51night060806Tax-exempt status 


The International Dark-Sky Association (IDA) is a tax-exempt non-profit organization under Section 501(c)(3) of the United States Internal Revenue Code of 1987  (Federal Identification Number 74-2493011). IDA receives its funding from several sources, including membership dues, donations, and grants.



Deductibility of donations

If you live in the U.S., you may deduct your donation to IDA from your federally-taxable income when filing your itemized tax return. Please consult the Internal Revenue Service or a tax professional for more information.


Federal tax returns


IDA’s federal tax returns (Form 990, Return of Organization Exempt from Income Tax) for fiscal years 2001 through 2013 are available for public viewing:

2013 Federal Tax Return (Form 990)

2012 Federal Tax Return (Form 990)

2011 Federal Tax Return (Form 990)

2010 Federal Tax Return (Form 990)

2009 Federal Tax Return (Form 990)

2008 Federal Tax Return (Form 990)

2007 Federal Tax Return (Form 990)

2006 Federal Tax Return (Form 990)

2005 Federal Tax Return (Form 990)

2004 Federal Tax Return (Form 990)

2003 Federal Tax Return (Form 990)

2002 Federal Tax Return (Form 990)

2001 Federal Tax Return (form 990)


Membership dues


As a membership-based organization, IDA receives most of its funding from your membership dues.  Membership dues — including gift memberships — are considered tax-exempt donations in the U.S.

Join IDA


IDA welcomes your donations to continue our mission against light pollution. Donations not in exchange for goods or services are considered tax-exempt in the U.S.

  • Unrestricted donations support the organization in general, covering everything from everyday operating expenses to expenses urgently needed for unforeseen circumstances.
  • Restricted donations support programs specified by the donor, such as public outreach or the International Dark Sky Community program.
  • Memorial contributions recognize loved ones by supporting the causes in which they believed. Memorial contributions may also be used to establish awards in honor of loved ones.
  • Planned gifts, which may be restricted or unrestricted, are living memorials that help IDA grow and plan for the future.

Donate to IDA

To see if your employer provides matching gifts, please view our current list of employers that provide matching gift donations.

Corporate Partners

Corporate partnership is open to any organization that subscribes to the IDA mission statement. Benefits include advertisement in the award winning Nightscape magazine and sponsorship opportunities at our Annual General Meeting and Conference. For more information, please, This email address is being protected from spambots. You need JavaScript enabled to view it.

For more information click here >>

Recent Grants

National Park Service Cooperative Agreement: IDA signed a cooperative agreement with the National Park Service (NPS) in December 2010 to upgrade lighting in nine national parks. Innovative lighting designs will be installed in 2012 that will protect wildlife and nocturnal habitats while providing safety and security to evening visitors. Under the terms of the agreement, IDA will conduct lighting analyses and develop lighting plans for each park; order dark sky friendly lighting fixtures; and assist with the installation of the lighting. The nine parks participating in the project are: Canyon De Chelly (Arizona); Chiricahua (Arizona); Homestead (Nebraska); Mojave (California); Redwood (California); Cedar Breaks (Utah); Craters of the Moon (Idaho); Morristown Historical Park (New Jersey); and Tallgrass Prairie (Kansas).

IDA will also develop best practice outdoor lighting design standards for parks and natural environments.

The work will be completed in 2013.

The Fred Maytag Family Foundation. In January 2012, the Fred Maytag Family Foundation awarded a $25,000 grant to IDA for its Dark Sky Parks and Protected Areas Program (DSPPA). This program will expand the work that IDA began under the National Park Service Cooperative Agreement to other national and state parks that would like to upgrade their lighting but don’t have funds to do so. The program will also work with parks, both in the US and around the world, that are interested in applying for anInternational Dark Sky Places (IDSP) designation.