Start Shipping Today

Get Started Today

From Zip Code: 
To Zip Code: 

Zip Code:    

Zip Code:    
GSO Anniversary Infographics

Invoicing & Billing

GSO will send you a billing invoice twice each month on the 15th and the last day of the month. The invoice dated the 15th includes shipments picked up between the first day of the month and the 15th. The second invoice covers shipments picked up between the 16th and the last day of the month.

Note: Billing address change requests are to be faxed to the billing department:

Your invoice itemizes each of your shipments. Itemized details include:

  • Pickup Date
  • Tracking Number
  • Delivery Address
  • Proof of Delivery
  • Reference Field (if provided)
  • Additional charges
  • GSO service type
  • Fuel Surcharge
  • Total charges (including fuel surcharge)

Billing Terms

GSO's terms are net 15 from the date of invoice. Invoices which are outstanding more than 30 days may cause a disruption of service and may be subject to late fees. GSO is not obligated to refund any invoice adjustment or pay any other obligation owed when your GSO account has an outstanding balance. GSO reserves the right, at its sole discretion, to apply any overcharge amounts or other overpayments it agrees are owed to you against the oldest invoices.

Invoice Options

GSO offers Web Invoicing, E-billing, and Consolidated E-billing as preferred invoicing options. GSO can also send invoices through email or Secure File Transfer (FTP). If desired, customers may elect to receive paper invoices, which can be sorted by reference code. Please contact your sales representative for specialized billing requests.

  • Web invoicing — Email notification is sent to user for access to PDF invoice via GSO Customer Portal website. You may also view previous invoices via the portal
  • E-billing —Spreadsheet or txt invoice file sent via email to the user
  • Consolidated E-billing — Spreadsheet with a summary of all requested accounts sent via email to the user
  • Paper — Original paper invoice mailed to user

Payment Options

GSO offers the following payment options:

  • ACH/EFT Payment — Conveniently pay invoices directly from your bank account so there’s no need for a credit card, a paper check, or postage. To take advantage of this option, contact our billing team at 800-322-5555, option 6, or send an email to
  • Automatic Recurring Credit Card Payment — Save time and avoid late payments with our recurring auto-pay option. This option is available to customers whose recurring invoices do not exceed $2,500. When you authorize GSO to maintain a credit card on file, your invoice amounts will be charged to this card at the end of each billing cycle. Major credit cards accepted include American Express, Visa, Mastercard, and Discover. Customers are expected to keep GSO informed of changes to their credit cards, including new cards and updated expiration dates.
  • One-Time Credit Card Payment —We offer the option to make one-time payments for invoice amounts up to $2,500, using either a VISA, American Express, Mastercard, or Discover card. Contact the billing department at 800-322-5555, option 6 to make a payment over the phone.
  • Payments by check — //are accepted and should be mailed to:

    P.O Box 1907
    San Ramon, CA 94583

    Have Questions? Send an email to, and we’ll be happy to help!