How gift tax is worked out
Gift tax has three steps, and the first two cost most people nothing. First, the annual exclusion: in 2026 you can give $19,000 to each person, every year, and none of it counts. Second, anything over the exclusion is the taxable gift, and it counts against a $15,000,000 lifetime exemption — the same exemption that shields your estate. Third, only when that lifetime exemption is used up does any tax come due, at the 40% top rate. A Form 709 is required whenever the taxable gift is over $0, even when the tax due is $0.00. The gift tax is paid by the giver, not the recipient, and gifts to a U.S. citizen spouse are unlimited — they are not modelled here at all.
At the defaults — a $50,000 gift to 1 recipient, a single donor, $0 of prior taxable gifts used — the exclusion is 1 × $19,000 = $19,000.00. The taxable gift is $50,000 − $19,000 = $31,000.00. The remaining lifetime exemption is $15,000,000 − $0 − $31,000 = $14,969,000.00. The tax due now is $0.00, because $14,969,000.00 of exemption is still there. Form 709 is required, because the taxable gift is over $0.
| Case | Exclusion | Taxable gift | Remaining exemption | Tax due | Form 709 |
|---|
| Default ($50,000, 1 recipient, single, $0 prior) | $19,000.00 | $31,000.00 | $14,969,000.00 | $0.00 | Yes |
| Gift $19,000 | $19,000.00 | $0.00 | $15,000,000.00 | $0.00 | No |
| Gift $19,001 | $19,000.00 | $1.00 | $14,999,999.00 | $0.00 | Yes |
| Gift $100,000 | $19,000.00 | $81,000.00 | $14,919,000.00 | $0.00 | Yes |
| Gift $1,000,000 | $19,000.00 | $981,000.00 | $14,019,000.00 | $0.00 | Yes |
| Gift $100,000 across 2 recipients | $38,000.00 | $62,000.00 | $14,938,000.00 | $0.00 | Yes |
| Gift $50,000, couple gift-splitting | $38,000.00 | $12,000.00 | $14,988,000.00 | $0.00 | Yes |
| Gift $76,000 across 4 recipients | $76,000.00 | $0.00 | $15,000,000.00 | $0.00 | No |
| Prior used $14,900,000, gift $200,000 | $19,000.00 | $181,000.00 | -$81,000.00 | $32,400.00 | Yes |
| Prior used $14,900,000, gift $119,000 | $19,000.00 | $100,000.00 | $0.00 | $0.00 | Yes |
| Prior used $13,000,000, gift $2,500,000 | $19,000.00 | $2,481,000.00 | -$481,000.00 | $192,400.00 | Yes |
The worked example, line by line
Setup: gift $50,000, recipients 1, donor single, prior taxable gifts used $0.
Line 1 — the exclusion. 1 × $19,000 = $19,000.00.
Line 2 — the taxable gift. $50,000 − $19,000 = $31,000.00.
Line 3 — the remaining lifetime exemption. $15,000,000 − $0 − $31,000 = $14,969,000.00.
Line 4 — the tax due now. The remaining exemption is $14,969,000.00, so the tax due is $0.00.
Line 5 — Form 709. The taxable gift is $31,000.00, which is over $0, so Form 709 is required.
Reverse: a $119,000.00 gift gives a $100,000.00 taxable gift; the most you can give to 3 recipients with no taxable gift is $57,000.00; a $1,019,000.00 gift leaves exactly $14,000,000.00 of exemption; the most you can give with no tax due when $14,500,000 is already used is $519,000.00 (taxable $500,000.00, remaining $0.00); prior used of $14,919,000.00 is where tax first starts on a $100,000 gift (at exactly that, remaining $0.00 and tax $0.00; one dollar more used and tax starts).
Every branch, checked
Gift $19,000: the exclusion is $19,000.00, so the taxable gift is $0.00, the remaining exemption stays $15,000,000.00, the tax is $0.00 and no Form 709 is needed. This is the whole point of the exclusion: a gift at or under it leaves no trace at all.
Gift $19,001: the exclusion is still $19,000.00, so the taxable gift is $1.00 — and that one dollar means Form 709 is required. The remaining exemption is $14,999,999.00 and the tax is still $0.00. One dollar over the line is the difference between no paperwork and a return.
Gift $100,000: the exclusion is $19,000.00 and the taxable gift is $81,000.00. The remaining exemption is $14,919,000.00 and the tax is $0.00. Form 709 is required.
Gift $1,000,000: the exclusion is $19,000.00 and the taxable gift is $981,000.00. The remaining exemption is $14,019,000.00 and the tax is $0.00. Even a million-dollar gift owes nothing while the exemption holds — the exemption is what matters, not the size of one gift.
Gift $100,000 across 2 recipients: the exclusion is 2 × $19,000 = $38,000.00, so the taxable gift is $62,000.00 and the remaining exemption is $14,938,000.00. Splitting the gift between two people saves $19,000.00 of taxable gift, because each recipient gets their own exclusion.
