Donate & Upgrade

Igniting cultural imagination around long-term thinking

Donate & Join

Igniting cultural imagination around long-term thinking

Donate by wire, ACH, stock, or cryptocurrency

To donate by wire, ACH, stock, or cryptocurrency, please email

Donate by check

Donations can be mailed to:

The Long Now Foundation
P.O. Box 475668
San Francisco, California 94147

Legacy giving

Legacy giving is long-term thinking in action! For details on bequests and planned giving at Long Now, please email

Tax ID number and fair market value of membership gifts

Your donations and membership dues are tax-deductible to the extent allowed by law, minus the fair market value of any gifts you have received from us. For more detailed information about the tax deductibility of your membership dues, please consult your local tax laws, or speak with a tax professional. The Long Now Foundation is a 501c3 nonprofit organization and our tax identification number is 68-0384748.

The fair market values for most of our goods and services are listed below (please note that some items are not currently available).

Challenge Coin $3
Long Now Membership Card $15
Works in Progress book $20
Brian Eno’s Bells CD $20
Titanium Flask $33
Etched Flask $60
Bottle keep (fill or refill) $90
Rosetta Wearable Disk $150
Interval Tea Club $150
Equation of Time Cam $900

If we can help, please contact us at

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