Charitable Bunching for Financial Advisors: How It Works With DAFs, Which Clients Fit, and When to Raise It

Many clients who give every year get no tax benefit for it. The 2026 standard deduction is $32,200 for married couples filing jointly, according to the IRS. A household giving five figures a year can still fall short of that line, so the gifts never show up on the return.

Charitable bunching for financial advisors turns unrewarded giving into a tax deduction through a timing decision. The client contributes two or more years of planned giving to a donor-advised fund (DAF) in one year, itemizes that year, and takes the standard deduction in the years between. This guide covers the advisor’s side: how bunching works with a DAF, which clients are good candidates for bunching, how to find them with data you already have, when to raise bunching with a client, and where it stops working.

Start with the point clients most often get wrong. The contribution into the DAF is what counts for the deduction, not the grant to a charity. A grant can be recommended at any time and does not affect the timing of the deduction.

How does bunching charitable deductions with a donor-advised fund work?

The client makes one larger DAF contribution covering several years of giving, deducts it in the year of the contribution, and recommends grants to their charities on their usual schedule afterward. AEF’s Unlocking Generosity report lays out three levels:

• Standard approach. Modest annual gifts never clear the standard deduction, so they add no tax benefit.
• Bunching. Several years of gifts go into one year to clear the standard deduction. The client takes the standard deduction in the years that follow.
• Super bunching. A larger one-time contribution offsets a single high-income event, such as a large bonus or a Roth IRA conversion.

A Worked Example

Take a hypothetical client, a married couple with $300,000 of adjusted gross income (AGI), about $18,000 a year in other itemized deductions, and $12,000 a year in charitable giving. Starting in 2026, itemizers can deduct only the charitable giving above 0.5% of AGI, under Section 70425 of the One Big Beautiful Bill Act (OBBBA). For this couple, that floor is $1,500 (0.5% of $300,000).

Giving annually, the couple’s itemized deductions reach only $28,500, so they never itemize. Bunching adds $20,300 in deductions over three years, worth roughly $4,900 in federal income tax at a 24% marginal rate. Their charities still receive $12,000 a year in grants from the DAF, a steady rhythm that answers how often clients should grant from a donor-advised fund after bunching.

Raising bunching proactively also helps you keep the DAF inside your relationship, rather than having clients who open a DAF without their advisor.

NOTE: This is a hypothetical example for illustrative and educational purposes only, assuming 2026 federal rules and no state income tax. It does not constitute tax, legal, or investment advice. Results will vary, and clients should consult their own qualified tax advisors for advice on their situation.

Which clients are bunching candidates?

The clients who are the best candidates for charitable bunching give a steady amount to causes every year that, combined with their other deductions, lands near or below the standard deduction. Look for:

• Giving on autopilot. The same gifts to the same organizations, with the standard deduction taken every year.
• A high-income year ahead. A large bonus or a planned Roth conversion makes the deduction worth more.
• Long-held appreciated stock. Contributing shares avoids capital gains tax on the appreciation, a major driver of DAF funding according to Unlocking Generosity.
• Clients near the line. Households that itemize some years and not others lose deductions in the off years.

Use the Tub, Tank, and Tower Framework

Research led by Daniel Heist at Brigham Young University sorts DAF donors into three timing patterns known as “tub, tank, and tower,” named for water containers that represent how long money sits in the fund:

• Tub donors fill and empty their DAFs quickly, granting within about one to two years.
• Tank donors hold larger lump sums, often tied to liquidity or life events, and grant them out over two to 10 years.
• Tower donors build for the long term, typically using their DAFs for 10 years or more.

Bunching shifts a tub donor’s annual checks into a tank pattern: one lump-sum contribution, granted out over several years. Start the conversation with clients who give like tub donors, writing the same checks every year.

How to Spot Candidates in Data You Already Have

Check the following:

• Last year’s return. A standard deduction alongside regular giving is the clearest signal.
• Account activity. Recurring transfers to charities show the pattern and its size.
• Tax projections. An income spike next year points to bunching or super bunching.
• Unrealized gains reports. Long-held, low-basis positions are natural funding assets.

When should you raise bunching with a client?

