Massachusetts has the most complete and layered solar incentive ecosystem on the East Coast — and possibly in the entire country. Massachusetts solar incentives 2026 stack a 15% state income tax credit, the SMART Program's fixed per-kilowatt-hour payments, a 20-year property tax exemption, a full sales tax exemption, virtual net metering, and the nation's highest average utility rates into a combination that produces some of the fastest solar payback periods anywhere in the United States. If you're a Massachusetts homeowner, this is the complete guide to every program available to you in 2026.
Federal Investment Tax Credit — 2026 Status
The federal solar ITC changed significantly in 2026. Here's the current picture for Massachusetts buyers:
- Residential ITC (Section 25D) — Expired: The 30% residential federal tax credit expired December 31, 2025. Massachusetts homeowners who installed solar before that date were eligible for the full 30% credit. New 2026 residential installations cannot claim Section 25D.
- Commercial ITC (Section 48E) — Active at 30%: Massachusetts business owners, commercial property owners, and self-employed individuals can still claim the 30% commercial Investment Tax Credit through 2027. Massachusetts has a strong commercial and mixed-use building sector, and the 30% commercial credit makes commercial solar exceptionally attractive.
Importantly, the expiration of the federal residential ITC does not diminish Massachusetts' status as the top state for residential solar ROI — because the remaining Massachusetts-specific programs are powerful enough to stand on their own.
Massachusetts 15% State Solar Tax Credit
Massachusetts is one of only a handful of states that still offers a meaningful residential solar income tax credit in 2026. Under Massachusetts General Laws Chapter 63, Section 38H and Chapter 62, Section 6(d), Massachusetts residents who install solar photovoltaic systems are eligible for a state income tax credit equal to 15% of the system cost, up to a maximum of $1,000.
While the $1,000 cap limits the credit's absolute value, it applies in addition to all other programs — making it effectively free money that requires only completing Schedule EC on your Massachusetts state tax return. On a $20,000 system, the credit offsets 5% of your cost at no additional effort.
The Massachusetts solar tax credit has a 3-year carryforward provision — if your state tax liability in the year of installation is less than $1,000, you can carry the unused portion forward to subsequent tax years.
The SMART Program (Solar Massachusetts Renewable Target)
The SMART Program is Massachusetts' flagship solar incentive — and it's unlike any program in the country. Rather than a one-time rebate, SMART provides fixed, guaranteed, per-kilowatt-hour payments for every kWh your solar system produces over a 10-year contract period, paid by your utility company.
Key SMART Program details for 2026:
- Payment structure: A fixed solar incentive rate ($/kWh) is set at program enrollment and guaranteed for 10 years, regardless of electricity market changes
- Eligible utilities: Eversource, National Grid, and Unitil — the three investor-owned utilities that together serve nearly all Massachusetts residential customers
- System size: Residential systems (typically up to 25 kW) are eligible for the residential SMART block rates
- Adders: The base SMART rate is increased by "adders" for low-income customers, paired battery storage, canopy installations, and other qualifying circumstances
- Block structure: SMART rates decline as each utility fills successive capacity blocks — earlier applicants receive higher rates, so timing matters
The SMART payment is separate from net metering. Your system earns SMART payments for electricity it produces AND earns net metering credits for electricity it exports to the grid. This double-dip structure — production payment plus retail-rate grid credit — is what makes Massachusetts solar economics so favorable.
Massachusetts 20-Year Property Tax Exemption
Massachusetts General Laws Chapter 59, Section 5(45) provides a 20-year property tax exemption for solar energy systems installed on residential and commercial properties. Unlike most states that offer permanent exemptions tied to ownership, Massachusetts' exemption is explicitly codified for a 20-year term — which covers the vast majority of a system's productive lifespan.
With Massachusetts average effective property tax rates among the higher rates in the Northeast (approximately 1.17% statewide, with rates in many communities well above that), this exemption produces significant cumulative savings. A solar installation that adds $30,000 in home value, in a municipality with a 1.5% effective rate, saves $450/year — or $9,000 over the 20-year exemption period.
Massachusetts Sales Tax Exemption
Massachusetts provides a full sales tax exemption on solar energy equipment under Massachusetts General Laws Chapter 64H, Section 6(dd). The state's 6.25% sales tax is waived on qualifying solar energy equipment purchases and installation costs.
On a $25,000 system, this exemption saves $1,562.50 at the point of purchase — with no application required. The exemption applies automatically when purchasing from a qualified Massachusetts solar contractor.
Virtual Net Metering in Massachusetts
Massachusetts offers both standard net metering and virtual net metering — one of the more progressive solar compensation policies in the country. Virtual net metering allows solar electricity production credits to be shared across multiple electric meters, even if the panels and the meters are not at the same location.
