Avoided-Cost Ratesby Hundred Dollar Labs

Missouri PURPA avoided-cost rates

The standard-offer rates for small generators (qualifying facilities) published by 4 investor-owned utilities we cover in Missouri: Ameren Missouri, Evergy Missouri Metro, Evergy Missouri West and Liberty (Empire). Checked on October 4, 2026.

Utility	Schedule	Size cap	Rate structure	Effective	Checked on
Ameren Missouri	MO.P.S.C. Schedule No. 6, Sheet No. 170-170.4: Electric Power Purchases from Qualifying Facilities (7th Revised Sheet No. 170 carries the standard rates)	Standard rates apply to customers with a design capacity of 500 kW or less. Company is not obligated to enter new contracts with QFs larger than 20,000 kW net capacity (FERC Docket No. QM16-2-000, June 30, 2016).	Two options: (a) non-time-differentiated seasonal energy rate (Summer = June-September billing periods, Winter = October-May); (b) time-differentiated seasonal rates for Weekday 10 AM-10 PM, Weekday 10 PM-10 AM, and Saturday/Sunday/Holiday. A monthly customer charge per meter applies ($4.00/$6.00 single/three phase non-time-differentiated; $13.00/$15.00 time-differentiated).	2025-03-01	2026-10-04
Evergy Missouri Metro	Parallel Generation Contract Service, Schedule PG (P.S.C. MO. No. 7, Sheets 31, 31A, 31B); payment rate on 16th Revised Sheet No. 31A	Not applicable where the Customer's maximum capacity exceeds 100 kW; service at one point of delivery with the generator operating in parallel with the Company's system. Not available for Resale or Time-Related Pricing service.	Single flat payment rate per kWh for all kWh received; no seasonal or time-of-day differentiation. Energy delivered to the Customer is billed under the applicable Residential or General Service schedule.	2025-02-21	2026-10-04
Evergy Missouri West	Parallel Generation Contract Service (Cogeneration Purchase Schedule), P.S.C. MO. No. 1, Sheets 102, 102.1, 102.2; payment rate on 6th Revised Sheet No. 102.1	Not applicable where the Customer's maximum capacity exceeds 100 kW; service at one point of delivery with the generator operating in parallel. Not available for Resale or Time-Related Pricing service.	Single flat payment rate per kWh for all kWh received; no seasonal or time-of-day differentiation. Energy delivered to the Customer is billed under the applicable Residential or General Service schedule.	2025-02-21	2026-10-04
Liberty (Empire)	Cogeneration Purchase Rate, Schedule CP (P.S.C. Mo. No. 6, Sec. 4, 3rd Revised Sheet No. 6)	Cogenerators with a maximum rated capacity of 100 kW or less that have signed a Purchase Agreement with the Company.	Seasonal flat energy purchase rate per kWh: Summer (June-September) and Winter (October-May). The 2025 filing letter says the marginal costs are projected market prices at the Liberty-specific load node in the SPP Integrated Marketplace.	2025-02-14	2026-10-04

When these rates change next

Ameren Missouri: Biennial: 20 CSR 4240-3.155(3) requires cogeneration tariffs and data to be updated and revised on or before January 15 of every odd-numbered year unless the Commission orders otherwise; next filing due by January 15, 2027.
Evergy Missouri Metro: Biennial: 20 CSR 4240-3.155(3) requires cogeneration tariffs and data to be updated and revised on or before January 15 of every odd-numbered year unless the Commission orders otherwise; next filing due by January 15, 2027.
Evergy Missouri West: Biennial: 20 CSR 4240-3.155(3) requires cogeneration tariffs and data to be updated and revised on or before January 15 of every odd-numbered year unless the Commission orders otherwise; next filing due by January 15, 2027.
Liberty (Empire): Biennial: 20 CSR 4240-3.155(3) requires cogeneration tariffs and data to be updated and revised on or before January 15 of every odd-numbered year unless the Commission orders otherwise; next filing due by January 15, 2027.

Rates, eligibility and contract terms change: confirm them with the utility or the state utility commission before relying on them.