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Our mission critically depends on your donation.

Gifts of any amount - from anywhere in the world - are highly appreciated. 
Note for US residents: We are currently awaiting our 501(c)3 IRS determination.

Donate via Credit Card or ACH
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Give One Time or Monthly

Become a sustainer: your monthly contribution will support our work year-round — ensuring that we can maintain our ongoing efforts to make rare disease research possible and efficient. To set up a regular donation, select the “Monthly” option on the form, above. You can cancel or make changes anytime.

Double Your Donation
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Corporate or employer gift match

Many corporations match employee donations to The40%. It's an easy way to double your contribution to accelerate rare disease research and therapy development. Just search for your company here (on the Charity Navigator employee matching search) and follow the instructions to reach out to your employer. Thank you for going the extra mile!

Facebook Donations

We will soon be an approved charity on Facebook. Visit our Facebook page at and use the "Donate" button on the top or on our fundraising posts or campaigns.

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Check via Mail

Please send checks -- payable to The 40 Percent Inc -- to
The 40 Percent Inc.

PO Box 2441, Woburn, MA 01888, USA.

Fundraise for Us

Money raised will automatically be routed to the The40% Inc bank account, and donors receive their receipts, automatically.

Planned Legacy Gifts & Bequests

You can leave a legacy while at the same time supporting the mission of The40%. We are committed to making your gift meaningful to you. 

A bequest through your will allows you to designate a specific dollar amount or a percentage of your estate to The40%. A bequest may reduce the amount of your taxable estate, which may increase the actual amount available to loved ones. Please talk to your attorney or financial advisor to determine the best way to include us in your estate plans.


Contact us at or (617) 800-9552.

Stock and IRA Charitable Giving

Gifts of Stock that have been held for more than 12 months offer two-fold tax savings: a tax deduction for the full fair market value of the stock on the date of the gift and capital gains can be avoided. Please talk to your tax or financial advisor.


Individual Retirement Account (IRA) owners over age 70½ may make a transfer of up to $100,000 per year to qualified charities, including The40% (once a 501(3)c. IRA charitable rollovers are tax-free and not included in adjusted gross income. An IRA charitable rollover may fulfill part or all of your required minimum distribution (RMD). For more information on making an IRA contribution please talk to your tax or financial advisor. 

Personalized Tribute or Memorial Pages

Collect donations "in lieu of gifts," celebrate a milestone, or support someone going through a difficult time. You can personalize a web page with text and a photo.  

Every life should be celebrated and every loved one should be remembered. A way to remember those who have recently passed and a way to provide a dedicated link for friends and family to make a donation in memory of your loved one. You can personalize this page with text and a photo. As long as the page remains active, you can continue to use it to solicit gifts in memory of your loved one. 


To create a personalized Tribute or Memoriam page, contact us at admin@the40percent.o or call us (617) 800-9552 to set up a page for you, or use our donation platform​.

For any questions or comments, please email us at
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