Insulation and Air Sealing Rebates
Xcel Energy 2026 Rebate Summary for Colorado residential, effective 2026-10-01. Standard rebate (customers who heat with electricity or natural gas from Xcel Energy): air sealing 30% of project cost up to $400 (20% reduction in CFM50); wall insulation 30% up to $350 (empty wall cavity before, R-13 or greater after); attic insulation 30% up to $500 (below R-24 before, R-60 or greater after). Bonus for customers who heat with Xcel natural gas: 1.5 times the standard rebate on top of it (total = standard + bonus, so up to $1,000 air sealing, $875 wall, $1,250 attic; $3,125 for all three); the invoice must be dated in 2026 and the cap applies to the standard rebate. Customers with Xcel electric service and central AC whose heating fuel is not from Xcel: $15 air sealing, $25 wall, $60 attic. Base rebate plus bonus cannot exceed the invoiced cost. $600 bonus when qualifying insulation and air sealing are installed before an Xcel rebate-qualifying space-heating heat pump, invoices within two years of each other. Eligible for the 25% Whole Home Efficiency bonus; attic insulation rebates are structured differently (higher) through Whole Home Efficiency. Must be done by a current Xcel participating insulation and air sealing contractor (BPI-certified technicians). Not eligible: new construction or additions, garages, sheds, workshops, below-ground basements, insulated doors, mobile homes, and buildings with more than four units. Rentals are eligible. Xcel's web page still lists older requirements (attic below R-15 to R-49, NACH50) and a $500 bonus-section cap; the dated summary is newer.
Xcel Energy Colorado pays 30% of the cost of air sealing (up to $400), wall insulation (up to $350) and attic insulation (up to $500), done by a participating contractor. Customers who heat with Xcel natural gas get a bonus of 1.5 times the standard rebate on 2026 invoices.
Guidance
Xcel Energy Colorado pays 30% of the cost of air sealing, wall insulation and attic insulation done by a participating contractor, up to $400, $350 and $500. Customers who heat with Xcel natural gas get a bonus of 1.5 times the standard rebate on 2026 invoices.
Homeowner Tasks
- Confirm your Xcel service
The full rebate is for homes heated by Xcel natural gas or Xcel electricity; Xcel electric customers with central AC and other heating fuel get the lower tier.
- Hire a participating contractor
Choose a contractor from Xcel's participating insulation and air sealing list.
- Sign the rebate application
Renters can assign the rebate to the owner in the Alternate Rebate Recipient section.
Contractor Tasks
- Test and document the work
Air sealing must cut CFM50 leakage by at least 20%; record pre- and post-job R-values (walls empty to R-13+, attic below R-24 to R-60+).
- Submit the application
Submit through Xcel's digital application by July 31 of the year after the work.
Qualification
No special qualification flags for this rebate.
Not required: energy star certified equipment · ahri matched pair · income-qualified · has income-qualified portion · pre-approval required · permit required · contractor enrollment required · fuel switching required
How to Submit
The participating contractor completes the work; submit through Xcel's digital application with the invoice and test results. Applications are due July 31 of the year after the upgrades are completed. Expect payment in about eight weeks.