Harbor Commons
Sailing's public record, made legible.
Structured IRS Form 990 data for the people who steward sailing organizations.
Build a peer set and share it with your board as a single link — no login, no account.
Commodore
Walk into a budget discussion with comparable data from organizations that actually look like yours — not 'I heard Larchmont does it this way.'
General Manager
See what organizations at your revenue scale report for staffing, dues, and program expenses. Build the comparison, then send the URL to your accountant before the call.
Treasurer / Committee Lead
Sign off on the 990 with something more than a rubber stamp. See how your expense ratios compare to organizations at the same revenue scale before the filing goes out.
1,537
Organizations indexed
49
States covered
14
Filing years available
Last checked against IRS records
August 16, 2026
Last data change
July 26, 2026
Coverage by filing year
Of the 1,537 indexed organizations, the share with at least one filing for each tax year:
Coverage fills in over time because the reporting lags the calendar year. Many organizations file on extension (Form 8868), pushing the effective deadline to November 15. For example, a 2024 calendar-year filing isn't originally due until May 2025, and with an extension, it's pushed to November 2025. Then the IRS takes several months to process and publish it. This means in 2026, the "most recent" available data for a club is often its 2024 filing. Harbor Commons updates continuously as new e-filed returns appear in the IRS public dataset. Learn more →
What is this?
Harbor Commons is a public corpus of IRS 990 filings for sailing organizations — processed and made legible for the practitioners who steward them. GMs, commodores, treasurers, and committee leads use it to understand financial position, ask better questions, and benchmark against genuinely comparable organizations instead of anecdotes.
Not sure what Part IX, Line 23 is on your organization's 990? You don't need to. That's the point. Learn about our methodology →