Buy Tax Credits Before Year-End 2026: What Has to Happen and When

Published October 28, 2026. If you want a purchased credit to count for your 2026 tax year, a few dates matter more than December 31. This is a plain-language timeline, not a promise that any deal can close in time.

First, who can use a purchased credit?

• C corporations use it against regular federal tax, within the §38(c) limit.
• Individuals are subject to the passive activity rules, so the credit generally offsets only tax on passive income. Wages and stock gains usually cannot be sheltered this way.

The dates that actually matter

Date	Why it matters
Now to mid-November	Forecast 2026 tax and capacity; engage your CPA and counsel; request seller diligence.
December 15, 2026	Fourth estimated tax installment for calendar-year C corporations (§6655). See the December 15 payment.
December 31, 2026	Not a statutory deadline for buying a credit. It is the end of a calendar-year buyer's tax year, so it matters for some plans and for your own books.
January 15, 2027	Fourth installment for calendar-year individuals (§6654).
Earlier of two return filings	The payment window closes at the earlier of the seller's filing of its return for the credit year or the buyer's filing of its return for the year the credit is taken into account (Treas. Reg. §1.6418-2(b)(5)(iii)).

See 2026 tax credit transfer deadlines for the election and return dates.

The payment window is the hidden deadline

Consideration must be paid in cash (§6418(b)(1)). Under Treas. Reg. §1.6418-1(f), a payment is "paid in cash" only if it is made after the first day of the seller's taxable year in which the credit is determined and by the due date for completing the transfer election statement. That statement cannot be completed after the earlier of the seller's or the buyer's return filing. So if the seller files early, your window can close early. Ask the seller's expected filing date before you sign.

A year-end checklist

1. Estimate 2026 federal tax and your capacity.
2. Confirm the credit is an eligible credit and that the seller has a registration number.
3. Review the transfer agreement (see the agreement checklist).
4. Confirm the seller's filing timeline and the payment mechanics.
5. Decide whether to reflect the credit in the December estimate with your CPA.
6. Plan the Form 3800 and transfer election statement attachments.

Pricing is market-driven and varies by project and structure; read pricing explained. We do not publish prices on this page.

Educational information only, not tax, legal or investment advice, and no outcome is promised. Figures were checked against the cited sources on October 28, 2026; confirm with your CPA before acting.