Animal-Related (D500) IRS Verified DX Registered 990 on File

ZOOLOGICAL SOCIETY OF PHILADELPHIA

EIN: 23-1352298 · PHILADELPHIA, PA 19104-1139 · United States · FY 2025 Data

3 out of 5 52 / 100 Based on 2+ years of filings

Financial strength (30%) 80/100

Reliability (20%) 55/100

Effectiveness (25%) 66/100

Impact (25%) No data yet

Financial data: FY 2025 · Scored 9/13/2026

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Mission Statement

By connecting people with wildlife, the Zoo creates joyful discovery and inspires action for animals and habitats.

Financial Overview — FY 2025

$43.7M

Total Revenue

$44.3M

Total Expenses

$121.5M

Net Assets

547

Employees

Revenue Sources

Expense Breakdown

Program Expense Ratio 74.2%

Fundraising Efficiency 5523.0%

Operating Reserve 32.95x

Liability-to-Asset 10.9%

Revenue Diversification 46.7%

Executive Compensation $1.5M

Compared with Peers

FY 2025

Compared with 55 similar organizations (United States, Animal-Related, $10M–$100M in expenses), FY 2025.

This organization Middle half of peers (P25–P75) Peer median

Ratio	This org	Peer median	Position (P10 → P90)
Program expense ratio Program expenses / total expenses · higher is better	74.2%	82.4%	P10P90	Bottom quarter
Admin expense ratio Management and general / total expenses · lower is better	18.6%	8.2%	P10P90	Bottom quarter
Fundraising expense ratio Fundraising expenses / total expenses · lower is better	7.2%	5.5%	P10P90	Below median
Fundraising efficiency Fundraising expenses / gross fundraising income · lower is better	5523.0%	998.8%	P10P90	Bottom quarter
Operating reserve Months of expenses covered by net assets · higher is better	33.0 mo	26.9 mo	P10P90	Above median
Liabilities to assets Total liabilities / total assets · lower is better	10.9%	7.4%	P10P90	Below median
Revenue concentration Share of revenue from the largest source · lower is better	46.7%	78.7%	P10P90	Top quarter
Revenue growth Year over year revenue growth	0.6%	11.6%	P10P90
Expense growth Year over year expense growth	4.9%	6.7%	P10P90
Surplus margin Surplus as a share of revenue	-1.2%	6.9%	P10P90

Financial History

Year	Revenue	Expenses	Net Assets	Program %	Staff
2025	$43.7M	$44.3M	$121.5M	74.2%	547
2024	$43.4M	$42.2M	$111.8M	76.4%	637
2023	$35.5M	$39.6M	$106.8M	74.3%	490
2022	$54.7M	$34.6M	N/A	—	340

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Organization Details

EIN: 23-1352298
State: PA
City: PHILADELPHIA
ZIP: 19104-1139
Classification: D500
Category: Animal-Related
Rating: 3★
Coverage: A
Last Updated: Aug 2026
IRS Ruling Year: 1859
Foundation Code: 15
Form 990: On File

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CharityAI™ rates charities from 0 to 100 using public filings (IRS Form 990 and the equivalent registries outside the US) together with the information the charity itself provides on DonationX. Ratings are recalculated every quarter, without human bias, and shown as stars.

Four pillars

Financial strength30%

Program expense ratio, fundraising efficiency, operating reserves, liabilities and revenue diversification, compared with similar organizations.

Reliability20%

Standing with the registry, filing history, verification and how complete the profile is.

Effectiveness25%

How much goes to programs and how consistently the organization delivers them.

Impact25%

The outcomes the charity reports on DonationX: people served, cost per service and results.

Stars

★★★★★ 80–100 ★★★★☆ 60–79 ★★★☆☆ 40–59 ★★☆☆☆ 20–39 ★☆☆☆☆ 1–19

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