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All tools Checked September 3, 2026

Tax calculator

Donor-Advised Fund Bunching Calculator

Could bunching charitable gifts create a larger usable federal deduction?

Compare yearly gifts with putting several years of gifts into a donor-advised fund in one year.

Before you calculate

Which best describes you?

Choose the path that fits. It changes the guidance around the result, not the calculation.

How to use it

Start with the numbers you know.

Estimates are okay. Nothing is submitted when you calculate.

What this calculator estimates

Compare yearly gifts with putting several years of gifts into a donor-advised fund in one year.

Question-mark icons explain less-obvious terms. Hover, focus, or tap them for plain-English help.
Tax return
Use the filing status expected on the federal income-tax return for this year.
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Giving plan
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years
Gift type
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Adjust assumptions

Defaults are prefilled. Review returns, timing, costs, and rates before relying on this estimate.

Tax rates
The 2026 federal value of itemized deductions is generally capped at 35% for taxpayers in the top bracket.
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Start with the decision

Could bunching charitable gifts create a larger usable federal deduction?

Bunching several years of charitable gifts into one donor-advised fund contribution can create a larger itemized deduction in the contribution year while grants continue over time. This calculator compares annual and bunched deductions under 2026 rules, including the new charitable floor and visible adjusted-gross-income limits.

Before you act on the number

See what the result means—and what could change it.

01

How to read it

  • Focus on deductions actually used, not just the size of the contribution.
  • Check whether the bunch-year gift exceeds the AGI limit and creates a carryforward.
  • For appreciated stock, confirm holding period, basis, valuation, and sponsor acceptance before transferring shares.
02

What could change the answer

  • The separate 2026 limit on the tax value of itemized deductions for some high-income taxpayers
  • Appraisals, substantiation, excess-benefit, or donor-advised fund prohibited-benefit rules
  • Carryforward use in later tax years with changing income
  • State tax, sponsor fees, investment results, grant recommendations, or legal control of the contribution
03

What to take forward

Use the result to identify which assumption needs verification, then bring that question to the professional helping you make the decision.

Transparent method

How the estimate works

See how the estimate is calculated

Apply the 2026 charitable deduction floor of 0.5% of adjusted gross income to annual gifts and to the larger contribution in the bunching year.

Limit the current deduction to the entered asset type's general adjusted-gross-income percentage, then compare itemized deductions with the filing-status standard deduction each year.

Estimate the tax difference from added deductions and separately show possible long-term capital-gain tax avoided when appreciated public stock funds the account.

Common questions

Frequently asked questions

What does charitable bunching mean?

It means making several years of deductible gifts in one tax year so itemized deductions may exceed the standard deduction, then using the standard deduction in other years.

Why use a donor-advised fund?

The donor can make one deductible contribution to the sponsoring charity and recommend grants over time, although the sponsor has exclusive legal control of the assets.

What is the 2026 charitable deduction floor?

For taxpayers who itemize, deductible charitable contributions generally begin only above 0.5% of adjusted gross income starting in 2026.

Can appreciated stock be donated?

Public stock held more than one year may generally support a fair-market-value deduction subject to limits and may avoid realizing embedded gain, but basis and substantiation must be confirmed.

Sources

Rules and references behind this calculator

See every published value
Method referenceIRS Publication 526Public source used to define this calculator's method and limitsOpen source

Want the fine print? See sources, methods, and limits.

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