How to Stack Massachusetts Energy Rebates
Don't leave money on the table. Learn which rebates combine—and how to claim them all—for maximum savings on your energy upgrade.
Key insight: Most Massachusetts homeowners can combine 2-4 incentive programs on a single project, potentially saving $5,000 to $20,000+.
Utility Rebates
Mass Save rebates from Eversource, National Grid, etc. Applied at purchase or via rebate check.
Federal Tax Credits
25C (efficiency) and 25D (solar) were repealed on 31 December 2025. The Massachusetts Schedule EC credit remains: 15% up to $1,000.
Performance Incentives
SMART (solar), Connected Solutions (battery). Ongoing payments based on energy produced/stored.
Real Stacking Examples
See how different incentives combine for common Massachusetts projects. These are typical scenarios—your actual savings may vary based on equipment, contractor, and eligibility.
Heat Pump Installation
Heat Pump (Income-Qualified)
Solar + Battery Storage
Insulation + Air Sealing
Windows + Heat Pump Water Heater
What Stacks With What
Quick reference for which Massachusetts incentives can be combined.
Mass Save + Federal Tax Credits
No longer possible for 2026 work. The federal 25C and 25D credits were repealed effective 31 December 2025, so there is no federal credit left to stack on top of a Mass Save rebate.
Multiple Mass Save Rebates
You can claim rebates for different project types (e.g., heat pump + insulation + thermostat) in the same year.
SMART Solar + MA Schedule EC credit
SMART payments do not affect the Massachusetts credit. The federal 25D credit that used to stack here was repealed on 31 December 2025.
Connected Solutions + SMART
Battery storage can earn Connected Solutions payments AND contribute to your SMART solar system.
Income-Qualified + Federal Credits
No federal credit remains to claim. This mattered less here than elsewhere: a credit only helps if you owe enough tax to absorb it.
Multiple Utility Rebates
You cannot claim the same rebate from both your electric and gas utility. Choose the higher one.
25C + 25D Tax Credits
Both were repealed effective 31 December 2025. Through 2025 they were separate credits with separate limits.
How to Claim Stacked Rebates (Step by Step)
- 1
Schedule a Home Energy Assessment
Start with a free Mass Save energy audit. This unlocks the highest rebate tiers and helps identify all eligible upgrades. Book at MassSave.com.
- 2
Get Quotes & Verify Rebate Eligibility
Get multiple contractor quotes. Confirm equipment models are rebate-eligible (check AHRI certification for heat pumps, ENERGY STAR for other equipment).
- 3
Apply for Mass Save Rebate
Submit your rebate application through Mass Save within 90 days of purchase. Some contractors apply on your behalf. Keep all receipts and documentation.
- 4
Check the Massachusetts Credit
There is no federal credit to calculate for 2026 work — 25C and 25D ended on 31 December 2025. For renewable energy property, Massachusetts still offers 15% of net expenditure up to $1,000 on Schedule EC.
- 5
Claim on Your Tax Return
File Massachusetts Schedule EC with your state return; unused credit carries over for three years. If you finished a solar or geothermal installation before 31 December 2025 and could not absorb the full federal 25D credit, that unused amount still carries forward onto later returns.
- 6
Enroll in Performance Programs (if applicable)
For solar: enroll in SMART through your installer. For battery storage: sign up for Connected Solutions through your utility. These provide ongoing payments.
Frequently Asked Questions
Can I stack federal tax credits with Mass Save rebates?
Not for work done in 2026. The federal 25C and 25D credits were repealed effective 31 December 2025. Mass Save rebates still stack with each other and with utility programmes like ConnectedSolutions, and the Massachusetts Schedule EC credit (15%, up to $1,000) survives. If your project was completed during 2025, the federal credits still apply to that tax year.
Is there a limit to how many rebates I can claim?
There's no limit to the number of different rebate programs you can use. However, each program has its own per-household limits (e.g., 2 smart thermostats, lifetime limits on heat pump rebates).
What order should I apply for rebates?
Apply for Mass Save rebates first (they're applied at purchase or shortly after). There is no federal credit left to claim afterwards — 25C and 25D were repealed on 31 December 2025. The Massachusetts Schedule EC credit is claimed when you file your annual tax return, and it is calculated on your net expenditure after rebates.
Do I need to apply for all rebates at once?
No. Each program has its own application process and timeline. Mass Save rebates are typically applied for within 90 days of purchase. The Massachusetts Schedule EC credit is claimed on your annual tax return.
Can I get rebates if I already started my project?
For Mass Save: Usually yes, if you apply within 90 days of purchase/installation. For some programs, you may need pre-approval. The Massachusetts Schedule EC credit can be claimed any time before the filing deadline for that tax year.
What happens if rebates exceed my project cost?
Rebates are typically capped at your actual cost. You won't receive more than you spent. The Massachusetts Schedule EC credit works differently: it is capped at $1,000 regardless of what you spent, and unused credit carries over for three years.
Ready to Maximize Your Savings?
Start by finding which rebates are available for your specific utility and project type.
Information last verified: January 2026. Rebate amounts and eligibility may change. Always confirm with official sources before making decisions.