Natrona County Mortgage Calculator

Natrona County mortgage calculator: plan the whole payment

Natrona County, in the middle of Wyoming, centers on Casper, the state's second-largest city, along with Mills, Evansville, Bar Nunn, Midwest, and Edgerton. Buyers range from first-time buyers in town to families looking for acreage around Casper Mountain and along the North Platte River. This page gives you current Natrona County numbers, a worked example near the local median, and the Wyoming tax and loan rules that belong in any honest estimate. Summit Lending LLC (NMLS 2394434) is a mortgage broker based in Garland, Utah. We compare loans from multiple wholesale lenders and can turn your calculator result into a real quote for a home in Natrona County.

Ready to shop? Start a Natrona County preapproval, or read about Natrona County purchase loans.

Summit Lending LLC, NMLS 2394434, is based at 4542 W 14800 N, Garland, UT 84312 and serves borrowers in Utah, Texas, Idaho, Wyoming, Arkansas, and Arizona. Call 385-200-1470 or email [email protected].

Natrona County numbers to start with

Redfin put the Natrona County median sale price at about $364,000 for the three months ending September 2026, up 13.1% from the same period a year earlier. Redfin counted about 122 homes sold in September, compared with 119 a year earlier, and homes took a median of about 36 days to sell, versus 36 days last year, with an average sale-to-list ratio near 98.6% (Redfin Natrona County data). Prices are up about 13% from a year ago, homes still sell in about five weeks, slightly more homes sold than last September, and the average home sells about 1.4% under list.

For the wider area, see Casper, Evansville, Midwest, and Edgerton, or Converse County to the east. Homes outside Casper often sit on acreage with a well and septic system, which adds inspection and appraisal steps. Redfin's climate data rates nearly every property in the county as having some wildfire risk over the next 30 years, so get an insurance quote early.

Rates set the base of every estimate. Freddie Mac's weekly survey put the average 30-year fixed rate at 7.40% as of October 15, 2026, unchanged from the week before and up from 6.27% a year ago. The 15-year average was 6.71%, down slightly from 6.73% a week earlier (Freddie Mac PMMS, Oct 15, 2026; weekly history in the PMMS archive and on FRED). Those are national averages for borrowers with strong credit and roughly 20% down, not Natrona County quotes. Freddie Mac publishes a new reading every Thursday, so if you are running numbers a few weeks from now, update the rate first.

What goes into a Natrona County payment

• Principal and interest. The calculator's core result, set by price, down payment, rate, and term.
• Property tax. Wyoming has relatively low property tax rates, and owner-occupied homes can qualify for the 25% homeowner exemption from SF0069.
• Homeowners insurance. Ask about wind and hail coverage and deductibles, which matter on the open plains. Rural homes can also cost more to insure because of wildfire exposure and distance from a fire station.
• Mortgage insurance. PMI on conventional loans with less than 20% down, or FHA's annual premium.
• HOA dues. Less common than in bigger metros, though some newer subdivisions around Casper have them.

Wyoming property tax and the 2025 homeowner exemption

Wyoming lawmakers passed Senate File 69 in 2025, creating a homeowner exemption equal to 25% of fair market value on the first $1,000,000 of value for an owner-occupied single-family home (SF0069 enrolled act). To qualify, the owner must have lived in the home for at least eight months of the year and file an affidavit. The Wyoming Department of Revenue explains the filing process and timing for each tax year (Wyoming homeowner exemption). On a $365,000 home, 25% of value is about $91,250 that would not be taxed once you qualify.

For the calculator, this means two things. First, a listing that shows the seller's tax bill may already include the exemption, which you would only receive once you qualify. Second, your first year of escrow might be estimated without it. We check this with you so the payment does not jump unexpectedly after the first escrow analysis.

Worked example: a $365,000 home in Natrona County

Take a $365,000 home near the Natrona County median with 10% down. The loan is $328,500. At 7.40%, principal and interest on a 30-year fixed is about $2,274 a month. At last year's 6.27%, the same loan would have been about $2,027, so the rate change alone adds about $247 a month.

A 15-year fixed at 6.71% raises the payment to about $2,900, while total interest drops to about $193,437, compared with about $490,308 over 30 years at 7.40%. Add tax, insurance, PMI, and HOA dues for the full number. If it is more than you want to carry, compare a lower price point, a larger down payment, a temporary or permanent rate buydown paid by the seller, or WCDA down payment assistance.

How the loan type changes your Natrona County result

Most online calculators assume a conventional loan with a fixed rate, which can make the number look better or worse than what you would actually get. Here is how the same $365,000 Natrona County home changes by program, using the 7.40% survey average as a stand-in rate. Your actual rate will differ by program and profile.

Conventional

Qualified buyers can put as little as 3% down on a one-unit primary home, which is $10,950 on $365,000 (Fannie Mae eligibility matrix). Below 20% down you pay private mortgage insurance, and you can ask to cancel it once the balance reaches 80% of the original value (CFPB on PMI). PMI is priced by credit score and down payment, so add it as a separate line in the calculator rather than guessing.

