VoIP Providers & Business Phone Companies in South Carolina (SC)
How to choose VoIP providers in South Carolina
Where to find VoIP providers in South Carolina's major metros
A South Carolina phone bill carries a few state line items that most buyers have never had explained to them, and the providers who can explain them cluster in a handful of regions. Charleston, Columbia and North Charleston are the state's largest cities, followed by Mount Pleasant, Rock Hill and Greenville. Buyers tend to think in metros, though: the Upstate around Greenville and Spartanburg, the Midlands around Columbia, the Lowcountry around Charleston, and the Grand Strand around Myrtle Beach.
The Upstate has the widest spread of local firms. Besides Greenville, there are providers in Greer, Simpsonville and Campobello, and one farther west in Seneca, which helps lake and Clemson area offices that would rather not wait on a truck from the I-85 corridor. In the Lowcountry, look at Charleston, North Charleston, Mount Pleasant and Sullivans Island. Columbia anchors the Midlands, Myrtle Beach the Grand Strand, and Hilton Head Island the southern coast.
In Florence, Sumter, Orangeburg or the smaller towns along I-95, you will mostly choose between a regional firm that drives in for installs and a national provider that does everything remotely. Rock Hill and Fort Mill buyers can reasonably add Charlotte firms to the shortlist. Just know which kind of provider you are buying from.
On the coast, ask every bidder how calls keep flowing when a hurricane evacuation closes the office. A good answer covers automatic forwarding to cell phones, a mobile app your staff will actually use, and 843 or 854 numbers that keep ringing while the building is dark.
South Carolina 911 fees, USF charges and taxes on a VoIP bill
State law puts a VoIP 911 charge on each VoIP service line, equal to the 911 charge on a traditional landline in your area. A line, for this purpose, is a VoIP service with an assigned phone number that can make outbound calls. Ask how the provider counts lines, especially if many extensions share one main number. The charge goes to the local government where the service is primarily used, and the Revenue and Fiscal Affairs Office oversees 911 funding.
Other items to expect:
- South Carolina Universal Service Fund. VoIP providers holding a Public Service Commission certificate, or registered with the Commission, must contribute. The Office of Regulatory Staff sets the factor each year; for 2024 it was 3.27%. Most providers pass it through.
- Dual party relay charge. This funds relay service for deaf and speech impaired callers. The Commission can require up to ten cents per line each month.
- Sales tax. The Department of Revenue counts the USF surcharge a provider bills you as part of the taxable charge for communications service, so sales tax applies to that amount too.
These figures move, so confirm current amounts with ORS or the Department of Revenue. Then ask each bidder for an all-in monthly price per line with every surcharge spelled out. A low base rate can hide a long tail of fees.
The Commission's main contact with VoIP companies is certification and registration. Ask whether a provider holds a PSC certificate or has filed the state's VoIP registration. One that has done neither, and isn't billing state USF, may not be set up correctly to sell service here.
911 location and call recording rules for South Carolina business phones
Two federal rules sit on top of the state 911 charge. Kari's Law requires multi-line systems to let anyone dial 911 directly, with no 9 or other prefix, and to alert someone on site, such as a front desk, when a call goes out. RAY BAUM's Act requires 911 calls to carry a dispatchable location: a street address plus details like floor or suite. For a Greenville office park or a multi-building campus in Columbia, have the provider show you how each phone's location is registered and who updates it when staff work from home.
Call recording is simpler. South Carolina is a one-party consent state, so a business can record calls it takes part in. Calls to customers in all-party consent states such as Florida or California are a different matter, since the stricter rule may apply. If your team sells across state lines, use a recorded announcement and leave it on.
How to compare local and national VoIP providers in South Carolina
Put the same questions to every bidder:
- Who installs the phones, and is that person an employee or a subcontractor?
- What is the guaranteed on-site response time in my county?
- How long does number porting take, and who chases the old carrier if it stalls?
- What does it cost to leave, and do I keep my numbers?
National providers usually win on price and app features. Local firms win when something physical fails: a network switch, a door phone, old wiring in a historic building on the Charleston peninsula. Many businesses split the difference with a national platform installed and supported by a local reseller. Ask for two references from South Carolina customers about your size and call them.
On contracts, watch for auto-renewal clauses, equipment leases that outlast the service term, and vague "regulatory recovery" fees that are not the state charges listed above. Multi-year terms are common. Push for a shorter one, or an exit clause if service levels slip. The city pages on Purchasing Reviews are a sensible place to start that shortlist.