Long Island Accounting & Tax Services
Long Island businesses rely on stable accounting, clear reporting, and predictable tax outcomes. Whether you operate in Nassau County or Suffolk County, you’re dealing with payroll rules, sales tax requirements, industry-specific regulations, and cash-flow challenges that demand accurate financial systems.
Sundack CPA supports companies, professionals, and investors throughout Long Island. We organize your books, manage your filings, plan your tax strategy, and give you reliable financial data you can use to run your business. From established firms to growing contractors, medical practices, real estate investors, and service companies, we provide the accounting and tax work that keeps your operation steady year-round.
At Sundack CPA, your success is our priority. We’re not just expert CPA's —we’re your financial partners, committed to helping you grow and thrive.
Ready to see the Sundack CPA difference? Connect With Us Now!
Questions? Let's Connect
How We Support Businesses in Long Island
Long Island companies depend on accurate numbers and consistent reporting. You’re operating in a competitive region with rising costs, fluctuating labor needs, and complex compliance requirements. Our team manages the accounting, payroll, and tax work that prevents errors, avoids surprises, and supports clean decision-making.
We build financial systems that support day-to-day operations and long-term growth. Clean books, timely filings, and structured planning create stability — the exact thing most Long Island businesses don’t get from typical accounting firms.
At Sundack CPA, your success is our priority. We’re not just expert CPA's —we’re your financial partners, committed to helping you grow and thrive.
Ready to see the Sundack CPA difference? Connect With Us Now!
Questions? Let's Connect
Long Island–Specific Accounting and Tax Issues
Businesses in Nassau and Suffolk face unique operational and regulatory challenges. We handle these issues daily.
Sales Tax and Quarterly Filings
Restaurants, retailers, contractors, and service providers often deal with regular sales tax filings. We handle registrations, calculations, monthly and quarterly filings, and reconcile POS systems accurately.
Payroll Compliance for Local and Remote Teams
Long Island employers need accurate payroll withholding, unemployment filings, new-hire documentation, and year-end reporting. If you have remote workers in other states, we coordinate multi-state payroll as well.
Cash-Flow Management for Seasonal and Service Businesses
Many Long Island companies — especially contractors, landscapers, trades, and service providers — deal with seasonal revenue shifts. We organize the books so you can plan ahead and stay financially stable.
Real Estate & Rental Property Accounting
Long Island has an active rental and investment market. We manage depreciation, expense tracking, income categorization, and tax treatment for both long-term and short-term rentals.
Entity Structure and S-Corp Decisions
As revenue grows, the right entity structure matters. We review your situation and determine whether an S-Corp, partnership, or multi-entity structure is beneficial.
Contractor & 1099 Compliance
Nassau and Suffolk contractors often hire subcontractors and vendors. We manage job costing, 1099 preparation, expense tracking, and compliant reporting.
At Sundack CPA, your success is our priority. We’re not just expert CPA's —we’re your financial partners, committed to helping you grow and thrive.
Ready to see the Sundack CPA difference? Connect With Us Now!
Questions? Let's Connect
What We Do for Long Island Clients
Accounting & Bookkeeping
We keep your books accurate with monthly reconciliations, clear financial statements, and organized records built for planning, lending, and clean reporting. Your numbers stay consistent and usable year-round.
Tax Planning
We build practical tax strategies for federal, state, and local obligations. This includes quarterly estimates, entity considerations, and forward-looking planning that reduces exposure and keeps you prepared.
Tax Preparation
We file business and personal returns for corporations, partnerships, and individuals. Many Long Island clients have rental properties or multi-state activity — all handled accurately and on time.
Payroll Management
We run payroll, manage withholdings, handle filings, and keep your records compliant with New York requirements. Local and remote employees are both supported.
Sales Tax Compliance
We manage registrations, monthly or quarterly filings, POS reconciliation, and documentation for restaurants, retailers, contractors, and service companies.
Tax Resolution & Audit Support
We respond to IRS and New York State notices, fix past issues, and represent you through audits, assessments, and compliance reviews.
Get Started
Whether you’re based in NYC, Long Island, or operating in several states, you need accounting and tax support that stays consistent everywhere your business goes.
We help you stay organized, compliant, and prepared.
Industries We Serve in Long Island
Contractors and home service companies
Medical and dental practices
Real estate investors and landlords
Restaurants and hospitality businesses
Retail and local service firms
Technology and SaaS companies
Family-owned and multigenerational businesses
Consultants and professional services
E-commerce sellers
We understand the financial realities and operational challenges across Nassau and Suffolk.
At Sundack CPA, your success is our priority. We’re not just expert CPA's —we’re your financial partners, committed to helping you grow and thrive.
Ready to see the Sundack CPA difference? Connect With Us Now!
Questions? Let's Connect
Why Long Island Businesses Work With Sundack CPA
Long Island businesses choose us because they need dependable accounting and clear tax strategy. We provide:
Accurate books
Predictable month-end reporting
Year-round planning
Clean, timely filings
Strong communication
Audit and notice support
A financial system that grows with your business
Our work is built on clarity and consistency.
At Sundack CPA, your success is our priority. We’re not just expert CPA's —we’re your financial partners, committed to helping you grow and thrive.
Ready to see the Sundack CPA difference? Connect With Us Now!
Questions? Let's Connect
Get Accounting and Tax Support in Long Island
Long Island businesses need clean accounting and proactive tax planning. We keep your books organized, your filings accurate, and your financial systems ready for growth.
At Sundack CPA, your success is our priority. We’re not just expert CPA's —we’re your financial partners, committed to helping you grow and thrive.
Ready to see the Sundack CPA difference? Connect With Us Now!