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30-Year Fixed Jumbo Mortgage Refinance Interest Rates in Sumter, SC

Explore 30-year jumbo mortgage interest rates in Sumter, SC over time.

As of Apr 7, 2026
South Carolina Avg

6.837%6.84%

-0.07% · 1wk
National Avg

6.862%6.86%

-0.06% · 1wk

Timeframe

30-jumbo Year Fixed Mortgage Interest Rates

Daily refinance averages provided by the Mortgage Research Center.


Compare mortgage rates in Sumter, South Carolina

Showing results for: 30-Year Fixed refinance offers for Single Family or Townhome properties in SC, total loan amount of $800,000.

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Mortgage Rate Company

Rate data provided by RateUpdate.com. Displayed by Mortgage Research Center, NMLS #1907, Equal Housing Opportunity. Rates and fees are estimates and subject to change without notice. Payments do not include taxes and insurance premiums. Actual payments may be higher. Not all lenders participate in this marketplace. Loan availability and terms may vary by state and lender. Lender offers, including badges like “Lowest APR” or “Lowest Payment,” are based only on results displayed here and may not reflect the absolute lowest offer available in the market. Rate and product details


Should I Refinance My Jumbo Mortgage in Sumter's Hot Market with 17.6% Appreciation?

With Sumter's strong 17.6% appreciation rate and median home values at $140,700, homeowners have likely built substantial equity. For jumbo mortgages (loans exceeding $806,500), refinancing when rates drop by 0.75-1% or more typically makes financial sense. On a $800,000 jumbo loan, refinancing from 7% to 6% saves $526/month ($6,312/year). With jumbo refinance closing costs around $20,000, you'd break even in 38 months. The rapid equity growth in Sumter also creates opportunities for jumbo cash-out refinancing to access built-up wealth.

How Much Can I Save Refinancing a Jumbo Loan in Sumter?

The savings on jumbo refinances are substantial due to large loan amounts. For a typical $800,000 jumbo loan in Sumter (80% LTV on $140,700 median homes), reducing your rate from 7% to 6% saves $526monthly. Over the 30-year life, that's $189k in total interest savings. Even after $20,000 closing costs (2.5% of loan amount), you're ahead after just 38 months. In Sumter's hot market with 17.6% annual appreciation, homeowners typically refinance when equity gains justify eliminating PMI or accessing cash for improvements.

What Are Jumbo Cash-Out Refinance Options in Sumter?

Sumter's 17.6% appreciation creates significant equity-access opportunities through jumbo cash-out refinancing. If your home appreciated to $140,700 and you tap 20% equity ($200,000), your new loan becomes $1,000,000 at approximately 6.5% (cash-out rates typically run 0.25-0.5% higher). Monthly payment: $6,321. Jumbo cash-out proceeds are commonly used for investment properties, major renovations, debt consolidation, or business ventures. With Sumter's property taxes at 0.57% ($67/month), factor PITI into affordability calculations when refinancing.

Do Jumbo Refinance Rates in Sumter Differ from Conforming Rates?

Yes. Jumbo loans in Sumter (any loan exceeding $806,500) typically carry rates 0.25-0.75% higher than conforming loans due to increased lender risk. However, borrowers with excellent credit (740+), low debt-to-income ratios (under 43%), and substantial reserves (6-12 months) can secure competitive jumbo rates. For Sumter's median home value of $140,700, an 80% LTV loan ($800,000) is near the jumbo threshold. Shop multiple lenders-portfolio lenders and credit unions sometimes offer better jumbo refinance rates than big banks. Rate differences compound over time: 0.5% higher on $800,000 costs ~$261/month extra.

What Are the Tax Implications of Jumbo Refinancing in Sumter?

Jumbo refinance interest remains tax-deductible up to the first $750,000 of mortgage debt ($375,000 if married filing separately). For Sumter homeowners with $800,000jumbo loans, interest on the excess amount isn't deductible. However, with Sumter's 0.57% property tax rate ($67/month on median homes), combined property tax and mortgage interest deductions can still significantly reduce taxable income. Cash-out refinance proceeds are generally not taxable as income. If using cash-out funds for home improvements, that interest may also be deductible. Consult a tax professional to optimize your Sumter jumbo refinance strategy, especially given the $140,700 median home values and high loan amounts involved.

Jumbo Loan Refinancing Strategy in Sumter

Let’s talk about that incredible 17.6% appreciation rate. Your Loan-to-Value (LTV) measures how much you owe versus what the home is worth.

Sumter is a fantastic market for buyers, meaning many of you started out with an FHA loan. With values up over 17%, you are steadily building massive equity. Once your principal payments and market growth push your LTV under 80%, refinancing from an FHA loan into a standard Conventional loan permanently removes your mortgage insurance premium.

Property Tax Tip for Sumter Homeowners

A sub-$900 tax bill keeps your escrow very low. Focus your refinance strategy entirely on securing the lowest possible interest rate or using a cash-out refinance to consolidate high-interest credit cards.

State & Local Assistance in Sumter

Leverage SC Housing. Look into the "Palmetto Heroes" program if you are active military at Shaw AFB; they offer discounted interest rates specifically for those who serve.


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