Smarter workforce management.

  Time & labor management
Human resources
Payroll & tax compliance
 Garnishment administration
  Paperless processing
Learn about our services

We've been serving clients since 1958.








Friendly, helpful payroll experts here to serve you.

You can reach a specialist in minutes on the phone. We're always here to help, answer questions, and solve problems.

Our team specializes in going the extra mile.

Meet Our Team

Employment Law Compliance

Learn about our services

Southwestern Payroll News

ACH Client Responsibility Reminder

This notice is to remind you of your responsibility to fund your bank account at least two business days prior to any check date for which Southwestern is to debit for employee direct deposit amounts.

Read more

irs tax information

Oklahoma Issues New OK-W-4

Recently released by the Oklahoma Tax Commission: “The Oklahoma Tax Commission has introduced an Oklahoma-specific withholding certificate in response to changes in federal tax law. Historically, the OTC used the IRS form W-4; however, with the implementation of the Federal Tax Cuts and Jobs Act

Read more

National Grilled Cheese Day!

April 12th, we honored our favorite childhood sandwich. Today, we had to celebrate! We gathered several different kinds of cheese, bread (including gluten-free for those who needed it!), lunch meat, bacon, and many fun toppings.

Read more