An introduction to the federal gift tax: two shields and one unified credit
The federal gift tax is a backstop for the estate tax. Without it, anyone could empty their estate the day before death and escape transfer tax entirely, so Chapter 12 of the Internal Revenue Code (sections 2501 through 2524) taxes lifetime transfers of property for less than full and adequate consideration. In practice, though, the overwhelming majority of American donors will never write a gift tax cheque, because two protective layers sit in front of the tax. The first is the annual exclusion of section 2503(b), which shelters a fixed amount per recipient, per calendar year. The second is the applicable credit of section 2505, derived from the basic exclusion amount in section 2010(c), which shelters a very large cumulative lifetime total. This calculator models both layers the way Form 709 actually computes them.
The single most common misconception is that going over the annual exclusion triggers a tax bill. It does not. Crossing the annual exclusion for a given recipient converts the excess into a taxable gift, which creates a Form 709 filing obligation and permanently consumes a slice of the donor's lifetime basic exclusion amount. No money changes hands with the Treasury until cumulative taxable gifts across the donor's entire lifetime exceed the basic exclusion amount. For calendar year 2026 that amount is $15,000,000 per donor, so a donor would need to have made more than fifteen million dollars of reportable taxable gifts before a dollar of gift tax became payable. The tax exists; almost nobody pays it.
The second most common error is arithmetic rather than conceptual. Many published gift tax estimators — including the earlier version of this page — take the amount by which cumulative gifts exceed the exemption and run that figure through the section 2001(c) bracket table from the bottom. That is wrong, and it understates the tax. The brackets run from the first dollar of cumulative taxable gifts, and the exemption is delivered as a credit against the tentative tax, not as a deduction that resets the brackets. Because the basic exclusion amount is far above the $1,000,000 point where the top band begins, the credit is always exhausted inside the 40% band. The practical consequence is that the very first taxable dollar above the exemption is taxed at 40%, not at 18%. This page implements the credit method, so its figures reconcile to Form 709 Part 2 line for line.
Two further rules do real work in ordinary planning and are built into the form. Section 2513 lets a married couple elect gift splitting: every gift made by either spouse to a third party is treated as made one-half by each, which doubles the effective annual exclusion per recipient and puts two basic exclusion amounts behind the couple. Section 2503(e) provides an unlimited exclusion for tuition paid directly to a qualifying educational organisation and for medical care paid directly to the provider — those payments are not gifts at all, in any amount, and they never touch the annual exclusion or the exemption. Section 2523 adds an unlimited marital deduction for outright gifts to a spouse who is a United States citizen.
How to use this gift tax calculator without misreading the output
Pick the tax year of the gift first. Every dollar figure in this area is inflation-adjusted annually by revenue procedure, and using last year's number is the fastest way to get a wrong answer. Selecting a year auto-fills the statutory annual exclusion per recipient and the basic exclusion amount for that year; both remain editable if you are stress-testing a future scenario. Next enter the gift value per recipient — the fair market value on the date of the gift, not the donor's cost basis — and the number of recipients receiving that amount. Modelling recipients explicitly matters, because the exclusion is per donee: six gifts of $19,000 in 2026 produce zero taxable gift, while one gift of $114,000 produces $95,000 of taxable gift.
Then handle the special categories. If part of what you paid was tuition or medical care sent directly to the institution or provider, enter it in the section 2503(e) field; it is removed before the annual exclusion is applied, which is the correct ordering. Tick gift splitting only if you are married, your spouse consents, and you both intend to file. When it is ticked the calculator switches to a couple-level view: the exclusion per recipient doubles and two basic exclusion amounts are available, matching the combined position the two Forms 709 will show. Finally, enter prior taxable gifts — the running total from line 2 of your last Form 709, meaning gifts already reported net of annual exclusions and deductions, not every birthday cheque you have ever written.
Read the output in four layers rather than jumping to the last line. The first layer tells you how much of this year's transfer was absorbed by the exclusions. The second gives the taxable gift for the year and therefore whether Form 709 is due. The third shows how much applicable credit and basic exclusion amount survive the transfer — for most users this is the number that actually matters, because it is the estate-tax shelter left for later. Only the fourth layer is tax payable, and for the great majority of scenarios it will be zero. The exemption meter and the scenario table underneath let you see how much headroom remains and what would happen at other gift sizes.
