1. State and Local Tax: the Core Components
State and local tax systems comprise several distinct revenue streams, each with its own rules and filing requirements. The primary categories include income tax, property tax, sales tax, and various specialized levies. From a practitioner's perspective, the interaction between these taxes and federal tax treatment often creates planning opportunities and compliance risks that merit early attention.
| Tax Type | Typical Rate Range | Primary Jurisdiction | Key Compliance Risk |
| State Income Tax | 0% to 13.3% | State of residence or source | Nexus determination and filing deadlines |
| Local Property Tax | 0.3% to 2.5% of value | County or municipality | Assessment appeals and exemption qualification |
| Sales Tax | 4% to 10% | State and local | Nexus, collection, and remittance timing |
| Business Taxes | Varies widely | State or locality | Apportionment and nexus analysis |
State income tax remains the largest SALT burden for most individuals. Rates vary dramatically, from zero in states like Texas and Florida to over 13 percent in California. Determining which state has the right to tax your income depends on where you work, where your business operates, and sometimes where you are domiciled. This nexus question is where disputes frequently arise.
2. State and Local Tax: Income Tax Nexus and Residency
A state may tax your income if you are a resident, work within that state, or derive income from sources located there. Residency is typically the strongest nexus, but many states also assert tax authority over nonresidents who earn income within their borders. The determination of residency itself can be contested, especially when individuals move, maintain multiple homes, or work remotely.
Domicile and Residency Standards
Most states define residency based on domicile, which is your true, fixed home to which you intend to return. Domicile differs from mere presence; you can be a resident of a state even if you spend part of the year elsewhere. Courts examine factors such as where you maintain a home, where family members live, where you vote, and where you conduct business. In practice, these disputes rarely map neatly onto a single rule, and the burden often falls on the taxpayer to document intent and physical presence patterns.
Nonresident Income and Source Rules
Even if you are not a state resident, that state may tax income you earn within its borders. This includes wages earned while working in the state, business income from operations there, and sometimes rental income from property located there. The source of income determines which state has the right to tax it. A New York court or the New York Department of Taxation and Finance may examine whether income was truly earned within the state or merely received there, and delayed or incomplete documentation of income source can complicate the resolution of such disputes.
3. State and Local Tax: Property Tax and Assessment
Property tax is typically the largest SALT expense for homeowners and represents a significant ongoing obligation. Each county or municipality assesses property value and applies a local tax rate to generate revenue. Property tax disputes often center on assessment accuracy and eligibility for exemptions.
Assessment and Appeal Procedures
Your local assessor determines the assessed value of your property, which forms the basis for your annual tax bill. You have the right to challenge an assessment if you believe it is incorrect. Most jurisdictions offer an administrative appeal process before any judicial review. The timeline for filing an appeal is strict, and missing the deadline can waive your right to challenge that year's assessment. Documentation of comparable property sales, recent appraisals, and property condition is critical to a successful appeal.
Exemptions and Special Programs
Many jurisdictions offer property tax exemptions or reductions for certain categories of property owners, including senior citizens, disabled persons, veterans, and agricultural land. Eligibility requirements are specific and vary by jurisdiction. Qualifying for an exemption requires timely application and proof of status. The exemption may reduce your tax bill significantly, but you must maintain eligibility year to year and reapply if required by local law.
4. State and Local Tax: Sales and Use Tax Obligations
Sales tax is imposed on retail transactions and is typically collected by the seller at the point of sale. Use tax is a complementary tax imposed on goods purchased outside a state but used within it, designed to prevent tax avoidance through out-of-state purchases. Both create compliance obligations for businesses and potential exposure for consumers who fail to report taxable purchases.
Nexus and Collection Responsibility
A business must collect and remit sales tax in a state if it has sufficient nexus there, meaning a meaningful connection such as a physical location, employees, or inventory. The definition of nexus has expanded significantly in recent years, particularly after the Supreme Court decision in South Dakota v. Wayfair, which permits states to require remote sellers to collect sales tax even without physical presence. Businesses must monitor their nexus in each state and register for sales tax permits where required. Failure to register and remit creates liability for unpaid tax, interest, and penalties.
When reviewing state and local tax compliance, many taxpayers overlook the use tax obligation. If you purchase goods outside your state for use at home or in your business, you may owe use tax on that purchase. Most taxpayers do not report use tax, but states increasingly scrutinize this area. Maintaining records of out-of-state purchases and consulting with counsel on reporting obligations can reduce exposure.
5. State and Local Tax: Strategic Planning and Multi-Jurisdictional Considerations
Taxpayers with income or property in multiple states face layered compliance obligations and potential double taxation if not properly managed. Strategic planning at the outset of a move, business expansion, or major transaction can identify opportunities to minimize SALT exposure. Forward-looking considerations include documenting your domicile if you relocate, establishing clear nexus analysis before expanding a business to a new state, and timing major purchases to account for sales tax obligations. Early consultation with counsel on residency status, business structure, and income allocation can preserve options that may be lost once transactions are completed or positions are taken on tax returns.
14 May, 2026
