State Unemployment Tax Arizona Tax Rates: The state of Arizona has issued their 2021 Tax Rates and employers should expect significant rate increases. The state has increased the rate schedule resulting in rate increases of 0.03% to 7.75% compared to last year. The Minimum Rate will increase to 0.08%(from 0.05%) and Maximum Rate will be 20.60%(12.85% last year). Please make sure to send ValeU Group any Rate Notices you receive as soon as possible. 2021 Tax Rate Update: As of