In Oklahoma, workers’ comp benefits can last up to 156 weeks, with the potential for a 52-week extension if more time is needed to reach maximum medical improvement. Each state has varying formulas and ways of determining how long workers’ comp should last. Additionally, each state has different rules about total compensation and length of benefits. In Oklahoma, for example, temporary total disability benefits max out at 70% of the employee’s weekly wage or 100% of the state’s average weekly wage.