North Dakota Mortgage Calculator

North Dakota’s Two-Step Ratio: Why Only 4.5% of Your Home’s Value Gets Taxed

North Dakota runs its property tax math through two separate ratios stacked on top of each other, a structure genuinely unlike anything else in this calculator series. First, the county assessor sets your home’s “true and full value,” essentially market value, then applies a statutory 50% ratio to get assessed value. Second, residential property gets a further 9% ratio applied to that assessed value to arrive at taxable value. Run the math and the two ratios combine to a simple result: only 4.5% of your home’s actual market value is ever subject to a mill rate. It’s why North Dakota’s mill rates look enormous compared to other states, commonly 200 to 300 mills or more, while the real effective tax rate on your home’s actual value lands close to or just above the national average.

Cass, Burleigh, Grand Forks, and Ward: how the four biggest counties compare

Cass County, home to Fargo, the state’s largest city, carries the highest home values of the four alongside a moderate combined mill rate. Burleigh County, home to the state capital of Bismarck, runs the lowest combined rate among the four. Grand Forks County runs the highest combined rate of the four, and posts one of the highest dollar tax bills in the state even though its typical home value runs below Fargo and Bismarck. Ward County, centered on Minot and close to the Bakken oil patch in the state’s northwest, runs a moderately high rate as well. Switching counties above resets both price and mill rate defaults to match.

The credit that tripled: $500 to $1,600, funded by oil money

North Dakota’s Primary Residence Credit started in 2023 under House Bill 1158, capped at $500. During the 2025 legislative session, House Bill 1176 raised it to $1,600, effective for the 2026 tax year, funded directly from the state’s Legacy Fund, the sovereign wealth fund built from oil and gas extraction tax revenue. Unlike most relief programs in this calculator series, there’s no age or income requirement at all; any owner-occupant applies directly online with the state, not the county, during an annual window that runs January 1 through April 1. The state estimates roughly 50,000 North Dakota households will see their general property tax bill drop to zero this year because of the increase.

“Zero tax” doesn’t always mean zero cost: special assessments

Here’s the detail that catches some buyers off guard: the Primary Residence Credit only offsets your general, consolidated property tax, the portion funding county, city, school, and park district budgets. It does not reduce special assessments, the separate charges some properties carry for a specific local improvement like a new street, water main, or sewer line, often tied to a newer subdivision. A homeowner could genuinely see a $2,000 general tax bill drop to a few hundred dollars from the credit, while still owing several thousand dollars in special assessments on the same property tax statement. If you’re buying in a newer development, ask specifically about outstanding special assessments; they won’t show up as reduced by any of the credits described here.

The Homestead Credit and Disabled Veteran Credit, and North Dakota’s new 3% levy cap

Separate from the Primary Residence Credit, the Homestead Property Tax Credit is available to owners 65 or older, or permanently and totally disabled, with household income at or under $70,000. Unlike the Primary Residence Credit’s flat dollar amount, this one reduces taxable value directly: a full 100% reduction, up to $9,000 of taxable value, for income at or under $40,000, and a 50% reduction, up to $4,500, for income between $40,001 and $70,000. Out-of-pocket medical expenses can be deducted when calculating household income for this program. A separate Disabled Veteran’s Credit is available for veterans with a service-connected disability rating of 50% or higher, also reducing taxable value by an amount tied to the disability percentage. The same 2025 legislation that expanded the Primary Residence Credit also capped most local government levy growth at 3% a year, though new construction and newly annexed land are exempt from that cap, which is worth knowing if you’re comparing an established neighborhood to a rapidly growing subdivision.

Common Mistakes North Dakota Buyers Make With the Numbers

• Applying the mill rate directly to full market value. North Dakota’s combined 4.5% ratio means the real bill is a small fraction of what that naive math suggests.
• Forgetting to apply for the Primary Residence Credit every year. It’s not automatic and must be filed online between January 1 and April 1.
• Assuming a near-zero general tax bill means near-zero total property cost. Special assessments on newer construction bill separately and aren’t reduced by the credit.
• Stacking the Homestead Credit incorrectly. It reduces taxable value before the mill rate applies; the Primary Residence Credit then reduces the resulting bill directly, and both can apply together for qualifying seniors.
• Comparing a mature Bismarck neighborhood to a new Fargo subdivision by tax bill alone. New construction and annexed land are exempt from the state’s 3% levy growth cap, which can affect how fast rates in growing areas move over time.

Tips for Lowering Your North Dakota Mortgage Payment

1. Apply for the Primary Residence Credit online every year between January 1 and April 1; it’s the single largest, most universal benefit covered in this calculator.
2. If a borrower on title is 65 or older or permanently disabled and income-qualifies, apply for the Homestead Property Tax Credit as well; the two stack together.
3. If a veteran on title has a 50% or higher disability rating, apply for the Disabled Veteran’s Credit by the February 1 deadline.
4. Ask specifically about outstanding special assessments before buying in a newer subdivision; they aren’t reduced by any property tax credit.
5. Use the extra-payment scenario above; even a modest additional principal payment compounds meaningfully over a 30-year North Dakota loan.

Frequently Asked Questions

References

• North Dakota Office of State Tax Commissioner, Primary Residence Credit, Homestead Credit, and Disabled Veteran’s Credit guidance – tax.nd.gov/prc
• Cass, Burleigh, Grand Forks, and Ward County Director of Tax Equalization offices, current combined mill rates – county government sites
• 2025 North Dakota House Bill 1176; 2023 North Dakota House Bill 1158
• Freddie Mac Primary Mortgage Market Survey, weekly national rate averages – freddiemac.com/pmms

Related DexoCalc Tools

This North Dakota mortgage calculator is part of the Mortgage Calculators cluster I am building out on DexoCalc. Start with the national Mortgage Calculator to compare North Dakota against any other state, use the Mortgage Affordability Calculator to work out your target price range from income and debts first, or compare a very different recent tax-relief overhaul in the Montana Mortgage Calculator. Browse every state-specific tool as new ones publish on the full Mortgage Calculators hub.

This calculator provides estimates for educational purposes only and is not a loan offer, pre-approval, or substitute for advice from a licensed North Dakota mortgage professional or tax advisor. Property tax, credit, and mill rate figures are approximations that vary by county and individual circumstances; confirm exact figures with your county director of tax equalization. Sources: North Dakota Office of State Tax Commissioner, county tax equalization offices, Freddie Mac.