South Carolina Estate
Tax Calculator

South Carolina does not impose a state estate tax or inheritance tax. The state's estate tax was linked to the federal credit and expired in 2005.

South Carolina has not enacted a replacement. Only the federal estate tax applies.

South Carolina's growing retirement population, particularly in coastal areas like Hilton Head, Charleston, and Myrtle Beach, has increased estate planning needs. Many families relocate from high-estate-tax states like Connecticut, New York, and Massachusetts specifically to avoid state-level transfer taxes.

Only the federal estate tax applies to South Carolina estates. The $15 million exemption with portability and 40% top rate governs.

No state filing is needed.

South Carolina's favorable tax environment (no state estate tax, a capped 7% income tax rate, and favorable retirement income exemptions) makes domicile changes from northern states common. New residents should document their South Carolina domicile to prevent former states from asserting taxing jurisdiction.

South Carolina is a common-law property state with an elective share statute providing the surviving spouse one-third of the probate estate. The elective share applies only to the probate estate, not to non-probate assets like revocable trust property.

This distinction can be exploited in planning but also challenged in litigation.

Coastal real estate in South Carolina is subject to flood zone valuation considerations and erosion risk, which can affect appraisals for federal estate tax purposes. Lowcountry properties with conservation easements (protecting marsh, maritime forest, or farmland) can achieve significant valuation reductions.

Those in the Lowcountry should routinely evaluate easement potential for estates with significant land holdings.

Evaluate federal estate tax exposure for South Carolina estates. Use this calculator to model portability elections and conservation easement strategies.

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Because South Carolina does not impose a state estate tax, the federal estate tax is the only transfer tax layer. The current federal exemption of $15 million per individual (2025) shelters the vast majority of estates.

However, estates that exceed this threshold face a top marginal rate of 40%, making federal planning essential for high-net-worth South Carolina residents.

The Tax Cuts and Jobs Act (TCJA) doubled the federal exemption effective 2018, but this increase is scheduled to sunset after 2025. If Congress does not act, the exemption will revert to approximately $7 million (adjusted for inflation).

For South Carolina residents with estates between $7 million and $15 million, this sunset creates a planning window: transfers made now under the higher exemption will not be clawed back, even if the exemption later decreases.

The absence of a state estate tax in South Carolina simplifies the analysis — there is no gap between state and federal exemptions to navigate, no separate state return to file, and no risk of double taxation. However, this also means there is no state-level deduction to offset federal liability.

Federal planning tools — marital deductions, charitable deductions, and the unified credit — carry the full weight of estate tax mitigation. Use the South Carolina estate tax calculator to model current and post-sunset scenarios, and review the South Carolina probate cost calculator to understand full settlement costs.

Federal portability allows a surviving spouse to inherit the deceased spouse's unused estate tax exclusion (DSUE), effectively doubling the available federal exemption to $30 million for married couples. Electing portability requires filing Form 706 for the first-to-die spouse, even if no federal estate tax is owed — a step that is frequently overlooked when no tax appears to be due.

Because South Carolina does not impose a state estate tax, there is no state-level portability concern. The federal election is the only one that matters, and it applies automatically to the surviving spouse's estate once made.

This is simpler than in estate-tax states, where the lack of state portability forces the use of bypass trusts to preserve both exemptions.

Despite this simplicity, portability has limitations. The DSUE amount is not indexed for inflation — it locks in at the value of the first spouse's unused exemption at the date of death.

If the surviving spouse remarries and the new spouse dies, the DSUE from the first spouse is lost. For South Carolina families with significant wealth, bypass trusts may still be preferable to portability because they provide asset protection, generation-skipping benefits, and inflation-adjusted growth outside the surviving spouse's taxable estate.

Use the executor fee calculator and probate cost calculator to understand the full administration picture when comparing trust structures.

Without a state estate tax, South Carolina residents focus planning efforts on the federal layer. The current $15 million exemption provides substantial shelter, but the scheduled TCJA sunset makes it prudent to accelerate planning.

Irrevocable trusts — including ILITs, SLATs, and QPRTs — remove assets from the taxable estate permanently. Once transferred, these assets and their future appreciation are outside the federal estate, regardless of future exemption changes.

Annual exclusion gifts of $19,000 per recipient (2025) remain the simplest estate reduction tool. Married couples can jointly gift $38,000 per recipient through gift-splitting.

Over a decade, a family gifting to four beneficiaries annually removes $1.44 million from the estate with no gift tax return required. Charitable deductions — whether through outright bequests, donor-advised funds, or charitable trusts — further reduce the taxable estate while supporting philanthropic goals.

GRATs and GRUTs (grantor retained unitrusts) transfer appreciation to beneficiaries at minimal transfer tax cost. For South Carolina residents holding concentrated stock positions or rapidly appreciating assets, these vehicles are particularly efficient.

Family limited partnerships and LLCs may provide valuation discounts for gift and estate tax purposes, though the IRS scrutinizes these structures closely. Professional valuation and proper documentation are essential.

Model your federal exposure with the South Carolina estate tax calculator, or find an estate planning attorney in South Carolina for personalized guidance.