$800K Refinance Scenarios
$800K mortgage refinance scenarios — jumbo loan assumptions
| From Rate | To Rate | Monthly Savings | Closing Costs | Break-Even | 5-Year Savings |
|---|---|---|---|---|---|
| 7.5% | 6.8% | $397/mo | $18,000 | 45 months | $5,820 |
| 7.5% | 6.5% | $536/mo | $18,000 | 34 months | $14,160 |
| 7.0% | 6.2% | $421/mo | $18,000 | 43 months | $7,260 |
Jumbo refinance requirements in 2025 typically include: 720+ credit score (740+ preferred), 20–30% home equity, 6–12 months of reserves (PITI payments in liquid assets), DTI below 43%, and documented income with 2 years of tax returns. Underwriting is more stringent than conforming loans.
Jumbo vs. Conforming Rate Premium
In 2025, jumbo mortgage rates run 0.1–0.5% above conforming loan rates for well-qualified borrowers. The spread varies: during periods of market stress, jumbo spreads widen. The jumbo rate premium has narrowed in recent years as more lenders have entered the jumbo market.
Portfolio Lenders for Jumbo Refinancing
For jumbo refinances, portfolio lenders (banks that hold loans on their own balance sheets rather than selling to Fannie/Freddie) often offer more competitive rates and flexible underwriting. Private banks, regional banks, and credit unions serving high-net-worth clients are worth comparing against traditional mortgage lenders.
Calculate Your Jumbo Refinance Numbers
Large loan, large decision. Calculate before committing.