About us

We're invested in your success.

Since 1956, Sabel & Oplinger, CPA, PC has been a trusted partner for families, individuals, and businesses across Eastern Long Island. Rooted in the heart of the East End, we’re not just accountants—we’re neighbors invested in your success. Our team of experienced advisors is dedicated to understanding your financial landscape and delivering thoughtful, tailored solutions that make a meaningful difference.

Through decades of growth and change, our commitment to personalized care and a deep connection to our community has remained steadfast. Whether advising a family-owned business, guiding a nonprofit’s mission, or simplifying complex real estate tax structures, our expertise is grounded in one clear goal: helping you achieve yours.

what we do

Expertise in one clear goal: helping you achieve yours.

Individual & Business Tax Service

Condominiums & Co-operatives

Estate, Trust, & Tax Planning

Not-For-Profit Organizations

Accounting & Assurance

Expert, year-round tax planning and preparation designed to help you minimize liabilities, maximize cash flow, and achieve peace of mind for your personal or business finances.

Tailored financial guidance and compliance support to help boards and associations manage their responsibilities efficiently and confidently.

Compassionate, customized strategies to protect your assets, reduce tax burdens, and ensure your estate plans align with your family’s goals.

Dedicated financial services to empower your nonprofit’s mission, ensuring fiscal compliance while supporting operational growth.

Comprehensive accounting solutions, from audits to consultations, provide clarity, control, and confidence in your financial decision-making.

Individual & Business Tax Service

Expert, year-round tax planning and preparation designed to help you minimize liabilities, maximize cash flow, and achieve peace of mind for your personal or business finances.

Condominiums &
Co-operatives

Tailored financial guidance and compliance support to help boards and associations manage their responsibilities efficiently and confidently.

Estate, Trust, & Tax Planning

Compassionate, customized strategies to protect your assets, reduce tax burdens, and ensure your estate plans align with your family’s goals.

Not-For-Profit Organizations

Dedicated financial services to empower your nonprofit’s mission, ensuring fiscal compliance while supporting operational growth.

Accounting & Assurance

Comprehensive accounting solutions, from audits to consultations, provide clarity, control, and confidence in your financial decision-making.

what makes us different

Southampton’s Oldest Accounting Firm Serving the East End Since 1956
Entrepreneurial Consultants and Advisors For Broad-based and Diversified Clientele​
Expertise, Experience,
Commitment, and Integrity​