Income tax; modifying marginal income tax brackets for certain tax years. Effective date.

SB 327 modifies Oklahoma's individual income tax rates for tax years beginning in 2024. It lowers the top marginal tax rate from 5.50% to 4.75% for single filers and married couples filing jointly, while adjusting brackets for lower income levels (e.g., 0.25% on the first $1,000 for singles instead of 0.5%). The bill directly affects Oklahoma residents filing individual income tax returns for 2024 and future years. Key changes include updated tax percentages across all income tiers, with the highest rate applying to income above specific thresholds (e.g., $12,200 for single filers). The bill is currently in committee review and would take effect for the 2024 tax year.