What's the Difference Between Regular and Supplemental Runs

This table describes how regular and supplemental payroll runs calculate federal taxes, based on the default settings.

For this payment type

And this process and pay option

Taxes regular runs this way

Taxes supplemental runs this way

Standard

Process and pay with other earnings

Annualized

N/A

Standard

Process and pay with other earnings

Annualized, Aggregation

N/A

Standard

Process separately but pay with other earnings

Annualized (Standard Earnings) + Tiered Flat Rate (Supplemental Earnings)

N/A

Standard

Process separately and pay separately

Annualized (Standard Earnings) + Tiered Flat Rate (Supplemental Earnings) for two separate pays

N/A

Supplemental

Process and pay with other earnings

Annualized, Aggregation

Tiered Flat Rate

Supplemental

Process separately but pay with other earnings

Annualized (Standard Earnings) + Tiered Flat Rate (Supplemental Earnings)

Tiered Flat Rate

Supplemental

Process separately and pay separately

Tiered Flat Rate

Tiered Flat Rate

Supplemental

Process separately and pay separately

Annualized (Standard Earnings) + Tiered Flat Rate (Supplemental Earnings) for two separate pays

Tiered Flat Rate

For further info, see How Supplemental Earnings Are Calculated in a Regular Run in the US in the Help Center.