The Form 709 formula, stated exactly
Start with the taxable gift for the year. Let be the gift value per recipient, the direct tuition and medical payments excluded under section 2503(e), the number of recipients, the statutory annual exclusion per donee, and a gift-splitting indicator equal to 2 when the section 2513 election is made and 1 otherwise. The taxable gift for the current year is then:
Notice that the two operators are not decoration. The annual exclusion cannot go negative and produce a credit against other gifts, and an unused portion of one recipient's exclusion cannot be transferred to another recipient. Cumulative taxable gifts add the prior-period total :
The section 2001(c) tentative-tax function is a twelve-band progressive schedule applied to cumulative taxable gifts from the first dollar. Written as a bracket sum, where is the base tax at the floor of band and its marginal rate:
The applicable credit amount for the year is not an arbitrary figure: section 2505(a)(1) defines it as the tentative tax on the basic exclusion amount . That identity is what makes the whole system self-consistent, and it is why the credit and the exemption are two descriptions of the same shelter:
The credit is used up chronologically. Whatever tentative tax the prior-period gifts generated has already absorbed credit, so only the remainder is available now. Putting the pieces together gives the gift tax payable for the current year, which is exactly the sequence of Form 709 Part 2:
Because is monotonic, that expression collapses to a much more intuitive statement, and it is worth internalising because it explains the 40% cliff:
Whenever cumulative gifts exceed a basic exclusion amount that is itself well above $1,000,000, both and sit in the top band, the base amounts cancel, and the result reduces to a flat 40% of the overshoot:
That closed form is the single best sanity check on any gift tax calculator. If an estimator tells you that the first slice above the exemption is taxed at 18%, 24% or 37%, it has treated the exemption as a deduction rather than a credit and it is wrong. The lower bands in the section 2001(c) table are not dead letters — they matter for computing for donors whose prior gifts are small, and they matter historically — but no modern donor reaches them on the marginal dollar.
A worked example: two children, gift splitting, and a 2026 transfer
Marguerite and Theo are married United States citizens. In 2026 Marguerite transfers $500,000 of publicly traded stock to each of their two adult children, a total of $1,000,000, from her own separate account. She also pays $62,000 of graduate tuition for one child directly to the university's bursar, and Theo consents to gift splitting under section 2513. There are no prior taxable gifts.
The tuition drops out immediately: paid directly to a qualifying educational organisation, it is excluded under section 2503(e) without limit and never enters the calculation. Note that this is a separate payment, not part of the $500,000 stock transfers, so the per-recipient gift stays at $500,000. With the split-gift election the effective annual exclusion becomes per recipient for 2026, so the taxable gift per child is and the taxable gift for the year is .
Cumulative taxable gifts are therefore $924,000. The couple's combined basic exclusion amount is for 2026, so is nowhere near and the gift tax due is $0. What the transfer does cost them is $924,000 of combined exemption, leaving $29,076,000 of shelter for future gifts and for their taxable estates. Critically, both spouses must file Form 709 for 2026: Marguerite because she made taxable gifts, and Theo because a section 2513 election requires the consenting spouse to file as well. Zero tax and no filing requirement are very different conclusions.
Now change one input to see the tax appear. Suppose the same donor had already made $14,600,000 of prior taxable gifts and, filing alone, gives $1,500,000 to one child in 2026. The taxable gift for the year is $1,481,000 and cumulative taxable gifts reach $16,081,000, which is $1,081,000 above the $15,000,000 basic exclusion amount. Working it through the formula: , , and the applicable credit is . Tax before credit is $592,400, remaining credit is $160,000, and the gift tax due is $432,400 — precisely 40% of the $1,081,000 overshoot. The older bracket-from-zero approach would have reported $378,200 for this same scenario, understating the liability by $54,200.
The statutory figures behind the calculator, year by year
Every dollar amount in this area is set by statute and then adjusted for inflation under section 2503(b)(2) and section 2010(c)(3)(B), with the operative figures published each autumn in a revenue procedure. The 2026 numbers come from Rev. Proc. 2025-32: section 4.42(1) fixes the annual exclusion at $19,000 per donee, section 4.42(2) fixes the special annual exclusion for gifts to a non-citizen spouse at $194,000, and section 2.14 records that section 70106 of Public Law 119-21 amended section 2010(c)(3) to set the basic exclusion amount at $15,000,000 for calendar year 2026, with inflation indexing resuming for 2027.