Gift $50,000, couple gift-splitting: the exclusion is $38,000.00, so the taxable gift is $12,000.00 and the remaining exemption is $14,988,000.00. Gift splitting is worth $19,000.00 of taxable gift on this one gift alone.
Gift $76,000 across 4 recipients: the exclusion is 4 × $19,000 = $76,000.00, so the taxable gift is $0.00, the remaining exemption stays $15,000,000.00, and no Form 709 is needed. Four people at $19,000 each moves $76,000 a year with no tax and no form.
Prior used $14,900,000, gift $200,000: the exclusion is $19,000.00 and the taxable gift is $181,000.00. The remaining exemption is $15,000,000 − $14,900,000 − $181,000 = -$81,000.00 — the exemption is blown past by $81,000. The tax due is 40% of $81,000, which is $32,400.00. Form 709 is required.
Prior used $14,900,000, gift $119,000: the exclusion is $19,000.00 and the taxable gift is $100,000.00. The remaining exemption is $15,000,000 − $14,900,000 − $100,000 = $0.00 exactly — the exemption is exhausted exactly, and the tax is still $0.00. Form 709 is required.
Prior used $13,000,000, gift $2,500,000: the exclusion is $19,000.00 and the taxable gift is $2,481,000.00. The remaining exemption is -$481,000.00, so the tax due is 40% of $481,000, which is $192,400.00. Form 709 is required.
Reverse — the other way round: a $100,000.00 taxable gift needs a $119,000.00 gift; the most you can give to 3 recipients with no taxable gift is $57,000.00; a $1,019,000.00 gift leaves exactly $14,000,000.00 of exemption; the most you can give with no tax due when $14,500,000 is already used is $519,000.00; prior used of $14,919,000.00 is where tax first starts on a $100,000 gift.
What the defaults assume
The model assumes the 2026 figures: a $19,000 annual exclusion per recipient ($38,000 with married-couple gift splitting) and a $15,000,000 lifetime gift and estate exemption per person, from IRS Rev. Proc. 2025-32. It assumes the gift is split evenly in the sense that the exclusion is per recipient, and it assumes the prior taxable gifts used you enter are right — check them, because they decide when the tax starts. It leaves out gifts to a U.S. citizen spouse, which are unlimited and are not modelled here, and it leaves out state gift taxes, which a few states still charge. The 40% rate is a simplification: the real federal schedule is graduated from 18% to 40%, and this calculator applies the 40% top rate to the amount over the exemption once it is exhausted. Rounding convention: money is rounded to cents, and all figures are computed from unrounded values, rounded only for display.
Output · formula · meaning
| Output | Formula | What it means |
| Annual exclusion | recipients × $19,000 ($38,000 with gift splitting) | $19,000.00. |
| Taxable gift | gift − exclusion (never below $0) | $31,000.00. |
| Remaining lifetime exemption | $15,000,000 − prior used − taxable gift | $14,969,000.00. |
| Tax due now | 40% × the amount over the exemption, $0 while any exemption remains | $0.00. |
| Form 709 required | yes if the taxable gift is over $0 | Yes, required. |
| Gift for a $100,000 taxable gift | $100,000 + exclusion | $119,000.00. |
| Max gift to 3 recipients, no taxable gift | 3 × $19,000 | $57,000.00. |
| Gift leaving $14,000,000 remaining | $1,000,000 + exclusion | $1,019,000.00. |
| Max gift with no tax due | remaining exemption + exclusion | $15,019,000.00 at $0 prior used; $519,000.00 when $14,500,000 is already used. |
| Prior used that first triggers tax | $15,000,000 − taxable gift | $14,969,000.00 at this gift; $14,919,000.00 on a $100,000 gift. |
| Gift $19,000 | same model, $19,000 gift | Exclusion $19,000.00, taxable $0.00, remaining $15,000,000.00, tax $0.00, Form 709 No. |
| Gift $19,001 | same model, $19,001 gift | Exclusion $19,000.00, taxable $1.00, remaining $14,999,999.00, tax $0.00, Form 709 Yes, required. |
| Gift $100,000 | same model, $100,000 gift | Exclusion $19,000.00, taxable $81,000.00, remaining $14,919,000.00, tax $0.00, Form 709 Yes, required. |
| Gift $1,000,000 | same model, $1,000,000 gift | Exclusion $19,000.00, taxable $981,000.00, remaining $14,019,000.00, tax $0.00, Form 709 Yes, required. |
| Gift $100,000 across 2 recipients | same model, 2 recipients | Exclusion $38,000.00, taxable $62,000.00, remaining $14,938,000.00, tax $0.00, Form 709 Yes, required. |
| Gift $50,000, couple gift-splitting | same model, gift splitting | Exclusion $38,000.00, taxable $12,000.00, remaining $14,988,000.00, tax $0.00, Form 709 Yes, required. |
| Gift $76,000 across 4 recipients | same model, 4 recipients | Exclusion $76,000.00, taxable $0.00, remaining $15,000,000.00, tax $0.00, Form 709 No. |
| Prior used $14,900,000, gift $200,000 | same model, exemption nearly used | Exclusion $19,000.00, taxable $181,000.00, remaining -$81,000.00, tax $32,400.00, Form 709 Yes, required. |
| Prior used $14,900,000, gift $119,000 | same model, exemption exhausted exactly | Exclusion $19,000.00, taxable $100,000.00, remaining $0.00, tax $0.00, Form 709 Yes, required. |
| Prior used $13,000,000, gift $2,500,000 | same model, exemption blown past | Exclusion $19,000.00, taxable $2,481,000.00, remaining -$481,000.00, tax $192,400.00, Form 709 Yes, required. |
Who uses this
- The parent helping a child with a house deposit: they learn a $50,000 gift leaves a $31,000.00 taxable gift and no tax — so they know a Form 709 is needed but nothing is owed, and they check the $19,000 case before deciding how much to give.
