Cheapest Home Internet in Charleston South Carolina: 5 Plans, Modem Fees Counted

(content by Zoya)

Finding the cheapest home internet in Charleston, South Carolina is not as simple as clicking the lowest banner ad. We read each major provider’s own Charleston or plan page on October 2, 2026. Starting prices run from $30 to $60 a month, but the real cost depends on equipment, AutoPay rules, phone-line discounts and what happens after the first year. WOW! has the lowest advertised starting price, AT&T has the cheapest fiber entry tier, Xfinity offers a five-year price on its 300 Mbps plan, and T-Mobile or Verizon can drop to $35 when you already pay for their phone service. This guide compares five plans by monthly price, equipment and two-year cost.

The quick answer

Fast facts

The lowest advertised starting price in Charleston comes from WOW!, with speeds from $30 a month (AutoPay and paperless billing; equipment, taxes and other fees extra). WOW! includes a WiFi modem and offers a $5-a-month Price Lock for Life add-on.

Need fiber? AT&T Fiber 300 is $35 a month for the first 12 months after discounts. Prefer cable with a long price guarantee? Xfinity sells 300 Mbps for $45 a month for five years. Prefer fixed wireless? With an eligible phone line, T-Mobile Rely or Verizon 5G Home drops to $35; without one, the price is $50 and $60.

* AT&T’s $35 includes a $15 new-customer discount for 12 months and a $10 AutoPay and paperless discount.

† Price drops to $35 with an eligible mobile line.

Enter your exact street address in each provider’s checker before you order. The cheapest option can change from one block to the next.

How we picked the five plans

Our goal was to find what a Charleston household pays for reliable home internet over two years.

1. On October 2, 2026 we opened each provider’s own Charleston page or national plan page. We did not use prices from aggregator sites.
2. We kept plans with a starting price of $60 or less where the provider includes the modem, gateway or router.
3. For each plan we estimated a two-year service cost from the published monthly price and any published promo change. Taxes, one-time fees and optional add-ons are not included unless we say so.

Five cheapest plans at a glance

* Based on WOW!’s “from $30” starting price. Your price depends on the speed and address; WOW! lists equipment, taxes and other fees as extra.

† $35 for months 1 to 12, then $50 once the $15 new-customer discount ends.

These numbers point to the first questions to ask at checkout: which WOW! speed the “from $30” price applies to at your address, AT&T’s month-13 change, and the phone-line rules on the fixed-wireless plans.

1. WOW! Internet: lowest advertised starting price

Quick facts

Why it leads on price

WOW! advertises speeds from $30 a month on its Charleston, SC residential internet services page, the lowest starting price we found from a wired provider in Charleston. For $5 a month more, the Price Lock for Life add-on keeps your monthly rate the same as long as you stay with the same speed. WOW! says this means no introductory pricing and no rate hikes after year one.

The page also lists no annual contracts, a WiFi modem included (or bring your own), a free self-install kit and a 30-day guarantee. That makes WOW! a flexible choice for renters and people who may move.

Coverage

WOW! lists West Ashley, James Island and parts of Mount Pleasant, with ZIP codes 29407, 29412 and 29464 and nearby areas. Coverage is address-specific, so run the availability check for your street.

If your street qualifies, WOW! gives you the lowest advertised entry price in Charleston, and the price lock adds long-term certainty.

2. AT&T Fiber 300: cheapest fiber entry tier

Quick facts

Why it stands out

AT&T’s Charleston page lists Internet 300 at $35 a month after discounts, on a 100% fiber network. Fiber is a good fit for video calls and cloud backups, because AT&T’s 300 Mbps plan does not have the low upload limits of many cable plans.

What to watch

• Price change: the $15 new-customer discount lasts 12 months, so the bill goes to $50 in month 13.
• AutoPay rules: the full $10 discount needs AutoPay and paperless billing with an eligible payment method.
• Eligibility: AT&T says many homes in Charleston may qualify for AT&T Fiber. Enter your exact address and confirm the fiber plan appears.

Pick AT&T Fiber 300 when you want fiber and plan to stay at least a year.

3. Xfinity 300 Mbps: a five-year price on cable

Quick facts

Why it stands out

Xfinity’s Charleston page offers 300 Mbps for $45 a month for five years, with WiFi equipment and unlimited data included and no contract. If you do not want to think about a month-13 price change, this is the simplest long-term cable price on our list.

Trade-offs to know

• Offer date: the deal is for new customers and ends 10/25.
• Payment rules: AutoPay with a stored bank account and paperless billing are required. Taxes and fees are extra.
• Prepaid option: Xfinity’s NOW Internet prepaid service gives 200 Mbps for $45 a month at an all-in monthly price with no commitments.

Choose Xfinity if a fixed price for five years matters more to you than the lowest first-year bill.

4. T-Mobile Rely: easy-install wireless option

Quick facts

Why it stands out

Rely is T-Mobile’s entry 5G home internet plan. You set up the gateway yourself, and there is no technician visit. The five-year price guarantee matches Xfinity’s and is longer than Verizon’s three years.

