Mass Save: up to $8,500 for whole-home heat pump ($2,650/ton). Weatherization incentives separate. R-410A units ineligible in 2026 (R-454B qualifies).
Program source: masssave.com
Utility programs in Massachusetts
These are the named utility and ratepayer rebates on file for Massachusetts. You claim the one that serves your address, not the total. Each card carries the program’s own terms: what equipment qualifies, who is eligible, what the cap actually is, and whether it stacks.
National Grid
masssave.com
$8,500
maximum
$2,650 per ton
You claim it after installPaid per ton
Mass Save sponsor; $2,650/ton up to $8,500 whole-home.
Equipment that qualifies
Mass Save qualifying cold-climate heat pump (whole-home electrification tier).
Who qualifies, and the cap
National Grid MA electric customers. $2,650/ton up to $8,500 whole-home.
Stacking
Statewide Mass Save program; whole-home rebate not additive with the partial-home tier on the same measure. 0% HEAT Loan available separately.
Eversource Energy
masssave.com
$8,500
maximum
$2,650 per ton
You claim it after installPaid per ton
Mass Save sponsor.
Equipment that qualifies
Mass Save qualifying cold-climate heat pump (whole-home tier).
Who qualifies, and the cap
Eversource MA electric customers. $2,650/ton up to $8,500 whole-home.
Stacking
Same statewide Mass Save program; homeowner claims through one sponsor.
Unitil
masssave.com
$8,500
maximum
$2,650 per ton
You claim it after installPaid per ton
Mass Save sponsor.
Equipment that qualifies
Mass Save qualifying cold-climate heat pump (whole-home tier).
Who qualifies, and the cap
Unitil MA electric customers. $2,650/ton up to $8,500 whole-home.
Stacking
Same statewide Mass Save program.
Cape Light Compact
capelightcompact.org
$8,500
maximum
$2,650 per ton
You claim it after installPaid per ton
Mass Save sponsor (Cape and Vineyard).
Equipment that qualifies
Mass Save qualifying cold-climate heat pump (whole-home tier).
Who qualifies, and the cap
Cape Light Compact customers (Cape and Vineyard). $2,650/ton up to $8,500.
Stacking
Mass Save sponsor for Cape Cod and Martha's Vineyard.
What your system should be sized for
A heat pump in Massachusetts should carry the house on the coldest design day, not the average one. These are the winter design temperatures our engine sizes against, in AHRI heating region IV (5,600 heating degree days at the Boston reference metro). Method: ASHRAE 99.6% heating design dry-bulb. Every row is a station value with its source and the date it was checked. Cities without a station value are not listed.
City
Design temp
Climate zone
Source
Boston
8°F
5A
ASHRAE Handbook Fundamentals, 99.6% heating design dry-bulb, station value (public excerpt via fgiaonline.org). Checked 2026-06-18.
Rebate amounts are estimates and subject to change.
Eligibility varies by income, equipment efficiency, utility territory, and program funding availability.
The federal HEAR rebate was renamed High-Efficiency Electric Home Rebates on May 29, 2026, and its rules were changed (https://www.energy.gov/documents/program-notice-26-2, fetched 2026-10-14). States run it, and many have not opened. Check your state energy office for current rebates.
After-install rebates are claimed by the homeowner after installation and are not guaranteed at the point of sale.