Bunching Donations: Maximizing Your Giving and Tax Deductions

"Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity" — 2 Corinthians 9:7 (KJV)

Quick Answer

The standard deduction ($13,850 single, $27,700 married in 2024) means most donors can't deduct charitable gifts. But by "bunching"—concentrating giving in certain years and using a DAF—you can deduct large amounts while spreading actual giving over time. This captures tax benefits that traditional year-by-year giving misses.

The Deduction Problem

A married couple wants to give $15,000/year to charity (meaningful amount).

Without bunching:

• Year 1: Donate $15,000
• Standard deduction: $27,700
• Charitable deduction: $0 (under standard deduction)
• Tax benefit: $0
• They give $15,000 but get no deduction

With bunching via DAF:

• Year 1: Contribute $60,000 to DAF (4 years' worth), donate $0
• Year 1 standard deduction: $27,700
• Charitable contribution: $60,000
• Itemized deduction: $60,000 (exceeds standard)
• Tax saved: $60,000 × 24% = $14,400
• DAF then distributes $15,000/year to charities for 4 years
• Net: Same giving pattern, but $14,400 captured in taxes

The difference: $14,400 that traditional giving never captured.

How Bunching Works

Mechanics:

1. Identify a year where you might have unusual income (bonus, stock sale, business profit)
2. In that high-income year, contribute large amount to DAF
3. Get deduction in high-income year (saves taxes at your highest rate)
4. DAF distributes charitably over next 3-5 years at normal pace
5. In low-income years, you take standard deduction (no deduction needed)

Example: Freelancer with variable income

Result: Four years of giving, but deduction captured only in the high-income year. Total tax savings: $14,400 ($15,000 × 4 × 24% = $14,400).

If she'd given $15,000 each year, she'd capture $0 in deductions (standard deduction covers it all).

When to Bunch: Identifying Opportunity Years

Opportunity 1: Business owner with variable income

• Good year: $200,000 profit
• Low year: $80,000 profit
• In good year: contribute $100,000 to DAF, take deduction
• In low years: distribute from DAF, no deduction (standard deduction covers)

Opportunity 2: High-bonus job or commission income

• You get a $50,000 bonus in year 1
• Following years are normal
• Year 1: Contribute $100,000 to DAF (bonus + savings)
• Years 2-4: DAF distributes $25,000/year

Opportunity 3: Stock market gains or home sale

• You sell investment property with $100,000 gain
• Or you have large capital gains from stock appreciation
• That year: Contribute $100,000 to DAF
• Bunching captures deduction in the year of the gain

Opportunity 4: Retirement timing

• You retire this year and know income will drop
• Contribute $150,000 to DAF before retiring
• Take deduction while still in high bracket
• Distribute from DAF in retirement at lower income (when deductions less valuable anyway)

Opportunity 5: Life event years

• Inheritance received (income spike)
• Inheritance → Contribute to DAF in year received
• Capture deduction while income is high

Advanced Mechanics: Maximizing the Deduction

Rule 1: Cash contributions deductible up to 60% of AGI

• AGI $100,000 → Can deduct up to $60,000 in cash to DAF
• Excess can carry forward 5 years

Rule 2: Appreciated property deductible up to 30% of AGI

• Better to give appreciated stock than cash (avoids capital gains)
• Deduction limit is 30%, not 60%

Rule 3: Carry-forward for excess gifts

• Contributed $70,000 to DAF but AGI is only $100,000 (60% limit is $60,000)
• $10,000 can be deducted this year; $10,000 carries forward next year

Example: Maximizing a Bonus Year

Scenario: You get a $100,000 bonus, and your normal AGI is $150,000.

Without bunching:

• Total AGI: $250,000
• You want to give $40,000 to charity
• Charitable deduction: $40,000 (under itemized threshold for you)
• Tax benefit: Maybe $0 (standard deduction applies)

With bunching:

• Contribute $100,000 to DAF in the bonus year
• Total charitable deduction: $100,000
• Itemized deduction: $100,000 + mortgage interest + property taxes = $150,000 total
• Exceeds standard deduction ($27,700); you itemize
• Tax savings: $100,000 × 24% = $24,000
• DAF then distributes $40,000/year for 2-3 years
• Net: You've captured $24,000 in tax benefits from your giving

The DAF as the Engine

A DAF makes bunching work because:

1. It accepts large donations in one year
2. It holds the money
3. It distributes as recommended over time
4. You get the deduction immediately (year of contribution)
5. Distributions happen when you're ready

Without a DAF, bunching is hard. You'd have to write big checks to charities, losing the tax-timing benefit.

