The Kansas capital gains tax rate is 5.2% on taxable income up to $23,000 for single filers (or $46,000 for married couples filing jointly), and 5.58% on anything above that. Kansas does not offer a reduced rate for long-term gains the way the federal government does. Whatever you sold — stock, a rental property, a business interest — the gain gets added to your ordinary income and taxed at those bracket rates.
How the Rate Applies to Your Gain
Kansas starts every individual return with your federal adjusted gross income. Your capital gains have already been calculated on federal Schedule D and folded into that number, so by the time Kansas sees the figure, gains and wages look the same. There is no separate treatment, no preferential rate, no long-term versus short-term distinction at the state level.
The current brackets under K.S.A. 79-32,110 work like this:
- Married filing jointly: 5.2% on the first $46,000 of Kansas taxable income, 5.58% on the rest.
- Single, head of household, or married filing separately: 5.2% on the first $23,000, 5.58% on the rest.
Compare that to the federal side, where long-term capital gains (assets held more than one year) are taxed at 0%, 15%, or 20% depending on income. A $100,000 long-term gain might carry a 15% federal rate plus Kansas’s 5.58%, before any surtax enters the picture. Short-term gains from assets held a year or less are taxed as ordinary income federally too, so Kansas doesn’t add a wrinkle there; it just adds another layer.
Before the rates apply, Kansas reduces your taxable income through a standard deduction and personal exemption. For 2025, the standard deduction is $3,605 for single filers and $8,240 for joint filers. The personal exemption, sharply increased by Senate Bill 1 in 2024, is $9,160 per single filer and $18,320 for joint filers. Those reductions cut into your total taxable income, gains included.
Figuring the Gain in the First Place
The gain is the difference between what you sold the asset for and your adjusted basis in it. Basis usually starts with what you paid, plus acquisition costs like broker commissions. It can change:
- Inherited property gets a “stepped-up” basis equal to fair market value on the date of the previous owner’s death. If a parent bought stock for $10,000 and it was worth $200,000 when they died, your basis is $200,000. Sell for $205,000 and the taxable gain is $5,000, not $195,000.1Internal Revenue Service. Gifts and Inheritances
- Gifted property generally carries over the donor’s original basis, so the full appreciation becomes taxable when you sell.
- Permanent home improvements — a new roof, an added bathroom, a finished basement — increase your basis and reduce the eventual gain.
Selling costs, including real estate commissions, title fees, and legal expenses, come off your net proceeds and shrink the gain. Keep receipts and records from the day you buy through the day you sell. Reconstructing basis years later during a Kansas Department of Revenue inquiry is harder than tracking it in real time.
The Home Sale Exclusion
The largest capital gains break most Kansas residents will ever use is the federal exclusion on the sale of a primary home. Under IRC Section 121, you can exclude up to $250,000 of gain if you file single, or $500,000 if you file jointly, as long as you owned and lived in the home as your main residence for at least two of the five years before the sale.2Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence
Because Kansas begins with federal AGI, this exclusion is automatic on your state return. If your gain fits inside the cap, it never enters federal AGI and never reaches Kansas. Gains above the cap are fully taxable at Kansas rates. A surviving spouse can still claim the full $500,000 exclusion if the sale happens within two years of the spouse’s death and the ownership and use tests were met before then.2Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence
Kansas does not offer a separate state-level residence exclusion. The federal rule is the entire benefit.
Strategies to Reduce or Defer the Tax
1031 Exchanges for Real Estate
If you’re selling investment or business real estate, a Section 1031 like-kind exchange lets you defer the entire gain by reinvesting the proceeds into similar real property. Since 2018, this only applies to real property; equipment, vehicles, and other personal property no longer qualify.3Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use in a Trade or Business or for Investment
The clock is strict. You have 45 days from the sale to identify replacement property in writing, and 180 days to close on it. Those windows don’t stretch except in the case of a presidentially declared disaster.4Internal Revenue Service. Like-Kind Exchanges Under IRC Section 1031 Since Kansas follows federal AGI, a completed 1031 defers the gain at both levels.
Qualified Opportunity Fund Investments
Rolling capital gains into a Qualified Opportunity Fund within 180 days of realizing them defers the tax. Hold the QOF investment for at least 10 years and any appreciation inside the fund is never taxed. The deferral on the original gain ends on the earlier of the date you sell your QOF interest or December 31, 2026, so the original gain will be recognized no later than your 2026 tax return. Only gains that would otherwise be recognized before January 1, 2027 are eligible.5Internal Revenue Service. Opportunity Zones Frequently Asked Questions
Installment Sales
Selling on an installment basis under IRC Section 453 spreads gain recognition across the years you actually receive payments. Each payment is treated as part return of basis, part gain, and part interest. Kansas follows this federal treatment, so the gain enters your Kansas AGI only as payments come in. Done right, this can keep you in the 5.2% bracket in each year rather than pushing you into 5.58% all at once.
