South Carolina Tax Residency Guide

Establishing residency in South Carolina has become increasingly attractive due to its flat individual income tax reduction and zero estate tax. However, the South Carolina Department of Revenue (SCDOR) and local county assessor offices are highly protective of their tax bases.

Unlike other states that rely on a rigid "183-day rule" to automatically tax you as a resident, South Carolina determines income tax residency based almost entirely on the concept of domicile. However, there are unique traps—particularly the reduced 4% primary residence tax rate—that can trigger audits and exposures if a person fails to surrender that reduced rate but claims to have established a a new domicile in another state.

The Core Rule: Domicile and Intent

Under South Carolina tax law, residency is determined entirely by the legal concept of domicile. Under S.C. Code § 12-6-30(2), a resident individual is defined strictly as someone who is "domiciled in this State." According to the SCDOR's official Domicile Guide, domicile is your true, fixed, and permanent home—the place to which you intend to return whenever you are absent. You can have multiple residences, but you can only have one domicile at any time.

To understand how South Carolina courts analyze domicile, the state relies on three foundational Supreme Court decisions:

• Phillips v. South Carolina Tax Commission (195 S.C. 472): Established the meaning of domicile specifically for individual income tax purposes, ruling that domicile requires both physical presence and the intent to make the place a permanent home.
• Gasque v. Gasque (246 S.C. 423): Ruled that the statutory term "reside" is equivalent in substance to "domicile" under South Carolina law.
• Ravenel v. Dekle (265 S.C. 364): Confirmed that while an individual may have multiple residences, they can only have one domicile at a time, and a prior domicile is maintained until a new one is legally established.

Residency is Domicile-Based, Not Day-Count Based

Many taxpayers moving to South Carolina mistakenly assume the state follows a statutory "183-day rule" (where spending more than six months in the state automatically makes you a resident for tax purposes). However, South Carolina has no statutory day-count test. The SCDOR Domicile Guide explicitly notes that "South Carolina does not have a minimum time that must be spent in the state to be presumed a South Carolina resident."

Instead, SCDOR evaluates domicile based on these key legal principles:

• No Automatic Safe Harbor: Spending fewer than 183 days in South Carolina does not protect you from being audited. If your permanent home and primary economic/family ties remain in the state, you can remain a resident.
• Expressed Intent vs. Conduct: Under Ravenel v. Dekle, any expressed intent to change domicile is evaluated against actual conduct. When your actions contradict your verbal statements, your physical conduct controls the outcome.
• Floating Intention: An intention to return at some indefinite, future time to a former domicile (a "floating intention") does not destroy a new domicile once you have physically moved and established a present home.
• Burden of Proof: The legal burden of showing a change of domicile is on the party asserting the change (generally the taxpayer when moving out of South Carolina, or the tax authority when claiming a new arrival is a resident).

Important Steps to Transition Your Residency

If you are relocating to or from South Carolina, you must align the "center of your life" with your new home. Focus on the following key areas:

• Home Suitability: Downsize or sell your home in the high-tax state, ensuring your primary, year-round home is in South Carolina.
• Administrative Filings: Obtain your South Carolina driver's license, register your vehicles, and register to vote in South Carolina within the statutory windows.
• Property Declarations: Only apply for the 4% legal residence property tax rate if you are fully prepared to file your state income taxes as a resident. Doing both is the only consistent legal approach.
• Day Counting: Keep a precise daily record of your whereabouts. If you spend time splitting residency between South Carolina and another state, you will need detailed day-count logs to defend yourself in an audit.
• Leaving the State: If you decide to leave South Carolina, ensure you take steps to sever ties with the state and establish residency in your new location and spend more time there than in South Carolina.

Ensure Compliance with Domicile365

Because South Carolina residency audits depend on the "totality of your circumstances" and physical presence logs, keeping accurate records is vital.

The Domicile365 App provides a passive, automated, and secure location logging tool. It uses Apple's DeviceCheck App Attest to cryptographically sign your location logs, creating unalterable proof of your physical presence to protect your tax planning from aggressive state auditors.