Donor Advised Fund Calculator

Calculate DAF tax benefits with bunching strategy. See capital gains avoided on appreciated stock.

By Konstantin Iakovlev · Updated September 2026 · Source: IRS Publication 526 — Charitable Contributions (26 U.S.C. § 170: AGI limits, 0.5% floor, donor-advised funds)

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$
Asset Type
$
Holding Period
%
%
Filing Status

Tax Deduction

$50,000.00

Tax Savings

$18,500.00

Capital Gains Avoided

$8,000.00

Tax Benefit

Charitable Deduction$50,000.00
Federal Tax Savings$16,000.00
State Tax Savings$2,500.00
Capital Gains Tax Avoided$8,000.00
Total Tax Benefit$26,500.00

Bunching Analysis (3 years)

Annual giving ($16,666.67/yr)Would take standard deduction
Total deductions without bunching$96,600.00
Total deductions with bunching$129,400.00
Additional deduction from bunching$32,800.00
Extra tax savings from bunching$10,496.00

Use the Donor Advised Fund Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

A donor-advised fund lets you front-load several years of charitable giving into one tax year, a tactic known as bunching. By concentrating contributions, you can claim a larger federal income tax deduction in the bunching year and, when you fund the account with appreciated stock instead of cash, sidestep the capital gains tax you would otherwise owe on those shares. This tool puts numbers to both effects, with the 2026 tax year in view.

Two estimates drive the results. Federal income tax savings come from multiplying your bunched charitable deduction by your estimated marginal tax rate. The capital gains side takes the donated shares' value minus the cost basis you enter and applies a flat 15% long-term rate plus your state rate to that gain. It uses 15% whatever your income, so it overstates the saving on gains that would have fallen in the 0% bracket and understates it at 20%.

Two pitfalls deserve attention before you act on the figures. If you owe Alternative Minimum Tax, the saving will differ from the figure shown: charitable gifts stay deductible under the AMT, which disallows state and local taxes rather than gifts, but each deducted dollar then saves tax at the AMT's rates instead of your regular bracket. Bunching also only pays off if your itemized deductions clear the standard deduction, $32,200 for married couples filing jointly and $16,100 for single filers in 2026, since deductions below that line are absorbed by the standard amount anyway.

Example: DAF Bunching with Appreciated Stock for 2026

  1. 1 Input: a married couple gives $50,000 of stock held more than a year, with a $10,000 cost basis, to a donor-advised fund to cover three years of giving. Their federal bracket is 32%, their state rate 5%, and their other itemized deductions come to $15,000.
  2. 2 Tax savings on the gift: $50,000 × 32% = $16,000 federal plus $50,000 × 5% = $2,500 state, $18,500 in all. Capital gains avoided: ($50,000 − $10,000) × (15% + 5%) = $8,000. The calculator's total tax benefit is $26,500.
  3. 3 Bunching: giving $16,667 a year on top of $15,000 of other deductions ($31,667) would stay under the $32,200 joint standard deduction, so without the fund they take the standard deduction each year: 3 × $32,200 = $96,600. With the fund, year one has $65,000 of itemized deductions and the other two years the standard deduction: $65,000 + $64,400 = $129,400. That is $32,800 more in deductions, worth $32,800 × 32% = $10,496 in federal tax.
  4. 4 Treat the figures as upper bounds. The calculator does not apply the 2026 rule that itemizers deduct only gifts above 0.5% of AGI, or the 30%-of-AGI limit on gifts of stock, and the $18,500 counts the whole gift as saving tax; the bunching lines show what the gift adds over the standard deduction.

Source: IRS Publication 526 — Charitable Contributions (26 U.S.C. § 170: AGI limits, 0.5% floor, donor-advised funds) · Last updated: September 2026

Frequently Asked Questions

What is a donor advised fund?
A DAF is a charitable giving account. You make an irrevocable contribution, receive an immediate tax deduction, then recommend grants to charities over time. DAFs are offered by Fidelity Charitable, Schwab Charitable, Vanguard Charitable, and community foundations with minimums as low as $0-$5,000.
What is the bunching strategy with a DAF?
Bunching means contributing several years worth of charitable giving to a DAF in one year to exceed the standard deduction and itemize. For example, donate 5 years of giving ($15,000/year = $75,000) in one year, claim the itemized deduction, then take the standard deduction in the other 4 years.
Can I donate appreciated stock to a DAF?
Yes, and it is one of the best strategies. You receive a deduction for the full fair market value and avoid capital gains tax on the appreciation. Donating $50,000 of stock with a $20,000 cost basis saves you the capital gains tax on $30,000 of appreciation, and the deduction is based on the full $50,000 value, subject to the 30%-of-AGI limit for gifts of stock and, from 2026, the rule that itemizers deduct only gifts above 0.5% of AGI.

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