Third Act is reimagining what elderhood can mean for millions of Americans. Donate today to help protect our climate and strengthen our democracy.

Third Act is a national effort to organize older Americans helping protect our climate and safeguard our democracy. We’re stepping up and using our strengths as a generation to take collective action for a more livable future—building a skilled, joyful, committed base of volunteers along the way.

A small full-time staff does the organizing and training for thousands of Third Actors across the country, focusing our purpose and passion. Dozens of prospective working groups are waiting to be developed, launched, and supported. Over forty thousand people took action with Third Act last year. We could double that in 2023 with enough help! So if you have some money to offer, we will put it to good use.

Here’s a snapshot of how your contribution can help:

  • $180 ($15 per month) can pay for food & materials for an in-person event or training
  • $600 ($50 per month) can help cover costs for a working group’s demonstrations over several months
  • $1,200 ($100 per month) can pay a trainer to educate hundreds of volunteers about effective campaigning, base-building, or local media outreach
  • $3,000 ($250 per month) can pay for a compelling 2-3 minute video about our vision that can help bring more people into the movement
  • $6,000 ($500 per month) can pay for a month’s work by one of the organizers supporting new groups

By registering to make monthly contributions, you help Third Act to budget and plan for the future. However, anything you can give at any time will help! 

You can use the form here to make a donation that is NOT tax-deductible.

Your contributions to Third Act here help us build grassroots power. This helps us come out on the sharper end of political discourse for our political and electoral work, and work with key partners. If you’d prefer to send a check you can address it to Third Act Initiative and send it to the following address:

Third Act
PO Box #445
Nassau, NY 12123

To give a tax-deductible donation, please see our first FAQ below.

Other FAQs detail ways to donate via donor advised funds (DAFs), via gifts of stock, bequests and legacy planning, and through your business’ association with 1% for the Planet.


Right here! Third Act remains fiscally sponsored by the Sustainable Markets Foundation, a 501(c)(3) organization. Donations here help fund our non-electoral work, and are fully tax deductible.

You can make a tax-deductible contribution below:

Or if you would prefer to send a tax-deductible check by mail, you can make it payable to Sustainable Markets Foundation with “Third Act” in the memo line, and post it to:

Sustainable Markets Foundation (for Third Act)
45 West 36th Street, 6th Floor
New York, NY 10018-7635

If you would like to donate to Third Act through your Donor Advised Fund (DAF), you can do so via Sustainable Markets Foundation, our 501c3 fiscal sponsor. Here’s the information you’ll need:

  • EIN number (tax ID number): 13-4188834.
  • Address: Sustainable Markets Foundation (for Third Act), 45 West 36th St., 6th Floor, New York, NY 10018-7635.

It is usually possible to include “Third Act” in a memo or Grant Designation line. Any further questions should be directed to . Thanks!

Third Act can accept gifts of stock. Please send an email to for instructions about how to begin a transfer.

Yes. We would be honored to work with you to create a lasting legacy in support of a fair and stable planet. You can include us as a beneficiary in your will or estate plans. A bequest is easy to arrange and is not payable until you pass away, so it does not affect assets or cash flow during the your lifetime. It is also private and revocable, since you can change provisions in the will or trust at any time, and it is not made public until death.

If you’re interested in or planning on making Third Act a beneficiary in your will or estate plans please email

Third Act is a recognized partner of 1% for the Planet. If your business is interested in donating through that program, you can find us in their non-profit directory, or by writing directly to Gabi Freeda at

Third Act Initiative participates in election advocacy to make sure we can “name names,” make endorsements, and come out on the sharper edge of political discourse during election cycles. It also allows us to participate in key efforts to get-out-the-vote for races that matter.

It is prohibited to use tax-deductible donations to fund this vital piece of Third Act’s work, so a portion of our staff time, software, and digital platforms must be accounted for with “c4 dollars,” or non-deductible revenue.

Ways to get involved

Join our mailing list

The best way to start your third act is by signing up for our mailing list. We'll update you on our campaigns, actions you can take, and other relevant news and insights.

Take action

You have the power to be a catalyst for change. We organize different actions, online and in-person. Once click can make a difference!

Find a Working Group

Working Groups are volunteer run groups organized by affinity or by geographic location. We encourage these Working Groups to carry out organizing, communication and campaigns.

Attend an event

We host workshops, community calls, and facilitated conversations each month that build skills, deepen interest, and get everyone working together on the big problems of our time.