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

Iron Mountain has disclosed Tax Rate across 18 years of filings, most recently posting 15.4% for Q1 2026.

• Tax Rate for Q1 2026 came in at 15.4%, down 3235.0% year-over-year; the trailing twelve-month figure through Mar 2026 was 19.99% (down 1248.0% YoY), and the FY2025 annual result was 27.91%, up 301.0% from the prior year.
• Tax Rate came in at 15.4% for Q1 2026 at Iron Mountain, up from 10.74% 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.
• The 5-year median for Tax Rate is 15.4% (2026), against an average of 12.67%.
• Peak annual rise in Tax Rate reached 7445 bps in 2025, while the deepest fall reached 8804 bps in 2025.
• Iron Mountain's Tax Rate stood at 12.16% in 2022, then soared by 94 bps to 23.6% in 2023, then tumbled by 37 bps to 14.93% in 2024, then retreated by 28 bps to 10.74% in 2025, then soared by 43 bps to 15.4% in 2026.
• The last three Tax Rate figures came in at 15.4% (Q1 2026), 10.74% (Q4 2025), and 16.14% (Q3 2025), per Business Quant data.