Please consider making a tax-deductible donation today—or
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join our community of long-term thinkers from around the world.
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The Long Now Foundation is a 501c3 nonprofit organization
and our tax identification number is 68-0384748.
All donations, minus the fair market
of any goods and services, are tax-deductible.
Please don't forget to ask your employer about any charitable
gift matching opportunities.
We gladly accept one-time donations via
Checks can be mailed to:
The Long Now Foundation
P.O. Box 475668
San Francisco, CA 94147
We also accept ACH, cryptocurrency, stock, and wire transfers.
for account transfer details.
If you would like to include The Long Now Foundation in your
will, please contact
learn more about our gift acceptance policy and our suggested
If you have any questions, please contact us directly at