FHA

FHA requires 3.5% down with a 580 or higher score (HUD FHA overview). It also adds two insurance costs a basic calculator often skips: an upfront premium of 1.75% that is usually financed into the loan, and an annual premium paid monthly. For a base loan of $726,200 or less with more than 95% loan-to-value, the annual rate is 0.55% (HUD Mortgagee Letter 2023-05). On $365,000 with 3.5% down, the base loan is $352,225, the upfront premium adds $6,164, and principal and interest on $358,389 is about $2,481 at 7.40%. The monthly premium adds roughly $161, for about $2,643 before taxes and insurance. The 2026 FHA one-unit limit in Natrona County is $541,287, the national floor, so this price fits with plenty of room.

VA

Eligible veterans and service members can buy with no down payment and no monthly mortgage insurance (VA purchase loans). A one-time funding fee applies unless you are exempt, and for first use with less than 5% down it is 2.15% of the loan (VA funding fee). Financing that fee on $365,000 brings the loan to about $372,848, with principal and interest near $2,582 at 7.40%.

USDA

USDA guaranteed loans allow no down payment in eligible rural areas for households under the income limits (USDA guaranteed loans). Casper is generally not eligible, but rural parts of the county and some smaller towns can be. Check an address on the USDA eligibility map before you count on it.

2026 loan limits in Natrona County

The 2026 conforming loan limit for a one-unit home in Natrona County is $832,750 (FHFA announcement, FHFA county file). The FHA one-unit limit is $541,287, the 2026 national floor for the Casper metro (HUD announcement, HUD lookup). Above $832,750 you need a jumbo loan, which is uncommon at Natrona County prices.

Down payment help in Wyoming

The Wyoming Community Development Authority (WCDA) offers down payment assistance of up to $15,000 through participating lenders, with a 620 minimum credit score and a $1,500 minimum borrower contribution, and it also has a Home$tretch option at 0% interest for eligible buyers (WCDA homebuyers). Price and income limits apply by county (WCDA limits). If you plan to use assistance, add it as part of your down payment in the calculator, and remember that a repayable second loan adds its own monthly payment. Our Natrona County first-time home buyer guide walks through it.

From a calculator estimate to a real number

1. Run a few scenarios here. Try two prices, two down payments, and both a 30-year and 15-year term so you know your range.
2. Get preapproved. A preapproval means a lender checked your credit, income, and assets. The CFPB points out that lenders use the terms prequalification and preapproval differently, so ask what was verified (CFPB comparison). Several mortgage credit checks within 45 days count as one inquiry for most scoring models, so shopping does not hurt your score more than once (CFPB on credit checks).
3. Compare Loan Estimates. Lenders must send a Loan Estimate within three business days of your application, and the standard format makes side-by-side comparison easy (CFPB on Loan Estimates).
4. Watch your debt-to-income ratio. Lenders compare your monthly debts, including the new payment, to gross monthly income (CFPB on DTI). A payment that fits your budget can still be too high for a program limit, or the reverse.
5. Check the final numbers. Your Closing Disclosure arrives at least three business days before closing. Compare it to your Loan Estimate line by line (CFPB on Closing Disclosures).

Calculators for nearby areas

Central Wyoming: Casper, Evansville, Midwest, Edgerton, Converse County, and Glenrock. Elsewhere in Wyoming: Cheyenne, Laramie County, and Gillette. Or use the statewide Wyoming mortgage calculator.

Related pages

See the Natrona County mortgage overview, Natrona County refinancing, Natrona County construction loans, Natrona County reverse mortgages, and Natrona County commercial loans. Statewide, compare Wyoming mortgage loans, Wyoming purchase loans, Wyoming refinancing, Wyoming preapproval, Wyoming mortgage calculator.

Sources

• Redfin, Natrona County, WY housing market
• Redfin, Wyoming housing market
• Freddie Mac Primary Mortgage Market Survey, October 15, 2026
• Freddie Mac PMMS archive
• FRED, 30-Year Fixed Rate Mortgage Average
• Wyoming SF0069 (2025), homeowner tax exemption (PDF)
• Wyoming Department of Revenue, homeowner exemption
• Fannie Mae Eligibility Matrix
• CFPB, private mortgage insurance
• HUD, Let FHA loans help you
• HUD Mortgagee Letter 2023-05, FHA annual MIP (PDF)
• VA purchase loan
• VA funding fee and closing costs
• USDA Single Family Housing Guaranteed Loan Program
• USDA property eligibility map
• FHFA, 2026 conforming loan limits
• FHFA 2026 county loan limit list
• HUD No. 25-145, 2026 FHA loan limits
• HUD FHA mortgage limits lookup
• Wyoming Community Development Authority, homebuyers
• WCDA purchase price and income limits
• CFPB, prequalification vs. preapproval
• CFPB, when a lender checks your credit
• CFPB, What is a Loan Estimate?
• CFPB, debt-to-income ratio
• CFPB, What is a Closing Disclosure?

Information on this page is for general education and is current as of October 2026. It is not a commitment to lend or a rate quote. Program rules, limits, and availability change, and approval depends on your credit, income, assets, property, and lender guidelines. Summit Lending LLC, NMLS 2394434. Equal Housing Opportunity.