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St. Mary's 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. Mary's County, Maryland based on real HMDA transaction records.

Loan Details

St. Mary's County, MD Benchmarks

Conventional averages
Typical Property Value$523,135
Average Down Payment22.1%
Average Interest Rate7.537%
Effective Tax Rate0.77%
Median Tax Paid$3,424/yr
Tax Growth (Historical)-2.1%
Based on 1,748 regional loans totaling $411,800,000 (HMDA database).
$
%

$115,613 down · $407,522 financed

%
yrs
$

Paid directly to principal

Payoff estimated June 2056

Local & Recurring Costs

%

$336 / month

$

Annual premium

$

Per month

%

Not required at 20%+ down

Estimated Monthly Payment

$3,346/mo

  • Principal & Interest$2,861
  • Property Tax$336
  • Home Insurance$150
Amortization · Remaining Balance

Loan Amount

$407,522

Total Interest

$622,303

Total of Payments

$1,029,825

Local Market Insights

St. Mary's County Conventional Mortgage Overview

In St. Mary's County, the 22.05% average down payment for Conventional loans indicates strong buyer credit and equity, allowing most to avoid Private Mortgage Insurance (PMI). With a median 77.95% Loan-to-Value (LTV) ratio, buyers typically need to build just over 2% additional equity to reach the 20% threshold required for PMI cancellation. The effective 0.77% property tax rate, combined with a recent -2.1% inflation-adjusted tax change, slightly reduces monthly carrying costs. For those exploring a Conventional loan with taxes in St. Mary’s County, MD, this lower tax burden improves true affordability for owner-occupied homes.

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.