How to Fill Out and Submit the Mass Save Rebate Form

To fill out and submit the Mass Save rebate form, gather your utility bill, your contractor’s itemized invoice with equipment model numbers, the AHRI certified reference number for heating and cooling equipment, and your Heat Pump Installer Network (HPIN) contractor’s details, then either upload everything through the Mass Save Online Rebate Portal or mail the signed PDF form to the processing center in Arlington. Online submissions typically process in six to eight weeks, and rebate paperwork for equipment installed in 2026 must be received by February 28, 2027.1Mass Save. Air Source Heat Pumps

Confirm You’re Eligible Before You Start

The rebate program is funded by the Energy Efficiency surcharge on your utility bill, so your account has to be with one of the participating utilities: Berkshire Gas, Cape Light Compact, Eversource, Liberty, National Grid, or Unitil.2Mass Save. About Us The account also needs to be active and in good standing. Pull your most recent bill and confirm the Energy Efficiency line item is there.

The residential rebate form covers single-family homes, condos, and buildings with up to four units. Buildings with five or more units are handled through a separate multi-family process, not the residential form. Tenants can apply if the utility account is in their name or they have written authorization from the owner.3Mass Save. Multi-Family (5+ unit) Properties

Documents to Gather Before You Open the Form

Missing paperwork is the single most common reason a rebate application stalls past the standard processing window. Have all of this in front of you before you start typing:

  • Your most recent utility bill showing the full account number and service address.
  • The contractor’s invoice, which must show the contractor’s name and address, the outdoor and indoor equipment model numbers, any integrated control model numbers, the installation date, the installation address, the total install cost per system, and proof of payment.4National Grid. Residential Air Source Heat Pump Rebate Form
  • The AHRI Certified Reference Number for heating and cooling equipment, which links your specific indoor and outdoor units to a verified efficiency rating.
  • Your HPIN installer’s information: company name, HPIN Company ID, contact person, phone, email, and mailing address. Heat pump rebates require the installer to be an active member of the Mass Save Heat Pump Installer Network.5Mass Save. Heat Pump Installer Search

Check the invoice against the equipment on your wall or in your basement. If the model numbers on the paper don’t match what was actually installed, the application will be delayed or denied. If you’re uploading, scan at a resolution where every character is legible. Blurry uploads get kicked back for manual review.

Filling Out the Form

Whether you use the online portal or the PDF, the fields ask for the same information in roughly the same order: your utility account and service address, the equipment installed with model numbers, the AHRI reference number, the installer’s HPIN details, the installation date, and the total cost per system. Enter costs per system rather than a lumped project total when the form breaks them out that way.

The customer certification at the bottom needs your signature and date. The form only requires the customer’s signature; it does not require the installer to sign.4National Grid. Residential Air Source Heat Pump Rebate Form

For a whole-home heat pump rebate, you’ll also sign a Whole-home Heat Pump Verification Form confirming the home is sufficiently weatherized. If you’re claiming a partial-home rebate and want the $500 weatherization bonus, you need a Mass Save home energy assessment on file and the recommended weatherization installed within one year before or up to six months after the heat pump goes in.1Mass Save. Air Source Heat Pumps

Submitting Online

The fastest route is the Mass Save Online Rebate Portal at MassSave.com/Savings. Pick the rebate category that matches your upgrade, fill in the fields, upload your supporting documents, and confirm your entries at the review prompts before you submit. Online applications typically process in six to eight weeks.6Mass Save. Frequently Asked Questions – Section: Rebates

If you spot a mistake after you hit submit, log back into the portal and edit the application from there.

Submitting by Mail

To file on paper, download the rebate form PDF for your equipment type from the Mass Save website. Fill in every field, sign and date the customer certification, and attach every required document. Mail the packet to:

Mass Save Residential Heating & Cooling Program
1337 Massachusetts Ave, PO Box #228
Arlington, MA 024764National Grid. Residential Air Source Heat Pump Rebate Form

Send it with tracking or certified mail so you have proof of delivery, and keep a full copy of everything you put in the envelope. For equipment installed in 2026, the completed form and supporting documentation must be received by February 28, 2027.1Mass Save. Air Source Heat Pumps Received, not postmarked. Give the mail a cushion.

Tracking, Corrections, and Payment

Once your application is in, use the Mass Save rebate status tool to check where it stands. You can search by confirmation number or by the email address you used on the application. Standard processing is six to eight weeks from the date the submission is received.7Mass Save. Residential Quick Tools and Resources Incomplete applications take longer because the program has to request corrections.

Rebates are paid either by check mailed to your service address or as a credit on your utility account. If you need to correct a mistake on a mailed application, or something has gone wrong, contact the rebate processing team:

Some applications get flagged for audit. The processing team may verify the installation through a site visit or phone inquiry before releasing payment. If that happens to you, having the contractor invoices and a copy of the submitted application within reach will move things along.

One Note on Federal Credits

If you were planning to stack a federal energy tax credit on top of your Mass Save rebate, the federal side is closed. The Energy Efficient Home Improvement Credit under Section 25C and the Residential Clean Energy Credit under Section 25D were both terminated for property placed in service after December 31, 2025.8Internal Revenue Service. FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D Under Public Law 119-21 For 2026 installations, the Mass Save rebate is the money. Getting the form right the first time is what puts it in your account.