Making the Most of a Windfall: How Charitable Bunching, Donor-Advised Funds, and Smart Asset Gifting Work Together
A major financial windfall can be both exciting and overwhelming. Whether it comes from selling a business, exercising stock options, or selling a significant asset, a sudden spike in income often brings an equally significant tax bill.
For charitably inclined families, this moment can also present a powerful planning opportunity. With the right strategy, you can reduce taxes and amplify the impact of your giving—without changing the causes you support.
Let’s look at how one couple used charitable bunching, a donor-advised fund (DAF), and gifting highly appreciated stock to turn a one-time liquidity event into a long-term financial advantage.
The Scenario: A Big Year Changes the Math
Imagine a couple who typically donates $20,000 per year to charity. Like many households, they usually take the standard deduction, since their itemized deductions don’t exceed it in most years.
After years of building a successful business, they sell a portion of their company and receive a large cash windfall, creating a one-time spike in taxable income. At the same time, much of their net worth is tied up in a highly appreciated, concentrated stock position accumulated over many years.
They want to remain generous, reduce taxes, and create a more balanced investment portfolio—but they don’t want to rush decisions or disrupt their long-term plan.
Charitable Bunching: Aligning Giving With a High-Income Year
Rather than continuing to give $20,000 per year as usual, the couple decides to bunch five years of charitable contributions into the same year as the business sale.
Normal annual giving: $20,000
Five years of giving, contributed at once: $100,000
By concentrating their charitable deductions in a high-income year, they are able to itemize deductions and meaningfully offset the income generated by the asset sale—something that wouldn’t have been possible in a typical year.
Why a Donor-Advised Fund Makes This Strategy Practical
The couple doesn’t want to distribute $100,000 to charities all at once. They still want to give $20,000 per year, just as they always have.
A donor-advised fund (DAF) allows them to:
Take a full $100,000 charitable deduction in the windfall year
Invest the funds inside the DAF for potential tax-free growth
Recommend grants to charities gradually over the next five years
This approach separates when the tax deduction occurs from when charities receive the funds, providing flexibility without sacrificing impact.
Gifting Highly Appreciated Stock: Reducing Concentration and Avoiding Capital Gains
The strategy becomes even more powerful when combined with gifting highly appreciated stock instead of cash.
In this case, much of the couple’s wealth is concentrated in a single stock with a very low cost basis. Selling it outright would trigger significant capital gains taxes, making diversification expensive.
Instead, they contribute a portion of that highly appreciated stock directly to their donor-advised fund.
This accomplishes several things at once:
The couple receives a charitable deduction for the full fair market value of the stock
No capital gains tax is owed on the donated shares
The donor-advised fund can sell the stock tax-free and reinvest the proceeds
The couple meaningfully reduces portfolio concentration risk
Meanwhile, the cash received from the business sale can be reinvested into a diversified portfolio aligned with their long-term goals—without being forced to sell concentrated stock at an inopportune time.
The result is a cleaner balance sheet, lower taxes, and a more resilient investment strategy.
The Big Picture: Taxes, Giving, & Diversification Working Together
Here’s how the plan unfolds:
Year of the windfall
Large income from the business sale
Bunched charitable contribution using appreciated stock
Itemized deductions exceed the standard deduction
Capital gains on concentrated stock are avoided
Following five years
$20,000 per year granted to charities from the DAF
Standard deduction used in those years
Cash from the windfall invested into diversified assets
Portfolio risk reduced over time
The couple gives the same amount, supports the same causes, and ends up with a more diversified portfolio—while paying less in taxes.
A liquidity event doesn’t just create a tax obligation—it creates an opportunity.
By combining charitable bunching, donor-advised funds, and the strategic use of highly appreciated assets, families can:
Reduce taxes in high-income years
Simplify giving in future years
Diversify concentrated holdings
Align generosity with long-term financial planning
For those approaching a business sale or other major windfall, thoughtful coordination between taxes, investments, and philanthropy can make a meaningful difference.
Will