How to Register a Solar Project With the IRS
Pre-filing registration is the step that makes a direct pay claim work, and the IRS opened the portal for it on December 22, 2023. You register each facility, receive a registration number, and put that number on Form 3800, Part III, as well as on the source credit form. Skip it, or leave the number off the return, and the election is ineffective no matter how good the project is.
Registration takes weeks, not an afternoon. It asks for coordinates, ownership documents, permits, dates, and banking details, and much of that lives with your contractor or your facilities office rather than your finance office.
When can a nonprofit register?
Three timing rules apply at once.
- You can’t register before the beginning of the tax year in which you earn the credit.
- The property has to be placed in service before you submit the registration package.
- The IRS recommends submitting at least 120 days before the return is due, including extensions.
Work that backwards for a system energized in December of a calendar year. The return making the election is generally due the 15th day of the fifth month after year end, which is May 15 for a calendar-year organization. The 120 day recommendation puts your registration in mid-January, weeks after the system turns on and while closeout documentation is still moving.
What the registration asks for
The requirements sit in the Section 6417 regulations, and the portal asks for more on top. At the entity level: name, address, taxpayer identification number, entity type, the tax year, what return you normally file (or that you file none), and which credits you’re claiming. A contact person has to either have authority to bind the organization or file a Form 2848 power of attorney, and the submission carries a penalties of perjury statement.
Then, for each property:
| Item | Where it usually comes from |
|---|---|
| Type of credit property | Your EPC contract or proposal |
| Physical location, address plus longitude and latitude | Site plan or a geocode of the array, not the mailing address |
| Supporting documentation | Permits to operate, certifications, and evidence of ownership tied to a deed or lease |
| Beginning of construction date and placed in service date | Contractor records, notice to proceed, permission to operate |
| Source of funds used to acquire the property | Your grant agreements and financing documents |
The source of funds field isn’t idle curiosity. If a grant or forgivable loan was awarded for the specific purpose of buying the system, and that funding plus the credit would exceed what the system cost, the credit is reduced so the two together equal the cost.
The registration number, and what it does not do
Each property gets its own number. A number is valid only for the entity that obtained it and only for the tax year it was obtained for, so a production credit claimed over several years needs the registration renewed each year. Changes in ownership call for an amended registration by the original owner and a new one by the buyer.
Receiving a number doesn’t mean the IRS agrees you’re eligible. The regulations say so directly. It means you may now make the election, and that the return will process. Eligibility is still tested on the return and on examination.
What you can’t undo once you submit
OneDocuments are one-way
Supporting documents included in a registration submitted for review can't be removed later. A property is different: once the IRS returns a submission you can amend it to drop a property that was submitted but not approved.
TwoReview locks the file
A registration can't be changed while it's under IRS review, only after it comes back.
ThreeThe election lives on the original return
The election has to be on an original return filed by the due date including extensions, though a superseding return filed by that same date can still revise it. It can't be made for the first time on an amended return, withdrawn on one, or made or withdrawn by an administrative adjustment request.
What to gather before you open the portal
Treat this as a document collection project across finance, facilities, and legal, and start it before the system is energized rather than after:
- The deed or lease showing your organization’s right to the site.
- The permits to operate and any inspection certifications.
- A geocode of the array location, with its source noted.
- Contractor records establishing the construction start date.
- Every grant agreement or loan document connected to the project, with award dates.
- The bank account details the IRS will pay into, matching the organization’s name and EIN.
- The name of the person who can sign under penalties of perjury for the organization.
Updated September 2026. The portal is now reached through a Clean Energy Account on IRS Energy Credits Online, and the IRS maintains a user guide, Publication 5884, revised July 2026, that walks the screens field by field. The rules above still hold. An organization filing Form 990-T only to make the election, with no unrelated business income, completes a short path through the form. On extensions, file the Form 8868. The automatic paperless six-month extension in the regulations belongs only to entities with no filing requirement at all, the regulation makes it contingent on future guidance, and the Form 990-T instructions say all entities filing Form 990-T must use Form 8868 to request an extension. The election is only good on a return filed by the due date including extensions, so this isn't the place to save a form. One thing that has changed since this was written sits outside the registration rules: for wind and solar facilities that began construction after July 4, 2026, Section 48E is unavailable for property placed in service after December 31, 2027. Confirm the project still earns a credit before spending the time to register it.
Who should own the registration
Pick the person who will hold the registration, give them access early, and get the ownership and permit documents into one folder before the system is turned on. The portal work is short. Finding the documents is not.
First filing coming up? GreenFile Advisory runs the registration and the return for tax-exempt owners. Tell us your placed in service date and we'll work the calendar backward with you.
Have a project and a deadline?
GreenFile Advisory handles the filing side of Section 6417 direct pay: eligibility confirmation, IRS pre-filing registration, and the Form 990-T with the elective pay election. Filing and compliance only, so we are not competing with your installer or your financing.
This article is general information, not tax advice, and it reflects IRS guidance as of December 28, 2023. Deadlines and eligibility depend on your organization's tax year and entity type. Please confirm your own facts with a qualified tax professional before relying on anything here.