New Mexico’s clean energy build-out has handed its contractors a tax liability most of them never signed up for. Under the Inflation Reduction Act, a project owner’s federal credit is five times larger if every laborer and mechanic on the job was paid Davis-Bacon prevailing wages and a set share of the hours went to registered apprentices. The owner claims the credit, but the contractor controls the payroll, so owners push the obligation and the indemnity down the chain. With wind and solar deadlines now compressed into the next fifteen months, the pressure on New Mexico crews is about to peak, and the penalty math is severe enough to end a mid-sized contractor.
Why is 2026 through 2027 the pressure window in New Mexico?
The One Big Beautiful Bill Act, Pub. L. 119-21, rewrote the clean electricity credits in 26 U.S.C. § 45Y and § 48E so that wind and solar facilities placed in service after December 31, 2027 receive no credit unless construction began on or before July 4, 2026. Every New Mexico wind and solar project that made the July deadline is racing to finish by the end of next year, and every one is claiming the full five-times credit, which means compliance on every hour of construction. Storage, geothermal, and nuclear projects have longer runways, with phase-downs starting for construction that begins in 2034, and the state’s Energy Transition Act targets of 50 percent renewable by 2030 and 80 percent by 2040 assure a long pipeline. The SunZia wind project, 3,650 megawatts across San Miguel, Lincoln, and Torrance counties, reached commercial operation in June 2026 and will be audited for years. One complication for begin-construction dates: the IRS notice that had eliminated the five percent safe harbor for larger projects, Notice 2025-42, was vacated by a federal district court in June 2026, so contractors should get the owner’s written position on when construction began rather than assume it.
What do the prevailing wage rules require?
Under 26 U.S.C. § 45(b)(7) and its parallels, every laborer and mechanic employed by the owner, the contractor, or any subcontractor in the construction of the facility, and in alteration or repair during the first ten years of operation, must be paid at least the prevailing wage the Department of Labor has determined for the classification and the locality. The rates come from the wage determinations posted on sam.gov by county and construction type; a project spanning counties may need more than one. When a classification doesn’t exist, which happens constantly for wind technicians and battery installers, the contractor requests a supplemental determination from the Department of Labor, which under the IRS’s July 2026 guidance must be requested no more than 90 days before the contract is executed and is valid for 180 days. The regime is enforced by the IRS through the owner’s return, not by the Department of Labor, and it’s distinct from New Mexico’s own Public Works Minimum Wage Act, NMSA 1978 § 13-4-11, which applies to state and local government projects over $60,000 and uses rates set by the Department of Workforce Solutions. A municipal utility that takes elective pay on a solar array it also funds with state money faces both regimes and pays the higher rate for each classification.
What does a wage mistake cost?
The cure provisions in § 45(b)(7)(B) and Treas. Reg. § 1.45-7 preserve the credit if the owner pays each underpaid worker the shortfall plus interest at the federal underpayment rate increased by six percentage points, and pays the IRS a penalty of $5,000 per affected worker. For intentional disregard the shortfall is trebled and the per-worker penalty rises to $10,000. Consider a Roswell electrical subcontractor with 60 workers in one classification underpaid by $2 an hour for 1,000 hours each over two quarters. Back wages are $120,000, interest at roughly 13 percent accrues, and the penalty is $300,000, most of which the owner’s indemnity will send back to the subcontractor. Two regulatory safe harbors change that outcome. Under § 1.45-7(c)(6), the penalty is waived if the correction is paid by the last day of the first month after the quarter ends and either the underpayment affected no more than 10 percent of pay periods or the shortfall was under 5 percent of required wages. And under § 1.45-7(c)(3)(v), correcting and paying the penalty before receiving an IRS examination notice creates a rebuttable presumption that the error wasn’t intentional. The lesson is quarterly self-audits with a correction procedure that runs in weeks, because the alternative is an IRS finding years later and a 180-day payment window under § 1.45-7(c)(4).
How does the apprenticeship rule work in rural New Mexico?
Section 45(b)(8) requires that at least 15 percent of total labor hours on facilities that began construction after 2023 be performed by qualified apprentices from registered programs, that the applicable apprentice-to-journeyworker ratio be met each day, and that any contractor or subcontractor with four or more employees on the job employ at least one apprentice. The penalty for a shortfall is $50 per missing labor hour, or $500 if intentional. On a 100,000-hour project, a 5,000-hour shortfall is $250,000. The good-faith effort exception is what makes the rule workable in Catron, Union, or Hidalgo counties, where no registered program may operate. Under Treas. Reg. § 1.45-8, a written request to a registered program at least 45 days before the work, followed by a denial or by no response within five business days, satisfies the requirement for 365 days, after which the request must be renewed. Requests should go to programs listed with the state apprenticeship office at the Department of Workforce Solutions, and the proof should be kept. The exception is a paperwork defense, lost by contractors who couldn’t find apprentices and never asked.
