Rocky Mountain Power Window Rebates 2026: How to Qualify and Apply

With the federal window tax credit expired as of December 31, 2025, Rocky Mountain Power's Wattsmart rebate program has become the single largest incentive available to most Utah homeowners for window replacement. This step-by-step guide walks you through qualifying, applying, and receiving your rebate in 2026.

For the complete picture of every 2026 savings program, see our Utah window rebates and incentives guide.

Why Wattsmart Rebates Matter More in 2026

Before the federal tax credit expiration, many homeowners focused primarily on the $600 federal credit and treated utility rebates as a secondary bonus. In 2026, the dynamic has flipped. Rocky Mountain Power's Wattsmart rebate is now your primary incentive, and maximizing it should be a core part of your window replacement strategy.

On a 10-window project, Wattsmart rebates can yield $300 to $540 depending on your window specifications and sizes. Combined with Dominion Energy ThermWise rebates and contractor discounts, you can still achieve 15% to 25% savings without the federal credit. See our 2026 savings stacking guide for the complete approach.

Current Rebate Tiers and Amounts

Rocky Mountain Power offers two rebate tiers based on the U-factor of your new windows:

Tier	U-Factor Requirement	Rebate per Square Foot	Typical per Window (15 sqft)
Tier 1 (Best)	0.22 or lower	$3.00	$45
Tier 2	0.23 to 0.25	$2.00	$30

The rebate is calculated on the glass area of the window, not the overall frame dimensions. Glass area is measured from the inside edges of the window frame.

Why the Higher Tier Is Worth Targeting

The price difference between a window with a U-factor of 0.24 and one with a U-factor of 0.22 is typically $10 to $25 per window. But the rebate difference is $15 per window on a standard 15-square-foot window (the difference between $30 and $45). On a 10-window project, targeting the higher tier yields an extra $150 in rebates for an extra $100 to $250 in window cost. In most cases, the higher tier window pays for its own premium through the larger rebate.

Step 1: Verify Your Eligibility

Before selecting windows or scheduling installation, confirm that you qualify for the Wattsmart rebate:

• Service territory: Your home must be served by Rocky Mountain Power for electricity. Check your electric bill to confirm.
• Residential property: The rebate applies to residential homes. Commercial properties have separate programs.
• Replacement windows: You must be replacing existing windows, not installing windows in new construction.
• Active account: Your Rocky Mountain Power account must be active and in good standing.

If you are served by a different utility (Provo City Power, Murray City Power, etc.), check with your provider for their own rebate programs. See our pillar guide for details on other utility programs.

Step 2: Choose Qualifying Windows

Your new windows must meet these specifications:

• NFRC certified: The windows must have certified ratings from the National Fenestration Rating Council
• U-factor of 0.25 or lower: This is the minimum to qualify for any rebate
• Energy Star certified: While not always explicitly required, Energy Star certification ensures your windows meet the U-factor threshold

How to Read the NFRC Label

Every qualifying window comes with an NFRC label that shows its performance ratings:

• U-Factor: Measures heat transfer. Lower numbers are better. Look for 0.22 or lower for Tier 1.
• Solar Heat Gain Coefficient (SHGC): Measures how much solar radiation passes through. Not directly relevant to the rebate but important for comfort.
• Visible Transmittance (VT): Measures how much visible light passes through.
• Air Leakage (AL): Measures how much air leaks through the window.

Ask your contractor to confirm the U-factor rating before installation. Keep the NFRC labels, as you will need them for your rebate application.

Step 3: Complete Professional Installation

Wattsmart rebates require professional installation by a licensed contractor:

• Licensed and insured: Your contractor must hold a valid Utah contractor license
• Proper installation: Windows must be installed according to manufacturer specifications
• Building permit: If required by your jurisdiction, a building permit should be obtained

Get quotes from at least three contractors. Ask specifically about their experience with the Wattsmart rebate program. Some contractors are Wattsmart partners and can streamline the documentation process.

For guidance on selecting an installer, see our choosing a window installer in Utah guide.

Step 4: Gather Documentation

Before submitting your rebate application, collect these documents:

1. NFRC labels: One label per window showing the certified U-factor rating. Photograph them before installation, as they are sometimes removed during the process.
2. Contractor invoice: Itemized invoice showing window model numbers, quantities, sizes, installation date, and total cost. The invoice should clearly show the window specifications.
3. Rocky Mountain Power account number: Found on your electric bill.
4. Proof of installation date: The invoice serves this purpose, but keep any additional confirmation.

Documentation Tips

• Photograph everything: Take photos of NFRC labels, installed windows, and the contractor invoice
• Request itemized invoices: Generic invoices that do not list individual window specifications can delay your application
• Save manufacturer spec sheets: These serve as backup documentation if NFRC labels are lost

Step 5: Submit Your Application

Submit your rebate application through the Wattsmart online portal:

1. Visit rockymountainpower.net/savings-energy/rebates.html
2. Select the window rebate program
3. Log in with your Rocky Mountain Power account
4. Complete the application form with your project details
5. Upload your documentation (NFRC labels, invoice, etc.)
6. Submit the application

Critical Deadline

You must submit your application within 90 days of installation. This deadline is strict. We recommend applying within 30 days to avoid any last-minute issues. Set a calendar reminder for 60 days post-installation as a safety net.

Step 6: Track and Receive Your Rebate

After submission:

• Review period: Rocky Mountain Power reviews your application, typically within 2 to 4 weeks
• Approval notification: You will receive an email or letter confirming approval
• Payment: Rebate is issued as a check or bill credit within 4 to 8 weeks of approval
• Total timeline: From installation to rebate in hand, expect 6 to 12 weeks

If your application is denied or requires additional information, respond promptly. Common reasons for delays include missing NFRC labels, invoices that do not show individual window specifications, or windows that do not meet the minimum U-factor requirement.

Pro Tips for Maximizing Your Wattsmart Rebate

Choose Larger Windows Where Possible

The rebate is per square foot, so larger windows yield larger rebates. If you are choosing between window styles, consider that a large casement window has more glass area than two small double-hung windows in the same opening.

Upgrade to Tier 1 Specifications

As noted above, the premium for U-factor 0.22 versus 0.24 is usually less than the additional rebate amount. This is especially true for larger windows where the per-square-foot rebate difference adds up quickly.

Combine with Dominion Energy ThermWise

If your home also uses Dominion Energy for natural gas heating, you can claim ThermWise rebates in addition to Wattsmart. These programs address different energy sources and do not conflict. Learn more about combining programs in our savings stacking guide.

Time Your Project Strategically

While the Wattsmart rebate is available year-round, pairing it with contractor off-season discounts (December through February) and manufacturer promotions (spring and fall) maximizes your total savings. Read our guide on the best time to replace windows in Utah for timing strategies.

Ask Your Contractor for Help

Many experienced Utah window contractors are familiar with the Wattsmart application process. Some will even handle the paperwork for you. Ask about this when getting quotes, as it can save you time and reduce the risk of application errors.

The Wattsmart rebate is straightforward to claim and puts real money back in your pocket. With the federal tax credit no longer available, taking full advantage of this program is essential for every Utah window replacement project in 2026. For the complete savings strategy, visit our 2026 Utah window rebates and incentives guide.