Form 709: The Federal Gift Tax Return, Explained

By Eric Ridley, attorney, Ridley Law. Updated October 2026.

Who this page is for: every estate size. Below $15 million for one person or $30 million for a couple, the return keeps the exemption count accurate and starts the clock on what you gave. From $15 million up, and above $100 million especially, it carries appraisals, GST allocations and split-gift elections that decide what the IRS can still challenge years later.

The gift tax in 2026 page explains the annual exclusion and what you can give without a return. This page picks up where that one stops: who has to file Form 709, what goes in it, how the elections work, and what happens when a return is late, missing or too thin to count.

If you made gifts in 2025 and extended your return, the extended due date is October 15, 2026.

Who has to file Form 709?

Any U.S. citizen or resident who made a gift beyond what the annual exclusion, the tuition and medical exclusions, and the marital and charitable deductions cover must file, under 26 U.S.C. § 6019 and the IRS Instructions for Form 709 (2025).

In practice, you file for a year in which any of these happened:

• You gave one person, other than your spouse, more than the annual exclusion: $19,000 for 2026 (Rev. Proc. 2025-32).
• You gave a future interest, which doesn’t qualify for the annual exclusion at all. Most gifts to a trust are future interests unless a beneficiary has a present right to the property.
• You and your spouse want to split gifts. That takes a return whatever the amount.
• You gave community property or property held as joint tenants. Each spouse is a donor of half, and each must file if their half requires it.
• You gave your spouse a terminable interest that needs a QTIP election, or gave a spouse who isn’t a U.S. citizen more than $194,000 in 2026.
• You want to allocate GST exemption, opt out of automatic allocation, or spread a 529 contribution over five years.

Only individuals file. If a trust, partnership or corporation makes a gift, the individual beneficiaries, partners or shareholders are treated as the donors. Spouses can’t file a joint gift tax return. Each files their own. Payments made directly to a school for tuition or to a medical provider aren’t gifts at all and don’t go on the return (26 U.S.C. § 2503(e)).

When is Form 709 due, and how do I extend it?

Form 709 is due April 15 of the year after the gift, and an extension of your income tax return extends it automatically, under 26 U.S.C. § 6075(b).

There are two ways to extend. An extension of your calendar-year income tax return, usually Form 4868, also extends the gift tax return (§ 6075(b)(2)). If you aren’t extending your income tax return, Form 8892 gives an automatic six-month extension of the 709 alone. Neither one extends the time to pay any gift or GST tax. If the donor dies during the year, the 709 is due no later than the estate tax return, including extensions (§ 6075(b)(3)).

Form 709 can be filed electronically through the IRS Modernized e-File system, and a balance due can be paid by electronic withdrawal at the same time. Paper returns go to the Kansas City service center. A corrected or supplemental return is a new 709 with the amended box checked, a statement of what changed, and a copy of the original.

Splitting gifts with your spouse

Under 26 U.S.C. § 2513, a married couple can treat a gift by either spouse to a third person as made half by each. It doubles the annual exclusion per recipient to $38,000 for 2026 and lets one spouse’s gift draw on both exemptions. The rules are stricter than most people expect:

• All or nothing for the year. The consent covers every gift either spouse made to third parties during the calendar year while married.
• Both spouses must be U.S. citizens or residents at the time of the gift, and the spouse can’t have been given a general power of appointment over the property.
• The third party’s share has to be ascertainable. If you give property partly to your spouse and partly to others, you can split only if the interest passing to the others can be valued at the time of the gift. A gift to a trust where your spouse is also a beneficiary often fails that test.
• Liability becomes joint and several for the entire gift tax of each spouse for that year.
• The consent has a hard deadline. It can’t be given after April 15 following the year of the gift, unless neither spouse has filed by then, in which case it must be on the first return either spouse files. It can’t be given after a notice of deficiency is sent to either spouse (§ 2513(b)(2)).

The 2025 instructions changed how consent is shown. The consenting spouse no longer signs the donor’s return. Instead the donor checks the consent box and attaches a Notice of Consent, signed and dated by the consenting spouse, stating that they elect to treat all gifts to third parties as made one-half by each spouse. Usually both spouses then file their own returns. Only the donor spouse files if, for example, only one spouse made gifts, none to any one person exceeded $38,000, and all were present interests.

