Unparalleled Legal & Accounting Expertise - Arbitrage Compliance Specialists, Inc. ("ACS") is an independently owned firm specializing in Arbitrage Rebate and post-issuance compliance. Born out of PricewaterhouseCoopers, ACS' founders have been at the forefront of every advance and reform of the Tax Code since 1986. Clients Who Choose Us, Stay With Us - The reason is simple: we take the time to develop client relationships to better understand and serve each clients' unique needs. Our calculations are performed by CPAs, reviewed by our in-house tax attorney and have been error free for 30 years. ACS clients benefit from working with an experienced, friendly and accessible staff that takes the legwork out of Arbitrage Rebate, leaving you with one less thing to worry about. ACS' portfolio includes: •Over 99% client retention rate •Over 1,600 municipal clients with debt portfolios of all sizes •Over 17,500 debt issues •Over $63 Billion in total outstanding principal value •Over 51,000 calculations performed since 1986