How do tribal projects fit in?
Indian tribal governments, their subdivisions, and, under regulations finalized in December 2025, wholly tribally owned entities and Section 17 corporations can claim the credits as direct payments under 26 U.S.C. § 6417, which has made solar and storage projects on pueblo and Navajo Nation land some of the most active in the state. The prevailing wage and apprenticeship rules apply to elective-pay claimants exactly as they apply to taxable owners, and the five-times multiplier is the same. The practical problem is that the Department of Labor publishes wage determinations by county, not by reservation, so a project at Zuni uses the McKinley County determination and a Navajo Nation project may need supplemental determinations for classifications the county rate doesn’t cover. Tribal employment preference laws and TERO fees sit on top of the federal rules rather than replacing them, and tribal apprenticeship programs count only if registered with the Department of Labor or a recognized state agency, which contractors should confirm before counting the hours.
What belongs in the subcontract?
Three things. First, a defined compliance scope: which wage determination governs, who requests supplemental determinations, how apprenticeship hours are allocated among tiers, and who bears another subcontractor’s shortfall. Second, a records clause tracking Treas. Reg. § 1.45-12: certified payrolls, classifications, hours, fringe calculations, apprenticeship agreements, and good-faith requests, retained for the owner’s full limitations period, because the owner certifies compliance on Form 7220 with its return and the IRS may not look at the project for years. Third, a negotiated indemnity. The owner’s exposure on a $200 million project is the difference between a 6 percent and a 30 percent credit, or $48 million, and an uncapped flow-down of that number to a subcontractor with $3 million in annual revenue is a bankruptcy waiting to happen. A cap tied to the subcontract price, a carve-out for errors promptly cured under the safe harbors, and an owner’s duty to give notice of any IRS inquiry in time to use the 180-day window are reasonable asks, and owners who need experienced New Mexico crews on a 2027 deadline are inclined to grant them.
| Failure | Cure or penalty | Safe harbor |
|---|---|---|
| Wage underpayment | Back pay plus interest at underpayment rate + 6 points; $5,000 per worker to IRS | Penalty waived if corrected by end of month after quarter and error is limited (§ 1.45-7(c)(6)) |
| Intentional wage underpayment | Three times shortfall; $10,000 per worker | Presumption of no intent if corrected before exam notice (§ 1.45-7(c)(3)(v)) |
| Apprentice labor-hour shortfall | $50 per missing hour; $500 if intentional | Good-faith request denied or unanswered in 5 business days (§ 1.45-8) |
| Uncured failure after IRS determination | Loss of the five-times multiplier | Payment within 180 days of final determination (§ 1.45-7(c)(4)) |
Frequently Asked Questions
Who is liable if a subcontractor underpays prevailing wages on an IRA project?
Legally, the owner, whose credit shrinks. Contractually, whoever the indemnity names, usually the contractor and its subcontractors. IRS penalties are assessed on the owner and flowed down by contract.
What interest rate applies to prevailing wage corrections?
The federal underpayment rate under § 6621 plus six percentage points, which in 2026 puts the rate in the low teens.
Do the rules apply to projects owned by pueblos or the Navajo Nation?
Yes. Tribal governments and wholly owned tribal entities claiming elective pay under § 6417 must meet the same prevailing wage and apprenticeship requirements to receive the five-times credit.
What if no registered apprenticeship program exists in the county?
Send a written request to a registered program at least 45 days before the work. A denial, or no response within five business days, satisfies the requirement for 365 days under Treas. Reg. § 1.45-8.
Does New Mexico’s Public Works Minimum Wage Act replace the federal rules?
No. It applies to state and local government projects over $60,000 and uses state-set rates. A project subject to both regimes must pay the higher rate for each classification and keep records for both.
How long should a contractor keep payroll records for an IRA project?
At least as long as the owner’s return remains open, and in practice through the ten-year operation period plus the limitations period, because alteration and repair work during operations is covered too.
How North Star Law Firm Can Help
North Star Law Firm advises New Mexico contractors, developers, and tribal entities on prevailing wage and apprenticeship compliance, subcontract risk allocation, elective pay and transferability, and the IRS examinations that follow a claimed credit. Phillip Zagotti, JD/CPA, represents taxpayers before the IRS and the U.S. Tax Court and brings a CPA’s discipline to the certified payroll, classification, and labor-hour reconciliations that decide whether the five-times credit survives. The firm’s tax law practice covers credit planning and compliance, its audit defense practice handles examinations of claimed credits, and its business structuring practice addresses how project entities and contractors allocate the risk. Contact North Star Law Firm before signing the flow-down, because the indemnity you accept today is the audit you defend in 2030.