Gift Tax Return Instructions: Form 709, Splitting, and Deadlines

To file Form 709, the federal gift tax return, you report each gift over the annual exclusion on Schedule A at fair market value, subtract available exclusions and deductions, run the tax computation against your lifetime exemption, and submit the return by April 15 of the year after the gift. For gifts made in 2026, the annual exclusion is $19,000 per recipient and the lifetime exemption is $15 million.¹ Most filers owe nothing. The return still matters because it tracks how much of your lifetime exemption you have used and starts the clock on the IRS’s ability to challenge your valuations.

Do You Actually Need to File

You must file for any calendar year in which you gave more than $19,000 to a single recipient.¹ The limit is per recipient, so you can give $19,000 to any number of different people without filing. Two other situations force a filing regardless of the amount: any gift of a future interest (property the recipient cannot use or enjoy right away), and any year in which you and your spouse elect to split gifts.²

Some transfers are not gifts at all and do not go on the form. Tuition paid directly to a school and medical bills paid directly to a provider are fully exempt with no dollar cap.³ “Directly” is the operative word. Reimbursing your grandchild for a tuition bill they already paid is an ordinary gift subject to the $19,000 limit, and the education carve-out covers tuition only, not room and board or books.⁴

Gifts to a U.S. citizen spouse qualify for the unlimited marital deduction and never require a filing. If your spouse is not a U.S. citizen, the annual exclusion for gifts to them is $194,000 in 2026, and anything above that must be reported.¹

Gather Your Information Before You Start

Pull together the full name, address, and Social Security number of every person who received a reportable gift. Your own identifying information needs to match IRS records exactly, since mismatches cause delays and notices.

Each gift needs a detailed description. For publicly traded stock, that means the number of shares, whether they are common or preferred, the exchange, and the CUSIP number.⁵ For real estate, you need the full legal description and the deed recording date.

Every gift is reported at fair market value as of the gift date. For publicly traded stock, that is the average of the high and low trading prices that day. For anything that does not trade on an exchange, such as a stake in a family business or a piece of real estate, the IRS wants either a qualified appraisal or a thorough written explanation of the valuation method.⁵ Do not treat the appraisal as optional on a closely held business interest. Skipping it is a fast way to invite an audit and an accuracy penalty.

Keep receipts and canceled checks that back up any exclusion you claim, especially proof that tuition or medical payments went straight to the institution.

Filling Out Schedule A and Computing the Tax

Schedule A is where you list every reportable gift, the recipient, and the fair market value. The schedule has three parts. Part 1 is for gifts subject only to the gift tax. Part 2 is for gifts to skip persons (like grandchildren) that also trigger the generation-skipping transfer tax. Part 3 is for gifts to trusts that could be hit with the GST tax later.³

Once everything is listed, subtract the $19,000 annual exclusion for each recipient who received a present-interest gift, then subtract any marital or charitable deduction. What remains is your taxable gifts for the year, which flows into Part 2 of the return for the tax computation.⁶

Part 2 adds the current year’s taxable gifts to the cumulative total from every prior year you filed and applies the unified rate schedule, which tops out at 40%.⁷ Then you subtract the unified credit, which for 2026 corresponds to the $15 million lifetime exemption.¹ Most people never exhaust this credit and owe no gift tax at all. The return still records how much exemption you have used, which sets what your estate can shelter later.

Electing to Split Gifts With Your Spouse

Married couples can elect to treat every gift made by either spouse during the year as if each spouse made half. That doubles the annual exclusion to $38,000 per recipient in 2026 and lets both spouses’ lifetime exemptions absorb any excess.⁸ The election is all-or-nothing for the calendar year; you cannot split some gifts and not others.

Both spouses have to consent by each signing a Form 709. If only one spouse made gifts, the other still files a return to formalize the consent. The election requires both spouses to be U.S. citizens or residents at the time of the gift and to remain married through the end of the year (or through the date of death, if one spouse died).

Allocating the GST Exemption

The generation-skipping transfer tax is a separate 40% tax on transfers to someone two or more generations below you, or to a trust that benefits such a person. Your GST exemption equals the basic exclusion amount, $15 million for 2026.¹ You track cumulative usage in Part 2 of Schedule C.⁶ Allocating enough exemption to a transfer brings its “inclusion ratio” to zero, meaning the property and its future growth are permanently shielded from the GST tax.

Transfers to trusts that qualify as indirect skips get an automatic allocation of your unused GST exemption unless you affirmatively opt out.⁹ That is helpful when you want it and dangerous when you don’t. If you would rather save your GST exemption for a different transfer, opt out on Schedule A, Part 3 by checking the appropriate column and attaching a statement.