- The couple giving to several children: they learn $76,000 across 4 recipients at $19,000 each leaves a $0.00 taxable gift — so they know how to move money with no form at all, and they check the gift-splitting case at $38,000.00 before giving more.
- The family planning a large gift: they learn a $1,000,000 gift leaves a $981,000.00 taxable gift and still no tax — so they know the exemption is what matters, and they check the $14,919,000.00 prior-used figure before worrying about the tax.
- The executor sorting out an estate: they learn prior used of $14,900,000 plus a $200,000 gift means $32,400.00 of tax — so they know exactly where the exemption ran out, and they check the $0.00-exact case before filing.
Accuracy & limitations
The math is exact for the numbers you enter: the exclusion is the recipients times $19,000 ($38,000 with splitting), the taxable gift is the gift minus the exclusion, and the remaining exemption is $15,000,000 minus the prior used minus the taxable gift. What the model cannot do is check your prior gifts for you: count them honestly, because a taxable gift you forgot about is the one that starts the tax. It assumes the 2026 figures and leaves out gifts to a U.S. citizen spouse, which are unlimited, and state gift taxes, which a few states still charge. The 40% rate is a simplification — the real federal schedule is graduated from 18% to 40%. For what a child’s college savings are worth, see 529 plan vs Roth IRA for college; for the credit a family gets for a child, see child tax credit calculator.
Cite this calculatorBright Side Kit. “Gift Tax Calculator: Exclusion, Taxable Gift & Form 709 2026.” brightoolbox.com, 2026. Method: annual exclusion $19,000 per recipient ($38,000 with married-couple gift splitting); total exclusion = recipients × exclusion; taxable gift = max(0, gift − total exclusion); remaining lifetime exemption = $15,000,000 − prior taxable gifts used − taxable gift; tax due = 40% × the amount over the exemption, $0 while any exemption remains; Form 709 required iff the taxable gift is over $0. 2026 figures from IRS Rev. Proc. 2025-32. Defaults: gift $50,000; 1 recipient; single donor; prior $0 → exclusion $19,000.00, taxable $31,000.00, remaining $14,969,000.00, tax $0.00, Form 709 required. Branches: $19,000 → taxable $0.00, remaining $15,000,000.00, Form 709 no; $19,001 → taxable $1.00, remaining $14,999,999.00, Form 709 yes; $100,000 → taxable $81,000.00, remaining $14,919,000.00; $1,000,000 → taxable $981,000.00, remaining $14,019,000.00; $100,000 across 2 recipients → exclusion $38,000.00, taxable $62,000.00, remaining $14,938,000.00; $50,000 couple splitting → exclusion $38,000.00, taxable $12,000.00, remaining $14,988,000.00; $76,000 across 4 recipients → exclusion $76,000.00, taxable $0.00, remaining $15,000,000.00, Form 709 no; prior $14,900,000 + gift $200,000 → taxable $181,000.00, remaining -$81,000.00, tax $32,400.00; prior $14,900,000 + gift $119,000 → taxable $100,000.00, remaining $0.00 exactly, tax $0.00; prior $13,000,000 + gift $2,500,000 → taxable $2,481,000.00, remaining -$481,000.00, tax $192,400.00. Reverses: $100,000 taxable gift → $119,000.00 gift; 3 recipients, no taxable gift → $57,000.00; $14,000,000 remaining → $1,019,000.00 gift; no tax due at prior $14,500,000 → $519,000.00 gift; first tax on a $100,000 gift → prior used $14,919,000.00. Bright Side Kit. "Gift Tax Calculator: Exclusion, Taxable Gift & Form 709 2026." https://brightoolbox.com/gift-tax-calculator/ Accessed October 25, 2026.
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