Estimates only — this is not tax advice. Consult a CPA or enrolled agent before acting on these figures. The calculator does not model the alternative minimum tax, wash sales, like-kind exchanges, QSBS, installment sales, or state additions and subtractions. See what is out of scope.
Show your work — 0 steps, each with its rule and citation
How New Jersey taxes a capital gain
Statutory authority: N.J. Rev. Stat. § 54A:2-1
Graduated rates to 10.75%, with no preferential treatment
New Jersey taxes capital gains as ordinary income across a graduated ladder that runs from 1.4% to 10.75%, the top rate applying above $1,000,000. There is no reduced rate for long-term gains.
Combined with federal tax and the net investment income tax, New Jersey sits among the most expensive places in the country to realise a very large gain — and unlike New York, the top rate arrives at $1,000,000 rather than $25,000,000, so it is reachable by a single good exit rather than only by the very wealthy.
The single and joint ladders have different numbers of brackets
This is a genuine structural quirk rather than a rounding difference. The joint and head-of-household schedule has eight brackets; the single and married-filing-separately schedule has seven. The single ladder skips the 2.45% step entirely, going from 1.75% straight to 3.5%.
Any tool that models New Jersey with one shared rate array and merely swaps the thresholds per filing status will get single filers wrong. This calculator stores each filing status's complete ladder separately for exactly that reason.
The thresholds are fixed in statute and never move
New Jersey's bracket thresholds are fixed statutory amounts, in force for taxable years beginning on or after 1 January 2020, and are not adjusted for inflation.
That is unusual and it works against taxpayers over time: as incomes rise with inflation, an unchanged ladder pulls more of each year's income into higher bands. It does have one practical upside — a New Jersey figure computed today is not waiting on a year-end publication, so unlike California or Ohio, this page is not carrying a prior-year approximation.
New Jersey does not give you a federal-style loss carryforward
New Jersey does not permit the federal-style capital loss carryforward against other income. Losses can offset gains within the year, but a net loss does not generate the $3,000 deduction against ordinary income that federal law allows, and does not carry forward indefinitely to shelter future gains.
For anyone realising gains and losses across several years, that asymmetry is worth modelling explicitly: the federal and New Jersey answers to "what did this portfolio cost me in tax" can diverge substantially over time even though each individual year looks similar.
Two stacking calculations happening at once
New Jersey is a good state in which to see why a single "capital gains rate" is a fiction. A large gain for a New Jersey resident is stacked twice, independently: once against the federal 0/15/20% ceilings, and once against the state's own eight-step ladder. The two sets of thresholds sit at completely different income levels, so the same sale can straddle a federal boundary and a state boundary at different points along the gain.
That has a practical consequence for anyone considering splitting a disposal across two tax years. The split that optimises the federal position is not necessarily the split that optimises the New Jersey position, and the state ladder — with its top rate arriving at $1,000,000 rather than the federal $25,000,000 equivalent in neighbouring New York — often binds first. Work the combined figure rather than either one alone; the calculator above shows both layers separately for exactly this reason.
A worked New Jersey example
Every figure below is computed by the same engine that powers the calculator above, at the moment this page was built — not typed in by hand. When the tax-year data is updated, this example updates with it.
Selling a second home for a $400,000 gain
A married New Jersey couple filing jointly, with $432,200 of gross income, sells an investment property for a $400,000 long-term gain. No Section 121 exclusion applies because it was never their main home.
- Taxable income after deduction
- $800,000
- Taxable gain
- $400,000
- Tax owed without the sale
- $81,196
- Tax the sale added
- $84,515
- of which net investment income tax
- $15,200
- Total federal tax
- $165,711
- New Jersey state tax
- $33,280
- Effective rate on the gain
- 21.13%
This gain straddles New Jersey's 6.37% and 8.97% bands as it stacks on top of an already-high income, while federally it straddles the 15% and 20% ceilings — two separate stacking calculations happening at once.
Caveats on this example (2)
- Net investment income was derived from capital gains and qualified dividends only. Interest, non-qualified dividends, rents, royalties and passive business income inside ordinaryIncome are also net investment income under IRC 1411(c) and are not counted here.
- New Jersey: the state taxable income base is approximated by federal ordinary taxable income. State additions, subtractions and deductions are not modelled.
Show the working — 15 steps, each with its citation
- Net short-term capital gain or loss for the year$0
Assets held one year or less. Taxed at ordinary rates if a net gain.
- Net long-term capital gain or loss for the year$400,000
Assets held more than one year. Eligible for the 0/15/20% rates.
- Standard deduction-$32,200
Adjusted gross income of $832,200 less $32,200.
- Taxable income$800,000
The figure the rate tables and the capital gain ceilings are both measured against.
- Ordinary income taxed at 10%$2,480
$24,800 of taxable income between $0 and $24,800.
- Ordinary income taxed at 12%$9,120
$76,000 of taxable income between $24,800 and $100,800.
- Ordinary income taxed at 22%$24,332
$110,600 of taxable income between $100,800 and $211,400.
- Ordinary income taxed at 24%$45,264
$188,600 of taxable income between $211,400 and $400,000.
- Ordinary income stacked below the long-term gain$400,000
Long-term gain is taxed by reference to where it sits ON TOP of $400,000 of other taxable income, not from the bottom of the rate table.
- Long-term gain taxed at 15%$32,055
Gain between the $98,900 zero-rate ceiling and the $613,700 15% ceiling.
- Long-term gain taxed at 20%$37,260
Gain above the $613,700 maximum 15% rate amount.
- Net investment income tax threshold$250,000
Modified AGI of $832,200 against the $250,000 threshold for married filing jointly. This threshold is statutory and is not adjusted for inflation.
- Net investment income tax at 3.8%$15,200
3.8% of $400,000, the lesser of net investment income ($400,000) and the amount by which modified AGI exceeds the threshold ($582,200). Here the binding figure is net investment income.
- New Jersey income tax on the gain$33,280
$400,000 stacked on $400,000 of other taxable income across a 8-bracket ladder topping out at 10.75%. Federal ordinary taxable income is used as the base; the state's own taxable income differs, so treat this as an approximation.
- Total tax$198,991
$198,991 on $832,200 of total income, an effective rate of 23.91%.
What this calculator does not cover for New Jersey
The New Jersey figure stacks your gain on your federal ordinary taxable income. New Jersey computes its own taxable income with its own additions and subtractions, which are not modelled here — so treat the state number as a close approximation for a straightforward wage-and-sale situation, and as a rough one if your return carries significant state adjustments.
Full-year residency is assumed throughout. Part-year residents, non-residents, and gains sourced to property in another state all turn on rules this calculator does not model. The complete list of what is in and out of scope is on the methodology page.
Other states
- New YorkOrdinary income, nine brackets to 10.9%. NYC and Yonkers add their own.
- PennsylvaniaFlat 3.07%, no holding-period distinction, and unusual loss rules.
- IllinoisFlat 4.95% on everything. No preferential rate, no exclusion.
See the full 2026 capital gains guide for the federal rules that apply wherever you live — the rate ladder, the net investment income tax, the home-sale exclusion and depreciation recapture — plus every state we currently cover.