Utah Capital Gains Tax Calculator

Utah taxes a capital gain at a flat 4.45%. Utah runs its relief through a taxpayer tax credit that phases out with income rather than through brackets, so the headline rate is what most filers with a substantial gain actually face on that gain.

That makes the state computation a single multiplication, with the effective rate falling straight out of it.

The full sequence:

1. Start with the net gain. Capital losses and loss carryforwards are netted first; what you enter is the net figure.
2. No preferential rate. Utah has no separate capital gains rate and no long-term holding-period break, so the gain is taxed exactly as wages would be.
3. Apply the rate. Multiply the net gain by 4.45%. Because the schedule is flat, your other income does not push the gain into a higher band, and the calculator does not need to stack the two.
4. Effective rate. Total tax divided by realized gain, which on a flat schedule returns 4.45% at every gain size. Effective and marginal rates are the same number here.
5. Net proceeds. Subtract the state tax from the gain to get what you keep before federal tax.

Consider an investor in Utah who realizes $100,000 in capital gains from a single asset sale during the year.

1. Identify the gain. The full $100,000 capital gain is added to gross income, since Utah taxes capital gains at the same statutory rate as wages and other ordinary income, with no separate preferential rate for long-term holdings.
2. Apply the flat rate. Utah's statutory individual income tax rate is a uniform 4.45%, applied to the entire gain regardless of the investor's total income or how long the asset was held.
3. Compute the tax due. $100,000 × 4.45% = $4,450.00, the state tax liability on this sale.
4. Net proceeds. Subtracting the $4,450.00 state tax from the $100,000 gain leaves the investor with $95,550.00 in state after-tax proceeds, before any federal capital gains tax is applied separately.

Because Utah applies one flat rate to every dollar of gain, the effective state tax rate here equals the statutory rate itself: 4.45%.

There is no bracket edge on this page, and there is no exemption cliff or cap either. Utah's schedule is a single band running from the first dollar to infinity at 4.45%, so any threshold described here would be invented. What can be shown instead is that the line really is straight, and what the one live disagreement about the rate is worth in dollars.

The rate is flat from the first dollar, and the sweep proves it

Sweeping the gain from $0 upward in $250,000 steps returns $0.00, $11,125.00, $22,250.00, $33,375.00 and $44,500.00 at $0, $250,000, $500,000, $750,000 and $1,000,000. The increment is $11,125.00 at every step, identical from the first quarter-million to the fourth. The effective rate output reads 4.45% at each of those points and the marginal rate output reads 4.45% alongside it. On a graduated state those two numbers separate, sometimes by more than a point; here they are the same number at every gain size, which is the practical meaning of a flat schedule.

The cost of the next $1,000

Stepping from the $100,000 default in $1,000 increments, the tax reads $4,450.00, $4,494.50, $4,539.00, $4,583.50, $4,628.00. Each additional $1,000 of gain costs $44.50, and unlike a bracketed state that figure never steps up. There is no gain at which it becomes $47.50 or $59.90.

The reverse question

Asked how much can be realised before the rate rises, the answer is that no amount can, because it never rises. The more useful inversion is the one the flat rate makes trivial to answer exactly: a target state bill of $11,125.00 corresponds to a gain of $250,000, and $44,500.00 to a gain of $1,000,000, both taken straight from the sweep above. A seller sizing a reserve can read the schedule in either direction, which is not true on any graduated page in this family.

Right method against wrong method, priced

The live error here is not arithmetic. It is the rate itself. SB 60 of the 2026 General Session cut the individual rate from 4.50% to 4.45% for taxable years beginning on or after 1 January 2026, and the Utah State Tax Commission's own tax-rates page still reads "January 1, 2025 - current: 4.5% or .045". A filer who takes the rate from that page overpays.

Right, at 4.45%: the calculator returns $4,450.00 on the $100,000 default.

Wrong, at the stale 4.50%: feeding the engine a gain of $101,123.60, the gain at which 4.45% produces exactly the figure 4.50% would produce on $100,000, returns $4,500.00.

The error: $50.00 overpaid per $100,000 of gain, or $0.50 per $1,000. It scales linearly because both schedules are flat, so a $2,000,000 sale carries a $1,000.00 overpayment. Small in percentage terms and easy to dismiss, but it is a live disagreement between this table and a state page that has not been updated, and the table is what this calculator uses. The stored 4.45% is kept deliberately: 4.50% is the correct rate for tax year 2025 and the wrong one for 2026.

What the Other Taxable Income field does here, which is nothing

Sweeping other taxable income from $0 to $400,000 in $100,000 steps returns $4,450.00 at every point, with a change of $0.00 between them. This is correct rather than broken, and it is the direct consequence of the flat schedule: there is no lower band for a salary to consume, so nothing is stacked and there is nothing for the gain to be pushed into. The field exists so this page's inputs match the graduated pages in the family, where it moves the answer materially.

The limitation that follows is real and worth stating plainly. Utah delivers most of its relief through a taxpayer tax credit that phases out as income rises, and this calculator models none of it. It multiplies the gain by 4.45% and stops. A filer whose income leaves part of that credit intact will owe less than the $4,450.00 shown, and because the credit's phase-out depends on total income, the inert other-income field is exactly the input that would have driven it. No Utah subtraction, credit, or personal exemption is applied to the figure on this page.

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.

• Assuming Federal Rate Parity: Most states do not offer preferential long-term capital gains rates; gains are taxed at standard ordinary income rates.
• Failing to Track Holding Periods: Short-term gains (assets held ≤1 year) generate higher federal tax liabilities even if state rates treat both holding periods identically.
• 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.

• Utah State Tax Commission, Tax Rates (incometax.utah.gov/paying/tax-rates): still shows "January 1, 2025 - current: 4.5% or .045", which is the tax year 2025 rate. tax.utah.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: SB 60, Utah 2026 General Session, Income Tax Rate Amendments: cut the individual and corporate rate from 4.50% to 4.45% for taxable years beginning on or after 1 January 2026. This calculator uses 4.45%.