When startup founders prepare for a major liquidity event, charitable tax planning is often treated as an afterthought once the acquisition closes. However, waiting until after the business sale can leave millions in capital gains tax savings on the table. In a recent episode of the QSBS, Solved podcast, host Brady Weller spoke with Karin Prangley, Managing Director and Senior Wealth Planner at Brown Brothers Harriman, about integrating philanthropy into a Qualified Small Business Stock strategy before an exit.
At a glance
According to the U.S. Small Business Administration, roughly 89% of startup founders and business CEOs donate to charity, making pre-exit charitable giving both a philanthropic priority and a smart wealth management strategy.
The first step in pre-exit tax planning is evaluating your baseline QSBS tax exposure. If your C-Corporation sale falls under the $10M federal QSBS exclusion cap and meets the five-year holding period requirement, you owe zero federal capital gains tax and do not need complex pre-exit structures. However, if your startup exit exceeds your single exemption or you have maxed out non-charitable QSBS trust stacking, pre-exit charitable contributions can significantly offset taxable gains.
For straightforward philanthropic giving, tech founders increasingly choose a Donor-Advised Fund over a private foundation. Donating private C-Corp shares to a private foundation limits your charitable tax deduction strictly to your cost basis, which is nearly zero for most startup founders. Contributing appreciated private stock to a Donor-Advised Fund before a sale provides a full fair-market-value tax deduction, eliminates capital gains tax on the stock appreciation, ensures donor anonymity without public IRS Form 990 filings, and avoids the 5% annual minimum distribution mandate of private foundations. Timing this pre-exit stock donation is critical. Founders must transfer shares after the company reaches a mature valuation, but before signing a binding letter of intent that would trigger the IRS assignment of income doctrine.
For entrepreneurs seeking a triple benefit of immediate tax deductions, capital gains tax deferral, and retained cash flow, a Charitable Remainder Unitrust delivers exceptional return on investment. Prangley illustrated this with a hypothetical Maryland startup founder facing a $20M exit, leaving $10M in taxable proceeds above her personal QSBS exemption. Paying a 33% combined federal and state capital gains tax rate reduces that taxable portion to $6.7M. By transferring those $10M of QSBS shares into a four-year Charitable Remainder Unitrust before the sale, the founder secures a $1M upfront charitable tax deduction, receives $10.1M in cumulative annuity payouts over four years, and directs a $1.4M remainder gift to her Donor-Advised Fund. To protect against a delayed acquisition, estate planners often use a Net Income Makeup Charitable Remainder Unitrust that flips into a standard payout trust only when the liquidity event closes.
Because IRS regulations governing QSBS trust stacking and charitable remainder trust accounting involve complex legal gray areas, founders should assemble an advisory team of a QSBS CPA, an estate planning attorney, and a wealth manager well before an exit.
