Iron Mountain (IRM) Tax Rate (2009 - 2026)

Iron Mountain has disclosed Tax Rate across 18 years of filings, most recently posting 12.24% for Q2 2026.

• In Q2 2026, Tax Rate rose 7250.0% year-over-year to 12.24%; the TTM figure through Jun 2026 stood at 13.83% (down 4419.0% YoY), while the FY2025 annual figure was 27.91%, up 301.0% from the prior year.
• Tax Rate came in at 12.24% for Q2 2026 at Iron Mountain, down from 15.4% in the prior quarter.
• In the past five years, Tax Rate ranged from a high of 78.83% in Q2 2023 to a low of 60.26% in Q2 2025.
• Average Tax Rate over 5 years is 12.64%, with a median of 15.16% recorded in 2026.
• The largest YoY upside for Tax Rate was 7445 bps in 2025 against a maximum downside of 8804 bps in 2025.
• Over 5 years, Tax Rate stood at 12.16% in 2022, then soared by 94 bps to 23.6% in 2023, then sank by 37 bps to 14.93% in 2024, then retreated by 28 bps to 10.74% in 2025, then grew by 14 bps to 12.24% in 2026.
• Per Business Quant data, the three most recent Tax Rate figures were 12.24% in Q2 2026, 15.4% in Q1 2026, and 10.74% in Q4 2025.