IRA Domestic Content Compliance Calculator
Check whether a solar or storage project qualifies for the 10% domestic content bonus credit before you buy equipment.
Project setup & timing
Set the construction year and project scope.
Have a bill of materials? Upload a BOM.
Live Pass/ Fail test for Steel & Iron.
Manufactured Products cost percentage for your construction start year. Every percentage is editable, and nothing is stored.
What to ask suppliers for once you have a number
A domestic content claim is only as good as the paperwork behind it. Request these with your quotes so the score you modelled survives review.
- Steel & iron: MIL test reports showing the melt and pour location for piles, racking, torque tubes and rebar.
- Modules: Country of assembly, cell origin and wafer origin stated separately, plus the factory address.
- Inverters and PCS: Manufacturing location and a direct cost breakdown for the domestic content certification.
- Batteries: Cell manufacturing location, pack assembly location, and whether enclosure and thermal systems are U.S. built.
IRA domestic content FAQs
What is the IRA domestic content bonus credit?
It is an additional 10 percentage points on the investment tax credit (or a 10% increase to the production tax credit) for projects that meet both the Steel & Iron requirement and the Manufactured Products cost percentage for the year construction begins.
What domestic content percentage do I need to hit?
The Manufactured Products threshold rises with the construction start year: 40% for projects beginning construction in 2024 or earlier, 45% in 2025, 50% in 2026, and 55% in 2027 and later.
Why does one foreign steel item fail the whole project?
The Steel & Iron requirement is pass or fail, not a percentage. All structural steel and iron — piles, racking, torque tubes and rebar — must be melted and poured in the United States. A single foreign structural item disqualifies the bonus regardless of your manufactured products score.
Can I change the cost percentages?
Yes. Every line starts at the customary safe-harbour cost allocation and can be edited to match your actual project costs. The score renormalises against whatever cost base you enter.
How is a solar plus storage project scored?
Each scope is scored on its own cost lines, then blended by capacity using ((solar score x MW) + (storage score x MWh x BESS cost factor)) / (MW + MWh).
Is this calculator tax advice?
No. It is a planning estimate for procurement teams. Confirm final eligibility with your tax advisor against the current IRS guidance and your supplier's domestic content certifications before you claim the credit.