Maine Capital Gains Tax Calculator

Maine taxes a capital gain as ordinary income across three statutory bands for a single filer, 5.8% below $27,400, 6.75% to $64,850 and 7.15% above, and then adds a 2% surcharge on taxable income above $1,000,000 that is new for tax years beginning in 2026. The engine encodes that surcharge as a fourth band at 9.15%, the same way it encodes the Massachusetts surtax.

On the default inputs, a $100,000 gain stacked on $75,000 of other income, the calculator returns $7,150.00. The $75,000 salary has already filled every band below 7.15%, so the entire gain is taxed at the top ordinary rate and the effective rate on the gain equals the marginal rate exactly.

Strip the other income out and the graduation appears: the same $100,000 gain alone returns $6,630.30, an effective rate of 6.63% against a 7.15% marginal rate. The difference, $519.70, is the entire value of Maine's two lower bands to a single filer.

Two limits on the figure. This page always walks the single-filer schedule; Maine's joint schedule doubles the lower bounds to $54,850 and $129,750 and starts the surcharge band at $1,500,000, and the engine holds that array, but the configuration passes no filing status so the single array is used. And Maine's bounds are indexed annually under 36 M.R.S. 5403, so these thresholds are specific to 2026 and will move.

Maine taxes a capital gain as ordinary income across three bands, 5.8%, 6.75%, and 7.15%, with the top rate starting at $64,850 for a single filer. A 2% surcharge applies above $1,000,000 of taxable income for tax years beginning in 2026, lifting the top marginal rate to 9.15%. Maine grants no capital gains exclusion, so the whole gain runs the schedule.

The gain is stacked on top of your other income and walked through the bands from there.

Step by step, with your numbers:

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. 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.
4. Effective rate. Total Maine 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.
5. Net proceeds. Subtract the state tax from the gain to get what you keep before federal tax.

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

1. Stack the income. Maine taxes capital gains as ordinary income. Since income fills the lower brackets first, the $75,000 of baseline income already occupies the lower tiers, so the $100,000 gain stacks on top and pushes into higher brackets.
2. Apply the marginal brackets. Working through Maine's bracket schedule, each slice of the gain is taxed at its own bracket's rate, with the highest slice reaching the 7.15% top marginal bracket.
3. Total state tax due. Summing the tax owed across every bracket the gain touches produces a total Maine state tax liability of $7,150.00.
4. Effective rate. Because the $75,000 of other income already fills the brackets below Maine's top rate, the entire gain lands in the 7.15% bracket, so the effective rate on the gain equals the marginal rate: 7.15%.
5. Net proceeds. After paying $7,150.00 in state tax, the investor keeps $92,850.00 of the $100,000 gain, before any federal tax applies.

Maine's surcharge band is the one boundary in this schedule that a large disposal will actually cross, and it applies to total taxable income, gain plus other income, not to the gain alone. With the default $75,000 of other income in place, the line falls at $925,000 of gain.

At $924,900 of gain. Total taxable income is $999,900, entirely under the line, and the calculator returns $66,130.35. Marginal rate: 7.15%.

At $925,100, two hundred dollars later. Total taxable income is $1,000,100, and $100 of it sits above the surcharge threshold. The calculator returns $66,146.65. Marginal rate: 9.15%.

The $200 step costs $16.30, which is $7.15 on the slice below the line plus $9.15 on the slice above it. At exactly $925,000 of gain the tax is $66,137.50 and the surcharge has not yet engaged. This is a marginal step, not a cliff: crossing the line does not re-rate the first million, it re-rates only the excess, and the cost of the crossing itself is two cents on the hundred dollars.

What that means for splitting a disposal. A $1,000,000 gain on the same $75,000 salary returns $73,000.00, an effective rate of 7.30% because $75,000 of the gain was surcharged. Realizing $925,000 in one year and the remaining $75,000 in a year with no other income would move that last slice out of the 9.15% band, and it is the only structural reason a Maine taxpayer has to split a disposal.

Marginal cost of the next unit, below the line. Each additional $1,000 of gain costs $71.50 while total income stays under $1,000,000. Moving the default entry from $100,000 to $101,000 lifts the tax from $7,150.00 to $7,221.50. Above the line the same $1,000 costs $91.50.

Reading the twelve-row table. With $75,000 of other income the sweep runs from $16,666.67 to $200,000.00 of gain and produces $1,191.67 to $14,300.00 of tax, a straight line at 7.15% throughout, with $7,150.00 at the midpoint. The default sweep never reaches the surcharge and never re-enters the lower bands, so the visible line is the 7.15% band alone. A $400,000 gain returns $28,600.00, still exactly 7.15%.

Where the table stops being a straight line. Set other income to zero and rows one and two fall inside the 5.8% and 6.75% bands, so the early rows bend upward before settling at 7.15%. Push the gain past roughly $925,000 with the default salary and the line steepens. Between those two points, which covers almost every realistic disposal, the Maine answer is one rate applied to everything.

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.

• Maine Revenue Services: 2026 Statutory Individual Income Tax Rate Schedules. maine.gov/revenue
• Internal Revenue Service (IRS): Publication 544 (Sales and Other Dispositions of Assets) and Publication 550 (Investment Income and Expenses). irs.gov/publications/p544