Donating Appreciated Assets
Donating long-term appreciated stock directly to a qualifying charity avoids the capital gains tax entirely and lets you deduct the full fair market value. Sell first and donate the cash and you owe tax on the gain before you give. The deduction reduces federal AGI before Kansas ever sees your return, so the benefit works at both levels.
Harvesting Losses (Without Tripping the Wash Sale Rule)
Capital losses offset capital gains dollar for dollar. Excess losses can offset up to $3,000 of ordinary income per year ($1,500 if married filing separately), with the remainder carrying forward indefinitely.6Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses
Watch the wash sale rule. If you buy the same or a substantially identical security within 30 days before or after the loss sale, the loss is disallowed for the current year.7Internal Revenue Service. Case Study 1 – Wash Sales The disallowed amount gets added to the basis of the replacement shares, so it isn’t lost forever, but you don’t get the current-year benefit you were harvesting for. Kansas inherits this treatment through AGI conformity.
The 3.8% Federal Surtax Stacks On Top
Higher-income Kansans face a federal Net Investment Income Tax of 3.8% on top of everything else. It applies when modified AGI exceeds $200,000 (single), $250,000 (joint), or $125,000 (married filing separately). The 3.8% hits the lesser of your net investment income or the amount your MAGI exceeds the threshold.8Internal Revenue Service. Topic No. 559 – Net Investment Income Tax
Net investment income includes capital gains, interest, dividends, rental income, and royalties. Stacked with a 20% federal long-term rate and Kansas’s 5.58%, a high-income resident can face a combined effective rate approaching 29% on long-term gains. That is where deferral and exclusion strategies stop being marginal and start earning back their planning costs many times over.
Filing and Estimated Payments
Report gains on Kansas Form K-40. Your starting number is federal AGI, which already includes gains from Schedule D. Apply any Kansas-specific additions or subtractions on Schedule S, then subtract the standard deduction and personal exemption to reach Kansas taxable income.9Kansas Department of Revenue. 2025 Individual Income Tax Booklet
The state deadline matches the federal one, typically April 15, shifting to the next business day when that falls on a weekend or holiday. An approved federal extension automatically extends your Kansas filing deadline; no separate Kansas extension form is needed.10Kansas Department of Revenue. Pub. KS-1515 Tax Calendar of Due Dates The extension gives you more time to file, not more time to pay. Estimate what you owe and pay it by April to avoid interest and penalties. Use Form K-40V as a payment voucher if you’re sending money with an extension.11Kansas Department of Revenue. K-40V Individual Income Tax Payment Voucher
Quarterly Payments After a Big Sale
If a capital gain will leave you owing $500 or more in Kansas tax beyond withholding and credits, you’re expected to make quarterly estimated payments. Due dates track the federal calendar: April 15, June 15, September 15, and January 15 of the following year.12Kansas Department of Revenue. K-210 Underpayment of Individual Estimated Tax
Miss those and Kansas calculates an underpayment penalty on Form K-210 that functions like interest on the shortfall. Federal safe harbor is at least 90% of current-year tax or 100% of last year’s (110% if prior-year AGI topped $150,000).13IRS. 2026 Form 1040-ES – Estimated Tax for Individuals The trap catches people who close a big sale mid-year and wait until April to deal with the tax. Calculate and pay soon after the gain, not at filing time.
Recent Changes and What Might Change
Senate Bill 1, enacted in June 2024 with provisions retroactive to January 1, 2024, is what produced the current two-bracket structure. It replaced a three-bracket system that ranged from 3.1% to 5.7%, eliminated the lowest bracket, and sharply raised the personal exemption.
Senate Bill 269 set up a trigger mechanism that would gradually move Kansas toward a single flat rate, but only when specific revenue thresholds are met. As of December 2025, no reductions had been triggered in the law’s first year, so the 5.2% and 5.58% brackets remain in place for 2026 returns. If a trigger fires later, the math on how capital gains stack with ordinary income will shift.
Because Kansas uses federal AGI as its starting point, changes in federal law flow through automatically. When Congress restricted 1031 exchanges to real property in 2017, Kansas adopted that change without passing anything of its own. Keep an eye on federal tax law; for Kansas capital gains, it’s half the story.