That last point deserves emphasis because a great deal of older planning commentary is now obsolete. The 2017 legislation that doubled the basic exclusion amount carried a sunset at the end of 2025, which would have cut the exemption roughly in half from 1 January 2026. That sunset was repealed before it took effect. Anything you read that describes an automatic reversion to about $7 million in 2026 predates the change. The exemption is not scheduled to fall on any particular date now, but it is a creature of statute and a future Congress can lower it, which is why "use it or lose it" gifting remains a live planning conversation rather than a settled one.
Statutory figures used by this calculator, by tax year of the gift
| Tax year |
Annual exclusion per donee (§2503(b)) |
Basic exclusion amount (§2010(c)) |
Applicable credit (§2505(a)(1)) |
| 2024 |
$18,000 |
$13,610,000 |
$5,389,800 |
| 2025 |
$19,000 |
$13,990,000 |
$5,541,800 |
| 2026 |
$19,000 |
$15,000,000 |
$5,945,800 |
The applicable credit column is derived, not looked up: it is the tentative tax on the basic exclusion amount, which is why the 2025 figure of $5,541,800 printed in the Instructions for Form 709 equals $345,800 plus 40% of $12,990,000. If you ever need to check a year not listed here, compute the credit from the exemption rather than trusting a secondary source. The calculator does exactly that, so an edited exemption figure produces a correctly matched credit automatically.
Two structural points follow from the credit identity. First, the annual exclusion is a genuine exclusion — amounts inside it never appear on the return as taxable gifts and never reduce the credit — whereas the basic exclusion amount is consumed permanently as taxable gifts accumulate. Second, the same credit does double duty: exemption spent on lifetime gifts is not available at death, because section 2001(b)(2) adds adjusted taxable gifts back into the estate tax base. Gifting does not by itself save transfer tax; it saves tax on the post-gift appreciation, which is a different and much better argument for making the gift.
The tax computation itself follows Form 709 Part 2 in order. The tentative tax on cumulative gifts less the tentative tax on prior gifts gives the tax on this year's transfer before credit, and only then is the unused applicable credit subtracted:
where represents the section 2001(c) tentative tax function, is cumulative taxable gifts, and is prior taxable gifts. Note carefully that is not zero when is below the basic exclusion amount — it is a large positive number that happens to be fully offset by the applicable credit. Treating the exemption as a deduction that zeroes the tentative tax is the error that makes most online gift tax estimators understate liability once the exemption is finally exhausted.
Unified rate schedule of 26 U.S.C. §2001(c), applied to cumulative taxable gifts
| Taxable Amount over |
Base Tax |
Rate on Excess |
| $0 |
$0 |
18% |
| $10,000 |
$1,800 |
20% |
| $20,000 |
$3,800 |
22% |
| $40,000 |
$8,200 |
24% |
| $60,000 |
$13,000 |
26% |
| $80,000 |
$18,200 |
28% |
| $100,000 |
$23,800 |
30% |
| $150,000 |
$38,800 |
32% |
| $250,000 |
$70,800 |
34% |
| $500,000 |
$155,800 |
37% |
| $750,000 |
$248,300 |
39% |
| $1,000,000 |
$345,800 |
40% |
Two of the base amounts in this table are worth checking against any other source you consult, because they are frequently mistyped: the base tax at the $60,000 floor is $13,000 and at the $80,000 floor it is $18,200. Each base is simply the cumulative tax at the bottom of the band, so they must chain exactly — $8,200 plus 24% of $20,000 gives $13,000, and $13,000 plus 26% of $20,000 gives $18,200. An earlier version of this page carried $13,800 and $20,200 in both the table and the script, which broke that chain and produced discontinuous tax jumps for small cumulative totals. If a schedule you find elsewhere does not chain, it is wrong.
The practical takeaway is that the progressive structure of the table is largely historical for living donors. Because the applicable credit is defined as the tentative tax on a basic exclusion amount well above $1,000,000, the credit runs out only after the calculation has entered the top band. Every marginal dollar of taxable gift beyond the exemption therefore attracts the flat 40% top rate. The lower bands still matter for computing the tentative tax on modest prior-period gifts, and they matter for historical returns, but a donor asking "what will my next taxable dollar cost?" should assume forty cents.
Interpreting the four numbers this calculator gives you
The total sheltered line adds the section 2503(e) direct payments to the annual exclusions actually used, and answers the question "how much of this transfer was free?". The taxable gift for the year is the figure that drives the filing obligation: any positive number means Form 709 is due by 15 April of the following year, whether or not tax is payable. The basic exclusion amount remaining is the planning number — it is the shelter that survives for future gifts and, ultimately, for the estate tax computation. The gift tax due line will read $0 for the vast majority of realistic scenarios, and when it does not, the amount is 40% of the overshoot.
