Two things decide whether a job in South Carolina makes you money: getting the license your work needs, and setting aside the right tax. South Carolina licenses its contractors and taxes their profit, so both are worth getting right before you take work on.
Each section below points to a tool that runs your exact numbers for South Carolina.
Tax in South Carolina
South Carolina has a graduated state income tax that runs up to 5.21% at the top, on top of your federal taxes. Graduated means the rate climbs as your profit does, so a good year costs proportionally more. You owe federal income tax and self-employment tax as well, and you make estimated payments to both South Carolina and the IRS through the year.
On sales tax, South Carolina follows the usual rule for the trades: your labor is not taxed, and you pay sales tax on your materials when you buy them rather than charging it to the customer.
Work out what to hold back on the Tax Set-Aside Calculator, which runs the federal and self-employment numbers for South Carolina.
Getting paid: liens and retainage
A mechanic's lien is the tool that actually gets a South Carolina contractor paid, and in South Carolina you generally have to record it within 90 days of your last day of work. Miss it and you lose the lien, so the dates matter.
Enforcing it has its own clock. 6 months from your last day of work. Work out your dates on the Lien Deadline tool, and if they are close, get an attorney to confirm them against the statute (S.C. Code §§29-5-90, 29-5-120).
On money held back as retainage, this is our plain-English summary for South Carolina. NOT VERIFIED. S.C. Code §11-35-3030 is cited but the row has never been read against it here. The 3.5% and the public release timing are both unconfirmed.
- Private work: No statutory cap.
- Public work: 3.5%.
- Release (unconfirmed): Not clearly set by statute; confirm locally.
Heads up: The public release timing is unverified; confirm it before you rely on a date.
Check the Retainage Calculator before you sign a contract that holds back more.
There is no South Carolina retainage letter on this site, and the NOT VERIFIED line above is why. A letter that tells the party holding your money what to hand over only gets written over a row that has been read against the statute in full. The Document Hub carries the forms that do not turn on a state rule.
Do you need a license in South Carolina?
South Carolina requires a state contractor license to take building work on. The threshold that triggers it: Commercial general and mechanical above $10,000; residential builder above $5,000; residential specialty above $500. Working unlicensed when your job needs a license is the expensive mistake here. The commercial figure was raised from 5,000 by 2023 Act No. 69, effective 19 May 2023; the residential specialty figure from 200 by 2022 Act No. 186. 40-59-240(C) leaves sub-threshold and local matters to county and municipal business-license ordinances. The license comes from SC Contractor Licensing Board (commercial) / SC Residential Builders Commission (residential), both under LLR. South Carolina accepts the NASCLA commercial exam, useful if you work across state lines.
Trade licenses for electrical, plumbing and HVAC are usually separate and often required even where a GC license is not. See what applies to your trade on the Contractor License Checker.
Building codes and permits
South Carolina adopts its building codes statewide, so the rules travel with you across the state. Editions still move, so confirm yours with the building department before you price a job.
- Homes: 2021 (effective 1 January 2023; a 2024 package is adopted with its implementation date not confirmed by the Council)
- Electrical: 2020 (effective 1 January 2023; a 2023 edition is in the pending package)
- Energy: 2009, fixed by separate statute since 2013 and outside the Building Codes Council's power to change
- Plumbing: 2021 IPC (effective 1 January 2023)
South Carolina's building, residential, electrical and plumbing codes are mandatory statewide and a local government may not adopt its own codes or a different edition; the Council decides, and may grant narrow local modifications but not opt-outs. The energy code is the exception in two ways. It is not the Council's at all: it sits in a separate statute that has held it at the 2009 IECC since 2013, and only the legislature can move it, which is why the residential and building codes delete their own energy chapters and refer back to it. And there is one genuine way out of the whole system: a municipality or county that cannot afford enforcement may file an affidavit and be exempted for up to five years at a time, and in that jurisdiction no state building code applies. A 2024 package is adopted with its start date not confirmed on the Council's own pages.
