Summary
- What it is: The charitable donation bunching strategy concentrates multiple years of donations into a single tax year to maximize tax deductions
- How it works: Bunch 2-3 years of charitable contributions in one year to exceed the standard deduction, then take the standard deduction in off years
- 2025 standard deductions: $15,750 (single), $23,625 (head of household), $31,500 (married filing jointly)
- Key tool: Donor-advised funds (DAFs) allow you to bunch contributions for tax benefits while still supporting charities regularly
- Who benefits: Taxpayers whose itemized deductions fall just below the standard deduction threshold
- Status: IRS-approved, completely legal tax planning strategy
If you’re charitably inclined and frustrated that your donations don’t seem to make a dent in your tax bill, you’re not alone. With the higher standard deduction in place since 2018, millions of Americans have found their charitable contributions no longer provide any tax benefit. But there’s a smart strategy that can help: bunching.
Why Your Charitable Donations May Not Lower Your Taxes
Here’s the issue: charitable contributions are only tax-deductible if you itemize your deductions. But with the 2025 standard deduction set at:
- $15,750 for single filers
- $23,625 for heads of household
- $31,500 for married couples filing jointly
…many taxpayers find that their total itemized deductions—including charitable giving, mortgage interest, and state and local taxes—don’t exceed these amounts. When that happens, you’re better off taking the standard deduction, which means your charitable contributions provide zero tax benefit.
How the Bunching Strategy Works: Step-by-Step
The bunching strategy is elegantly simple: instead of donating the same amount each year, you concentrate multiple years’ worth of donations into a single tax year. This creates a spike in your itemized deductions, allowing you to exceed the standard deduction and claim a tax benefit. In the alternating “off” years, you donate little or nothing and simply take the standard deduction.
A Real-World Example
Let’s say you’re a married couple who typically donates $10,000 to charity annually. Your other itemized deductions (mortgage interest, property taxes, etc.) total $10,000.
Traditional approach:
- Total itemized deductions: $20,000 ($10,000 charity + $10,000 other)
- Standard deduction for 2025: $31,500
- Result: You take the standard deduction. Your charitable giving provides no tax benefit.
Bunching approach:
- Year 1: Donate $30,000 (three years’ worth)
- Total itemized deductions: $40,000 ($30,000 charity + $10,000 other)
- You itemize and deduct $40,000
- Tax benefit from the extra $8,500 over standard deduction
- Years 2 & 3: Donate little or nothing
- Take the standard deduction of $31,500 each year
Over three years, bunching gives you significantly more in deductions than spreading donations evenly.
How to Make Bunching Work Practically
The big question: if you’re bunching three years of donations into one year, does that mean your favorite charities get nothing in the off years? Not necessarily.
Enter the Donor-Advised Fund (DAF)
A donor-advised fund is the secret weapon that makes bunching practical. Here’s how it works:
- Bunching year: Contribute your large, bunched amount to a DAF
- Claim your deduction: You get the full tax deduction in that year
- Distribute over time: You recommend grants from the DAF to your chosen charities annually, maintaining your regular giving pattern
Your charities continue receiving steady support, but you’ve optimized your tax benefits by concentrating the contributions into one tax year.
Important Rules to Remember
Timing Matters
Charitable contributions are deductible in the year they’re paid. To claim a deduction for 2025, your contribution must be made by December 31, 2025.
Keep Good Records
For any donation of $250 or more, you must obtain a contemporaneous written acknowledgment from the charity. Keep these records with your tax documents.
AGI Limitations
You can generally deduct cash contributions to public charities up to 60% of your adjusted gross income (AGI). If your bunched contribution exceeds this limit, don’t worry—the excess can be carried forward for up to five years.
Substantiation Requirements
Make sure you have proper documentation for all contributions. For smaller donations, canceled checks or credit card statements work. For larger ones, you need written acknowledgments from the organizations.
Who Benefits Most from Bunching?
The bunching strategy is most valuable for taxpayers who:
- Have itemized deductions that fall just below the standard deduction
- Make regular charitable contributions of several thousand dollars annually
- Have other itemized deductions (like mortgage interest or state/local taxes) that get them partway to the standard deduction threshold
- Can afford to make larger contributions in bunching years without cash flow problems
Is Bunching Right for You?
To determine if bunching makes sense, add up your typical itemized deductions:
- Charitable contributions
- Mortgage interest
- State and local taxes (capped at $10,000)
- Medical expenses exceeding 7.5% of AGI (if applicable)
If your total is within striking distance of the standard deduction, bunching could deliver meaningful tax savings. A tax professional can help you model different scenarios and determine the optimal bunching schedule.
Key Takeaways: Making Bunching Work
Before implementing a bunching strategy, consider these action steps:
- Calculate your baseline: Add up your typical annual itemized deductions to see how close you are to the standard deduction threshold
- Determine your bunching cycle: Most taxpayers benefit from a 2-3 year bunching cycle
- Consider a donor-advised fund: This allows you to maintain regular charitable giving while bunching for tax purposes
- Plan ahead: Charitable deductions must be paid by December 31 to count for that tax year
- Consult a professional: A tax advisor can help you optimize timing and ensure compliance with AGI limitations
The Bottom Line
The bunching strategy is a completely legal, IRS-recognized method of maximizing the tax benefit of your charitable giving. It doesn’t require you to be wealthier or give less to charity—it simply requires smarter timing.
In an era of higher standard deductions, bunching has become an essential tool for charitably minded taxpayers who want to make their giving count, both for the causes they support and for their tax bills.
Frequently Asked Questions
What is charitable donation bunching? Charitable donation bunching is a tax strategy where you concentrate multiple years of charitable contributions into a single tax year to exceed the standard deduction threshold, allowing you to itemize deductions and receive tax benefits. In alternating years, you take the standard deduction.
What is the standard deduction for 2025? For 2025, the standard deduction is $15,750 for single filers, $23,625 for heads of household, and $31,500 for married couples filing jointly.
How much can I deduct for charitable contributions? You can generally deduct cash contributions to public charities up to 60% of your adjusted gross income (AGI). Any excess can be carried forward for up to five years.
What is a donor-advised fund (DAF)? A donor-advised fund is a charitable giving account that allows you to make a large contribution in one year (claiming the immediate tax deduction) while recommending grants to charities over multiple years. This makes bunching practical while maintaining regular support to your favorite causes.
Is the bunching strategy legal? Yes, bunching is completely legal and recognized by the IRS. It’s simply a matter of timing your charitable contributions strategically to maximize tax benefits.
How many years should I bunch? Most taxpayers bunch 2-3 years of donations together, but the optimal bunching period depends on your specific itemized deductions and how far you need to go to exceed the standard deduction.
Do I need receipts for charitable donations? Yes, you need documentation for all charitable contributions. For donations of $250 or more, you must obtain a contemporaneous written acknowledgment from the charity.
Can I bunch donations to any charity? You can bunch donations to any IRS-qualified 501(c)(3) charitable organization. However, the 60% AGI limitation applies to cash contributions to public charities; lower limits apply to private foundations and non-cash contributions.