For Massachusetts homeowners, this means:
- Renters and condo owners who cannot install on their own property can subscribe to a community solar project and receive net metering credits directly on their utility bill
- Property owners with multiple metered buildings can offset consumption across all meters with a single solar installation
- Businesses with separated operations can share solar credits between facilities
Standard residential net metering in Massachusetts operates at the full retail rate — currently approximately $0.23/kWh — making each exported kilowatt-hour worth 23 cents in bill credit. At this rate, every additional kWh your system produces above your immediate consumption still delivers maximum value.
| Incentive | Value | Status |
|---|---|---|
| Federal Residential ITC (Section 25D) | 30% | Expired Dec 31, 2025 |
| Federal Commercial ITC (Section 48E) | 30% | Active through 2027 |
| MA State Solar Tax Credit | 15% (up to $1,000) | Active — annual credit |
| SMART Program Payments | Fixed $/kWh for 10 years | Active — Eversource, National Grid, Unitil |
| Property Tax Exemption | 100% for 20 years | Active — MGL Ch. 59 § 5(45) |
| Sales Tax Exemption | 100% (6.25% state rate) | Active — MGL Ch. 64H § 6(dd) |
| Net Metering Rate | Full retail (~$0.23/kWh) | Active — highest in continental US |
Why Massachusetts Has the Best Solar ROI in the Country
The financial case for Massachusetts solar is unique because of how the incentive layers interact with the state's electricity rate:
- $0.23/kWh utility rate — the highest in the continental US outside Hawaii. Every kWh your system produces offsets electricity you'd otherwise buy at this premium rate.
- SMART Program payments — an additional revenue stream on top of your utility savings, guaranteed for 10 years regardless of market changes
- $285/month average savings — Massachusetts solar owners achieve the highest average monthly utility savings of any state in the contiguous US
- 4.5 peak sun hours/day average — while not the sunniest state, Massachusetts receives adequate solar resource to make properly sized systems highly productive
- Stacked exemptions — property tax + sales tax + state income credit + SMART = the most complete incentive stack in the country
The payback period for a Massachusetts solar installation with SMART Program participation typically falls in the 6–8 year range for residential buyers in 2026 — with 25-year total net savings well above $50,000 for most households, factoring in electricity cost escalation.
SREC II Program for Legacy Massachusetts Systems
Massachusetts' Solar Carve-Out II (SREC II) program was the predecessor to SMART. Systems enrolled in SREC II continue to earn solar renewable energy credits under that program's structure. If you have an existing Massachusetts solar system that was enrolled in SREC II before the SMART transition, you may still be generating and selling SRECs under legacy program rules. Legacy Energy can review your system's enrollment status and help maximize your ongoing SREC revenue.
How to Maximize Massachusetts Solar Incentives in 2026
- Enroll in SMART as early as possible. SMART block rates decline as program capacity fills. Earlier enrollment locks in higher per-kWh payment rates for the full 10-year contract. Legacy Energy monitors block availability and submits SMART applications as part of every Massachusetts project.
- Claim the state income tax credit. The 15% MA credit (up to $1,000) requires filing Schedule EC with your state return. It's straightforward — but it's yours to claim only if you do it. Legacy Energy's project coordinators remind every MA customer to file for this credit after installation.
- Get the SMART + net metering combination right. Massachusetts' dual compensation structure (SMART production payments + net metering export credits) requires careful system sizing and utility enrollment coordination. Legacy Energy handles the full SMART application and interconnection agreement for every project.
- Leverage virtual net metering if applicable. Property owners, landlords, and commercial buyers may qualify for additional virtual net metering credits across multiple meters — increasing total incentive capture significantly.
- Business owners: add the 30% commercial ITC. Commercial Massachusetts buyers can stack the Section 48E credit on top of SMART, the state credit, and both tax exemptions — creating one of the strongest combined incentive packages available to any solar buyer in the US.
Get your complete Massachusetts solar incentive breakdown
Legacy Energy handles SMART Program applications, state tax credit documentation, and all utility paperwork for Massachusetts customers. See exactly how much you can save — free, no obligation.
Massachusetts earned its reputation as the best state for solar ROI, and in 2026, that reputation is fully justified. The combination of the highest utility rates in the continental US, the uniquely structured SMART Program, the state income tax credit, permanent tax exemptions, and full retail net metering creates a financial environment where solar doesn't just pay for itself — it generates ongoing returns that compound for 25 years. If you're a Massachusetts homeowner or business owner and you haven't gone solar yet, 2026 is the year to act — SMART block rates only go one direction, and the sooner you enroll, the better your rate.
