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

Costco Wholesale has reported Tax Rate for 18 years, with the latest figure at 25.21% in Q1 2026.

• For the quarter ending Q1 2026, Tax Rate fell 97.0% year-over-year to 25.21%; the trailing twelve-month figure through Feb 2026 stood at 24.97% (up 24.0% YoY), and the FY2025 full-year result was 25.13%, up 77.0% from the prior year.
• Tax Rate for Q1 2026 stood at 25.21%, up from 22.53% in the prior quarter.
• The five-year high for Tax Rate was 27.1% in Q3 2023, with the low at 22.03% in Q4 2024.
• Historically, Tax Rate has averaged 24.99% across 5 years, with a median of 25.36% in 2022.
• Annual changes were most pronounced in 2024 — Tax Rate slumped 399 bps — and 2025, when it soared 409 bps.
• Costco Wholesale's Tax Rate stood at 22.94% in 2022, then grew by 7 bps to 24.55% in 2023, then retreated by 10 bps to 22.03% in 2024, then increased by 2 bps to 22.53% in 2025, then gained by 12 bps to 25.21% in 2026.
• The last three Tax Rate figures came in at 25.21% (Q1 2026), 22.53% (Q4 2025), and 25.64% (Q3 2025), per Business Quant data.