Montana still nets solar at the full retail rate, a deal its regulators defended and most states abandoned. The trap is a single date: once a year, at your settle-up month, every unused credit resets to zero. Bank a summer of surplus into the wrong month and Montana law simply deletes it. Size right and pick that date deliberately, and Big Sky solar quietly outperforms its reputation. EcoGen America handles both decisions.
Get your feasibility score, cost estimate & installer matches.
Montana still nets solar at the full retail rate, a deal its regulators defended while most states abandoned it.
The trap is a single date: once a year, at your settle-up month, every unused credit resets to zero. Bank a summer of surplus into the wrong month and Montana law simply deletes it.
The fix costs nothing: pick the reset month deliberately, so winter has spent your summer banking before the counter clears, and size the system so there is little left to lose.
EcoGen America handles both decisions, and Big Sky solar quietly outperforms its reputation when they are made right.
The annual credit reset is Montana's whole trap. We time it so the winter draw-down spends your summer surplus before the state erases it.
Built-in checks for right-sizing against annual usage, reset-month handling, and production estimates honest about Montana winters.
We track NorthWestern Energy netting terms and the PSC decisions that keep Montana crediting at full retail.
Your data is only shared with the licensed Montana installers you choose.
EcoGen is 100% free for homeowners. We earn a small referral fee from installers only when you choose to proceed with a project through our platform.
Montana’s netting is generous right up until one date on the calendar. How the reset works, and how to beat it:
The Rule | What Happens | The Countermove |
|---|---|---|
Monthly banking | Surplus credits roll forward at full retail value | Bank summer production against winter bills, as designed |
Annual settle-up | Remaining credits reset to zero, uncompensated | Choose a settle-up month at winter’s end, when the bank is naturally empty |
Oversizing | Chronic surplus feeds the annual deletion | Size to roughly 100% of annual usage, not the roof’s maximum |
Handled deliberately, the reset costs a well-designed system almost nothing. Ignored, it quietly deletes a month or two of production every year.
Montana summers produce hard. Retail-rate banking turns July sun into January heat, if the system is sized to spend it.
Set your settle-up month at the end of heating season. It is one form field that protects a winter's worth of credits.
Design so the bank empties before the reset: size near annual usage and let winter draw it down.
Free 15-minute call. Sizing, timing, Montana math.
Montana solar owners hold a stronger legal position than most, worth knowing when a sales pitch turns apocalyptic or a neighbor turns skeptical:
In a region where Idaho pays 2.9¢ off-peak and Wyoming saves rather than earns, Montana’s retail netting is the quiet outlier worth acting on while it stands.
Montana Contract Checks
Retail netting with a reset invites specific mistakes. These four catch them.
A projection that rolls credits forever overstates value. The annual zero-out belongs in the math.
The reset date is selectable and most installers never mention it. End of heating season is the right answer.
Chronic overproduction feeds the deletion. Montana rewards accuracy over ambition.
Montana roofs carry real snow. Mounting spec and structural review are not formalities here.
Four checks, any Montana quote. Good installers answer them without blinking.
Vetted for Montana coverage, NorthWestern interconnection experience and complaint history.
Retail netting forgives a lot, but not everything:
Everyone else under that big sky: retail netting plus right-sizing makes Montana one of the Mountain West’s better-kept solar secrets.
Priced against the going rate with the annual reset in the model.
15 minutes, independent. Banking, timing, sizing, verdict.
Talk to a Montana AdvisorNo obligation. 100% free service.
Yes, real one-to-one retail crediting at NorthWestern Energy, protected by the PSC until rooftop adoption reaches 5% of peak load.
Cooperative territories set their own terms, so rural customers should get their co-op’s tariff in writing.
At your annual settle-up month they reset to zero, with no cash-out. That single rule shapes good Montana design: size near your annual usage and set the settle-up month at the end of heating season so the bank empties naturally first.
Handled deliberately, the reset costs a well-designed system almost nothing.
For owned roofs with decent sun, yes: full retail netting is the strongest export deal in the Mountain West, and summer banking carries winter bills.
The failures are oversized arrays feeding the annual reset and shaded roofs that never produce the credits in the first place.
No state credit remains, and the federal residential credit ended in December 2025.
Montana’s incentive is structural: retail-rate netting that most states no longer offer. It shows up on the bill rather than the tax return.
The rates, program terms and figures on this page come from the records below. Sources accessed between June 11, 2026 and August 20, 2026.
Dean Mahmoud is the CEO of EcoGen America. He has connected tens of thousands of homeowners with residential solar installers across all 50 states since 2021, and works directly with installation companies on solar pricing, financing, and what homeowners actually pay for rooftop solar.
in