Updated: March 2026
Commercial rate guide for Spire — Natural gas distribution in eastern Missouri (St. Louis metro), Alabama (Birmingham, Mobile), and Mississippi. Serves approximately 1.7 million customers.
Large volume service for commercial accounts with declining block rates. Small volume general service with flat volumetric rate. Purchased gas adjustment applied monthly. Infrastructure replacement surcharge in Missouri.
Rising
4.2% rate increase in Missouri effective January 2026; 3.5% in Alabama effective
4.2% rate increase in Missouri effective January 2026; 3.5% in Alabama effective February 2026
Property managers with Spire accounts frequently encounter these billing challenges:
Purchased gas adjustment creating significant winter bill volatility
Infrastructure replacement surcharges as recurring new charges
Different billing formats between Missouri and Alabama divisions
Estimated reads during summer low-usage months
The utility is the sole provider in this service territory.
Natural gas distribution is regulated in all Spire service territories. Gas supply costs are passed through at cost via purchased gas adjustment.
Infrastructure system replacement surcharge (ISRS) filing pending before Missouri PSC for pipeline modernization
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