With a DAF, you:

• Contribute in high-income year (get deduction)
• Hold funds in DAF (growing tax-free)
• Recommend distributions over time (when you're ready)
• Adjust recommendations as priorities change

Real-Life Application: A Case Study

Sarah's situation:

• Married, joint filing
• Normal income: $120,000 (both working)
• Desired giving: $15,000/year
• This year: Sold rental property with $80,000 gain

Year 1 (high-income year):

• Salary: $120,000
• Capital gain (home sale): $80,000
• Total AGI: $200,000
• Standard deduction: $27,700
• Contribution to DAF: $100,000 (20% down from their gross, captured in the bonus year)
• Itemized deduction: $100,000 (mortgage interest + property taxes ~$30,000 + charit donation $100,000 = $130,000)
• Exceeds standard; itemize
• Tax savings: $100,000 × 24% = $24,000

Years 2-5:

• Salary: $120,000 (no capital gains)
• Standard deduction: $27,700 (take standard, don't itemize)
• DAF distributes $25,000/year to charities
• Sarah gets no tax deduction for these distributions (they're below standard deduction)
• But that's fine; she already captured the tax benefit in year 1

Net result over 5 years:

• Total given: $125,000 ($25,000/year)
• Tax saved: $24,000 (captured entirely in year 1)
• Actual cost: $101,000 (after tax benefit)
• Giving pace is constant (doesn't feel variable)
• Tax efficiency is maximized

Bunching Without a DAF: Alternatives

If you don't want to use a DAF, bunching is harder but possible:

Method 1: Direct to charitable vehicles

• In high-income year, donate large amount directly to charity
• Get deduction that year
• Charity holds the money; you've given
• Downside: You lose control of timing

Method 2: Private foundation (expensive)

• Contribute to foundation in high-income year
• Get deduction
• Foundation distributes over time
• Cost: $2,000-$5,000 to establish; annual 990-PF filing (~$1,500/year)
• For large estates, worthwhile; for most, DAF is simpler

Method 3: Charitable remainder trust (complex)

• Fund trust in high-income year
• Get deduction
• Trust pays you income; remainder goes to charity
• Complex, illiquid, expensive
• Rarely used by typical donors

DAF is almost always the best choice for bunching (simple, cheap, flexible).

Psychological and Spiritual Benefits

Beyond tax savings, bunching offers psychological benefits:

Intentionality: You're not giving haphazardly. You're planning: "This is a giving year. I'm strategic about this."

Commitment: Contributing $100,000 to a DAF is a deliberate covenant. You're signing up to generosity.

Family involvement: A family DAF makes bunching a shared decision: "We're putting $100,000 here. How should it flow to charities we care about?"

Legacy: A DAF can be perpetual. Your bunching in a high-income year creates a giving fund that benefits causes for decades.

2 Corinthians 9:7 says: "Every man according as he purposeth in his heart." Bunching embodies "purposing"—intentional, strategic, joyful giving.

Practical Steps

Step 1: Identify if you have an opportunity year coming

• Big bonus expected?
• Stock sale planned?
• Inheritance coming?
• Retirement timing?

Step 2: Calculate your bunching benefit

• High-income year: AGI $200,000
• Charitable desire: $15,000/year for 5 years = $75,000 total
• Bunching: Contribute $75,000 to DAF in high-income year
• Tax bracket: 24%
• Tax savings: $75,000 × 24% = $18,000

Step 3: Open a DAF

• Choose provider (Fidelity Charitable, Schwab, etc.)
• Contribute in the high-income year

Step 4: Plan distributions

• Family meeting: "Over the next 5 years, how should this $75,000 be distributed?"
• Annual decisions: $15,000/year to different charities

Step 5: Execute and track

• Each year, recommend distributions
• Enjoy the giving without tax burden

Sources

• Charitable deduction limits — IRS Publication 526
• Bunching strategy — Tax Foundation research
• DAF bunching applications — Fidelity Charitable
• 2 Corinthians 9:7 exegesis — Matthew Henry's Commentary
• Charitable giving tax optimization — American Association of Individual Investors

Bunching isn't gaming the system; it's stewarding the system wisely. By concentrating giving into strategic years, you capture deductions that traditional giving misses—and give more generously overall.