Compliance Guide
IRA Prevailing Wage & Apprenticeship
The Inflation Reduction Act ties the full value of most clean-energy tax credits — five times the base rate — to two labor conditions during construction: Davis-Bacon prevailing wages, and registered-apprentice participation. The credit belongs to the project owner; the records that defend it are built by the contractor, hour by hour. Here is how the rule works, who it touches, and where the primary sources live.
The Basics
| Authority | Inflation Reduction Act of 2022, amending credit sections across the Code — see 26 U.S.C. §45(b)(6)–(8) for the production-credit version of the rule; IRS final regulations issued June 2024 |
|---|---|
| The stakes | Meeting PWA multiplies the base credit or deduction five-fold on most covered clean-energy facilities — the difference between, for example, a 6% and a 30% investment credit |
| Prevailing wage | Davis-Bacon rates per the applicable wage determination for construction — and for alteration and repair during the credit's recapture window after placement in service |
| Apprenticeship | Three tests: a labor-hours percentage of total construction hours worked by registered apprentices (15% for facilities beginning construction in 2024 or later), the program's apprentice-to-journeyworker ratio, and a participation rule for employers with four or more workers |
| Who claims, who proves | The taxpayer (owner/developer) claims the increased credit; the substantiating records — payrolls, hour logs, ratios — come from the contractors and subcontractors |
| Safety valves | Good-faith-effort exception for apprenticeship when qualified requests go unfilled; correction-and-penalty ("cure") payments can rescue wage failures — at a price that rises when failures are intentional |
| Where the rules live | IRS PWA requirements hub and the DOL's IRA page |
How a PWA Job Actually Runs
The owner decides to pursue the multiplier
Before construction, the credit claimant determines PWA applies (most facilities over 1 MW that began construction after January 28, 2023) and writes the obligations into every construction contract — because after the fact is too late to build the record.
Wages run on Davis-Bacon rates from day one
Contractors pay at least the applicable determination's rate and fringe for each classification — the same discipline as directly covered federal work (see our Davis-Bacon guide), enforced here through the tax code rather than a contracting officer.
Apprentice hours are tracked against the percentage
Total construction labor hours are logged, and registered-apprentice hours must reach the applicable percentage — 15% for construction beginning in 2024+ — while each apprentice works within their registered program's ratio. Hour tracking that starts mid-job reconstructs; hour tracking that starts day one substantiates.
Requests and refusals are documented
The good-faith-effort exception exists for employers who request apprentices from a registered program and are denied or unanswered within five business days — but only the documented request earns the exception.
Failures get cured, on the record
Wage shortfalls can be corrected with back pay plus interest and a per-worker penalty to the IRS; the price triples for intentional disregard. The cure math only works when the underlying records exist.
The closeout package defends the credit
At the end, the owner holds a records package — payrolls at prevailing rates, apprentice hour logs against the percentage, ratio documentation, cure records if any — sufficient for IRS substantiation. That package is what the contractor was really hired to build alongside the facility.
Where You Fit
Owners, developers & investors
You hold the credit and the risk: a failed PWA record doesn't reduce your contractor's price, it reduces your credit by 80%. Contract for the records, audit them quarterly, and treat cure events as claims to manage.
- Start at the IRS PWA hub and Publication 5855
- Tax-equity and transfer counterparties will diligence the package — build it to be shown
Workers & would-be apprentices
PWA is pulling registered apprenticeship into utility-scale construction at speed — the 15% hour requirement is a standing demand signal for apprentices in the fiber, electrical, and civil trades.
- Find programs at apprenticeship.gov's finder
- On covered work you're owed the determination rate for your classification, apprentices per their program schedule
GCs & subcontractors
PWA flows to you by contract. The bid that wins prices the wage floor correctly; the relationship that lasts delivers hour logs the owner's tax team can actually use.
- DOL's IRA page collects the wage-side guidance
- Ratio math is program-specific — know your program standards before staffing
What Nevantin Runs
On PWA-covered work, Nevantin pays Davis-Bacon rates per the applicable determination and logs total and apprentice labor hours from the first day — the same weekly-payroll discipline we run on directly covered federal jobs, aimed at the owner's substantiation instead of a contracting officer. Apprentice hours run through registered programs within their ratios; our own registered-apprenticeship program enrollment is in progress, and until it closes, apprentices work through partner programs with the good-faith-effort provisions where they apply — stated plainly, because the distinction matters to your record.
At closeout the owner receives the package their credit rests on: payrolls, wage determinations applied, hour logs against the percentage, and ratio documentation.
Primary Sources
IRS — the credit side
- IRS PWA requirements hub — the program landing page
- IRS Publication 5855 — the official plain-language overview
- IRS PWA FAQs — the running interpretation questions
- 26 U.S.C. §45 — the statutory text of the rule
DOL — the labor side
- DOL WHD — Inflation Reduction Act — wage guidance for PWA
- SAM.gov Wage Determinations — the rates themselves
- Apprenticeship.gov — registered programs, standards, ratios
- Apprenticeship job finder — for people entering the trades
Adjacent guides
- Our Davis-Bacon guide — the wage machinery PWA borrows
- Our BEAD guide — the broadband program with its own labor stack
- Nevantin renewables construction — the work PWA most often covers
Protecting a 5x credit?
The record that defends it starts on the first day of construction. Start there with us.