OLS is now proud to utilize PNC Bank’s Payer Express services to receive ACH and credit card payments from our clients and customers!

In order to make a payment, please follow the payment portal link below to access our payment portal. You will need to know the invoice number and amount due. If you would like to pay by credit card a 3% transaction fee will need to be added to your current invoice, so please reach out to Accounting for an updated copy. Accounting at 301-296-3103 or

If you do not have the invoice number or amount, or have general questions, please do not hesitate to contact Accounting!


To receive confirmation of your payment and disclosures electronically, you will need connection to the Internet, an active email address, and a computer with an operating system capable of supporting one of the below applications:

  • Microsoft Internet Explorer 8 or higher
  • Safari 5 or higher
  • Chrome 23 or higher
  • Firefox 17 or higher
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