The split-gift consent deadline is set by the statute itself. The regulations that let the IRS grant extra time on request cover elections whose deadlines are set by regulation (Treas. Reg. § 301.9100-3(a)), and the automatic six-month extension for statutory elections doesn’t apply to an election that must be made by a return’s unextended due date (§ 301.9100-2(b)). Plan as if a missed consent can’t be fixed.

What to attach to Form 709

The instructions require you to show how each value was determined. For gifts of closely held business interests and anything else without a market price, attachments carry the return:

• Closely held stock: balance sheets, especially the one nearest the date of the gift, and five years of earnings, operating results and dividends, or a qualified appraisal instead.
• Valuation discounts: if any value reflects a discount for lack of marketability, minority interest, fractional interest or blockage, answer yes at the top of Schedule A and attach an explanation of the basis and the amount of each discount.
• Gifts in trust: a certified or verified copy of the trust instrument with the return reporting the first transfer to that trust, and the trust’s employer identification number.
• Life insurance: Form 712 for each policy.
• Real estate and other appraised property: the appraisal.
• A deceased spouse’s unused exclusion: the first four pages of the Form 706 that elected portability.

What is adequate disclosure, and why does it start the clock?

Adequate disclosure is reporting a gift in enough detail to tell the IRS what was given and how it was valued, and under 26 U.S.C. § 6501(c)(9) it is what starts the three-year period the IRS has to assess gift tax on that gift.

The general rule gives the IRS three years after a return is filed to assess tax (26 U.S.C. § 6501(a)). For a gift required to be shown on a 709 and not shown, the tax may be assessed “at any time,” unless the gift was disclosed in a manner adequate to apprise the IRS of its nature (§ 6501(c)(9)). The regulations spell out what that means. A gift is adequately disclosed if the return or an attached statement gives (Treas. Reg. § 301.6501(c)-1(f)(2)):

1. A description of the property and any consideration you received.
2. The identity of, and relationship between, you and each recipient.
3. For a gift in trust, the trust’s tax identification number and a brief description of its terms, or a copy of the trust.
4. A detailed description of the valuation method, including the financial data used, any restrictions considered and every discount claimed, or a qualified appraisal instead.
5. A statement describing any position contrary to a Treasury regulation or revenue ruling.

Once the period runs on an adequately disclosed gift, the value is locked. The IRS can’t revalue the gift to compute tax on later gifts (26 U.S.C. § 2504(c)) or the estate tax at death (§ 2001(f)). So file for a hard-to-value gift even when no return is required. The regulations give the example of a $9,000 gift of closely held stock covered by the annual exclusion: because it was adequately disclosed, the assessment period runs even though, if the value was right, no return was required.

A transfer you report entirely as not a gift, such as a sale to a family trust, starts the clock if the 709 or attached statement gives most of the same information plus an explanation of why it isn’t a gift (§ 301.6501(c)-1(f)(4)). And a transfer reported and adequately disclosed as a completed gift starts the clock even if it later turns out to have been incomplete (§ 301.6501(c)-1(f)(5)). For split gifts, the donor spouse’s adequate disclosure covers the consenting spouse’s half (§ 301.6501(c)-1(f)(6)).

Qualified appraisals for hard-to-value gifts

A qualified appraisal can stand in for the detailed valuation description. It must be prepared by someone who holds himself or herself out to the public as an appraiser or regularly performs appraisals, who is qualified for that type of property, and who isn’t the donor, the recipient, a family member of either, or an employee of any of them (Treas. Reg. § 301.6501(c)-1(f)(3)).

The appraisal itself must state the date of the gift, the date of valuation and the purpose; describe the property and the process; list the assumptions and limiting conditions; include the financial data in enough detail that another person could replicate the value; and explain the method, the reasoning and the specific comparables or approach used. For a business interest held through layers of entities, the data has to reach every layer that matters to the value. The regulations’ own example of a limited partnership interest that owned stock in a company that owned a partnership interest in real estate fails disclosure for skipping the lower tiers, and passes when a qualified appraisal is attached.

