Kostelanetz LLP

Kostelanetz LLP has represented individuals, businesses, and institutions for nearly 80 years in high-stakes disputes, government investigations, regulatory matters, and complex domestic and international tax planning issues. The firm’s practice includes tax controversy, tax fraud defense, white-collar criminal defense, trust and estate planning, transactional tax planning, and government investigations. The firm also represents clients in sensitive and complex internal investigations, as well as matters involving commercial litigation and government procurement and contracting.

Our attorneys draw on decades of experience advising clients on administrative proceedings, litigation, and domestic and international tax compliance matters. Many have previously served in senior positions with the Internal Revenue Service, the U.S. Department of Justice, the Securities and Exchange Commission, and federal and state prosecutors’ offices. Several attorneys have also served as federal judicial law clerks and hold advanced degrees in taxation.

Kostelanetz LLP attorneys regularly contribute articles and commentary to publications including The CPA Journal, Tax Notes, The Journal of Tax Practice & Procedure, and Law360. Their work addresses developments in tax law, civil and criminal tax enforcement, transactional tax planning, estate and trust planning, commercial litigation, and White-Collar Criminal Defense & Government Investigations. Attorneys at the firm also write and speak on issues involving IRS audits, IRS criminal investigations, state and local enforcement actions involving alleged tax evasion, and enforcement activity by the Department of Justice, the SEC, FinCEN, and other regulatory agencies.

Several partners teach at nationally recognized law schools, including NYU and Georgetown. Firm attorneys also present CLE and CPE programs on tax, litigation, and legal ethics topics and are frequently retained as consultants or witnesses in tax controversy matters.

Kostelanetz LLP is committed to providing clients with direct access to partners and senior attorneys throughout each engagement. The firm emphasizes practical, cost-conscious representation tailored to the needs of each matter and has the depth and flexibility to scale its legal teams as client needs evolve.