How is Alimony Calculated in South Carolina?

South Carolina courts have no formula for alimony. A judge weighs 13 statutory factors under S.C. Code §20-3-130(C) and chooses from five distinct types of spousal support, then decides the amount and how long it lasts based on the specific facts of the marriage. Unlike many states that have phased out permanent alimony in recent years, South Carolina still allows periodic alimony to continue indefinitely for long marriages, with no built-in end date tied to how long the couple was married.

South Carolina also has one of the strictest fault-based rules in the country. A spouse who commits adultery before a settlement agreement is signed can be barred from alimony entirely, regardless of financial need. Understanding how these pieces fit together matters as much as the dollar amount.

The Five Types of Alimony in South Carolina

South Carolina law recognizes five named types of spousal support under S.C. Code §20-3-130(B), plus a catch-all provision letting courts order "such other form of spousal support" as circumstances require. Courts can also combine more than one type in the same case.

Periodic alimony is ongoing support, typically paid monthly. It ends automatically if the recipient remarries or begins a "continued cohabitation" with a new partner, or when either spouse dies. Unlike some of the other types, periodic alimony can be increased, decreased, or terminated later if either spouse's circumstances change substantially.

Lump-sum alimony is a fixed total amount, paid either all at once or in installments over time. Once ordered, it generally cannot be modified for any reason and continues even if the recipient remarries or starts a new relationship — it ends only when the recipient dies. Courts use this type when they want a clean, predictable, one-time resolution instead of an ongoing support relationship.

Rehabilitative alimony is a fixed sum tied to a specific self-sufficiency plan — for example, completing a degree or professional certification. It ends on remarriage, continued cohabitation, death, or a specific triggering event set by the court, and it can be modified if unforeseen circumstances derail the recipient's good-faith efforts to become self-supporting, or affect the paying spouse's ability to keep paying.

Reimbursement alimony pays back a spouse for contributions made during the marriage that are expected to benefit the other spouse's future earnings — most commonly, funding a spouse's education or professional license. It ends on remarriage, continued cohabitation, or death, but it is not modifiable based on later changes in either spouse's income or circumstances.

Separate maintenance and support applies when a couple is living apart but not seeking a divorce. It functions similarly to periodic alimony — modifiable based on changed circumstances — but ends automatically if the couple later divorces, since a divorce decree would set new terms.

The 13 Factors Courts Weigh

Before setting type, amount, and duration, South Carolina courts work through 13 factors listed in S.C. Code §20-3-130(C). The statute doesn't rank them — a judge gives each factor "such weight as it finds appropriate" based on the case.

The Adultery Bar — South Carolina's Strictest Alimony Rule

South Carolina is one of a small number of states with an absolute, statutory adultery bar. Under S.C. Code §20-3-130(A), a spouse who commits adultery before the earlier of two events — signing a written property or marital settlement agreement, or the entry of a permanent court order — cannot receive any alimony at all, regardless of need or how long the marriage lasted.

The bar requires proof of both "opportunity and inclination" — meaning the accusing spouse generally has to show the other spouse had private access to another person and demonstrated romantic interest, not just that adultery is suspected. Adultery that's been condoned, or that resulted from connivance by the other spouse, doesn't trigger the bar. Adultery that happens after a settlement agreement is signed does not retroactively cut off support that's already been ordered.

Even when the strict bar doesn't apply — for example, if the adultery happened after the cutoff date, or wasn't proven to the required standard — marital misconduct remains one of the 13 general factors a court can still weigh in setting the amount.

Continued Cohabitation and When Alimony Ends

South Carolina law defines "continued cohabitation" specifically: the supported spouse living with another person in a romantic relationship for 90 or more consecutive days. Courts can also find continued cohabitation exists even with shorter stretches under 90 days if it looks like the couple is deliberately splitting up periods of time together to avoid crossing the threshold.

This matters because continued cohabitation ends periodic alimony, rehabilitative alimony, reimbursement alimony, and separate maintenance and support automatically. Lump-sum alimony is the exception — because it's a fixed, non-modifiable amount, it continues to be paid out on its original schedule even if the recipient remarries or moves in with someone new. It ends only when the recipient dies.

How Long Does Alimony Last in South Carolina?

There's no statutory formula tying alimony duration to years of marriage. South Carolina remains one of a shrinking number of states that still permits periodic alimony to run indefinitely — meaning a court can order support that continues for as long as both spouses are alive and the recipient hasn't remarried or entered a qualifying cohabiting relationship. This is most common after long marriages with a significant, lasting gap in earning power between the spouses.

Rehabilitative and reimbursement alimony are inherently shorter-term, tied to a specific plan or a specific past contribution. Lump-sum alimony has a fixed payment schedule set at the time of the order. Across all types, the length of the marriage tends to be one of the 13 factors courts weigh most heavily when deciding whether — and for how long — support should continue.

Can Alimony Be Modified After the Divorce?

It depends entirely on which type of alimony was ordered. Periodic alimony and separate maintenance and support can both be increased, decreased, or ended later if either spouse experiences a substantial change in circumstances. Rehabilitative alimony can be modified, but only based on unforeseen events that frustrate the supported spouse's good-faith efforts toward self-sufficiency, or that affect the paying spouse's ability to keep up payments. Lump-sum and reimbursement alimony are designed to be final — once ordered, they generally cannot be modified regardless of later changes.

Retirement by the paying spouse is treated as its own category. Under S.C. Code §20-3-170(B), retirement is sufficient grounds to request a hearing on whether alimony should change, and the court considers whether retirement was contemplated when alimony was first awarded, the paying spouse's age and health, whether the retirement is mandatory or voluntary, and whether it actually reduces that spouse's income.

How Taxes Work With South Carolina Alimony

Federal tax law changed in 2019. For divorce or separation agreements executed on or after January 1, 2019, alimony payments are not deductible by the paying spouse and are not counted as taxable income by the recipient. Agreements finalized before 2019 may still follow the older rule — deductible for the payer, taxable to the recipient — unless the agreement has since been modified to adopt the new rules.

South Carolina has its own state income tax, so both spouses should factor state filing into the numbers as well, even though alimony itself isn't deductible or taxable federally under agreements from 2019 forward. A payment of $2,000 per month costs the paying spouse $2,000 after tax and arrives to the recipient as $2,000 before any further tax obligations of their own. Our divorce financial calculator can help you model the income picture on both sides.

What to Expect If Your Case Goes to Court

Because South Carolina has no alimony formula and allows courts wide discretion, a contested case can be genuinely unpredictable — especially when fault or adultery allegations are involved. Two similar cases before different judges, or even the same judge on different days, can land in different places. Local practice, how clearly each side presents their financial picture, and the specific facts of the marriage all shape the outcome.

Spouses who can reach a negotiated settlement, whether through direct negotiation or mediation, generally have more control over the outcome than leaving the decision entirely to a judge after a trial. For a broader look at how property division, retirement accounts, and child support are handled alongside spousal support in South Carolina, see our South Carolina divorce finances overview. For a comparison of how duration rules work across different states, our guide on how long alimony lasts has a plain English breakdown.