What is the Right Lifespan for My Philanthropy? | Exploring Family Philanthropy Time Horizons

How long should your family’s philanthropic mission and impact exist? Should you focus your giving efforts while you’re alive to maximize impact? Should your philanthropic mission extend beyond you for a set number of years to be managed by your family or close family advisors? Does your philanthropic strategy lend itself to a perpetual model? What is the overarching purpose of your philanthropy – to maintain your philanthropic impact or to maintain family ties over generations? 

These are significant questions that philanthropic families and their advisors wrestle with as they plan their intended philanthropic strategy, design the supporting governance structure and choose  the appropriate giving vehicle. There aren’t right or wrong answers to these questions. At their core, these questions aren’t just about financial strategy—it’s about purpose, values, and the kind of impact a family wants to have in the world, both now and in the future.

As philanthropic advisors, we often hear reflections like:

“I want to give my money away while I’m alive so I can see the impact.”
“There’s so much need today—shouldn’t I deploy resources as quickly and effectively as I can?”
“I see my philanthropy as long-term societal risk capital. We should plan for both today’s needs and tomorrow’s challenges.”
“Stewarding our foundation in perpetuity will honor our family’s values and keep us connected across generations.”

These aren’t theoretical questions—they’re deeply personal decisions that influence structure, governance, and the legacy of the giving vehicle itself.

A Perpetual Model: Sustaining Long-Term Vision

The norm in the world of family philanthropy is the perpetual model. The founder sets a vision for philanthropic impact that will evolve over time, to be stewarded by his or her family. This more traditional approach involves annual grantmaking at or slightly above the required 5% payout, with an emphasis on long-term investment strategy and family stewardship. Philanthropists adopting this model cite the following benefits:

• The ability to make “big bets” on issues and/or a specific community that requires a sustained commitment beyond one generation.
  
• Preserving capital for future, unforeseen challenges—especially in a changing world.
  
• Supporting long-term leadership, advocacy, and systems-level collaboration in a specific field or region.

Keeping the family engaged across generations through shared values and legacy.

Giving While Living: A Time-Limited Approach

The concept of “Giving While Living” has gained momentum in recent years, with prominent leaders like Yvon Chouinard (founder of Patagonia) and foundations like the Kendeda Fund drawing attention to sunsetting philanthropic vehicles. Philanthropists who choose this route are often motivated by:

• A desire to fund urgent, time-sensitive challenges like climate change, economic inequality, or public health.
  
• The opportunity to personally witness and shape the impact of their giving.
  
• A sense of discomfort with holding accumulated wealth and a belief in deploying capital now.
  
• A conviction that bold, concentrated giving can lead to systemic change.

In this model, families may choose to sunset their giving vehicle within a few years or several decades after inception—allowing for flexibility while maintaining a clear endpoint.

Time Horizons Can Be Flexible

Even within a time-limited model, there’s variation. Some foundations choose a sunset period of 10–20 years. Others may increase their payout rate above the traditional 5%, creating a natural time horizon while maintaining flexibility. Some plan to operate one generation beyond the founder, allowing time for legacy to take root without placing pressure on future generations.

The field is evolving. According to research from Rockefeller Philanthropy Advisors, while the vast majority of foundations have traditionally been set up in perpetuity, more foundations established since 2000 are choosing a time-limited approach, and many perpetual foundations are revisiting the question.

In a 2022 Rockefeller study of 150 philanthropies:

• Leaders cited urgent societal challenges, founder engagement, and next-generation disinterest as key drivers toward sunset strategies.
  
• Notably, all respondents reported satisfaction with their chosen time horizon, whether perpetual or time-limited.

Can you change your mind?

Yes, philanthropic families can explore their time horizon strategy. Time horizon decisions are rarely final—and they don’t have to be. As families grow, rising  generations may move away from the community of origin. Additionally, societal needs evolve. In both cases, revisiting the original assumptions about timing can be healthy and even necessary. If a family wishes to reconsider their time horizon, we recommend the following to make a well informed decision: 

• Understand your governing documents to know the possibilities for changing the time horizon – what was the original intent behind the founder’s philanthropy?
• Undertake a thoughtful discernment process whereby key stakeholders have an opportunity to share their opinions; and 
• Conduct a landscape scan to better understand the current needs of your issue area(s) and community and other funders who may step in to replace your funding over time.

The Ray C. Anderson Foundation undertook a thoughtful 18 month process to evaluate their intended impact on climate philanthropy; ultimately, the family decided to sunset the foundation over the next 5 years.

What’s the Right Answer?

There is no single “right” approach—only what’s right for your family and your goals. The most important thing is to ensure that decisions about time horizons are rooted in your family’s philanthropic mission, values, and intended impact. Rather than starting with when, we encourage families to first reflect on why they give and what they hope to achieve.

From there, questions around timing become clearer:

• Is it more important to preserve a legacy or address an urgent need?
  
• How central is the philanthropic vehicle to keeping your family connected?
  
• Do your issue areas demand a near-term infusion of resources?
  
• Is your next generation ready—and willing—to take the reins?

Emerging Trends and Evolving Norms

Thought leaders such as the National Center for Family Philanthropy and Rockefeller Philanthropy Advisors have noted a growing openness to reassessing time horizons over time. In particular, the social reckonings of 2020–2021 as well as current changes in federal funding for the nonprofit sector are catalyzing many philanthropists to move faster, give more, and rethink legacy as something that happens during their lifetime—not just after.

Final Thoughts

Our advice: let your mission and values lead your decision making around your giving vehicle’s time horizon. Be adaptable to changing conditions—in your family, your community, and your areas of focus. A family foundation that remains clear on its purpose, yet open to evolution, is best positioned to make a meaningful and enduring impact.

About Grant Philanthropic Advisors:
We’re an independent firm helping clients to focus and maximize their philanthropy—in turn, strengthening the fabric of our communities. Founded in 2019, we help donors move from responsive patterns of giving by assisting clients to identify values and become more strategic in their philanthropy. Our goal is to help donors to become more effective as change-makers.

We work with foundations (large and small staff teams), donor advised fund holders, multi generational families, individuals, philanthropy supporting organizations and corporations to design philanthropic strategies.