMo, the assessment term may not exceed 20 years or the weighted-average useful life of the improvements, whichever is less. The property must be in a Missouri Clean Energy District member community.
Missouri Clean Energy District is Missouri's statewide statutory PACE authority, serving communities across the state since 2011. Together with its nonprofit affiliate, Missouri Green Banc, the organizations have helped facilitate millions of dollars in clean energy financing commitments and transactions through public-private partnerships.
C-PACE financing preserves upfront liquidity, but does not eliminate cost; financing costs may exceed energy savings, and not every project will be cash-flow positive. Missouri Green Banc does not lend, quote rates or originate transactions. Property owners can review C-PACE financing and use community tools to check project and location questions. The National PACE Capital Access platform offers free project matching; a match indicates alignment with registered criteria, not endorsement. Free, role-based courses through MGB Academy help participants understand the process and prepare for NPCA registration.
An owner who takes that step is no longer the person waiting to find out what the rate environment does next. That owner is the one who already scoped the building’s demand, already knows whether the property sits in a member community, and already has a financing structure that runs with the building rather than against the balance sheet. The bill still arrives every month. But it arrives to a building that was made ready for it.
The first move is a review of the building’s energy use, planned improvements and community eligibility — Missouri Green Banc’s community tools and C-PACE overview are the place to begin, and the PSC’s current filings remain the source for the latest tariff details.
This article provides general information and is not legal, tax, engineering, investment or financial advice.
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Meta description: See how Missouri SB 4 tariffs assign large-load costs, what protections apply, and what commercial property owners can control through building upgrades and C-PACE.
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