North Dakota Capital Gains Tax Calculator

North Dakota excludes 40% of net long-term capital gain from state taxable income under N.D.C.C. § 57-38-30.3, so 60% of the gain runs through a graduated schedule whose rates are 0.00%, 1.95%, and a top rate of 2.50%. Combined, that produces one of the lowest state capital gains burdens in the country outside the states with no income tax at all.

The exclusion is a long-term provision. Gain on assets held one year or less is taxed as ordinary income at the full graduated rates with no exclusion.

Capital gains get evaluated alongside other taxable earnings across North Dakota's progressive tax brackets. When gains are recognized on top of baseline salary or business income, they're taxed at the taxpayer's top marginal bracket rate, reaching up to 2.50%.

Understanding state-level capital gains taxation is essential for high-net-worth individuals, portfolio managers, corporate executives, and real estate investors. State income taxes significantly affect net internal rates of return (IRR) on capital dispositions, 1031 exchange planning, installment sale structuring, and equity compensation exercises (ISOs, NSOs, and RSUs).

In institutional wealth management and private equity underwriting, capital gains calculations must account for both statutory tax rates and multi-jurisdictional residency rules. Whether disposing of publicly traded securities, privately held business interests, real property, or digital assets, evaluating state-level tax exposure is a critical component of pre-liquidity tax modeling and post-sale wealth preservation.

Proper capital asset planning in North Dakota requires tracking taxable events across federal and state reporting cycles. Because timing and holding structure dictate net after-tax proceeds, investors must rigorously analyze the interaction between federal adjusted gross income (AGI) baselines and state modifications before closing substantial transactions.

North Dakota excludes 40% of net long-term capital gain, leaving 60% to be taxed, and it does so against an unusually mild schedule: nothing on the first $49,575 of taxable income, 1.95% up to $250,400, and 2.5% above that. The exclusion and the low rates compound, which is why the state tax on a long-term gain here lands near 1% of the gain rather than the 5% or more common elsewhere. Short-term gain gets no exclusion.

The exclusion comes off before the remaining 60% is stacked on other income.

The sequence:

1. Start with the net gain. Capital losses and loss carryforwards are netted against the gain before anything else happens.
2. Stack the gain on your other income. Ordinary income fills the lower brackets first and the gain sits on top of it, so the gain is taxed at whatever rates are still open above your salary. The same gain costs a high earner more than it costs a low earner. Enter other income as a taxable-income figure: the calculator does not subtract a standard deduction or personal exemption for you.
3. Take the 40% exclusion (N.D.C.C. § 57-38-30.3). Subtract 40% of the net long-term gain before the remainder is stacked or bracketed, leaving 60% in the base.
4. Walk the brackets. The slice of the gain that falls in each band is multiplied by that band's rate, and the pieces are added together.
5. Effective rate. Total North Dakota tax divided by the whole realized gain. On a graduated schedule this sits below the top marginal rate, because the lower slices were taxed at lower rates.
6. Net proceeds. Subtract the state tax from the gain to get what you keep before federal tax.

Consider an investor in North Dakota who realizes $100,000 in capital gains on top of $75,000 in baseline ordinary income for the year.

1. Apply the 40% exclusion first. N.D.C.C. § 57-38-30.3 removes 40% of the $100,000 net long-term gain, or $40,000, from North Dakota taxable income. $60,000 of gain remains.
2. Stack the income. The $75,000 of baseline ordinary income fills the lower brackets first, so the remaining $60,000 of gain stacks on top of it.
3. Apply the marginal brackets. The $75,000 of other income is already past the $49,575 start of the 1.95% bracket, and $135,000 of combined income stays below the $250,400 start of the 2.50% bracket, so the entire $60,000 of taxable gain is taxed at 1.95%: $1,170.00.
4. Effective rate. Dividing $1,170.00 by the full $100,000 realized gain gives an effective rate of 1.17%, against a 1.95% marginal bracket.
5. Net proceeds. After paying $1,170.00 in state tax, the investor keeps $98,830.00 of the $100,000 gain, before any federal tax applies.

