Protecting Production Credit Value Doesn't End When Construction Does

Yes. Prevailing Wage applies to qualifying A&R work performed after a facility is placed in service. Apprenticeship does not. Both apply during construction.

A&R work is work that alters or repairs the facility. Routine maintenance is excluded, and the regulations treat that line as a facts-and-circumstances determination, which means the classification decision sits with the project and must be documented when the work is scoped.

Section 45Z draws a further line based on when a facility entered service. A facility placed in service after December 31, 2024 must satisfy the PWA requirements for construction, alteration, or repair. A facility placed in service before January 1, 2025 must satisfy the Prevailing Wage requirements for alteration or repair performed after December 31, 2024. That second rule covers most operating ethanol and RNG facilities in the United States. For those producers, A&R is not a secondary consideration behind construction compliance. It is the compliance obligation.

The statute provides a cure. A taxpayer that underpaid can correct the underpayment, including after the return has been filed, and remain eligible for the increased credit amount. Correction requires paying the affected laborers and mechanics the difference owed, plus interest at the underpayment rate under Section 6621 substituting six percentage points for three, and paying a penalty to the IRS of $5,000 for each laborer or mechanic paid below the prevailing wage rate during the year.

The regulations also waive that penalty. A taxpayer that makes the correction payments by the last day of the first month following the end of the calendar quarter in which the failure occurred pays no penalty at all, provided the failure occurred in less than 10 percent of the calendar year's pay periods or the total underpayment was within 5 percent of the amount required. A separate waiver applies to work performed under a qualifying project labor agreement.

Missing that window costs more in both directions. The penalty applies for each calendar year in which a worker was underpaid, so a misclassification that repeats across years multiplies. Where the IRS determines a failure is due to intentional disregard of the requirements, the correction payment triples and the penalty rises to $10,000 per worker. The regulations presume against intentional disregard when a taxpayer makes the correction and penalty payments before receiving notice of an examination, which means self-identification is itself a defense.

Every one of those outcomes depends on records. Correcting an underpayment requires showing which workers performed which classifications of work, at what rates, on what dates. A project without those records cannot establish the shortfall, cannot calculate what is owed, and cannot document the remedy.

Without records, the cure is out of reach. With them, a failure is a bill. That is what makes contemporaneous recordkeeping an economic decision rather than a matter of good practice.

Consider an ethanol facility placed in service in 2014 whose in-house maintenance crew rebuilds a dryer across two pay periods in May. The work is alteration and repair performed after December 31, 2024, so Prevailing Wage applies to it. Six millwrights are paid their standard plant rate, which sits below the applicable prevailing wage for that classification.

On a quarterly payroll review, the facility finds the shortfall in July and pays the six workers the difference with interest before July 31. The failure covered two of the year's 26 pay periods, under the 10 percent threshold, and the correction lands inside the quarterly window. The penalty is waived. Total cost is the wages that should have been paid, plus interest.

Without that review, the facility learns about it two years later, when a credit buyer asks for the compliance file. Correction is still available, and it now runs $30,000 in penalty payments, $5,000 for each of the six workers, on top of back wages and interest. If the pattern reads as intentional disregard, the correction payment triples and the penalty doubles to $60,000. The facility also has to reconstruct which of the six performed which classification of work, on what dates, at what rates, from records a two-year-old payroll file may not contain.

The difference between those outcomes is not the underpayment. It is when the underpayment was found. The regulations require taxpayers to maintain records sufficient to establish compliance with the applicable Prevailing Wage requirements, and building that process before recurring operational work begins is what allows a project to find its own exposure inside the window rather than reconstruct the file after diligence opens it.

Both sides, in different directions. A taxpayer transferring a production credit under Section 6418 must provide the buyer minimum documentation, which includes substantiation that the requirements for any increased credit amount in the transferred credit were satisfied. A transfer election is made separately for each taxable year of the credit period, 10 years for most production credits and 12 years for 45Q. The labor compliance record is therefore a deliverable in every year the credit is sold, not a one-time diligence exercise at first close.

Liability splits in a way that puts the burden on the seller. The taxpayer that sells the credit remains liable for the Prevailing Wage penalty payments on any failure. The buyer generally carries the exposure if the credit is later adjusted on examination. A seller is effectively required to fund whatever correction and penalty preserve the buyer's full credit amount, and transfer agreements need language that makes that obligation explicit. A seller that cannot produce the classification and payroll records cannot fund a cure, which converts a documentation gap into a commercial dispute.

Each of these determines whether the increased credit amount is supported for the years it is claimed.

1. 1Determine which credit the project will earn, 45Q or 45Z.
2. 2Determine which labor requirements attach to that credit and that facility, starting with the placed-in-service date, before or after January 1, 2025.
3. 3Define who evaluates post-placed-in-service work, and classifies it, before a contract is executed.
4. 4Build Prevailing Wage obligations and record-delivery requirements into contractor agreements, and onboard contractors against them.
5. 5Create a process for reviewing payroll and resolving exceptions during the work, while correction remains straightforward.
6. 6Maintain one organized compliance record through the life of the credit.
7. 7Build the compliance package each transfer requires. A transfer election is made for each taxable year of the credit period, and the seller must give the buyer documentation substantiating any increased credit amount included in the transferred credit.