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St. Louis County Conventional Mortgage Calculator

Adjust the sliders to model your loan in real time. We have prefilled this page with local benchmark averages for St. Louis County, Missouri based on real HMDA transaction records.

Loan Details

St. Louis County, MO Benchmarks

Conventional averages
Typical Property Value$478,414
Average Down Payment24.5%
Average Interest Rate6.766%
Effective Tax Rate1.14%
Median Tax Paid$3,335/yr
Tax Growth (Historical)+1.3%
Based on 19,913 regional loans totaling $4,987,685,000 (HMDA database).
$
%

$117,211 down · $361,203 financed

%
yrs
$

Paid directly to principal

Payoff estimated June 2056

Local & Recurring Costs

%

$454 / month

$

Annual premium

$

Per month

%

Not required at 20%+ down

Estimated Monthly Payment

$2,952/mo

  • Principal & Interest$2,348
  • Property Tax$454
  • Home Insurance$150
Amortization · Remaining Balance

Loan Amount

$361,203

Total Interest

$483,918

Total of Payments

$845,121

Local Market Insights

St. Louis County Conventional Mortgage Overview

In St. Louis County, the 24.48% average down payment on a Conventional loan signals strong buyer credit and equity, allowing most to avoid private mortgage insurance (PMI) entirely. With a median loan-to-value (LTV) of 75.52%, borrowers are already well past the 20% equity threshold. For those using a conventional mortgage with taxes in St. Louis County, MO, the effective property tax rate of 1.14% adds roughly $455 monthly on a $478,414 home. The recent 1.3% inflation-adjusted tax shift means slight annual increases. This data, representing 100% primary residences, shows a low-risk market where conventional mortgage options with PMI and taxes are manageable for qualified buyers.

Disclaimer: This calculator provides estimates for educational purposes only and does not constitute a loan offer or financial advice. Actual rates, taxes, insurance, and fees will vary.