GiveRate / All records / Forbes 400 (Sept. 2026) / David Duffield
David Duffield
5–10%
David Duffield has given an estimated 5–10% of current net worth ($11.5B), based on Forbes' philanthropy score.
- GiveRate
- 5–10%
- Net worth
- $11.5B
- Stated lifetime giving
- Not stated
- Forbes 400
- #132 · Business software · Incline Village, Nevada
- Status
- Source-reported range
- Sources
- Forbes 400 profile · Sept. 2026
The math
Forbes philanthropy score 3 of 5: lifetime giving is 5–10% of current net worth. The range is Forbes' own banding; GiveRate shows it as published.
Profile
- Age
- 85
- Residence
- Incline Village, Nevada
- Industry
- Technology
- Source of wealth
- Business software
- Self-made
- Yes
- Role
- Cofounder, Workday
- One-year change
- $12.8B (#91) in Sept. 2025 to $11.5B (#132) in Sept. 2026, a drop of 10%.
What the range means in dollars
Forbes gives David Duffield a philanthropy score of 3 out of 5, meaning lifetime giving equals 5% to 10% of current net worth. On a $11.5B fortune, that implies lifetime giving of roughly between $575M and $1.1B. 38 of the 400 share this score, 315 score lower and 30 score higher.
For scale: 5% to 10% of a $50,000 household income would be $2,500 to $5,000.
Giving on record
He has spent more than $900 million supporting animal welfare, education and other causes, mostly via his family foundation and Maddie's Fund.
From the Forbes profile (Sept. 2026).
Others in Technology
- Elon Musk: Under 1% · $908B
- Jeff Bezos: 1–5% · $378B
- Larry Page: Under 1% · $278B
- Michael Dell: 1–5% · $263B
- Sergey Brin: 1–5% · $256B
- Mark Zuckerberg: 1–5% · $212B
Others in Nevada
- Miriam Adelson & family: 1–5% · $33.5B
- Nancy Walton Laurie: Under 1% · $17.2B
- Don Hankey: Under 1% · $10.5B
- Jay Chaudhry: Under 1% · $9.7B
- Andrew Cherng: Under 1% · $8.3B
- Peggy Cherng: Under 1% · $8.3B
Questions
How much has David Duffield given to charity?
Forbes scores David Duffield 3 of 5 for philanthropy, meaning lifetime giving of 5% to 10% of net worth, roughly between $575M and $1.1B on a $11.5B fortune.
What is David Duffield's net worth?
Forbes estimates $11.5B as of September 2026, ranking #132 on the Forbes 400.
What is David Duffield's GiveRate?
5–10%. GiveRate is lifetime giving as a share of wealth, built from published Forbes figures. See giverate.org/methods/ for the method.
GiveRate is an estimate built only from the published figures above. Wealth and giving totals are themselves estimates. See methods. Spot an error? Request a correction. See all Forbes 400 (Sept. 2026) · Open in the interactive rankings · Calculate your own GiveRate