Is there still a solar tax credit for Longmont homeowners in 2026?
The 30% federal credit is gone for 2026 installations. What survives for Longmont: Colorado's own incentives and tax treatment - verified against state sources.
The 30% federal solar tax credit ended for installations finished after December 31, 2025 - Longmont systems completed in 2026 get $0 from it.
Installed home solar for Longmont homeowners averages about $2.58 a watt across the U.S. marketplace - roughly $30,960 for a 12 kW system before incentives.
Longmont, Colorado has about 99,818 residents, and its solar quotes are built from system size, roof complexity and export rules - not the town name.
The federal Residential Clean Energy Credit - the 30% one every solar ad still quotes - was repealed by the One Big Beautiful Bill Act signed July 4, 2025. Per the IRS, it is not available for any system placed in service after December 31, 2025, and 'placed in service' means the installation completion date, not the contract date.
If a salesperson in Longmont tells you a 30% federal tax credit applies to your 2026 installation, they are quoting a dead law. What may still exist: Colorado's own incentives and tax treatment, listed below, and lease/PPA arrangements where a company claims commercial credits - in which case the credit belongs to them, not you.
The 2026 numbers
| System size | Installed price (marketplace avg) | Notes |
|---|---|---|
| 6 kW | $15,480 | Small roof / low usage |
| 8 kW | $20,640 | Typical starter system |
| 10 kW | $25,800 | Family home with AC |
| 12 kW | $30,960 | Large home / EV charging |
| Home battery (optional) | $12,000-$16,000 | Backup power + self-consumption |
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The 30% federal tax credit is gone for 2026 installations
The federal Residential Clean Energy Credit (30%) was repealed by the One Big Beautiful Bill Act signed July 4, 2025. Per the IRS, the credit is not available for any property placed in service after December 31, 2025 - and the IRS counts the installation completion date, not the contract date.
Colorado rules that decide your payback
| Rule | Colorado status |
|---|---|
| Export compensation (net metering) | Colorado requires investor-owned utilities to offer net metering: under PUC Rule 3664 (4 CCR 723-3), excess generation is carried forward month to month and credited at a 1:1 ratio against the customer's retail kWh consumption, with any accrued excess credits compensated within 60 days after each calendar year at the utility's average hourly incremental cost of electricity supply, unless the customer makes a one-time written election to roll credits forward indefinitely. |
| State incentive | Colorado Sales and Use Tax Exemption for Components Used to Produce Energy from a Renewable Energy Source (Sec. 39-26-724, C.R.S.); utility rebates may also apply. |
| Sales tax on the system | Exempt |
| Property tax on added home value | Excluded |
A Colorado net-metered system may be sized to supply no more than 120 percent of the customer's average annual electricity consumption at the site, and unless the homeowner files a one-time written election to keep rolling credits over, leftover credits are cashed out each year at the utility's average hourly incremental cost - well below the retail rate the credits were originally worth.
This guide is research, not advice: an independent summary of published prices and state rules. It is not an installer, lender or tax advisor - verify incentive eligibility with a licensed tax professional before relying on it.
What this means for Longmont roofs
Whether solar still pays in Colorado after the federal credit's end comes down to arithmetic, not ideology: installed cost (about $2.58 a watt at the marketplace average), what your utility pays for exports, and how much of your generation you use yourself. High self-consumption - daytime usage, EV charging, batteries - is now the biggest lever.
This guide is research, not advice: an independent summary of published prices and state rules. It is not an installer, lender or tax advisor - verify incentive eligibility with a licensed tax professional before relying on it.
Getting Longmont quotes
Same-day contracts are a red flag in this industry. Legitimate CO installers expect you to compare bids, check licenses, and read the interconnection terms. Anyone pressuring you to sign at the kitchen table is pricing in your haste.
This guide is research, not advice: an independent summary of published prices and state rules. It is not an installer, lender or tax advisor - verify incentive eligibility with a licensed tax professional before relying on it.
Common questions
Is my roof even suitable for solar?
Three things decide it: orientation (south-facing is best in the U.S., east-west workable), shade (trees or taller buildings across midday hours can sink the math), and roof age (if the shingles have under 10 years left, reroof first - removing and reinstalling panels later costs thousands). Any honest installer assesses all three before quoting a number.
Does solar raise my property taxes?
It depends on the state - many exempt solar's added home value from property tax, others do not, and some exemptions have expiration dates. This guide's state page lists the verified rule and source for your state.
How long do solar panels actually last?
Panels are typically warrantied for 25 years of production and commonly outlive it, losing about 0.5% output per year. Inverters are the component that usually needs replacement - typically once, around year 12-15, at a few thousand dollars.
What happens if my installer goes out of business?
Panel and inverter warranties come from the manufacturers and survive, but the workmanship warranty usually dies with the company. That is a real risk in the post-credit shakeout - prefer installers with years of local history, and get manufacturer-backed workmanship coverage where offered.
What is net metering and why does it decide everything?
It is the rule for how your utility credits electricity you export. Full retail net metering credits exports at the same rate you pay - the grid works like a free battery. Net billing or avoided-cost rules pay far less per exported kWh, which lengthens payback and strengthens the case for a home battery.
Get solar quotes for Longmont
These platforms collect bids from licensed installers so you can compare against the same spec. Prices come from installers, not from this site.
Disclosure: this is an independent guide. If you request quotes through a link here, the platform may pay this site a referral fee. That fee never changes your quotes.