Published
Idaho Mortgage Calculator: What a Payment Really Looks Like in Eastern Idaho
The sourced inputs
- 6.76% — average 30-year fixed mortgage rate, U.S. (Freddie Mac PMMS via FRED, week of September 10, 2026)
- $633,950 — median listing price, Rexburg metro area (Madison + Fremont counties), up from $599,500 a year earlier (Realtor.com via FRED, August 2026)
- $398,911 — Zillow's modeled typical home value for the city of Idaho Falls (ZHVI — an estimate, not a sale record; up 1.0% from a year earlier) (Zillow Research, July 2026)
- $434,801 — Zillow's modeled typical home value for the city of Rexburg (ZHVI — an estimate, not a sale record; up 5.0% from a year earlier) (Zillow Research, July 2026)
- $285,762 — Zillow's modeled typical home value for the city of St. Anthony (ZHVI — an estimate, not a sale record; up 3.6% from a year earlier) (Zillow Research, July 2026)
What those prices cost per month
Principal and interest only, 30-year term, computed at the sourced average rate from the sourced values above — this site's arithmetic, rounded, with taxes, insurance and any HOA on top:
Run the payment before you fall in love with a house. It is a five-minute conversation and it decides which listings are even worth walking through.
— Kjel Jones, Licensed Real Estate Agent (Idaho), LPT Realty, 2026
| Market figure | 10% down | 20% down |
|---|---|---|
| Metro median list price (Madison + Fremont) | ≈ $3,622/mo | ≈ $3,219/mo |
| Idaho Falls typical value | ≈ $2,308/mo | ≈ $2,051/mo |
| Rexburg typical value | ≈ $2,505/mo | ≈ $2,227/mo |
| St. Anthony typical value | ≈ $1,655/mo | ≈ $1,471/mo |
The shortcut worth memorizing: about $643 a month per $100,000 borrowed at the current average rate. It prices any listing in your head faster than any widget, and it makes rate changes legible — a quarter-point move shifts roughly $17 per $100,000.
Payment to income, honestly
Lenders test total debts against gross income; most eastern Idaho programs cap around 45%, and the old 28% housing-only guideline remains a sane personal ceiling. Worked example: a $450,000 loan runs about $2,892 a month in principal and interest, which the 28% guideline supports at roughly $124,000 of gross income — before property taxes, insurance, and every other debt you carry. Your Loan Estimate is the binding version; the buying page covers getting one early, and the fees page explains the costs beside the payment.
About Kjel Jones
Kjel Jones is a licensed Idaho real estate agent (license SP49090, verifiable at irec.idaho.gov), licensed since 2018 with around fifty closed transactions. He was born in Idaho Falls, raised in Rexburg, and has lived in eastern Idaho his whole life. His sweet spot is single-family homes within about an hour of Rexburg. “Kjel Jones Real Estate” by LPT Realty — call or text (208) 346-0163, or send a question.
Common questions
What’s the average mortgage payment in Idaho?
No agency publishes an official average, so this site computes instead: at the current average 30-year rate, the typical Idaho Falls home with 10% down runs about $2,308 a month in principal and interest, the Rexburg equivalent about $2,505, and St. Anthony about $1,655 — arithmetic from sourced values, not survey claims.
Can a 70 year old woman get a 30-year mortgage?
Yes. Federal law — the Equal Credit Opportunity Act — bars lenders from denying credit or shortening terms because of age. Qualification runs on income, debts and credit exactly as at any age, and retirement or Social Security income counts. No lender may steer you to a 15-year term for being 70.
What salary do you need for a $450,000 mortgage?
A $450,000 loan at the current average rate costs about $2,892 a month in principal and interest. The common 28% housing guideline supports that at roughly $124,000 gross; lenders’ 45% total-debt ceilings can stretch further if you carry little other debt. Taxes and insurance push the real requirement higher.
How much are closing costs on a $400,000 house?
Separate from the payment and set by your lender and loan type — origination, title, escrow, recording and prepaids. There is no honest flat percentage; comparing Loan Estimates from two or three lenders is the only calculator that reflects your actual deal. The closing-costs page on this site walks the line items.
Who pays most of the closing cost?
Each side pays its own stack: buyers carry the lender-related and prepaid items, sellers the owner’s title policy and their agreed commissions. In 2026’s slower market, buyers regularly negotiate seller contributions toward their side — it is a contract term, not a rule.
Do realtors make money off closing costs?
No — agent compensation is set separately in written buyer and listing agreements, not in the lender’s closing-cost stack. Both appear on your settlement statement, which is why they get confused. The fees page on this site explains exactly how its author is paid.