Source: S.C. Code Ann. §6-9-50 (mandatory codes and the bar on local codes) and §6-9-30 (affordability exemption), SC Building Codes Council; S.C. Code Ann. §§6-10-10 to 6-10-90, the Energy Standard Act, in particular §6-10-30. Read against that source on 2026-08-25.
Check a specific job on the permit tool.
Pay and workers' comp
The minimum wage in South Carolina is the federal $7.25 an hour. South Carolina has NO state minimum wage law. The $7.25 reaches you only through the federal FLSA, so it binds only FLSA-covered employment. Whether it binds a particular job turns on whether the FLSA reaches that employment, which is the part most people miss. Check a rate on the minimum-wage tool.
Workers' comp rates in South Carolina are not published as a single figure; they turn on your trade's class code and your payroll. Get a realistic range on the Workers' Comp Estimator, then get a real quote.
If a client will not pay
If a client will not pay, you can sue for up to $7,500 in South Carolina's Magistrate Court. That covers most unpaid-invoice disputes for a small outfit; a bigger claim goes to regular civil court where you will probably want an attorney. Walk through whether filing is worth it on the Small Claims checker.
The clock runs the other way too: a client generally has 3 years to sue you over the work under a written contract in South Carolina, with an absolute cutoff 8 years after the job is substantially complete. Work out your exposure on the Warranty & Claim Deadline tool.
Common questions
How much state income tax will I pay in South Carolina?
South Carolina has a graduated rate up to 5.21% state income tax on your profit, on top of federal income tax and self-employment tax. Use the Tax Set-Aside Calculator to see what to hold back.
Do I need a contractor's license in South Carolina?
Yes. South Carolina requires a state contractor license. The threshold: Commercial general and mechanical above $10,000; residential builder above $5,000; residential specialty above $500. It is issued by SC Contractor Licensing Board (commercial) / SC Residential Builders Commission (residential), both under LLR.
What is the small claims limit in South Carolina?
You can sue for up to $7,500 in South Carolina's Magistrate Court. The filing fee is typically $80 to $120. Larger claims go to regular civil court.
How long do I have to file a mechanic's lien in South Carolina?
Generally 90 days from your last day of work. Miss it and you lose the lien. Work your own dates out on the Lien Deadline tool.
What is the minimum wage in South Carolina?
$7.25 an hour, the federal floor. South Carolina does not set a higher rate of its own, so that floor reaches a worker through federal FLSA coverage rather than through state law. Check a specific job on the minimum-wage tool.
What building code does South Carolina use?
South Carolina adopts statewide. Homes: 2021 (effective 1 January 2023; a 2024 package is adopted with its implementation date not confirmed by the Council). Electrical: 2020 (effective 1 January 2023; a 2023 edition is in the pending package). Editions move, so confirm yours with the building department before you price a job.
The honest bit
These are the 2026 rules for South Carolina as they stood when this guide was written, and they change: legislatures move thresholds, deadlines and rates every year. Treat this as general guidance to point you in the right direction, not legal, tax or financial advice. Verify anything you rely on at the source (the IRS, the South Carolina tax and licensing agencies, and your local building department) or with a professional. Where South Carolina does something unusual, the detail is called out above rather than glossed over.
Related: Tax Set-Aside Calculator · Mechanic's Lien Deadline · Contractor License Checker · Small Claims checker · Working in Your State
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Sources
- South Carolina contractor licensing authority · South Carolina contractor licensing authority. Who must hold a contractor or trade license in South Carolina, and the licensing instrument (https://www.nascla.org/commercial-exam-participating-state-agencies/south-carolina-contractors-licensing-board)
- South Carolina Legislature Online · Mechanics lien notice, filing and enforcement deadlines in South Carolina: S.C. Code §§29-5-90, 29-5-120. Verified against this authority on 2026-08-09.
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