Ideally mid-year, when you run tax projections, but Q4 still works if the contribution reaches the DAF before the deadlines below. By June or July, most of the year’s income is known, and there are still five or six months to decide how many years of giving to fund, choose which assets to contribute, and complete the transfer before the December deadlines. The exact timing will depend on the situation. Some clients benefit from donating earlier in the year, while others find that opening a DAF now and funding it later works better.

How to Raise It Without Making It a Tax Pitch

Lead with the client’s goals, then the mechanics. Clients who hear only the tax angle register it as tax planning rather than charitable advice, which is the heart of the charitable planning gap. Ask, “Which organizations do you expect to keep supporting over the next three years?” A specific answer makes bunching a better way to do what the client already plans. There are many questions to ask clients about their charitable giving that can open the conversation naturally.

If the Conversation Lands in Q4: AEF’s 2026 Deadlines

For the 2026 deduction, the contribution must reach the DAF in time. These are the key dates from AEF’s Giving Season 2026 calendar:

For asset-specific deadlines, including securities and wires, see AEF’s Giving Season 2026 hub.

For bunching, a late-year account is rarely a problem: the deduction comes from the 2026 contribution, and accounts opened after November 20 can begin granting in 2027, when the grants were planned anyway.

Where does charitable bunching break down?

Bunching stops making sense when the numbers are too small, the contribution outruns AGI limits, or the client’s giving depends on things a DAF grant cannot provide. Check these first:

• The gain is too small. If several years of giving barely clears the standard deduction, run the numbers before changing anything.
• AGI limits. Cash gifts to a DAF are deductible up to 60% of AGI, a limit Section 70425 of OBBBA made permanent, and long-held appreciated assets up to 30% per IRS Publication 526. Excess deductions carry forward five years, but they only help in years the client itemizes, which bunching makes less frequent. Size the contribution to fit this year’s limit.
• The off-year deduction excludes DAFs. From 2026, non-itemizers can deduct up to $1,000 in gifts ($2,000 for joint filers), but DAF contributions do not qualify under Section 70424 of OBBBA. Small cash gifts made directly to charities in off years can still capture it.
• Benefits and control. A DAF grant cannot pay for gala tickets, memberships, charity auction items, or other personal benefits for the client that are more than incidental. Incidental benefits, such as items of negligible value (coffee mugs, key chains, etc.) or public recognition, are acceptable. The client also cannot recommend grants to a charity that is controlled by the client, a family member, or a related entity.
• Receipts. The client’s charitable contribution receipt comes from the DAF sponsor, not from each charity. Make sure you know how to avoid a double tax receipt. 
• The commitment. A DAF contribution is irrevocable, so the client must be comfortable committing several years of giving at once.

Frequently Asked Questions About Charitable Bunching

Quick answers to the most common questions about bunching.

Does a client have to grant the money in the same year to get the deduction?

No. The deduction is set by the date of the contribution into the DAF. Grants can be recommended in later years without changing when the deduction applies.

How many years of giving should a client bunch?

Usually, two or three. Enough to clear the standard deduction by a meaningful margin, within the client’s AGI limits, and no further ahead than the client is comfortable committing.

Does bunching still work under the 2026 tax rules?

Yes, and for many clients the case is stronger. The 2026 standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly, so steady annual giving often never clears it. Bunching concentrates several years of giving into one itemizing year, so the new 0.5% of AGI floor applies once rather than in every year the client itemizes.

Put a Client’s Annual Giving to Work

Find the client who gives the same amount every year and takes the standard deduction. Raise bunching at your next review and open a DAF while there is time to fund it well.

If you have a client in mind, start the DAF process with AEF or talk with our team about their situation. For more research on advisor-led giving, download Unlocking Generosity: The Advisor’s Role in Inspiring Purpose and Impact.

This content is for educational and marketing purposes only and is not tax, legal, or financial advice. Tax outcomes depend on individual circumstances and current law. Invested assets may rise or fall in value, and growth is not guaranteed. Falls in value of the invested assets, if any, are not insured against loss. Investment options and asset acceptance are determined solely by American Endowment Foundation, Inc., its affiliates, agents, successors and assigns (collectively “AEF”). Please consult your own tax, legal, and financial advisors before making charitable, legal, or financial decisions.