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30-Year Fixed Jumbo Mortgage Refinance Interest Rates in Boise, ID

Explore 30-year jumbo mortgage interest rates in Boise, ID over time.

As of Apr 7, 2026
Idaho Avg

6.844%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 Boise, Idaho

Showing results for: 30-Year Fixed refinance offers for Single Family or Townhome properties in ID, 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 Boise's Hot Market with 9.4% Appreciation?

With Boise's strong 9.4% appreciation rate and median home values at $275,000, 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 Boise also creates opportunities for jumbo cash-out refinancing to access built-up wealth.

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

The savings on jumbo refinances are substantial due to large loan amounts. For a typical $800,000 jumbo loan in Boise (80% LTV on $275,000 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 Boise's hot market with 9.4% annual appreciation, homeowners typically refinance when equity gains justify eliminating PMI or accessing cash for improvements.

What Are Jumbo Cash-Out Refinance Options in Boise?

Boise's 9.4% appreciation creates significant equity-access opportunities through jumbo cash-out refinancing. If your home appreciated to $275,000 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 Boise's property taxes at 0.63% ($144/month), factor PITI into affordability calculations when refinancing.

Do Jumbo Refinance Rates in Boise Differ from Conforming Rates?

Yes. Jumbo loans in Boise (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 Boise's median home value of $275,000, 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 Boise?

Jumbo refinance interest remains tax-deductible up to the first $750,000 of mortgage debt ($375,000 if married filing separately). For Boise homeowners with $800,000jumbo loans, interest on the excess amount isn't deductible. However, with Boise's 0.63% property tax rate ($144/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 Boise jumbo refinance strategy, especially given the $275,000 median home values and high loan amounts involved.

Jumbo Loan Refinancing Strategy in Boise

Boise is a fantastic market for buyers, meaning many of you started out with an FHA loan. Refinancing relies heavily on your Loan-to-Value (LTV) ratio.

With your home value growing 9.4%, you are steadily building equity. Once your principal payments and market growth push your LTV under 80%, refinancing into a standard Conventional loan will permanently remove your FHA mortgage insurance premium.

Property Tax Tip for Boise Homeowners

Because housing costs here are manageable, consider rolling your closing costs into the new loan. This allows you to secure a better interest rate without having to drain your savings account at closing.

Hero & Housing Programs for Boise

Look into the Idaho Housing and Finance Association (IHFA). Their programs are designed to keep long-term homeownership deeply affordable across the state.


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