Accounting Events

COST Spring Conference 2027

The next COST Spring Conference is Apr 19–21, 2027 at Fairmont Chicago Millennium Park in Chicago, IL. It's run by Council On State Taxation.

COST 2027 Spring Conference / Audit Session details →Official site ↗

Upcoming dates

Past editions

About COST Spring Conference

COST's spring state and local tax conference paired with an audit session.

Who it's for: In-house state and local tax professionals.

SunOct 25–28, 2026Happening now

Vertex Exchange 2026

The Cosmopolitan of Las Vegas · Las Vegas, NV

  • Tax
  • Sales & indirect tax
  • ERP & finance systems