South Carolina has a state income tax, and it applies to most wage earners
Yes, South Carolina charges state income tax on wages, investment income, and other earnings. The state tax rate ranges from 0% to 7%, depending on your income bracket. Unlike some states that have no income tax at all, South Carolina requires most residents and anyone earning money within the state to file a state return alongside their federal one.
The tax is progressive, meaning the rate increases as your income goes up. You do not pay the top rate on all your income—only the portion that falls into each bracket is taxed at that bracket's rate. South Carolina's Department of Revenue administers the tax and handles returns, refunds, and payment processing.
Key Takeaways
- South Carolina income tax rates run from 0% on the lowest incomes to 7% on income over $15,000 for single filers, with different brackets for married and head-of-household status.
- You must file a South Carolina return if you earned income in the state or lived there for the full tax year, even if you owe no tax.
- The state allows a standard deduction that reduces your taxable income, similar to the federal standard deduction.
- Retirement income, including Social Security and some pension payments, may be partially or fully exempt from South Carolina tax depending on your age and income level.
- You can file your state return online through the South Carolina Department of Revenue website or by mail using Form SC 1040.
How South Carolina income tax brackets work
South Carolina uses seven tax brackets. The lowest bracket starts at 0% for income under $2,930 (for single filers in 2024), and each bracket increases by roughly 1% until reaching the top rate of 7% on income over $15,000. The exact dollar amounts for each bracket adjust slightly each year for inflation.
Your filing status determines which bracket applies to you. Single filers, married couples filing jointly, and heads of household each have their own bracket structure. A married couple filing jointly reaches the 7% bracket at a higher income level than a single person would, which is why your filing status matters when calculating your tax.
To calculate what you owe, you subtract your standard deduction from your gross income, then explore the tax rates to each bracket. The standard deduction for 2024 is $3,700 for single filers and $7,400 for married couples filing jointly, though these amounts change annually.
Who has to file a South Carolina return
You must file a state return if you lived in South Carolina for the entire tax year and earned income, or if you earned income within South Carolina regardless of where you lived. The income threshold that triggers a filing requirement is lower than the federal threshold, so you may need to file a state return even if you do not owe federal tax.
If you are a resident and your income falls below the standard deduction, you technically owe no tax, but the state still requires you to file. Filing protects you in case of an audit and ensures you receive any refund you are may have access to to from overpayment or tax credits.
Non-residents who earned income in South Carolina—such as someone who worked there for part of the year—must also file, but only on the income earned within the state. You would file both a South Carolina return and a return in your home state if applicable.
Retirement income and special exemptions
South Carolina offers significant tax breaks for retirement income. If you are 65 or older, you can exclude up to $10,000 of retirement income per year from state taxation. This includes distributions from IRAs, 401(k)s, pensions, and annuities. The exemption applies regardless of your total income, making it one of the most generous retirement provisions in the state tax code.
Social Security benefits are not taxed by South Carolina, even if they are taxed at the federal level. Military pensions are also fully exempt from state income tax. If you receive income from multiple retirement sources, you can stack exemptions—for example, you could exclude $10,000 from a pension and also receive your full Social Security benefit tax-free.
Certain other income sources may be partially exempt or deductible. Long-term capital gains have preferential treatment in some cases, and income from certain bonds or investments may may have access to for exemptions. The South Carolina Department of Revenue website lists the full set of exemptions and their specific requirements.
How to file your South Carolina return
You can file online through the South Carolina Department of Revenue website using their e-file system, which is free for most taxpayers. The online system walks you through your income, deductions, and credits, then calculates what you owe or what refund you should receive.
If you prefer to file by mail, you will need Form SC 1040 (the main return form) plus any schedules that explore to your situation. You can read these forms from the Department of Revenue website or request them by phone. Mail your completed return to the address listed on the form by April 15 unless you have filed for an extension.
Many tax preparation software packages handle South Carolina returns as part of their standard service. If you use software like TurboTax or H&R Block, the state return is usually included in the price or available as an add-on. Some community organizations also offer free tax preparation information if your income is below a certain threshold.
What happens if you do not file or pay on time
If you owe tax and do not file by April 15, the state charges a failure-to-file penalty of 5% per month, up to 25% of the tax owed. If you file but do not pay, the penalty is 0.5% per month. Interest accrues on unpaid tax at a rate set quarterly by the Department of Revenue, currently around 8% annually.
If you cannot pay by the important date, you can request a payment plan through the Department of Revenue. Setting up a plan stops the failure-to-pay penalty from growing and shows the state you are working to resolve the debt. You can also request an extension to file, which gives you until October 15 to submit your return, though tax is still due by April 15.
The state can place a lien on your property or garnish your wages if you owe a large amount and do not respond to notices. If you receive a notice from the Department of Revenue, respond promptly—ignoring it makes the situation worse.
Deductions and credits available in South Carolina
Beyond the standard deduction, South Carolina allows you to claim certain itemized deductions if they exceed your standard deduction amount. These include mortgage interest, property taxes, charitable donations, and medical expenses above a threshold. You report these on Schedule A and attach it to your return.
The state also offers tax credits that directly reduce the tax you owe. The Earned Income Tax Credit (EITC) is available to lower-income working people and families. South Carolina's version is a percentage of the federal EITC, so if you may have access to federally, you likely may have access to for the state credit as well. Other credits may be available for education expenses, dependent care, or property tax relief depending on your situation.
Credits are more valuable than deductions because they reduce your tax dollar-for-dollar rather than just reducing your taxable income. If a credit exceeds the tax you owe, some credits are refundable, meaning you receive the difference as a refund.
Frequently Asked Questions
Do I have to pay South Carolina income tax if I just moved there?
If you moved to South Carolina partway through the year, you are considered a resident for the portion of the year you lived there. You file a part-year resident return and pay tax only on income earned after you moved. Your previous state may also require a return for the months you lived there.
What if I work in South Carolina but live in another state?
You must file a South Carolina return on the income you earned in the state. You will also file a return in your home state. Most states allow a credit for taxes paid to another state to avoid double taxation, so check your home state's rules to see if you can claim a credit for South Carolina tax paid.
Are there any income sources that are not taxed by South Carolina?
Social Security, military pensions, and certain retirement income are exempt. Some types of investment income and municipal bond interest may also be exempt. The Department of Revenue publishes a full list of exempt income on their website.
Can I file my South Carolina return without filing federal?
Yes, you can file a state return without filing federal, though this is rare. If you owe no federal tax, you may still owe South Carolina tax because the state has different income thresholds and deductions. However, if you are may have access to to a federal refund, you should file federal to claim it.
What if I cannot pay my South Carolina tax bill?
Contact the Department of Revenue to set up a payment plan. You can also request an extension to file, though tax is still due by April 15. The sooner you contact the state, the more options you have to resolve the debt without penalties growing.