Costco Wholesale (COST) Tax Rate (2009 - 2026)

Costco Wholesale's Tax Rate history runs 18 years deep, the most recent figure standing at 25.21% for Q1 2026.

• Quarterly Tax Rate fell 97.0% year-over-year to 25.21% in Q1 2026, while the trailing twelve-month figure through Feb 2026 was 24.97% (up 24.0% YoY) and the FY2025 annual result came in at 25.13%, up 77.0% from the prior year.
• Tax Rate was 25.21% for Q1 2026 at Costco Wholesale, up from 22.53% in the prior quarter.
• Across five years, Tax Rate topped out at 27.1% in Q3 2023 and bottomed at 22.03% in Q4 2024.
• A 5-year average of 24.99% and a median of 25.36% in 2022 frame the typical range for Tax Rate.
• Annual changes were most pronounced in 2024 — Tax Rate sank 399 bps — and 2025, when it soared 409 bps.
• Costco Wholesale's Tax Rate stood at 22.94% in 2022, then rose by 7 bps to 24.55% in 2023, then slipped by 10 bps to 22.03% in 2024, then gained by 2 bps to 22.53% in 2025, then climbed by 12 bps to 25.21% in 2026.
• Business Quant data shows COST's Tax Rate at 25.21% in Q1 2026, 22.53% in Q4 2025, and 25.64% in Q3 2025.