Tax Filing for Military Members and Veterans in South Carolina

Military tax situations are not more complicated than civilian ones in every respect, but they are different in ways that generic advice and consumer software handle poorly. The differences cluster around three things: where you are considered a resident, which parts of your pay are taxable, and what happens to those rules when you deploy or retire.

This is the foundation, and getting it wrong causes more problems than everything else combined. A service member retains their state of legal residence — their domicile — when posted elsewhere on military orders. Being stationed in South Carolina does not make you a South Carolina resident, and being a South Carolina resident stationed elsewhere does not end that residency.

Federal law provides specific protections here, preventing a state from taxing military pay solely because a service member is stationed within it on orders. Related provisions extend protections to military spouses, allowing a spouse to retain a shared state of residence in defined circumstances rather than acquiring the residency of each posting.

The practical consequence is that a military household may file a state return in a state neither of them is currently living in — and that this is correct rather than an error.

Basic pay is taxable. A substantial portion of the rest of the compensation package is not, and the distinction is frequently missed by people entering the figures themselves.

The combat zone provisions extend beyond the income exclusion itself. Deadlines for filing, paying and taking certain actions are extended for service members serving in designated areas, and those extensions can apply to a spouse as well.

A few deductions exist specifically for military members, including the treatment of certain unreimbursed moving expenses on a permanent change of station — a deduction that was restricted for civilians but retained for the armed forces. Reservists traveling significant distances for duty may also have access to travel expense treatment unavailable to others.

Uniform costs may be deductible in narrow circumstances where the item cannot be worn off duty and is not reimbursed, though this is more limited than commonly believed.

For veterans, the two questions that matter most are how military retirement pay is treated and how disability compensation is treated. These are handled differently from one another, and differently at the federal and state levels.

South Carolina applies its own treatment to military retirement income, and it is more favorable than a veteran moving from some other states might expect. Because the specifics are set by the state and have changed over time, they should be confirmed against current SCDOR guidance rather than assumed from an older return or from advice given in another state.

Disability compensation from the Department of Veterans Affairs is treated differently again. Where a veteran’s status changes — a disability rating awarded or revised after retirement — it can affect prior years, and in some circumstances an amended return is warranted to recover tax paid on income that should not have been taxed.

That last point is worth acting on promptly, because claims for refund are time-limited.

The Department of Defense provides tax preparation and filing assistance to service members and certain family members, and military installations frequently host volunteer assistance programs during filing season. For straightforward situations these are genuinely useful and cost nothing.

They are less suited to households with rental property, business income, complex multi-state residency, or a retirement transition — which is generally the point at which professional preparation earns its cost.