Undervaluing carries penalties. A substantial valuation understatement is a reported value of 65 percent or less of the correct value, and a gross valuation understatement is 40 percent or less (IRS Instructions for Form 709). The accuracy-related penalty is 20 percent of the underpayment, rising to 40 percent for a gross valuation misstatement (26 U.S.C. § 6662(a), (h)).

GST allocation and elections

The 709 is also where you use your generation-skipping transfer exemption, $15,000,000 per person for 2026 (Rev. Proc. 2025-32). A timely return locks in the gift-date value for the allocation, and a late one doesn’t.

• Direct skips, such as an outright gift to a grandchild, get an automatic allocation of unused exemption unless you elect out on the return (26 U.S.C. § 2632(b)).
• Indirect skips to a “GST trust” also get automatic allocation (§ 2632(c)). The return offers three elections: opt out for the current transfer, opt out for this and all future transfers to a trust, or treat a trust as a GST trust so allocation applies (§ 2632(c)(5)). The first is timely only on a timely filed return for the year of the transfer.
• Value follows timing. Exemption allocated on a timely return is measured against the gift’s value as finally determined for gift tax. An allocation made late is measured against the property’s value when the allocation is filed (26 U.S.C. § 2642(b)(1), (b)(3)). For a trust holding growth assets, a late allocation can cost far more exemption.
• A Notice of Allocation attached to the 709 allocates exemption to transfers not otherwise reported, such as a late allocation. It identifies the trust and its EIN, the year the transfer was reported if late, the trust’s value at the effective date, the amount allocated or a formula such as “an amount necessary to produce an inclusion ratio of zero,” and the resulting inclusion ratio.

Allocations are irrevocable. If one was missed, the regulations under § 2642(g) allow an extension of time to allocate or to make a § 2632 election for requests filed on or after May 6, 2024. There is an automatic six-month extension from the return’s original due date to file a supplemental return; beyond that, relief goes through the private letter ruling program and requires showing you acted reasonably and in good faith and that relief won’t prejudice the government (Treas. Reg. § 26.2642-7). Hindsight is deemed prejudice.

What happens when a 709 is skipped, late or skimpy?

When no tax is due, the late-filing penalty is usually zero, because it is figured as 5 percent of the tax required to be shown for each month late, up to 25 percent (26 U.S.C. § 6651(a)(1)). The real costs are elsewhere:

• The statute never starts. An unreported or inadequately disclosed gift can be assessed at any time (§ 6501(c)(9)), and its value can be reopened at death when the estate tax return adds up prior gifts.
• Late GST allocations cost more exemption, because the property is valued when the allocation is filed (§ 2642(b)(3)).
• Elections are lost or put at risk. The split-gift consent has a statutory deadline. The elections out of automatic GST allocation are made on a timely filed return. The 529 five-year election must be made for the calendar year of the contribution.
• Relying on a professional doesn’t excuse lateness. In United States v. Boyle, 469 U.S. 241 (1985), an executor’s attorney missed the estate tax return deadline by three months because of a calendar error, and the Supreme Court held the executor’s reliance on the attorney wasn’t reasonable cause for the late-filing penalty.

If a return was missed, file it now, with full disclosure and an appraisal for anything without a market price. A late return still starts the three-year period for the gifts it adequately discloses, because the period runs from when the return was filed, whether or not it was filed on time (§ 6501(a)).

Worked example: a California couple’s gift to a family trust

Hypothetical. A married couple in California hold LLC interests as community property. In 2026 they give nonvoting interests, appraised at $6,000,000 after discounts by an independent appraiser, to an irrevocable trust for their children and grandchildren.

• Who is the donor. Because the interests are community property, each spouse is treated as giving half, $3,000,000, and each files a 709. No split-gift election is needed to get there.
• Annual exclusion. None. A gift to a trust like this is a future interest unless beneficiaries have present withdrawal rights.
• Exemption. Each spouse reports a $3,000,000 taxable gift. No tax is due. Each has $12,000,000 of the $15,000,000 basic exclusion left for 2026.
• GST. The trust can benefit grandchildren, so each spouse allocates $3,000,000 of GST exemption on the timely return, for an inclusion ratio of zero.
• Attachments. The appraisal, the LLC’s financial statements, an explanation of each discount, the trust instrument and its EIN.
• Due date. April 15, 2027, or October 15, 2027 with an extension.

