A donor-advised fund (DAF) is a giving account that lets you put aside money or appreciated securities today, take the full tax deduction this year, and then recommend grants to your favorite charities on your own schedule. It is one of the most tax-efficient ways to give, especially if you hold highly appreciated stock, mutual funds, or ETFs with a large unrealized gain.
This calculator estimates four things at once: the charitable deduction you can claim now (capped at 30% of your AGI for long-term appreciated assets), the capital-gains tax you avoid by donating the shares directly instead of selling them, the tax-free growth your DAF balance can earn before you grant it, and the total dollars that will eventually reach the charities you support.
How to Use
- Enter the Donation (Fair Market Value) — what the appreciated asset is worth on the day you contribute it to the DAF. This is the number you deduct, not your original purchase price.
- Fill in the Cost Basis — what you originally paid for the shares. The gap between fair market value and basis is the unrealized gain you would owe long-term capital gains tax on if you sold the asset yourself.
- Set your Marginal Federal Tax Bracket. This calculator uses your top ordinary bracket to value the deduction. If you also pay state income tax, your real savings will be even higher.
- Enter your Long-Term Capital Gains Rate. Most middle-income investors pay 15%; high earners pay 20% and may also owe the 3.8% net investment income tax.
- Type your Adjusted Gross Income (AGI). For gifts of appreciated assets to a DAF, the IRS limits the deduction to 30% of your AGI in the year of the gift. Anything above that can be carried forward for up to five more tax years.
- Use the optional Expected DAF Investment Return and Years Until You Recommend Grants sliders to project how the money can grow inside the DAF before you send it to charity. Growth inside a DAF is tax-free.
The result card breaks out your deduction, the carryforward, your immediate tax savings, the capital-gains tax you skip, the combined upfront benefit, the projected DAF balance at grant time, and your net out-of-pocket cost after the tax savings.
The Math Behind a DAF Gift
When you donate long-term appreciated securities held more than one year, the IRS lets you deduct the full fair market value — not just what you paid. That unlocks two tax benefits at once:
- Income-tax deduction at your marginal rate, capped at 30% of AGI for appreciated assets (60% if you donate cash).
- Zero capital-gains tax on the built-in appreciation. Normally, selling a $50,000 position that cost you $20,000 would trigger a tax bill on the $30,000 gain. Donating it directly to the DAF erases that tax entirely.
Inside the DAF, investments compound without tax drag. When you finally recommend a grant to a public charity, the full balance goes to the nonprofit — no further tax is ever taken out. That is why even a short five- or ten-year window can meaningfully increase the dollars your chosen causes receive.
Worked example: a $50,000 gift of stock with a $20,000 basis, in a 32% bracket with a 15% long-term capital-gains rate, against $200,000 of AGI. The 30% AGI ceiling is $60,000, so the full $50,000 is deductible this year. Income-tax savings are $50,000 × 32% = $16,000. The $30,000 unrealized gain would have cost you $4,500 in capital-gains tax if you had sold; donating the shares directly avoids that. Total upfront tax benefit is $20,500, so your real out-of-pocket cost is only $29,500 — yet the charity eventually receives the full $50,000, and if it grows at 7% for five years, that balance becomes about $70,128 when you grant it.
The 30% AGI Limit and the 5-Year Carryforward
The most common surprise for new DAF donors is the AGI ceiling. If your deduction would exceed 30% of AGI (for appreciated assets) or 60% (for cash), the excess does not disappear — it carries forward into the next tax year, subject to the same percentage limit. You have up to five years to use the carryforward before it expires.
Example: a $1,000,000 stock gift against $500,000 of AGI. The 30% ceiling is only $150,000, so you deduct $150,000 this year and carry forward the remaining $850,000. The calculator shows this split explicitly so you can plan multi-year giving rather than assuming the whole gift is deductible tomorrow.
Examples
Example 1 — The concentrated stock winner. A tech employee holds $200,000 of company stock that cost $30,000, and wants to give $50,000 to her alma mater. She contributes the shares to a DAF, deducts $50,000, saves about $16,000 at her 32% bracket, and skips roughly $6,000 of capital-gains tax on the donated gain. Net cost to her is about $28,000; after five years at 7%, the DAF sends about $70,000 to the university.
Example 2 — The AGI-cap trap. A retiree has $100,000 of AGI and wants to donate a $200,000 appreciated mutual fund. Only $30,000 (30% of AGI) is deductible this year; the remaining $170,000 spreads over the next five years. The calculator flags the carryforward so she does not over-claim on this year's return.
Example 3 — Mega donor seven-figure gift. A donor in the 37% federal bracket contributes $1,000,000 of stock with a $400,000 basis, against $500,000 of AGI. This year's deduction is capped at $150,000, saving $55,500 of income tax, and the $600,000 of unrealized gain would have cost $120,000 at the 20% long-term rate. Combined upfront benefit: $175,500. Over ten years at 6%, the DAF balance grows to roughly $1,790,848, every dollar of which is granted to charity tax-free.
FAQ
What is a donor-advised fund?
A donor-advised fund is a charitable giving account held by a sponsoring organization such as Fidelity Charitable, Schwab Charitable, or a community foundation. You irrevocably contribute cash or appreciated assets, receive an immediate tax deduction, and then recommend grants to IRS-qualified public charities from the invested balance over time.
How much can I deduct for a DAF contribution?
For long-term appreciated assets such as stock or mutual funds held more than one year, you can deduct the full fair market value, up to 30% of your AGI. For cash, the limit is 60% of AGI. Any amount above the limit carries forward for up to five additional tax years.
Is it better to donate stock or cash to a DAF?
Donating long-term appreciated stock is almost always better than donating cash, because it lets you avoid the capital-gains tax you would owe if you sold the stock first. A $50,000 gift of stock with a $20,000 basis saves you the income-tax deduction on $50,000 plus the capital-gains tax on the $30,000 gain — a double benefit that cash gifts cannot match.
How does the 30% AGI limit actually work?
If your DAF contribution is larger than 30% of your AGI (for appreciated assets), you deduct 30% of AGI this year and carry the excess forward. The carryforward is also subject to the 30% ceiling in each future year. You have five years to use it before it expires. This calculator shows both the current-year deduction and the carryforward amount separately.
Does the money inside a DAF grow tax-free?
Yes. Once assets are in the DAF, dividends, interest, and capital gains inside the account are not taxed. That tax-free compounding is why holding the balance in the DAF for several years before granting can significantly increase the final gift to charity.
Which charities can I grant to?
You can recommend grants to virtually any IRS-qualified 501(c)(3) public charity, including schools, hospitals, churches, and most nonprofits operating domestically. Grants to private foundations, supporting organizations, or to individuals for personal benefit are generally not allowed.
How long can money stay in a DAF?
There is no required sunset. Once contributed, assets can remain invested in the DAF indefinitely, and grants can be recommended at any pace you choose. Many donors use the DAF as a permanent giving vehicle and name their children as successors.
Disclaimer
This donor-advised fund calculator is provided for informational purposes only and does not constitute tax, legal, investment, or financial advice. Estimates are based on the inputs you enter and on current federal US rules (30% AGI ceiling for appreciated assets, 60% for cash, five-year carryforward); state taxes, the 3.8% net investment income tax, alternative minimum tax, and sponsoring-foundation fees are not modeled. DAF rules, AGI percentages, and tax brackets change over time. Always confirm your specific deduction and carryforward strategy with a qualified CPA or tax advisor before filing.