Hello there, smpri.
The 1.5x rate for an employee's standard hourly wage must be manually calculated and updated whenever their pay changes, as there is no other way around for this.
It is not possible to automatically align the overtime rate with an employee's base pay rate. However, you can manually adjust the overtime amount while processing payroll or by editing the paycheck after it has been created. For more details, please refer to this article: Track Qualified Overtime in QuickBooks.
Overall, both the 1.5x overtime rate and its alignment with base pay require manual adjustments whenever an employee's pay changes, either during payroll or after paycheck creation.
If you have further questions, feel free to reply below.