Now suppose the same couple had already used both exemptions with earlier gifts. If the IRS later succeeds in raising the value of this gift, every added dollar is taxed at 40 percent. With adequate disclosure and three years gone, the added tax is zero.

Cases won and lost

What changes in California

• No California gift tax. Proposition 6, adopted in June 1982, repealed California’s inheritance and gift taxes, according to the Department of Finance. There’s no state gift tax return.
• Community property gifts are half from each spouse. For federal purposes a gift of community property is treated as made one-half by each spouse, and each spouse must file if their half requires it (IRS Instructions for Form 709). This treatment is automatic and separate from the § 2513 split-gift election, which applies to one spouse’s gift of their own property.
• A spouse needs written consent to give away community personal property. Under Fam. Code § 1100(b), one spouse can’t make a gift of community personal property without the other’s written consent, except gifts both spouses make together. Get that consent in writing on the gift documents themselves.
• Changing property between spouses takes a writing. A transmutation between spouses is valid only if made in writing by an express declaration consented to by the affected spouse (Fam. Code § 852(a)). Converting community property to one spouse’s separate property before a gift needs that writing.
• Gifting gives up the step-up. A gift generally carries your basis to the recipient (26 U.S.C. § 1015(a)), while property held until death takes a basis at its date-of-death value, and for community property the surviving spouse’s half does too (26 U.S.C. § 1014(a), (b)(6)). See community property step-up.
• Real property gifts can trigger reassessment. A gift of California real estate or of interests in an entity that owns it raises property tax questions the 709 never asks. See deeding a house to your children and Prop 19 planning.

What works and what fails

The skimpy 709 is one of the planning traps on estate planning strategies that backfire. The 709 is also where the gifts behind a SLAT, a generation-skipping trust or a family limited partnership are reported.

Who this is for

Families making gifts of business interests, real estate or other assets without a market price, couples using split gifts or community property, and anyone funding a trust meant to last for grandchildren. It’s also for executors who find gifts that were never reported. I prepare the gift documents and work with your CPA or return preparer on the 709 and its attachments.

Working with Ridley Law

I work alongside your CPA and, where the matter calls for it, co-counsel. Work at this level is built for each family and quoted in writing before any drafting starts.

The first call is free and runs 30 minutes, by phone or Zoom. Book my 30-minute call or call 805-244-5291.

Frequently asked questions

Do I have to file Form 709 if no gift tax is due?

Yes, if you gave one person more than $19,000 in 2026, gave a future interest, or want to split gifts. Most returns show no tax because the $15 million exemption absorbs the gift, but the filing requirement doesn’t depend on owing tax.

Can my spouse and I file one gift tax return?

No. There is no joint gift tax return. Each spouse files their own, and a split-gift election is shown with a Notice of Consent signed by the consenting spouse.

How long does the IRS have to audit a gift?

Three years after the return is filed, but only for gifts adequately disclosed on it (26 U.S.C. § 6501(a), (c)(9)). An unreported or inadequately disclosed gift can be assessed at any time.

Is there a penalty for filing Form 709 late if I owe nothing?

The late-filing penalty is a percentage of the tax required to be shown, so with no tax due it is usually zero (26 U.S.C. § 6651(a)(1)). The bigger costs are an unstarted statute of limitations, lost elections and GST exemption measured at a later, higher value.

Does California have a gift tax?

No. California repealed its gift tax in 1982. Federal Form 709 is the only gift tax return a California resident files.

Can Form 709 be filed electronically?

Yes. The IRS accepts Form 709 through its Modernized e-File system, including returns with a balance due paid by electronic withdrawal.

I never filed a 709 for a gift years ago. What now?

File the late return for that year, with full disclosure and a retrospective appraisal if the property had no market price. The three-year period starts when it is filed. If a GST allocation was missed, ask whether relief under Treas. Reg. § 26.2642-7 is available before allocating late.