Sundack CPA supports businesses, professionals, and investors operating across multiple states. Whether you’re expanding into new markets, hiring remote employees, running an e-commerce brand, or owning property in several jurisdictions, we handle the accounting and tax work that keeps everything aligned.

Multi-state rules create more exposure — more filings, more state-level taxes, more payroll requirements, and more chances to miss something important. We manage those details so your books stay clean, your taxes stay accurate, and your expansion doesn’t come with unnecessary risk.

Our approach to multi-state accounting and tax services is built around clarity, accuracy, and consistency across every state you operate in.

Where Our Multi-State Clients Operate

Most of our clients started in New York, then expanded or relocated. Others came to us already working across several states and needed a CPA team that could manage everything under one roof.

We work with clients in:
Florida, New Jersey, Connecticut, Delaware, Pennsylvania, Illinois, Texas, California, Georgia, North Carolina, Virginia, and more.

Common multi-state scenarios we handle:

NY businesses expanding into nearby states
E-commerce brands selling nationwide
Investors with rental property in multiple states
Service firms hiring remote employees across the U.S.
Companies registering in new states due to nexus triggers
Individuals relocating from New York to states like Florida or Texas
Multi-entity owners with income streams spread across jurisdictions

If your business or investment footprint crosses state lines, we build a structure that keeps the accounting and tax side predictable and compliant.

What We Do for Multi-State Clients

Each state has its own rules. We make sure nothing slips through the cracks.

Multi-State Income Tax Filings

We prepare and coordinate state returns for corporations, S-corps, partnerships, and individuals — making sure income is allocated and apportioned correctly in every jurisdiction.

Nexus, Registration & Compliance

Economic nexus, physical presence, payroll, remote employees, and sales thresholds all trigger registration requirements.
We identify where you owe filings and handle the setup, reporting, and annual requirements.

Sales Tax for E-Commerce & Multi-State Sellers

For online businesses, sales tax rules change constantly.
We manage:

Marketplace sales
Nexus thresholds
Multi-state sales tax filings
Quarterly and annual reporting
Platform reconciliation (Shopify, Amazon, Etsy, etc.)

Accounting for Multi-State Real Estate

Rental income, STRs, long-term properties, and multi-state portfolios all have unique rules.
We handle:

State-specific rental reporting
Depreciation schedules
Local tax requirements
Property transfers and entity strategy

Multi-State Payroll

Remote and traveling employees create sourcing issues.
We ensure payroll taxes, withholdings, and registrations are accurate in every state where employees live or work.

Residency & Relocation Planning

When clients move to states like Florida, Delaware, Texas, or Nevada, we help structure filings correctly while cleaning up remaining obligations in New York or other home states.

Monthly Accounting Across States

No matter where you operate, you get consistent bookkeeping, reconciliations, reporting, and tax planning — not a fragmented system that changes by state.

We keep everything synchronized so nothing gets lost between jurisdictions.

Industries We Support Across States

Our multi-state client base is broad because the challenges are broad.
We support:

E-commerce sellers
Multi-state sales tax, inventory management, marketplace reporting.
Real estate investors & developers
Multi-state portfolios, STR compliance, 1031 exchanges.
Technology, SaaS, and MSP firms
Recurring revenue recognition and nexus management.
Construction & trades
Regional contracting, job costing, subcontractor compliance.
Logistics, trucking & transportation
Multi-state income reporting, payroll sourcing, fuel-related requirements.
Professional service firms
Law firms, architects, consultants, medical practices with cross-state clients.
Franchise operators
Multi-location accounting and franchise reporting.
Content creators & online educators
Mixed revenue sources, multi-state income treatment.

You don’t need to fit into one location for us to support you — if the work spans states, we’re built for it.

Why Clients Choose Us for Multi-State Work

Multi-state accounting exposes weaknesses fast — especially with firms that aren’t used to working across jurisdictions. We handle these situations every day.

Clients choose us because:

You get one CPA team for all states, not different accountants scattered around the country.
Your books stay consistent no matter how many jurisdictions you file in.
We understand nexus, apportionment, allocation, and multi-state payroll — without the guesswork.
We keep you compliant as you scale into new regions.
We don’t get overwhelmed when you say “I operate in eight states.”
You get simple, accurate explanations of what needs to be filed and when.

Our system is built for companies that grow beyond one state and need accounting that can grow with them.

New York-Based, National Capabilities

You don’t need a CPA who’s physically located in every state you operate in — you need one who actually understands how multi-state rules interact.

We handle:

Residency and domicile issues
Nonresident withholding rules
Income allocation across states
Franchise and excise tax filings
Sales tax registration and reporting
Payroll for distributed teams
Out-of-state LLCs and foreign registrations

Most accountants understand one state.
We make sure the entire structure works together.

Our Workflow for Multi-State Clients

Our process is built to avoid gaps and mismatched filings.

Exposure Review

We identify where you have tax obligations, where you should be registered, and which states need filings.

Cleanup & Alignment

We bring books up to standard, correct prior-year mistakes, and align your accounting with multi-state requirements.

Registration & Setup

We handle registrations, payroll setup, sales tax, and state-specific compliance requirements.

Monthly Accounting & Compliance

Reconciliations, financial reporting, sales tax filings, payroll, estimated payments — all handled in one system.

Ongoing Planning

Tax projections, state-by-state strategy, residency planning, entity structuring, and expansion support.

This workflow keeps everything organized, predictable, and coordinated across every jurisdiction you touch.

Get Reliable Multi-State Support

Whether you’re selling across the country, hiring remote workers, managing multi-state rentals, or expanding into new markets, you need accounting that keeps everything aligned.

We deliver multi-state accounting and tax services that simplify compliance, reduce exposure, and make your financial systems more reliable — no matter how many states you operate in.

Multi-State Accounting & Tax Services

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Where Our Multi-State Clients Operate

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