Had the gain been short-term, no exclusion would apply and the full $100,000 would be taxed at 1.95%, producing $1,950.00.

North Dakota is the only page in this family where two separate reliefs stack: 40% of the gain is excluded before anything is bracketed, and the first $49,575 of what remains is taxed at zero. The sweep locates the point where they run out.

At $82,625 of gain with no other income. The engine excludes $33,050 under N.D.C.C. 57-38-30.3, leaving $49,575 of taxable gain, exactly filling the zero band. North Dakota's tax is $0.00.

At $82,725, one hundred dollars later. The exclusion rises to $33,090, taxable gain becomes $49,635, and $60 of it is exposed at 1.95%. The tax is $1.17. That is the cost of the first taxable dollar of capital gain in North Dakota, and it takes an $82,625 gain to reach it.

Where the 2.5% band begins. With the default $75,000 of other income, taxable gain plus other income reaches $250,400 at a realized gain of $292,333, where the tax is $3,420.30 and the marginal rate still reads 1.95%. One hundred dollars later, at $292,433, the tax is $3,421.80 and the marginal rate becomes 2.50%. Crossing costs $1.50 rather than $1.17 per $100 of gain.

The marginal cost of the next unit. At the baseline, raising the gain from $100,000 to $101,000 moves the tax from $1,170.00 to $1,181.70. Each additional $1,000 of long-term gain costs $11.70, because only $600 of it is taxable and only at 1.95%.

The reverse question: what is the exclusion worth? On the $100,000 baseline gain, $40,000 is removed from the base. Had the same gain been short-term, no exclusion would apply and the full $100,000 would meet 1.95%, producing $1,950.00 instead of $1,170.00. The exclusion is therefore worth $780.00 on this sale, and $7.80 on every further $1,000 of gain.

What the engine will not tell you. It cannot see the asset. The 40% exclusion is applied to whatever you enter, so a short-term gain typed into this page is understated by exactly the $780.00 above. North Dakota's table also carries a higher farm-asset exclusion percentage that no calculator input can reach, and no standard deduction is subtracted from the other-income figure before the bracket walk.

While this calculator provides penny-exact state statutory modeling, additional federal and transactional complexities warrant supplementary review: - Federal Capital Gains Taxes: Federal long-term brackets (0%, 15%, 20%) and short-term ordinary rates up to 37% under IRC § 1. - Net Investment Income Tax (NIIT): The 3.8% surtax on net investment income under IRC § 1411 for single filers over $200,000 (married joint over $250,000). - Alternative Minimum Tax (AMT): Federal AMT calculations under IRC § 55 impacting incentive stock option (ISO) exercise spread. - Section 1031 Like-Kind Exchanges: Tax deferral mechanisms for real property held for productive use in trade, business, or investment. - Qualified Small Business Stock (QSBS): Federal Section 1202 gain exclusions where state conformity varies significantly.

• Overpaying by Skipping the 40% Exclusion: North Dakota is not a state that taxes long-term capital gain at full ordinary rates. Failing to claim the N.D.C.C. § 57-38-30.3 exclusion raises the bill by two thirds.
• Failing to Track Holding Periods: The 40% exclusion applies only to net long-term gain. Assets held one year or less get no exclusion at the state level and carry higher federal rates on top of that.
• Underestimating Multi-State Apportionment: Selling real estate or business assets located in other jurisdictions triggers multi-state non-resident return filing obligations.
• Neglecting Underpayment Penalties: Substantial one-time liquidity events require prompt estimated tax payments within the quarter of sale to avoid statutory penalties.
• Mismatched Cost Basis Records: Failure to document reinvested dividends, stock splits, or structural return-of-capital distributions leads to inflated taxable gain calculations.

• North Dakota Office of State Tax Commissioner: 2026 Statutory Individual Income Tax Rate Schedules. tax.nd.gov
• Internal Revenue Service (IRS): Publication 544 (Sales and Other Dispositions of Assets) and Publication 550 (Investment Income and Expenses). irs.gov/publications/p544

Also consulted: N.D.C.C. § 57-38-30.3: 40% exclusion for net long-term capital gain.