What disqualifies you from Ameren Missouri heat pump rebates through Pay As You Save (PAYS)?

New construction. Removing an existing gas, propane or wood heat source: the chart requires a home with non-electric heat to keep it as primary or backup heat. Projects whose estimated savings do not cover the PAYS charge, unless you pay a copay.

Where do you apply for Ameren Missouri heat pump rebates through Pay As You Save (PAYS)?

Pay As You Save: https://ameren.com/efficiency/programs/pays; FastTrack HVAC PAYS: https://ameren.com/efficiency/programs/hvac-pays; Phone: 1.800.563.2105.

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Ameren Missouri heat pump rebates through Pay As You Save (PAYS) open

Q: How much does Ameren Missouri heat pump rebates through Pay As You Save (PAYS) pay?

Published amounts run from $250 to $5,000, depending on the upgrade and the conditions attached to it. Every amount and its conditions are listed on this page, each with the date it was last verified against the administrator's own page.

Administered by Ameren Missouri, through its Pay As You Save and FastTrack HVAC PAYS contractors.

Ameren Missouri pays $2,000 toward an air-source heat pump, $5,000 for a ground-source system and $500 a ton for a mini-split in 2026, but only inside its Pay As You Save program: the rebate cuts the project cost, and the balance is repaid on your electric bill with 3% interest, tied to the meter. Gas-heated homes must keep their furnace.

source · verified 3 October 2026 · amounts in US dollars

What it pays

What Ameren takes off a PAYS project's cost (not paid to you), 1 January to 31 December 2026
Upgrade	Condition	Up to
Air-source heat pump replacing an air-source heat pump	15.2+ SEER2	$2,000
Air-source heat pump replacing electric resistance heat	15.2+ SEER2	$2,000
Air-source heat pump, no existing central system	15.2+ SEER2	$2,000
Dual-fuel air-source heat pump	15.2+ SEER2; see the scenarios below	$2,000
Ground-source heat pump replacing a ground-source heat pump	23+ EER2	$5,000
Mini-split heat pump or air conditioner	19+ SEER2	$500 a ton
Central air conditioner	15.2+ SEER2	$1,000
Smart thermostat	ENERGY STAR or on Ameren's list	$250
Air sealing	$0.06 a sq ft; at least a 20% leakage reduction	$0.06 a sq ft
Ceiling or attic insulation	$0.20 a sq ft; from R-20 or below to at least R-38	$0.20 a sq ft
Duct sealing or repair	50% of cost; at least a 20% leakage reduction	$250

Ameren's 2026 eligible-scenarios chart, selected rows (a dash is a blank cell)
Existing system	Dual-fuel heat pump	Heat pump, no gas backup	Ground-source
Central air and gas furnace	$1,000	—	$5,000 (dual fuel)
Central air and propane, wood or other unregulated fuel	$1,000	—	$5,000 (dual fuel)
Central air and electric furnace	—	$2,000	$5,000
Central or room air, no central heat	—	$2,000	$5,000
Dual-fuel heat pump with gas backup	$2,000	—	$5,000 (dual fuel)

The PAYS charge covers the installed cost after the rebate, plus 3% interest and a small close-out fee. A project qualifies when the monthly charge is no more than 80% of the estimated monthly savings; if it is more, you can make a copay to bring it in line.

Who is eligible

who: Ameren Missouri residential electric customers; every one can get the free home energy assessment.
rebates: Only in 'tier 4 of the PAYS program', meaning upgrades financed through the PAYS charge on your bill.
HVAC: The old air conditioner must be at least 10 years old, rated 14 SEER or less, or no longer working.
occupancy: You must have lived in the home for the past 12 months, for the usage analysis.
renters and mobile homes: Renters need the property owner's written consent. Mobile homes must be on a permanent foundation and no more than 35 years old.

What disqualifies you

The rules people find out about after the work is done.

New construction.
Removing an existing gas, propane or wood heat source: the chart requires a home with non-electric heat to keep it as primary or backup heat.
Projects whose estimated savings do not cover the PAYS charge, unless you pay a copay.

Where the application goes

Book the free assessment for PAYS, or for a heating and cooling replacement go straight to a FastTrack HVAC PAYS contractor, who prepares the offer.

Where the application goes
If this is you	Apply here
Pay As You Save	ameren.com
FastTrack HVAC PAYS	ameren.com
Phone	1.800.563.2105

The thing most pages get wrong

Ameren Missouri's $2,000 heat pump rebate is not a mail-in check. Ameren's 2026 chart says that to be eligible 'you must participate in tier 4 of the PAYS program' and that 'Rebates will reduce the total cost of the upgrades.' The rest is repaid on your electric bill with 3% interest, and the charge stays with the meter if you move.

Gas-heated homes keep the furnace

Ameren says it 'does not promote fuel switching'. In its scenarios chart, a home with central air and a gas furnace gets $1,000 for a dual-fuel heat pump; the $2,000 dual-fuel figure appears where a dual-fuel heat pump is being replaced.

Free instead, at lower incomes

CommunitySavers, offered with Spire, installs free upgrades for customers at or below 80% of area median income or 200% of poverty, through 31 December 2026 while funds last.