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.

• On a quarterly basis, Tax Rate rose 2031.0% year-over-year to 17.37% in Q1 2026; TTM through Mar 2026 was 9.13%, a 2724.0% decrease from a year earlier, with the FY2025 full-year figure at 7.89%, down 2313.0% from the prior year.
• Tax Rate retreated to 17.37% in Q1 2026 per WLK's latest filing, from 19.61% in the prior quarter.
• Across five years, Tax Rate topped out at 80.21% in Q4 2024 and bottomed at 4.8% in Q2 2025.
• The 5-year median for Tax Rate is 19.18% (2023), against an average of 20.23%.
• Across the five-year window, Tax Rate jumped 6748 bps in 2024 and tumbled 6060 bps in 2025, its largest moves.
• Year by year, Tax Rate stood at 18.69% in 2022, then sank by 32 bps to 12.72% in 2023, then soared by 530 bps to 80.21% in 2024, then slumped by 76 bps to 19.61% in 2025, then retreated by 11 bps to 17.37% in 2026.
• Per Business Quant, the three latest WLK Tax Rate figures stand at 17.37% (Q1 2026), 19.61% (Q4 2025), and 0.39% (Q3 2025).