A subtlety worth flagging: a zero taxable gift does not always mean no filing. Electing gift splitting requires both spouses to file even if every gift is inside the doubled exclusion. Gifts of future interests — typically transfers into certain trusts without Crummey withdrawal rights — do not qualify for the annual exclusion at all under section 2503(b), so they are reportable from the first dollar. Gifts of a partial interest, transfers to a non-citizen spouse above $194,000 for 2026, and gifts for which you wish to allocate generation-skipping transfer exemption all trigger a return. The calculator flags the common case; it cannot see the unusual ones.
Limitations of this estimator and the assumptions it makes
This tool is an educational estimator, not tax advice, and it is deliberately narrower than Form 709. Its explicit assumptions are these. It assumes the donor is a United States citizen or resident, that every gift is a completed transfer of a present interest so the annual exclusion applies, and that the value you enter is already the correct fair market value on the date of the gift. It assumes each of the recipients you specify receives the same amount, which is a modelling simplification — where recipients receive different amounts you should run them separately and add the taxable gifts, because unused exclusion for one donee cannot subsidise another. It assumes all prior taxable gifts were made in periods where the exemption at least equalled the amount used, so no clawback adjustment is required.
What it does not model is at least as important. It does not compute the generation-skipping transfer tax, which is a separate 40% flat tax under Chapter 13 with its own $15,000,000 exemption for 2026 and which routinely applies to gifts to grandchildren or to dynasty trusts. It does not apply valuation discounts for lack of marketability or lack of control, which for closely held business interests can change the taxable gift by tens of percent and require a qualified appraisal. It does not handle split-interest transfers such as GRATs, QPRTs or charitable lead trusts, where the taxable gift is the actuarial remainder computed with a section 7520 rate rather than the transferred value. It does not apply the charitable deduction of section 2522 or the marital deduction of section 2523, so gifts to charity or to a citizen spouse should simply be excluded from the amounts you enter.
It also ignores state-level transfer taxes. Connecticut is currently the only state with its own gift tax, but a dozen or so states impose estate or inheritance taxes with thresholds far below the federal figure, and lifetime gifting interacts with those regimes differently from state to state. Finally, it does not consider income tax consequences, which frequently dominate the decision: gifted property carries over the donor's basis under section 1015, whereas property held until death generally receives a basis adjustment under section 1014. For an appreciated asset with no estate tax exposure, gifting during life can be the more expensive choice overall. Confirm any real transaction with the Instructions for Form 709 and a qualified estate-planning attorney or CPA before acting.
Sources and how the figures were verified
All statutory figures on this page were taken from primary documents rather than secondary summaries. The 2026 annual exclusion of $19,000, the $194,000 non-citizen-spouse exclusion, and the $15,000,000 basic exclusion amount were read directly from the IRS revenue procedure text; the rate schedule was read from the Code; and the applicable credit method was checked against the Form 709 instructions, whose published 2025 credit of $5,541,800 reconciles exactly with the tentative tax on the 2025 basic exclusion amount of $13,990,000.
- Internal Revenue Service, Rev. Proc. 2025-32, sections 2.14 and 4.42 (2026 inflation-adjusted items) — irs.gov/pub/irs-drop/rp-25-32.pdf
- Internal Revenue Service, Instructions for Form 709, United States Gift (and Generation-Skipping Transfer) Tax Return, Part 2 Tax Computation and Table for Computing Gift Tax — irs.gov/instructions/i709
- Internal Revenue Service, Frequently Asked Questions on Gift Taxes (annual exclusion by year of gift; basic exclusion amount) — irs.gov Estate and Gift Tax FAQ
- Office of the Law Revision Counsel, U.S. House of Representatives, 26 U.S.C. §2001(c) (unified rate schedule), §2010(c), §2503(b) and (e), §2505, §2513 and §2523 — uscode.house.gov, Title 26 §2001
- Internal Revenue Service, Publication 559, Survivors, Executors, and Administrators (gift tax overview and filing) — irs.gov/publications/p559
- Public Law 119-21, section 70106, amending 26 U.S.C. §2010(c)(3) to set the 2026 basic exclusion amount at $15,000,000.
Informational only. This page is not tax, legal or financial advice, no professional relationship is created by using it, and the figures shown are estimates that may not match a filed return.