New Mexico is one of the best remaining states for residential solar in 2026 — 300+ sunny days a year, full 1:1 retail-rate net metering on PNM, and a state income tax credit that does real work. Our model puts typical payback near ~10 years. With the federal credit still in place that would have been closer to ~6, so the math has stretched — but the underlying structure is exceptionally solid.
The headline: PNM credits roll over indefinitely month-to-month, which is unusual even among 1:1 net metering states. Florida and Virginia are 1:1 with annual true-ups; PNM has no annual reset. That alone shifts how you size a system.
If you're on a different NM utility (El Paso Electric in Las Cruces, or Xcel/SPS in the northeast), the terms are different — read the utility section before assuming any of this applies to you.
What changed
The federal Residential Clean Energy Credit (§25D) — the 30% homeowner credit — was repealed for systems installed after December 31, 2025. For 2026 New Mexico buyers, the federal credit on solar is $0. The same applies to home batteries purchased outright. The §48E commercial credit (30%) still exists, but only for leased or third-party-owned systems — the lessor claims it, not you. Full federal context here.
VERIFIED 2026-06 · irs.govNet metering: PNM is unusually generous
NM's net metering rules depend on which utility serves you — this calculator models PNM, the dominant utility for Albuquerque, Santa Fe, and Rio Rancho.
PNM (Public Service Company of New Mexico). Full retail 1:1 net metering. Credits roll over month-to-month indefinitely — no annual true-up reset. Most net-metering states cash out year-end excess at avoided-cost (a few cents per kWh); PNM doesn't. That makes oversizing far less punishing here than in Florida or Virginia.
El Paso Electric (Las Cruces and southern NM). Retail-rate credits within the month, but month-end surplus is paid out at a lower purchased-power rate — substantially worse than PNM. If you're on El Paso Electric, expect smaller export value than the calculator shows.
Xcel/SPS (northeastern NM). 1:1 monthly net metering with a check issued at $50 of accumulated credit.
NM retail electricity on PNM is about ~14¢/kWh and rising — PNM raised rates in phases during 2026. APCo and Xcel territories differ.
PNM Performance-Based credit (not modeled). PNM also pays a small additional ~$0.0025/kWh of production for 8 years, with a $20 payout threshold — an SREC-like minor bonus. We don't model it; your real PNM payback may be marginally better than the calculator shows.
State credit: NSMDTC, 10% up to $6,000
The New Solar Market Development Tax Credit (NSMDTC) is one of NM's biggest solar advantages — and one of the reasons NM payback is shorter than neighboring Arizona's.
- 10% of total system cost (equipment, materials, and labor).
- Capped at $6,000 per taxpayer per year.
- Available through December 31, 2031.
- Carries forward if it exceeds your state tax liability.
- Annual program budget $30 million (raised from $12M by SB 121), allocated first-come, first-served — apply via NM EMNRD after install.
- Statute: NMAC 3.3.14.
A note on a 2026 expansion bill: there's a proposal in committee to raise NSMDTC to 30% / $15,000. It is not law and we do not model it. If you see a quote citing 30% / $15,000 as the NM credit, that quote is wrong about current law as of June 2026.
Refundable status: EMNRD describes NSMDTC as nonrefundable with carryforward (i.e., it reduces your state tax bill, and unused portions roll to future years). Some blogs and quotes describe it as refundable. The carryforward is well established; the refundable claim is disputed. Verify refundable status directly with EMNRD before assuming you'll get a check back rather than a tax bill reduction.
VERIFIED 2026-06 · NMAC 3.3.14; NM EMNRDExemptions: GRT and property tax
NM has a quirk in how its taxes work. New Mexico doesn't have a traditional sales tax — it has a gross receipts tax (GRT) instead. Solar equipment is exempt from GRT, which is the practical equivalent of a sales tax exemption in other states.
Property tax: New Mexico's residential valuation limitation means solar additions do not raise residential property tax. Functionally, that's a property tax exemption for your system.
VERIFIED 2026-06 · eia.govBattery in New Mexico
Under PNM's 1:1 net metering with indefinite rollover, the retail-export gap is effectively zero, like Florida and Virginia. On pure energy arbitrage, a battery in NM doesn't pay off. Any energy you'd send through a battery could have been banked as a net-metering credit instead — and PNM's indefinite rollover means those credits don't expire.
The reason to install a battery in NM is backup / resilience, not export economics. There's no federal credit on the battery purchase in 2026 (§25D repealed), and NM's state battery storage bill (HB 51) is in committee but not passed — no state battery credit applies in 2026. If HB 51 passes later, the math will change; until then, don't assume a battery improves payback in NM.
The honest picture
New Mexico solar in 2026:
- Federal credit: $0 — not 30%.
- State credit: 10% up to $6,000/year (NSMDTC), through 2031. Carries forward; verify refundable status with EMNRD.
- 2026 expansion to 30% / $15,000 is NOT law — bill in committee.
- Net metering on PNM: 1:1 retail, credits roll over indefinitely month-to-month. Among the most generous in the US.
- El Paso Electric (Las Cruces) and Xcel/SPS (NE NM) have different terms — verify your utility.
- Retail rate: ~14¢/kWh on PNM, rising.
- Gross receipts tax exemption: yes.
- Property tax: effectively exempt (residential valuation limitation).
- Battery: weak on arbitrage (1:1 + indefinite rollover = no gap). Economic case is backup, not exports.
- HB 51 (state battery credit): in committee, not passed.
- PNM Performance-Based credit: ~$0.0025/kWh × 8 years (not modeled — minor bonus).
- Typical payback: ~10 years (would have been ~6 with the federal credit).
NM stands out for a specific reason: the combination is rare. Indefinite rollover net metering, a real (not symbolic) state credit, and both major tax exemptions actually apply. The contrast with neighboring Arizona is sharp — Arizona uses net billing (exports paid at a fraction of retail) and has a state credit capped at just $1,000. Same desert, very different economics. (Full Arizona detail here.)
Before you commit:
- Confirm whether your utility is PNM, El Paso Electric, or Xcel/SPS — only PNM has the indefinite rollover.
- Apply for NSMDTC via EMNRD promptly after install — the $30M annual budget is first-come, first-served.
- Verify refundable status of NSMDTC with EMNRD directly.
- Don't model HB 51 battery credit until/unless it passes.
- Don't model the 2026 30%/$15k expansion — it's a bill, not law.
- Treat PNM Performance-Based as a small bonus, not a base assumption.
- Run the calculator with your actual ZIP and system size.
Estimates only — net metering depends on your utility (PNM / El Paso Electric / Xcel). Verify with your utility and a licensed installer. This is not financial advice.