Title 26 › Subtitle B — Estate and Gift Taxes › CHAPTER 13 — TAX ON GENERATION-SKIPPING TRANSFERS › Subchapter D — GST Exemption › § 2632
You can use your generation-skipping transfer (GST) tax exemption any time up to the due date for your estate tax return (including extensions), even if you don’t have to file that return. The Treasury will say how to make the allocation by forms or rules. If you give property during your life directly to a skip person, any unused GST exemption is automatically applied to that gift as needed to make its GST tax inclusion ratio zero, up to the amount you have left. You can choose not to have this automatic rule apply. The same automatic rule applies to certain lifetime transfers to a trust that could cause GST tax (called an “indirect skip” to a “GST trust”); the law gives short, simple meanings for those terms (indirect skip = a transfer to a trust subject to the GST rules; GST trust = a trust that might trigger generation-skipping tax unless it has specific protections or is a special charitable or estate-including trust). Some transfers are treated as made only at the end of an “estate tax inclusion period,” and values are measured then. You may elect on your gift tax return to opt out of these automatic allocations or to treat a trust as a GST trust, and the law sets when those elections must be filed. If a certain descendant who is assigned to a generation below you (a lineal descendant of a grandparent of you or your spouse) had a future interest in a trust and dies before you, you may be able to allocate unused GST exemption back to earlier transfers to that trust. If you file the allocation on a timely gift tax return, those earlier transfers are treated as if the exemption had been allocated when the transfers were made, and the allocation takes effect just before the descendant’s death. Any unused exemption left after the filing deadline is treated as allocated first to direct skips at your death, then to trusts you made that could have taxable distributions or terminations, with the split done in proportion to each item’s nonexempt value (value times its inclusion ratio).
Full Legal Text
Internal Revenue Code, Source: USLM XML via OLRC
Legislative History
Reference
Citation
26 U.S.C. § 2632
Title 26, Internal Revenue Code
Last Updated
Sep 22, 2026
Release point: 119-110