The Missouri capital gains tax elimination is narrower than the headlines suggest: starting with the 2026 tax year, Missouri removes state income tax only on capital gains from selling physical gold and silver that meet the statutory definition of “specie.” Every other capital gain, from stock sales to real estate profits to business interests, still gets taxed as ordinary income at the state’s top rate of 4.7 percent. And federal capital gains tax on gold and silver stays fully in effect, so these transactions are not tax-free.
What Missouri Actually Eliminated
Amended Section 143.121 lets you subtract from your Missouri adjusted gross income any capital gain from the sale or exchange of specie that was included in your federal AGI.1Missouri Revisor of Statutes. Revised Statutes of Missouri, RSMo Section 143.121 The subtraction applies to all tax years beginning on or after January 1, 2026.
“Specie” is defined as bullion fabricated into products of uniform shape, size, design, content, weight, and purity that are suitable for or customarily used as currency or a medium of exchange. “Specie legal tender” includes any specie coin issued by the federal government, along with any other qualifying specie.2Missouri Revisor of Statutes. Revised Statutes of Missouri, RSMo Section 408.010 In practice that covers American Gold Eagles, Silver Eagles, and gold and silver bars of standard purity.
What it doesn’t cover matters just as much. Numismatic coins valued primarily for their rarity, jewelry, and precious-metals ETFs you never physically possess fall outside the definition. If your “gold investment” is a share in a fund, this exemption does not apply to you.
How to Claim the Subtraction on Your Missouri Return
Missouri’s return starts with your federal adjusted gross income, which already includes any gain from selling gold or silver.3Missouri Department of Revenue. Individual Income Tax FAQs You then subtract the specie-related gain as a Missouri modification. The Department of Revenue’s 2025 instructions already reference a “capital gain exclusion” and a “capital gain subtraction” among the available modifications; specific line-item guidance for the gold and silver subtraction will appear in the 2026 filing instructions once they are published.
Documentation does the work of defending the subtraction. Keep purchase receipts showing cost basis, sale confirmations with dates and amounts, and anything that establishes the asset meets the statutory definition of specie. If you bought bars from a dealer five years ago and sell them in 2026 at a profit, you report the full gain federally and then back it out of your Missouri taxable income. The Department of Revenue can ask you to prove both the gain amount and that the asset qualifies.
Federal Tax on Gold and Silver Still Applies
Missouri’s exemption removes only the state layer. The IRS classifies physical gold, silver, and other precious metals as “collectibles” under IRC Section 408(m), and gains on collectibles held longer than one year are taxed at a maximum federal rate of 28 percent, rather than the 15 or 20 percent that applies to long-term stock gains.4Office of the Law Revision Counsel. 26 USC 1 – Tax Imposed If you held the metal a year or less, the gain is taxed as ordinary income at your federal marginal rate, which can run higher than 28 percent.
The collectibles category under federal law sweeps broadly, covering any metal or gem, any coin, and any stamp, among other things.5Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts A Missouri resident who sells $50,000 of gold bullion at a $20,000 profit would owe zero to Missouri but could owe up to $5,600 to the IRS on the same transaction. Treating the sale as tax-free because the state piece is gone is where people get caught.
Dealers also have federal reporting duties that can draw attention to your sale. A Form 1099-B is required for certain bullion sales, such as gold bars totaling one kilogram or more at .995 purity, or silver bars totaling 1,000 troy ounces or more at .999 purity. Any cash payment of $10,000 or more in a single transaction triggers a Form 8300 filing. Even when no dealer form is filed, you are still required to report the gain on your federal return.
Every Other Capital Gain Is Still Taxed in Missouri
Outside the specie exemption, Missouri taxes all capital gains as ordinary income. The state has no separate capital gains rate. Your return starts with federal AGI, which already includes gains from selling stocks, bonds, real estate, or business interests, and those gains flow through Missouri’s brackets just like wages.3Missouri Department of Revenue. Individual Income Tax FAQs
Missouri also makes no distinction between short-term and long-term gains. The federal return may tax your long-term stock gains at a preferential 15 or 20 percent rate, but Missouri just sees the number on your federal AGI and applies its own brackets. For tax year 2026, the top bracket starts at $9,191 of Missouri taxable income at a rate of 4.7 percent.6Missouri Department of Revenue. 2025 Individual Income Tax Year Changes That threshold is low enough that any meaningful capital gain lands in the top bracket, so the effective Missouri rate on most capital gains is 4.7 percent.
Because Missouri follows federal AGI, accuracy on your federal return matters on both sides. If the IRS later adjusts a gain you underreported, Missouri will follow. If you have federal capital losses that reduce your AGI, those losses reduce what Missouri can tax too.
Selling Your Home
Selling a primary residence is the one capital gains event where most Missouri residents owe nothing to either the state or the IRS. The federal exclusion under IRC Section 121 removes qualifying home-sale gain before it reaches Missouri’s calculation.7Office of the Law Revision Counsel. 26 U.S. Code 121 – Exclusion of Gain From Sale of Principal Residence Single filers can exclude up to $250,000 of gain; married couples filing jointly can exclude up to $500,000.
To qualify, you must have owned and used the home as your principal residence for at least two of the five years before the sale. Both spouses must meet the use requirement for the full joint exclusion, though only one needs to meet the ownership requirement.7Office of the Law Revision Counsel. 26 U.S. Code 121 – Exclusion of Gain From Sale of Principal Residence The exclusion does not reach vacation homes or rental properties. If your profit exceeds the exclusion, only the excess is taxable, and Missouri taxes that excess at its ordinary rates.
Because the exclusion happens at the federal level, Missouri does not require a separate state form. If you properly exclude the gain federally, your Missouri AGI already reflects the lower number. Keep records of your purchase price, improvement costs, and dates of occupancy in case either agency asks later.
Watch the Estimated Tax Trap on a Big Sale
A large realized gain in a single year can create an estimated-tax problem that catches wage earners off guard. Missouri requires quarterly estimated payments if you expect to owe $100 or more in state tax after withholding and credits.8Missouri Department of Revenue. MO-1040ES 2025 Declaration of Estimated Tax for Individuals Almost any mid-year sale of appreciated stock or investment property clears that bar.
Due dates follow the federal pattern: April 15, June 15, September 15, and January 15 of the following year. Sell an asset in May that generates $3,000 in Missouri tax, wait until the next April to pay, and interest accrues on the underpayment. You can avoid the penalty by making estimated payments equal to at least 100 percent of the prior year’s tax liability or 90 percent of the current year’s, whichever is smaller.8Missouri Department of Revenue. MO-1040ES 2025 Declaration of Estimated Tax for Individuals One big sale in an otherwise withholding-only year is the classic trigger.