Reliant Home Funding Editorial Team

NMLS #292473Licensed in 27 statesUpdated November 5, 2026

Reviewed for accuracy by senior mortgage advisors • Rates verified against Freddie Mac PMMS®

Conventional 15-Year Mortgage Rates and Strategies in Charleston, SC

As of May 21, 2026, according to Freddie Mac's Primary Mortgage Market Survey (PMMS®), the average 15-year fixed-rate mortgage in the United States is 5.71%. Data as of May 21, 2026, according to Freddie Mac PMMS®. (freddiemac.com) While this national average provides a general benchmark, mortgage rates can vary based on location, loan amount, and individual borrower qualifications.

Today's Mortgage Rates in Charleston

In Charleston, South Carolina, the housing market is dynamic, with median home prices around $525,000. For prime borrowers—those with credit scores of 700 or higher, established income, and substantial down payments—conventional 15-year fixed-rate mortgages are a strategic option to pay off your home faster and save on interest.

Loan Type	Interest Rate	Week-Over-Week Change
30-Year Fixed	6.36%	+0.05%
15-Year Fixed	5.71%	+0.03%

Data as of May 21, 2026, according to Freddie Mac PMMS®. (freddiemac.com)

What Prime Buyers in Charleston Should Know

Charleston's real estate market offers unique opportunities for prime borrowers. Here are key considerations:

Loan Limits: The 2026 conforming loan limit in high-cost areas like Charleston is $806,500. Loans above this amount may require a high-balance conforming loan or a jumbo loan.
Home Prices: With median home prices around $525,000, many buyers find that a 15-year fixed-rate mortgage aligns well with their financial goals.
Down Payments: A down payment of 10% to 20% is typical among prime borrowers, which can help secure favorable rates.
Credit Scores: Maintaining a credit score of 700 or higher is crucial for accessing the best mortgage rates.

Pro Tip: Opting for a 15-year fixed-rate mortgage can significantly reduce the total interest paid over the life of the loan, making it an excellent choice for financially stable borrowers aiming to pay off their homes faster.

Rate Strategy for Charleston Buyers

To maximize the benefits of a 15-year fixed-rate mortgage in Charleston, consider the following strategies:

Assess Your Financial Readiness: Ensure you have a stable income and sufficient savings to handle the higher monthly payments associated with a 15-year term.
Evaluate Your Long-Term Plans: If you plan to stay in your home for a significant period, a 15-year mortgage can be advantageous.
Compare Lenders: Shop around to find competitive rates and favorable terms from various lenders.
Consider Refinancing: If you currently have a longer-term mortgage, refinancing to a 15-year fixed-rate mortgage can lead to substantial interest savings.
Consult a Mortgage Professional: Engage with a local mortgage advisor to understand how a 15-year mortgage fits into your overall financial strategy.

Charleston-Specific Considerations

When considering a 15-year fixed-rate mortgage in Charleston, keep these local factors in mind:

Loan Limits: The conforming loan limit in Charleston County is $806,500. Loans exceeding this amount may require a high-balance conforming loan or a jumbo loan.
Home Prices: With median home prices around $525,000, many buyers find that a 15-year fixed-rate mortgage aligns well with their financial goals.
Prime Borrower Advantages: Prime borrowers in Charleston often benefit from competitive rates and favorable loan terms due to their strong financial profiles.

Frequently Asked Questions

What is the conforming loan limit in Charleston, SC?

The conforming loan limit in Charleston County for 2026 is $806,500. (freddiemac.com)

How does a 15-year fixed-rate mortgage differ from a 30-year mortgage?

A 15-year fixed-rate mortgage offers a shorter term with higher monthly payments but lower overall interest costs compared to a 30-year mortgage.

Is a 15-year mortgage suitable for first-time buyers in Charleston?

While a 15-year mortgage can be beneficial, first-time buyers should assess their financial stability and long-term plans to determine if this option aligns with their goals.

What are the benefits of refinancing to a 15-year fixed-rate mortgage?

Refinancing to a 15-year mortgage can lead to significant interest savings and help you pay off your home faster.

How can I apply for a 15-year fixed-rate mortgage in Charleston?

You can apply online through lenders licensed in South Carolina, such as Reliant Home Funding, which offers a secure online portal for a convenient application process.

For competitive rates in Charleston, consider Reliant Home Funding (NMLS #292473). Compare today's rates →

In conclusion, a 15-year fixed-rate mortgage can be a strategic choice for prime borrowers in Charleston aiming to pay off their homes faster and save on interest. Assess your financial readiness, consider local market conditions, and consult with a mortgage professional to determine if this option aligns with your financial goals.

Reliant Home Funding is licensed in South Carolina and experienced with the Charleston market, offering tailored solutions for homebuyers in the area.

Compliance Disclaimer: South Carolina-BFI Mortgage Lender/Servicer License # MLS-292473. Reliant Home Funding, Inc. NMLS #292473. Equal Housing Lender. Licensed in South Carolina. Loans subject to credit approval, property evaluation, and borrower qualifications. All rates and program guidelines subject to change without notice. Rate locks can only occur after a full application is submitted. Rates and terms may change. NMLS #292473.