G-Invoicing at GSA

Government invoicing, or G-Invoicing, is the federal government’s common platform for intra-governmental buy and sell transactions, also called intra-governmental transactions, or IGT.

G-Invoicing gives federal trading partners one shared system to:

• Create and store interagency agreements
• Create orders for goods and services
• Track performance against those orders
• Transfer funds between agencies

What G-Invoicing does

Because both trading partners use the same system, you will see fewer accounting differences related to invoicing, timing, and accruals. This improves the quality and reliability of buy and sell data and supports more accurate financial management.

G-Invoicing is not an accounting system, and it is not used for payments to commercial vendors. It is only for transactions among government entities.

The system supports federal financial management responsibilities described in 31 U.S.C. 3512(b) and 3513. It was built using Federal Intragovernmental Data Standards, which can also help you build software interfaces that connect to G-Invoicing.

If you buy from us, here’s what changes

If you buy goods or services from us, your day-to-day experience stays mostly the same. You will continue to use our sales portals and applications to place your requests.

Behind the scenes, our customers move through three steps:

1. Set up an agreement. Our agency business lines create an agreement that establishes the business relationship with each customer. In G-Invoicing, this agreement is called a General Terms and Conditions, or GT&C. Both partners must approve it.
2. Place orders. Then orders can be placed either directly in G-Invoicing or through a GSA sales portal. We automatically uploads sales portal data to G-Invoicing.
3. Track performance and transfer funds. We record performance and use G-Invoicing to transfer the funding for goods and services.

How G-Invoicing works with Pegasys and IPAC

G-Invoicing works alongside our current systems rather than replacing them.

1. Pegasys. G-Invoicing does not replace Pegasys, our financial system. Our systems continue to send data to Pegasys, which connects to G-Invoicing to upload and download data on agreements, orders, performance, and fund settlement.
2. IPAC. The Treasury’s Intergovernmental Payment and Collection, or IPAC system is being phased out over time. G-Invoicing will be used to transfer funding between agencies.

Find your business line and timeline

The Treasury deadline for adopting G-Invoicing was October 1, 2022. GSA rolled it out in phases by business line to allow time to update its financial, ordering, and billing systems.

All our business lines and services use G-Invoicing to invoice and collect funding, and we also use it when buying from another federal agency.

Get help

Questions about G-Invoicing with us? Start with your GSA point of contact, or email G-Invoicing@gsa.gov for general questions.