Westlake (WLK) Tax Rate (2010 - 2026)

Westlake's Tax Rate history runs 17 years deep, the most recent figure standing at 17.37% for Q1 2026.

• In Q1 2026, Tax Rate rose 2031.0% year-over-year to 17.37%; the TTM figure through Mar 2026 stood at 9.13% (down 2724.0% YoY), while the FY2025 annual figure was 7.89%, down 2313.0% from the prior year.
• Tax Rate was 17.37% for Q1 2026 at Westlake, down from 19.61% in the prior quarter.
• In the past five years, Tax Rate ranged from a high of 80.21% in Q4 2024 to a low of 4.8% in Q2 2025.
• Historically, Tax Rate has averaged 20.23% across 5 years, with a median of 19.18% in 2023.
• The sharpest annual moves came in 2024 and 2025: Tax Rate surged 6748 bps in 2024, then tumbled 6060 bps in 2025.
• A 5-year view of Tax Rate shows it stood at 18.69% in 2022, then tumbled by 32 bps to 12.72% in 2023, then soared by 530 bps to 80.21% in 2024, then plunged by 76 bps to 19.61% in 2025, then retreated by 11 bps to 17.37% in 2026.
• The last three Tax Rate figures came in at 17.37% (Q1 2026), 19.61% (Q4 2025), and 0.39% (Q3 2025), per Business Quant data.