2026 tax year · South Carolina
Quarterly tax calculator for South Carolina
A $50,000 1099 year in South Carolina means about $2,190 to the IRS and $327 to the state, four times a year.
Switching state opens that state's page.
Line 24 of your prior 1040, unlocks the prior-year safe harbor.
Above $150,000 the prior-year target rises to 110%.
Enter what you expect to earn and press Calculate to see each payment.
The South Carolina payment schedule on $50,000
A single filer with $50,000 of net 1099 profit, taking the standard deduction and paying 90% of this year's liability:
| Due | Income earned | To the IRS | To South Carolina |
|---|---|---|---|
| April 15, 2026 | Jan 1 - Mar 31 | $2,190 | $327 |
| June 16, 2026 | Apr 1 - May 31 | $2,190 | $327 |
| September 15, 2026 | Jun 1 - Aug 31 | $2,190 | $327 |
| January 15, 2027 | Sep 1 - Dec 31 | $2,190 | $327 |
| Year | $8,759 | $1,309 | |
The South Carolina side of each payment
South Carolina taxes the same 1099 profit on 2 graduated brackets topping out at 5.21%, so a second payment goes to the state each quarter, about $327 on the $50,000 example, against $1,455 of South Carolina income tax for the year.
The 2026 dataset carries the federal 1040-ES dates but not state-specific due dates, so confirm South Carolina's schedule and voucher with its tax agency, several states do not match the federal calendar exactly.
What each quarter costs at three income levels in South Carolina
A single filer taking the standard deduction, at three levels of net profit. The federal column moves with the self-employment tax and the federal brackets; the South Carolina column moves with South Carolina's own rules, so the two do not scale together. Use the calculator above for the other filing statuses:
| Net 1099 profit | Per quarter to the IRS | Per quarter to South Carolina | Effective rate |
|---|---|---|---|
| $25,000 | $923 | $104 | 18.3% |
| $50,000 | $2,190 | $327 | 22.4% |
| $100,000 | $5,032 | $872 | 26.2% |
Staying inside the safe harbor
Payments are required once you expect to owe $1,000 or more, which the $50,000 example above does, at $11,187 for the year. Two targets avoid a penalty and you need only the lower; the hub explains both routes and the penalty.
What the rate alone doesn't tell you about South Carolina
On the 2026 rate itself: two-bracket system starting 2026: 1.99% and 5.21%.
What a quarter costs in the states South Carolina borders
On $50,000, South Carolina charges $1,639 of state income tax. Of the 2 states it borders, North Carolina is the lightest at $1,995 and Georgia the most expensive at $2,595, a spread of $600 on the same income.
| State | State tax per quarter | vs South Carolina |
|---|---|---|
| North Carolina | $449 | +$80 a quarter |
| Georgia | $584 | +$215 a quarter |
- North Carolina would take $356 more, $1,995 against South Carolina's $1,639.
- Georgia would take $956 more, $2,595 against South Carolina's $1,639.
What this schedule assumes
- Single filer, standard deduction, net 1099 profit after expenses, no W-2 withholding.
- Four equal payments rather than annualised income.
- South Carolina due dates are not in the 2026 dataset, the dates shown are the federal ones.
South Carolina quarterly tax questions
How much should I send each quarter in South Carolina?
On $50,000 of net 1099 profit as a single filer, about $2,190 to the IRS plus roughly $327 to South Carolina. That is 90% of this year's liability, split four ways.
Does South Carolina use the same due dates as the IRS?
South Carolina requires its own estimated payments, but the 2026 dataset carries only the federal 1040-ES dates (April 15, 2026, June 16, 2026, September 15, 2026, January 15, 2027). Confirm South Carolina's own schedule with its tax agency before assuming they line up.