0% APR · Up to $25,000 · 7-Year Term · Stacks With Rebates

The 0% APR Mass Save HEAT Loan.

Mass Save's HEAT Loan finances rebate-eligible energy upgrades at 0% APR up to $25,000 over 7 years. Stacks with Mass Save rebates and federal tax credits. Pro Build files the paperwork as part of standard scope.

What the Mass Save HEAT Loan Actually Is

The Mass Save HEAT Loan is a 0% APR unsecured loan that finances energy efficiency upgrades on Massachusetts residential properties. "HEAT" stands for Home Energy Assistance Team. The loan is funded by participating Massachusetts banks and credit unions, with Mass Save buying down the interest to 0% on the homeowner's behalf.

It is not a Pro Build product, not a Mass Save program direct loan, not a HELOC. It is a third-party loan with subsidized interest. The homeowner makes monthly payments to the participating lender, exactly like any other personal loan — except the rate is 0%.

Terms and Limits

Interest rate
0% APR for the entire loan term. No rate-reset, no escalation.
Maximum amount
$25,000 per project. Higher amounts in some scenarios for income-eligible homeowners or whole-home electrification packages.
Term
Up to 7 years. Most homeowners select 5–7 years to minimize monthly payment.
Origination fees
None. The HEAT Loan has no application fee, no origination fee, no prepayment penalty.
Eligible upgrades
Heat pumps, insulation, air sealing, heat pump water heaters, ENERGY STAR windows, high-efficiency boilers (in some cases), solar paired with electrification, panel upgrades enabling electrification.
Eligible properties
1–4 unit Massachusetts residential properties. Must be the homeowner's primary residence or a long-term rental.

Need The 0% APR Mass Save HEAT Loan Help in Massachusetts?

5-min reply during business hours. Free written estimate within 24 hours. Massachusetts Licensed.

How HEAT Loan Stacks with Mass Save Rebate and Federal Credits

The HEAT Loan is designed to be stacked. A typical Massachusetts heat pump install:

  • Investment before rebate: $24,800
  • Mass Save rebate: –$9,400 (filed by Pro Build, posts 4–8 weeks after install)
  • HEAT Loan financing: $15,400 at 0% APR over 7 years = $183/month
  • Federal 25C credit: –$2,000 (claimed on your next federal tax return via IRS Form 5695)
  • Out-of-pocket at install: $0

Most homeowners pay the loan off ahead of schedule with the Mass Save rebate check and the next-year federal tax credit refund. The point is: the financing exists so you do not write a check at install.

How to Apply

Pro Build files the HEAT Loan paperwork as part of the standard rebate-eligible project scope. Sequence:

  1. Sign the Pro Build contract. We submit the project details to a participating Mass Save HEAT Loan lender (typically a Massachusetts credit union).
  2. The lender pulls a soft credit check. Approval is typically 1–3 business days. Underwriting requires a Mass Save program-eligible scope and a Massachusetts residential property.
  3. You sign the loan documents. Funds disburse direct to the contractor (Pro Build) at install milestones, or as a single payment at project completion depending on the lender.
  4. Monthly payments begin 30 days after disbursement. You can pay off the loan at any time with no penalty — most homeowners use the Mass Save rebate check and federal credit refund to accelerate payoff.

What the HEAT Loan Will Not Do

  • Not for non-eligible projects. If the underlying project is not Mass Save program-eligible (kitchen remodel, addition, deck), HEAT Loan financing is not available.
  • Not a credit-rebuild tool. Underwriting is real — typical approval threshold is mid-600s FICO. Income verification required.
  • Not a substitute for the rebate. The HEAT Loan finances what you owe after the rebate; it does not replace the rebate.
  • Not stackable across non-eligible scope. If you bundle heat pump install with a kitchen remodel, only the heat pump portion is HEAT Loan-eligible.

More Massachusetts Resources

  • Mass Save Rebates Guide

    Heat pump up to $10,000, insulation 75-100% covered, income-eligible enhanced thresholds. How we file the application on your behalf.

  • Federal Tax Credits (25C, 25D, 30D)

    Inflation Reduction Act credits stack with Mass Save. 25C up to $2,000 for heat pumps, 25D 30% for geothermal/solar, 30D EV. Filing form 5695.

  • Income-Eligible Electrification

    Mass Save income-eligible thresholds (60% SMI), $0 out-of-pocket installations, enhanced rebates, and how to document eligibility with one tax return.

  • 780 CMR Massachusetts Building Code

    What permits trigger which trades, residential vs commercial scope, inspection sequence, and homeowner vs contractor responsibilities.

  • Specialized Stretch Code (14 Cities)

    14 Massachusetts municipalities with stricter energy and electrification requirements on new construction and major renovations. Full list and what it means.

  • MA HIC Contract Protection (MGL c. 142A)

    1/3 maximum deposit, milestone payments, 3-day rescission, written contract requirements, MA HIC arbitration program. Every homeowner's legal floor.

  • Massachusetts Contractor Licensing

    CSL, MA HIC, Master Electrician, Master Plumber, Master Gas Fitter, EPA 608, BPI, Mass Save HPC. How to verify each license and avoid unlicensed contractors.

  • ACCA Manual J Load Calculation

    The residential HVAC heat-load standard. Most contractors skip it. We run it free on every quote — here's why it matters and how it works.

  • R-32 / R-454B Refrigerant Transition

    The federal AIM Act phased out R-410A. Mass Save now only rebates heat pumps using R-32 or R-454B. What changed, why, and how to verify compliant refrigerant.

View All Massachusetts Resources →

The Resource FAQs

Massachusetts The Resource Questions Answered.

Is the HEAT Loan really 0% APR?

Yes. The interest is bought down to 0% by Mass Save on the homeowner's behalf. The lender (a participating MA bank or credit union) extends the loan at the subsidized rate. There are no hidden fees, no escalation clauses.

Can I use the HEAT Loan for a project Pro Build did not sell me?

Yes — the HEAT Loan works with any Mass Save authorized contractor in Massachusetts. Pro Build is on the active list. If you want a Pro Build quote alongside, we are happy to provide one.

What credit score does the HEAT Loan require?

Typical underwriting threshold is mid-600s FICO. Some participating lenders are more flexible for income-eligible homeowners or for smaller loan amounts.

Can I pay off the HEAT Loan early?

Yes. No prepayment penalty. Most Massachusetts homeowners use the Mass Save rebate check (4–8 weeks after install) and the next-year federal tax credit refund to accelerate payoff.

Does the HEAT Loan cover a panel upgrade?

Yes, when the panel upgrade is required to enable an electrification scope (heat pump, EV charger, induction range). Standalone panel upgrades not tied to electrification are typically not HEAT Loan eligible.

Can I refinance the HEAT Loan into a HELOC?

You can pay off the HEAT Loan with HELOC funds, but at typical HELOC rates this rarely makes sense given the HEAT Loan is already 0% APR. The HEAT Loan is the cheapest financing available for Massachusetts energy upgrades.

Does the HEAT Loan affect my home equity or property tax?

No. The HEAT Loan is unsecured (not a lien on the property), does not appear on your title, and has no impact on property tax assessment.

How long does HEAT Loan approval take?

Typical approval is 1–3 business days from application submission. Pro Build submits on your behalf as part of the project intake.

Ready For Your Massachusetts Project?

5-min reply. Free written estimate within 24 hours. Massachusetts Licensed. We file every rebate on your behalf.