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Napa County Historical Society

Napa, California · EIN 94-2690901 · Arts, Culture & Humanities · tax-exempt since 1981

F

Charity Clarity grade F (score 36.4 of 100), based on the Form 990 for the year ended May 2026.

Graded against 44,780 arts, culture & humanities nonprofits with revenue $500K–$2M filing the same form. A = top 10%, B = next 20%, C = middle 40%, D = next 20%, F = bottom 10%.

What goes into the grade

MeasureThis charityScore (0–100)
ReservesMonths of spending covered by unrestricted net assets.44.9 months28
GovernanceBoard independence, key policies and audit, per the 990.45% of practices45
Margin stabilityHow steady the surplus or deficit is year to year.5
Revenue spreadHow much revenue rests on one type of income.78% from one source36
Filing recordOn-time, complete filings, year after year.100%100
Program spendingSelf-reported by the filer.75.2%not scored
Management costsShare of spending.7.9%not scored
Cost to raise $1Fundraising cost per dollar given.$0.07not scored

Scores compare this charity with its peer group; 100 is best. How Charity Clarity rates charities.

Year by year

2016201720182020202120222023202420252026grey: revenue · green: spending
Year endedFormRevenueSpendingSurplusNet assetsMonths of spendingStaffGrade
May 2026Form 990$705K$265K$441K$991K44.93F
May 2025Form 990$210K$253K−$43K$626K29.73C
May 2024Form 990$218K$227K−$9,192$1.01M53.53D
May 2023Form 990$196K$228K−$32K$530K27.93C
May 2022Form 990$163K$181K−$18K$574K38.12C
May 2021Form 990$124K$161K−$37K$552K41.12D
May 2020Form 990$265K$291K−$26K$521K21.44D
May 2018Form 990$138K$153K−$15K$571K44.82D
May 2017Form 990$83K$135K−$52K$577K51.42D
May 2016Form 990$527K$204K$323K$629K37.12D

From the organisation’s own IRS filings. “Months of spending” is total net assets divided by a month of that year’s spending. A blank grade means that year was not rated.

Read the filings

Every figure here comes from the returns this charity filed with the IRS. These sites show the full returns and more about the organisation:

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