Registering Your Startup to do Business in South Carolina

Capbase Staffby Capbase Staff • 7 min readpublished April 6, 2023 updated April 25, 2023
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Forming your business entity in Delaware—specifically, a corporation—gives you a lot of flexibility, but you may still need to follow local laws depending on what state you operate in.

Specifically, if you do business in South Carolina, you need to register with the state. We’ll walk through the process and simplify it. But first, how can you tell whether you’re legally doing business in South Carolina?

When to register as doing business in South Carolina

Delaware C corps—and all other corporations formed outside of South Carolina—are referred to as “foreign” corporations by the State.

South Carolina statutes do not specifically define what is considered doing business in the state. However, South Carolina statutes provide that the following activities would not require you to register with the State:

Defending or settling a lawsuit

Having a bank account in the state

Selling through independent contractors


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When to register to collect sales tax in South Carolina

Every state has rules about when a company is required to pay sales tax. These are called sales tax nexus rules.

You can think of the nexus as a special version of that state’s border; if you perform certain business activities within that border, you fall into the state’s sales tax nexus, and you’re required to register for and collect state sales tax.

Typically, these actions take the form of buying and selling goods and services.

In South Carolina, the sales tax nexus rules only apply to sellers who sell physical goods or services to South Carolina residents.

Until 2018, selling or buying non-physical goods—like subscriptions to streaming services, SaaS memberships, etc.—did not, generally speaking, qualify you for sales tax nexus. After an important court ruling in 2018, that changed. Now, if you buy or sell non-physical goods or services in a state, you may fall within its sales tax nexus.

South Carolina sales tax nexus (physical goods and property)

If you have a physical presence in South Carolina, then you will likely need to collect and remit sales tax. You may be physically present in a state if you have warehouses, retail spaces, or employees and/or representatives of the business in the state.

You will need to pay sales tax as long as you have physical presence regardless of any minimum thresholds. You can learn more about physical presence for sales tax purposes through the State’s website.

South Carolina sales tax nexus (non-physical goods and property)

The new state sales tax laws applying to non-physical (ie. internet) sales allow you to qualify for sales tax nexus even without physical presence or goods. In South Carolina, you need to cross a certain threshold to qualify.

You will need to collect and remit sales tax if you collect $100,000 or more in retail sales from South Carolina in the current or previous year.

If you would like to take a deep dive, you can check out the State’s website.

As usual, this isn’t legal advice—just a guide. If you’re not 100% clear on whether you fall within South Carolina’s sales tax nexus, it’s best to confer with your legal counsel and/or an accountant that has expertise in South Carolina’s legal code and tax regulations.

How to register to do business in North Carolina

  • Select a name under which to do business. This doesn’t have to be the name you registered when incorporating in Delaware, but it can be.
  • Fill out an application. You’ll need to file an Application by a Foreign Corporation for a Certificate of Authority to Transact Business to the South Carolina Secretary of State.
  • Pay the fee. Now you pay the South Carolina Secretary of State a $110 filing fee.
  • Submit your Application by a Foreign Corporation for a Certificate of Authority to Transact Business.
  • Wait. Processing typically takes two to four weeks.

Once you’re approved to operate as a qualified foreign business in Alabama, you’ll need to comply with certain requirements.

Compliance has a qualified business in South Carolina

To stay in compliance and continue legally doing business in South Carolina, you need to meet two requirements: maintaining a registered agent and filing your annual report. On top of that you will also need to pay your corporate income tax.

Registered agent in South Carolina

Your registered agent in South Carolina is your point of contact with local authorities. If you don’t have a physical address for your company in South Carolina, it may be advantageous to find a registered agent to receive state notices on your behalf.

Foreign corporations are required to have a registered office in South Carolina. The office cannot be a P.O. box, rather it must be a physical address of your registered agent or a licensed registered agent service.

Your registered agent will forward any important information, such as business mail, to you. There are a number of firms that contract out registered agents. They typically cost $50 – $100 per year.

Annual reporting in South Carolina

Every two years, you must file a statement with the State, updating any changes to the company address or the composition of the Board and officers. You’ll include info like:

  • The legal name of your business
  • The name and address of your registered agent
  • The names and addresses of board members, managers, and officers

You will also pay your annual licensing fee with your annual report. The minimum annual licensing fee is $25. The rest of your fee depends on your corporation’s authorized capital.

Paying your corporate income tax

South Carolina has a corporate income tax. A corporate income tax is a direct tax imposed on the income of a corporation. For more information on paying your corporation income tax, please see the following guidance from South Carolina’s Department of Revenue.

Registering for sales tax in South Carolina

If you meet the requirements to collect sales tax in South Carolina, you will need to register with the South Carolina Department of Revenue. You can register with the state through the [South Carolina MyDORWAY provided by the South Carolina Department of Revenue.

Hiring and paying employees in South Carolina

When you hire a new employee in South Carolina, federal and state laws require that you report new hires to the state within 20 days after the employee's first day of work. You can report your new hires online.

Your payroll provider should be able to take care of paycheck withholdings, but it’s up to you to register as an employer with the State and set up an online employer account.

For a comprehensive guide of your responsibilities, South Carolina provides the following information.

The easiest way to register your business in North Carolina

To register your business in South Carolina, you’ve got to keep track of a lot of moving parts. Failing to file the right forms, provide the right information, or stay on top of compliance laws can lead to serious headaches.

Capbase makes it easy. When you incorporate your Delaware corporation on Capbase, we will generate the required information needed to register to do business in South Carolina and keep you up to date on any required filings.

The compliance calendar inside your Capbase account will notify you of upcoming fees, reporting, or other requirements, so you can keep your startup in good standing with South Carolina state officials. Try Capbase now.

Capbase Staff

Capbase is a team of designers, engineers, and business professionals spread across 6 time zones on 3 continents united by our passion for dogs, coffee, and great software.

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DISCLOSURE: This article is intended for informational purposes only. It is not intended as nor should be taken as legal advice. If you need legal advice, you should consult an attorney in your geographic area. Capbase's Terms of Service apply to this and all articles posted on this website.