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  • Trusted Advisor

    We develop trusted relationships and deliver outstanding client experiences.

  • Teamwork

    We are your strategic business partners committed to your success.

  • Quality

    We provide timely and meaningful advice specifically tailored for each client.

  • Knowledge and Expertise

    We understand our clients challenges and develop effective solutions.

Welcome to CostaRothbort

We are a premier Long Island based public accounting firm serving businesses and individuals in the areas of tax, assurance, accounting, business consulting, and forensic accounting.   We have earned our reputation by providing first-class accounting service and distinctive advice to our clients.
We do this through our exceptionally talented people who are creative problem-solvers and make client service their number one priority.
All of our service teams are comprised of professionals, who immerse themselves in their chosen industry niches, become leaders in the related trade groups and extend their expertise to our clients in these areas.
Our accounting team understands the industry-specific issues that often determine business success and we’re here to share our insights with you.

Tax Planning and Preparation

We are your complete tax planning and preparation resource. Minimizing your tax liability is our main objective and that begins with consistent planning. Read More . . . 

Accounting and Bookkeeping

When providing business accounting and bookkeeping services, one of our primary goals is for our clients to have timely and accurate accounting records Read More . . .

Business Consulting & Advisory Services


When encountering business challenges, the perspective of someone who knows your business and industry is invaluable.
Read More . . .

Wealth Management Services

CostaRothbort provides wealth management to our clientele through consulting and advanced planning services.
Read More . . .

Litigation Support & Forensic Accounting

Corporate disputes, misappropriation of assets, and fraud are unfortunately a part of today’s business environment. Read More . . .