Points to test

• Performance: T-Mobile delivers this service over its 5G cellular network, and speeds vary with local network conditions and data prioritization. Test it at busy times of day during the 15-day test drive.
• Bundled math: the $35 rate only saves money when you already carry an eligible T-Mobile voice line.

Pick T-Mobile Rely if you want a simple setup and a long price guarantee, and your T-Mobile phone signal is already strong at home.

5. Verizon 5G Home: best for existing Verizon mobile customers

Quick facts

Why it works for Verizon households

Add a Verizon postpaid mobile phone plan and the 5G Home bill drops to $35 a month, with the base rate locked for three years. Verizon says its 5G Home pricing is all-in, with no hidden taxes and fees.

Caveats to note

• Availability: 5G Home availability varies by address, and the plan is subject to credit approval.
• Phone plan rules: the mobile discount excludes business and data-only plans.

Pick Verizon 5G Home when you already pay for a Verizon phone line. If not, compare the $60 stand-alone rate with a wired plan first.

Other providers to check

Not every Charleston address fits the “cheapest” list. These options cost more today or cover fewer streets, but they are worth a check.

IQ Fiber: IQ Fiber runs a local operations center in Charleston. Its plans start at $65 a month for 250 Mbps with symmetrical speeds, and the company says it never charges for installation or equipment. Run your exact address, because fiber builds go street by street.

Starlink (satellite): It usually costs more than the five main plans, but for rural edges and islands where cable and 5G are not available, it can be the fallback.

What the five plans cost over 24 months

These are simple estimates from the published monthly prices. Taxes, one-time fees and optional add-ons are not included. The WOW! figures use its “from $30” starting price; the price for your speed and address can be higher.

Charleston neighborhood notes

Provider maps can make Charleston look uniformly covered, but results change by address.

West Ashley, James Island and Mount Pleasant: WOW! names these areas on its Charleston page, so start with a WOW! address check here, then compare AT&T and Xfinity. If you are on the move between the peninsula and Mount Pleasant, check both addresses before you choose.

Downtown peninsula and North Charleston: Check WOW!, Xfinity and AT&T, and keep T-Mobile or Verizon 5G as a backup option.

Johns Island, Wadmalaw and the barrier islands: Wired options can thin out. When every checker says no, a 5G gateway or Starlink is the fallback.

Two houses on the same street can get different results. Take a screenshot of each provider’s address check before you schedule an install.

Which plan fits you?

• WOW! Internet: lowest starting price. Speeds from $30 a month with a WiFi modem included; add $5 a month if you want the Price Lock for Life.
• AT&T Fiber 300: fiber on a budget. $35 a month for the first year, then $50.
• Xfinity 300 Mbps: one price for five years. $45 a month with WiFi equipment included, for new customers before the offer ends.
• T-Mobile Rely: simple wireless setup. $50 a month, or $35 with an eligible T-Mobile voice line, with a five-year price guarantee.
• Verizon 5G Home: for Verizon families. $35 a month with an eligible Verizon phone plan and a three-year guarantee; $60 stand-alone.

Hidden-fee checklist before you click “Order”

1. Is the price stand-alone? Some prices assume a mobile line, AutoPay or paperless billing.
2. Which payment types keep the AutoPay discount? AT&T and Xfinity tie the advertised price to specific payment methods.
3. When does the promo end? AT&T’s $15 discount lasts 12 months. If no regular rate appears, ask before you order.
4. Is the modem or gateway included? All five plans include it, but mesh WiFi and price-lock add-ons can raise the bill.
5. Any installation or activation fee? WOW! offers a free self-install kit. Check the checkout summary for one-time charges from the others.
6. What is the data policy? Unlimited 5G data can still slow down when the network is busy.
7. What are the equipment-return rules? Ask how to return the equipment if you cancel, and keep the shipping receipt.

Affordable internet after the ACP

The federal Affordable Connectivity Program (ACP) ended on June 1, 2024, because Congress did not add more funding. The FCC warns that some provider websites still have not been updated.

Charleston residents still have low-income options:

Eligibility rules differ. Some programs check household income, and others check participation in programs such as SNAP or Medicaid. Apply on the provider’s assistance page with proof of eligibility.

How to shop without losing a day

1. Enter the exact service address. Street number, unit and ZIP code matter more than the city name.
2. Screenshot the checkout summary and broadband label. Capture the monthly charge, the equipment line and any scheduled price change.
3. Compare three points in time: month 1, month 13 and month 24.
4. Test fixed wireless before you cancel cable. Use the trial period to check speeds at busy times.
5. Return old equipment on time. Ship it with tracking and keep the receipt.

Conclusion

The cheapest home internet in Charleston depends on your street and on what the bill looks like after the first year. WOW! has the lowest advertised starting price where it is available, with a WiFi modem included and an optional Price Lock for Life. AT&T is the cheapest way into fiber, Xfinity offers a five-year price, and T-Mobile and Verizon make sense when you already have their phone service. Count the equipment, compare two-year totals, run the address checker and choose the plan that fits how long you plan to stay.