Yes, South Carolina has a state income tax

South Carolina charges a state income tax on wages, investment income, and other earnings. Unlike some states that have no income tax at all, South Carolina residents and anyone earning money within the state must pay this tax. The state tax rate ranges from 0% to 7%, depending on your income level, and is separate from the federal income tax you owe.

The state collects this tax through payroll withholding if you are employed, or through quarterly estimated payments and annual returns if you are self-employed or have investment income. Your employer typically deducts South Carolina state tax from each paycheck, similar to how federal tax works.

Key Takeaways

  • South Carolina has a progressive income tax system with rates ranging from 0% to 7%, meaning higher earners pay a higher percentage.
  • If you work in South Carolina or live there, you will owe state income tax on your earnings unless you fall into a specific exemption category.
  • Your employer should withhold state tax from your paycheck automatically, but you can adjust your withholding by filing a new W-4 form with your employer.
  • Retirees may may have access to for a pension or retirement income exclusion, which can reduce or eliminate state tax on certain retirement income.
  • You file South Carolina state taxes using Form SC 1040, which you submit to the South Carolina Department of Revenue separately from your federal return.

How South Carolina's tax brackets work

South Carolina uses a progressive tax system, which means your tax rate increases as your income increases. You do not pay the top rate on all your income—only on the portion that falls into each bracket. For example, if the 7% bracket starts at $60,000, you only pay 7% on income above that threshold, not on your first $60,000.

The exact brackets change each year because the state adjusts them for inflation. The lowest bracket starts at 0% for very low incomes, and the highest bracket reaches 7%. Most working South Carolinians fall somewhere in the middle brackets, typically paying between 3% and 5.75% on their income. You can find the current year's brackets on the South Carolina Department of Revenue website, or your tax software will use the correct rates automatically.

Who has to pay South Carolina state tax

You owe South Carolina state income tax if you are a resident of the state or if you earned money within South Carolina during the year. Residents include people who live in the state for the entire year, as well as people who moved to or from South Carolina partway through the year. If you worked in South Carolina but lived in another state, you still owe South Carolina tax on the income you earned there.

Some income is exempt from South Carolina tax. Military pensions, certain federal pensions, and some retirement income may not be taxable at the state level. If you are retired and receiving a pension, you may be able to exclude a portion or all of that income from your state tax return. Students who are claimed as dependents on their parents' federal return may also have different rules. The best way to know whether your specific income is taxable is to review the instructions for Form SC 1040 or speak with a tax professional.

How withholding works and what to do if it is wrong

When you start a job in South Carolina, your employer asks you to complete a withholding form so they know how much state tax to deduct from each paycheck. This form tells your employer whether you are single, married, have dependents, or have other jobs. Based on your answers, your employer calculates the right amount to withhold.

If too much tax is being withheld, you will get a refund when you file your return. If too little is being withheld, you will owe money. You can adjust your withholding at any time by giving your employer a new form. If you had a major life change—marriage, divorce, a second job, or a child—updating your withholding can prevent overpaying or underpaying throughout the year. Your payroll department can walk you through the process, or you can read the form from the South Carolina Department of Revenue website.

Filing your South Carolina state tax return

You file your South Carolina state tax return using Form SC 1040, which is the state equivalent of the federal Form 1040. You submit this form to the South Carolina Department of Revenue, not to the IRS. Most people file their state and federal returns at the same time, often using the same tax software, because the information overlaps.

The important date to file is the same as the federal important date, which is typically April 15. If you file your federal return late or request an extension, the same extension applies to your state return. You can file by mail, through the state's online system, or using tax software that supports South Carolina returns. If you are owed a refund, the state typically processes it within four to six weeks of receiving your return.

Deductions and credits available in South Carolina

South Carolina offers several deductions and credits that can lower your state tax bill. The standard deduction—a flat amount you can subtract from your income before calculating tax—is available to all filers. The amount depends on your age and filing status. You can also itemize deductions if you have large expenses like mortgage interest or charitable donations, though most people use the standard deduction because it is simpler and often larger.

The state also offers credits for things like child and dependent care expenses, education costs, and property taxes paid. Some credits are refundable, meaning you can receive money back even if you owe no tax. Others are non-refundable, meaning they can only reduce your tax bill to zero. The instructions for Form SC 1040 list all available credits and explain which ones you may be able to use. Tax software will usually ask you questions about your situation and automatically calculate which credits you may have access to for.

Frequently Asked Questions

Do I have to file a South Carolina return if I only lived there part of the year?

Yes, if you earned income in South Carolina during any part of the year, you must file a state return for that year. You report only the income you earned while you were a resident or while you worked in the state. If you moved to South Carolina partway through the year, you file one return covering the entire year, but only the income earned after you moved is subject to South Carolina tax.

What happens if I do not pay my South Carolina state taxes?

The South Carolina Department of Revenue can assess penalties and interest on unpaid taxes. They may also place a lien on your property, garnish your wages, or intercept your federal tax refund to cover the debt. If you cannot pay in full, the department offers payment plans. Contact them as soon as possible if you owe money—waiting makes the debt larger.

Can I deduct federal income tax from my South Carolina return?

No, South Carolina does not allow you to deduct federal income tax paid. However, you can deduct state and local taxes (SALT) on your federal return, up to a limit of $10,000 per year. This is a federal deduction, not a state one, and it reduces your federal tax, not your state tax.

Is Social Security income taxable in South Carolina?

Social Security benefits are generally not taxable in South Carolina. However, if you have other income above certain thresholds, a portion of your benefits may be taxable at the federal level. South Carolina follows the federal rules, so if your benefits are taxable federally, they are also taxable in South Carolina. Check the instructions for Form SC 1040 or speak with a tax professional if you receive Social Security.

Where do I send my South Carolina tax return?

You can file online through the South Carolina Department of Revenue website, which is the fastest method. If you file by mail, the address is listed in the Form SC 1040 instructions. Most people use tax software that files electronically on their behalf, which is faster and more find than mailing a paper return.