Since hosting the world’s first internet bond auction in 1997, Grant Street Group has developed and administered web sites used by government entities and financial institutions to conduct auctions and process high-volume, complex financial transactions. We have successfully hosted financial transactions exceeding $12 trillion for over 3,800 issuers throughout the nation.

Today, we provide Software as a Service applications for revenue collection, auctions, and e-payment processing.


Revenue Collection

TaxSys® is a hosted, web-based, tax calculation, collection, billing, cashiering, and distribution system.

Our clients use TaxSys to collect and distribute billions of dollars in tax revenue each year.

Combined with our suite of integrated, special purpose web applications, TaxSys allows our clients to realize significant savings in time and money.

Financial Auctions

Grant Street Group developed the country's first website dedicated to hosting auctions of fixed income and legal instruments. We now host auctions of bonds, notes, certificates of deposit, guaranteed investment contracts, tax certificates, auction rate securities, deeds, and foreclosures.

Use the Auction Portal to view upcoming auctions or use the drop-box to visit a specific site:

Payment Processing

PaymentExpress allows our clients to accept credit card, debit card, and e-check payments over the counter or on-line.

Our company is a Payment Card Industry (PCI) Certified Level 1 service provider - the highest industry security certification level available.

PaymentExpress also features flexible reporting tools and quick and easy resolution of payment issues.