Mortgage Refinance Rates in Saint Louis
Compare mortgage refinance rates from credit unions serving Saint Louis, Missouri. Today's best tracked refi rate: 5.900% APR. Zero affiliate bias — rates ranked by true cost.
Saint Louis mortgage refinance rates from credit unions start at 5.900% APR (median 6.750% APR across the top 5 offers), updated August 2026.
Source: RateAPI.dev
Top Credit Unions for Saint Louis Refinancing
Ranked by lowest APR. Based on a $400,000 refinance over 30 years.
| Credit Union | Rate | APR | Est. Payment | |
|---|---|---|---|---|
R G Credit Union 30-Year Fixed | 5.9% | 5.9% | $2,373/mo | Visit Site |
Infuze Credit Union Conventional Fixed Rate (10 - 30 Years) | 6.25% | 6.25% | $2,463/mo | Visit Site |
Together Credit Union 30-Year Fixed | 6.75% | 6.75% | $2,594/mo | Visit Site |
Riverways Credit Union 30-Year Fixed | 6.875% | 6.875% | $2,628/mo | Visit Site |
Volt Credit Union 30-Year Fixed | 6.875% | 6.961% | $2,651/mo | Visit Site |
When Refinancing Makes Sense in Saint Louis
Refinancing replaces your current mortgage with a new one — ideally at a lower rate or shorter term. The key question is whether monthly savings recoup closing costs before you move.
Check Your Break-Even
Divide closing costs by monthly savings. Under ~24 months is generally worthwhile. Use the break-even calculator.
Compare Credit Unions
Credit unions serving Saint Louis often undercut bank refi rates by 0.25–0.50%. Compare at least 3–5 lenders.
Mind Your LTV and Credit
Lower loan-to-value and a score above 740 unlock the best refinance pricing. Cash-out refis price higher than rate-and-term.
Weigh Term Changes
Refinancing into a 15-year term raises the payment but cuts total interest. A shorter term often carries a lower rate.
Credit Unions Based in Saint Louis
6 credit unions are headquartered in Saint Louis. Local membership is often the easiest to qualify for — many accept anyone who lives or works in the area.
Frequently Asked Questions
Common questions about refinancing in Saint Louis
As of August 2026, tracked mortgage refinance rates from credit unions serving Saint Louis, Missouri start at 5.900% APR, with a median of 6.750% APR across the top offers. Rates vary by credit score, loan-to-value, and whether you take cash out.
Refinancing makes sense when the new rate is low enough that your monthly savings recoup closing costs before you sell or move — a common rule of thumb is a break-even under 24 months. Use the refinance break-even calculator, then compare credit union offers serving Saint Louis.
Credit unions serving Saint Louis, Missouri frequently beat bank refinance rates because they are member-owned non-profits that return savings through lower rates and fees. Comparing several lenders is the single biggest lever on your refinance cost.
Yes. RateAPI provides daily-updated Missouri mortgage and refinance rates through a REST API and MCP server, so fintech apps, comparison sites, and AI agents can query credit union rates programmatically.
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