Updated: March 2026
Commercial rate guide for Spire MO — Greater St. Louis metropolitan area and central Missouri. Largest natural gas distribution company in Missouri. Now operating under the Spire brand. Subsidiary of Spire Inc.
Large general service (LGS) and small general service (SGS) rate schedules. Purchased gas adjustment (PGA) for commodity cost pass-through. Infrastructure system replacement surcharge (ISRS). Weather normalization adjustment.
Rising
5.4% distribution rate increase effective March 2026 approved by MO PSC for pipe
5.4% distribution rate increase effective March 2026 approved by MO PSC for pipeline modernization and safety compliance investments
Property managers with Spire MO accounts frequently encounter these billing challenges:
Purchased gas adjustment creating commodity price volatility
ISRS surcharge increasing annually with pipeline replacements
Weather normalization adjustments affecting winter billing
Estimated meter reads during severe winter weather
Budget billing reconciliation surprises from commodity swings
The utility is the sole provider in this service territory.
Missouri is a regulated gas market. Spire Missouri (Laclede Gas) is a regulated distribution utility under MO PSC oversight. No competitive gas supply choice for commercial customers.
ISRS surcharge update petition under MO PSC review; long-term gas infrastructure investment plan filing pending
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