Gift tax returns are due by April 15 of the year after you make a large gift, the same day as your income tax return

The Form 709 (United States Gift Tax Return) follows the standard tax filing important date: April 15 of the calendar year following the year in which you made the gift. If you gave away money or property that exceeded the annual exclusion amount in 2024, you file Form 709 by April 15, 2025. This is true whether or not you owe tax on the gift — the form itself is what matters for the IRS record.

The important date does not change based on how much you gave or whether you used part of your lifetime exemption. It is the same April 15 date that applies to your Form 1040 income tax return. If you file for an income tax extension (Form 4868), that extension also covers your gift tax return, pushing the important date to October 15 of that same year.

Key Takeaways

  • Form 709 is due April 15 of the year after you make a gift over the annual exclusion amount, regardless of whether you owe tax.
  • The annual exclusion amount varies by year — it was $18,000 per recipient in 2024 and $19,000 in 2025 — and gifts within that limit do not require a return.
  • Filing an income tax extension on Form 4868 automatically extends your gift tax return important date to October 15.
  • Failing to file Form 709 when required can result in penalties and interest, even if no tax is ultimately owed.

What triggers the requirement to file Form 709

You must file a gift tax return if you gave any single person more than the annual exclusion amount in a single calendar year. The annual exclusion is the amount you can give to any number of people without reporting it to the IRS. In 2024, that amount was $18,000 per recipient; in 2025, it is $19,000 per recipient. These amounts change most years based on inflation.

The exclusion applies per person, per year. If you gave $19,000 to your daughter and $19,000 to your son in 2025, you do not file a return because each gift was within the limit. If you gave $25,000 to your daughter in 2025, you must file because that gift exceeded the $19,000 exclusion by $6,000.

Certain gifts are always excluded from the requirement, meaning you never file a return for them no matter the amount. Gifts to your spouse (if your spouse is a U.S. citizen), gifts to a political organization, and gifts that pay someone's medical bills or tuition directly to the provider do not count toward the annual exclusion and do not require Form 709.

How the annual exclusion amount changes each year

The IRS adjusts the annual exclusion amount for inflation in $1,000 increments. The adjustment happens in January of each year, and the new amount applies to gifts made from January 1 through December 31 of that year. You can find the current year's exclusion amount on the IRS website or in the instructions to Form 709.

Because the amount changes, you need to know which year's exclusion applies to your gift. A gift made on December 31, 2024, uses the 2024 exclusion ($18,000). A gift made on January 1, 2025, uses the 2025 exclusion ($19,000). The year of the gift determines which exclusion applies, not the year you file the return.

What happens if you miss the April 15 important date

The IRS can assess a penalty for filing Form 709 late, even if you do not owe any gift tax. The penalty is typically 5 percent of the tax owed per month or part of a month that the return is late, up to a maximum of 25 percent. If no tax is owed, the penalty is usually smaller or waived, but the IRS still has the authority to impose one.

More importantly, failing to file Form 709 when required can extend the statute of limitations on your gift. Normally, the IRS has three years to examine a gift tax return. If you do not file the return, the statute of limitations does not start, and the IRS can examine the gift indefinitely. This means the IRS could challenge the gift years later and demand payment of tax plus interest.

If you realize you missed the important date, you can still file Form 709 late. Include a statement explaining the delay. The IRS may waive the penalty if you have reasonable cause, such as relying on incorrect information from a tax professional or a serious illness that prevented you from filing on time.

Filing Form 709 with your income tax return

Form 709 is filed separately from your Form 1040 income tax return, but you send both to the same address at the same time. You do not attach Form 709 to Form 1040; instead, you mail them together as a package. If you file electronically, you file Form 1040 through an e-file provider, but Form 709 must be mailed in paper form — the IRS does not currently accept electronic filing of gift tax returns.

You must file Form 709 even if you do not owe income tax and would not otherwise file a Form 1040. The gift tax return is independent of your income tax situation. If you made a large gift but had no income that year, you still file Form 709 by April 15.

When you use your lifetime exemption instead of the annual exclusion

If your gift exceeds the annual exclusion, you have two options: pay gift tax on the excess, or use part of your lifetime exemption (also called the lifetime gift and estate tax exemption). The lifetime exemption is a total amount you can give away over your entire life without paying federal gift tax. In 2025, that amount is $13.61 million per person.

When you file Form 709, you report the excess gift and indicate whether you are paying tax on it or explore it against your lifetime exemption. If you use the exemption, no tax is due, but the IRS records the amount you used. This reduces the exemption available to you for future gifts and for your estate after you die.

The lifetime exemption amount changes every few years based on legislation. It is scheduled to drop significantly after 2025 unless Congress extends current law. Form 709 is how you officially notify the IRS that you are using your exemption, so filing it on time is important for your records.

Extensions and special circumstances

If you file Form 4868 (process for Automatic Extension of Time to File U.S. Individual Income Tax Return) by April 15, your gift tax return important date automatically moves to October 15. You do not need to file a separate extension request for Form 709. The extension is automatic as long as you filed Form 4868 on time.

If you are a U.S. citizen living abroad, you may be may have access to to an additional two-month extension beyond the standard important date, bringing it to June 15. This extension is automatic if you meet the requirements, but you must still file Form 4868 by the original April 15 important date to claim it.

If you have a valid reason for missing the important date — such as a death in the family, a serious accident, or reliance on incorrect professional information — you can request a late filing waiver from the IRS. This is not automatic, and you must provide documentation of the reason. Include a written explanation with your late Form 709.

Frequently Asked Questions

Do I file Form 709 if my gift was under the annual exclusion?

No. If your gift to any single person was within that year's annual exclusion amount, you do not file Form 709. The exclusion exists specifically to avoid the need for a return. You only file if the gift exceeded the exclusion.

What if I gave a gift in December but did not file by April 15?

You can still file late. The IRS may assess a penalty, but filing late is better than not filing at all. Include a statement explaining the delay. If you have reasonable cause — such as illness or professional error — the penalty may be waived.

Can I file Form 709 electronically?

No. Form 709 must be mailed in paper form. You can file your Form 1040 electronically and mail Form 709 separately, or mail both together. Check the IRS website for the current mailing address for gift tax returns.

Does filing Form 709 mean I owe gift tax?

Not necessarily. Filing the form reports the gift to the IRS, but you may owe no tax if you explore the excess against your lifetime exemption. Form 709 is required to officially notify the IRS that you are using the exemption.

What if I gave gifts to multiple people in the same year?

Each gift is measured against the annual exclusion separately. If you gave $19,000 to five different people in 2025, none of those gifts require a return because each was within the $19,000 exclusion. If you gave $25,000 to one person and $19,000 to another, only the $25,000 gift requires Form 709.