Late allocations are possible on a subsequent Form 709, but they use the property’s fair market value on the date the late allocation is filed, not the date of the original gift. If the asset has doubled since then, you need twice the exemption to shield it. On-time allocation is almost always cheaper.

Disclose Enough to Start the Statute of Limitations

This is the part most people overlook, and it is the strongest reason to file even when no tax is due. The IRS normally has three years after you file to challenge the value you reported or assess more tax.¹⁰ After that window closes, the valuation is locked in. If you never file, the clock never starts, and the IRS can revisit the gift when your estate is settled.

The clock only starts if you adequately disclose the gift. A bare-bones entry like “100 shares of stock to daughter” is not enough for a hard-to-value asset. The Treasury regulations require:¹¹

A description of the property and whether you received anything in return.
The identity of the donor and recipient, including their relationship.
For gifts to a trust, the trust’s tax ID number and either a summary of the trust terms or a copy of the trust document.
A detailed explanation of how you arrived at fair market value, including financial data relied on, restrictions on the property, and any discounts claimed.
A statement identifying any position you took that conflicts with published IRS regulations or rulings.

Publicly traded securities are easier: listing the exchange, the CUSIP, and the mean of the high and low quoted prices on the gift date satisfies the valuation requirement. Interests in entities that do not trade publicly, such as an LLC membership interest, need much more detail, including the fair market value of 100% of the entity, your pro rata share, and an explanation of any valuation discounts. A qualified appraisal that meets IRS standards satisfies the valuation disclosure requirement as an alternative to spelling everything out yourself.

Deadlines, Extensions, and Where to Send It

Form 709 is due April 15 of the year after the gift. You cannot file it before January 1 of that year. Filing Form 4868 for an income tax extension automatically extends Form 709 to October 15. If you don’t need an income tax extension but want more time for the gift tax return, file Form 8892 for a separate six-month extension.⁵

An extension buys time to file, not to pay. Any gift tax owed is still due April 15, and interest and penalties start accruing after that.

If the donor died during the year, the executor files the Form 709, and it is due no later than the donor’s estate tax return, which is generally nine months after death.

Mailing Address

Paper returns go to a single address regardless of where you live:⁵

Department of the Treasury
Internal Revenue Service Center
Kansas City, MO 64999

Private delivery services (FedEx, UPS) go to: Internal Revenue Service, 333 W. Pershing Road, Kansas City, MO 64108.

Electronic Filing

The IRS accepts Form 709 electronically through its Modernized e-File (MeF) system.¹² Not all tax software supports gift tax e-filing, so check with your preparer. For a straightforward return, electronic submission is faster and removes mailing risk.

Penalties for Filing Late or Undervaluing

If you owe gift tax and file late, the failure-to-file penalty is 5% of the unpaid tax for each month the return is overdue, up to 25%.¹³ The failure-to-pay penalty runs 0.5% per month on any unpaid tax after April 15, also capped at 25%.¹⁴ When both apply in the same month, the filing penalty is reduced by the amount of the payment penalty, so the combined rate is effectively 5% per month for the first five months.

Valuation mistakes carry their own penalties. Reporting a gift at 65% or less of its actual fair market value triggers a 20% accuracy penalty on the resulting underpayment. Reporting at 40% or less doubles it to 40%.¹⁵ A professional appraisal looks cheap next to those numbers, especially for real estate or closely held business interests.

Even when the lifetime exemption absorbs everything and you owe no tax, failing to file leaves the statute of limitations open indefinitely. The real cost is not a penalty today but an IRS challenge years from now, when the property may have appreciated well beyond what you reported and the evidence needed to defend the original value is much harder to reassemble.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
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Internal Revenue Service. About Form 709, United States Gift (and Generation-Skipping Transfer) Tax Return
3
IRS.gov. 2025 Instructions for Form 709
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Office of the Law Revision Counsel. 26 USC 2503 – Taxable Gifts
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Internal Revenue Service. Instructions for Form 709 (2025)
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Internal Revenue Service. Form 709 (2025)
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Internal Revenue Service. What’s New – Estate and Gift Tax
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Office of the Law Revision Counsel. 26 USC 2513 – Gift by Husband or Wife to Third Party
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Office of the Law Revision Counsel. 26 USC 2632 – Special Rules for Allocation of GST Exemption
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Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection
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eCFR. 26 CFR 301.6501(c)-1 – Exceptions to General Period of Limitations on Assessment and Collection
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Internal Revenue Service. Modernized e-File (MeF) for Gift Taxes
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Internal Revenue Service. Failure to File Penalty
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Internal Revenue Service. Failure to Pay Penalty
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Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments