Section 1256 60/40 Tax Calculator

A section 1256 60/40 calculator estimates the federal tax on your futures and broad based index option profits by splitting every gain into a 60 percent long term slice and a 40 percent short term slice, no matter how long you held the position. Section 1256 contracts follow a special rule in the United States tax code that many active futures and options traders find friendlier than the rules for ordinary stock trading. This page explains what those contracts are, how the 60/40 split works, how year end mark to market changes what you owe, and how to read each input and output in the calculator above. It is written for the 2025 and 2026 tax years and is meant to help you plan, not to file for you.

What Are Section 1256 Contracts

Section 1256 of the Internal Revenue Code covers a specific group of exchange traded instruments that receive their own tax treatment. If a product falls inside this group, its gains and losses are handled under the 60/40 rule and marked to market at year end, whether or not you sold. The category is narrower than most beginners expect, so it is worth knowing exactly what qualifies before you rely on the calculator above.

• Regulated futures contracts traded on a qualified exchange, such as E mini S&P 500, crude oil, gold, and Treasury futures.
• Broad based stock index options, including options on SPX, NDX, RUT, XSP, and VIX. These track a wide index rather than a single company.
• Non equity options, meaning listed options on commodities, currencies, and broad indexes rather than on individual stocks or narrow baskets.
• Foreign currency contracts that meet the code definition, often certain forward and futures style currency positions.
• Dealer equity options and dealer securities futures contracts held by professional dealers.

The 60/40 Rule Explained

The heart of section 1256 is the 60/40 rule. When you add up your net gain or loss on qualifying contracts for the year, the tax code automatically treats 60 percent of that amount as a long term capital gain and 40 percent as a short term capital gain. This split ignores your holding period entirely. A futures position you opened and closed in ninety seconds still gets 60 percent of its profit taxed at the lower long term rate. That is very different from stocks, where you must hold for more than one year to reach long term treatment.

The long term slice is taxed at long term capital gains rates, which for 2025 and 2026 are 0 percent, 15 percent, or 20 percent depending on your taxable income. The short term slice is taxed at your ordinary marginal rate, which ranges from 10 percent up to 37 percent. Because most of the gain rides on the lower long term rate, the combined or blended rate usually sits well below your top ordinary rate. High income traders may also owe the 3.8 percent Net Investment Income Tax on top, which the simple calculator above does not add, so treat its output as a base estimate.

Mark To Market At Year End

Section 1256 contracts are marked to market on the last business day of the tax year. In plain terms, the IRS pretends you sold every open position at its fair market value on that day, then pretends you bought it back at the same price. Any unrealized gain or loss on open contracts is pulled into the current year, and the position starts the new year with an adjusted basis. This means you can owe tax on paper profits you have not cashed out, and you can also claim losses on open losing positions without closing them. Your broker reports the combined realized and mark to market figure to you, usually on a Form 1099 B labeled for section 1256 contracts.

How To Use The Calculator Above

The calculator above turns one net figure into a full 60/40 breakdown. Enter three numbers and it returns five results. Here is what each field means and where to find the value.

1. Net 1256 Gain: your total realized plus mark to market gain on section 1256 contracts for the year. This is the aggregate profit figure your broker reports on the 1256 section of Form 1099 B. If you had a net loss, the 60/40 split still applies but the tax result is a benefit, not a bill.
2. Your Marginal Rate: the ordinary income tax rate that applies to your next dollar of income, from 10 percent to 37 percent. This rate is applied to the 40 percent short term portion.
3. Long Term Rate: the long term capital gains rate that applies to you, usually 0, 15, or 20 percent. This rate is applied to the 60 percent long term portion.
4. Output, 60 Percent Long Term Portion: the dollar amount taxed at your long term rate, equal to 0.60 times your net gain.
5. Output, 40 Percent Short Term Portion: the dollar amount taxed at your ordinary rate, equal to 0.40 times your net gain.
6. Output, Blended Tax: the total estimated federal income tax, being the long term portion times the long term rate plus the short term portion times your marginal rate.
7. Output, Blended Rate: the blended tax divided by the net gain, shown as a single percentage so you can compare it against a plain ordinary rate.
8. Output, Net After Tax: your net gain minus the blended tax, an estimate of what you keep before state tax and any Net Investment Income Tax.

Worked Examples With Real Numbers

Example 1: Mid Bracket Trader, 24 Percent Marginal Rate

Suppose your net 1256 gain for the year is 50,000 dollars, your marginal rate is 24 percent, and your long term rate is 15 percent. The 60 percent long term portion is 30,000 dollars, taxed at 15 percent for 4,500 dollars. The 40 percent short term portion is 20,000 dollars, taxed at 24 percent for 4,800 dollars. Blended tax is 9,300 dollars. Blended rate is 9,300 divided by 50,000, which is 18.6 percent. Net after tax is 40,700 dollars. An equity day trader with the same 50,000 dollar short term profit at 24 percent would owe 12,000 dollars, so the 60/40 rule saved 2,700 dollars here.

Example 2: Top Bracket Trader, 37 Percent Marginal Rate

Now suppose your net 1256 gain is 100,000 dollars, your marginal rate is 37 percent, and your long term rate is 20 percent. The 60 percent long term portion is 60,000 dollars, taxed at 20 percent for 12,000 dollars. The 40 percent short term portion is 40,000 dollars, taxed at 37 percent for 14,800 dollars. Blended tax is 26,800 dollars, a blended rate of 26.8 percent, and net after tax is 73,200 dollars. A stock day trader with 100,000 dollars of pure short term gains at 37 percent would owe 37,000 dollars. The section 1256 treatment saved 10,200 dollars in this case, which is the classic reason active futures traders study these rules.

Example 3: Smaller Account, 22 Percent Marginal Rate

Suppose your net 1256 gain is 20,000 dollars, your marginal rate is 22 percent, and your long term rate is 15 percent. The 60 percent long term portion is 12,000 dollars, taxed at 15 percent for 1,800 dollars. The 40 percent short term portion is 8,000 dollars, taxed at 22 percent for 1,760 dollars. Blended tax is 3,560 dollars, a blended rate of 17.8 percent, and net after tax is 16,440 dollars. Even at a modest income level the blended rate lands below the ordinary 22 percent rate, because most of the gain still gets long term treatment.

Reference Table: Blended Rate By Bracket

The table below shows the approximate 60/40 blended rate at several common ordinary brackets, using a typical long term rate for each. Your own long term rate can differ, so treat these as illustrations. Figures reflect 2025 and 2026 federal rates and exclude state tax and the 3.8 percent Net Investment Income Tax.

Why Futures Traders Often Pay A Lower Blended Rate

An equity day trader who buys and sells stocks within the same day holds everything short term, so all of that profit is taxed at ordinary rates up to 37 percent. A futures trader doing the same rapid in and out trading in section 1256 contracts gets 60 percent of every gain taxed at long term rates instead. As the table shows, that pushes a top bracket trader from 37 percent down toward 26.8 percent on the same size of profit. The benefit grows as your ordinary bracket rises, since the 60 percent long term slice is where the discount lives. This is a structural feature of the tax code, not a loophole, and it is one reason some active traders prefer index futures and broad based index options over single stock trading.

Form 6781 And Reporting

You report section 1256 gains and losses on IRS Form 6781, titled Gains and Losses From Section 1256 Contracts and Straddles. Your broker sends the aggregate profit or loss, including the year end mark to market adjustment, and you enter it on Form 6781. The form mechanically applies the 60/40 split and carries the two portions to Schedule D. Form 6781 is also where you make the loss carryback election if you choose to. Keep your year end 1099 B and your own trade records so the reported figure can be checked. Clean records make this step far less stressful and reduce the chance of an error the IRS later questions.

Tips And Common Mistakes

• Do not assume every option is a 1256 contract. Single stock options and narrow based index options are usually taxed the ordinary way, not 60/40.
• Do not forget mark to market. Open winning positions at year end can create a tax bill even though you never sold.
• Do not double count. The 1099 B figure for section 1256 contracts already blends realized and mark to market results, so do not add your own trade by trade total on top.
• Do not ignore the 3.8 percent Net Investment Income Tax if your income is above the threshold. The simple calculator above does not include it.
• Do not skip state tax. Many states tax capital gains as ordinary income, which can erase part of the federal 60/40 benefit.
• Do not rely on a memory of last year's rates. Brackets and long term thresholds are adjusted for inflation, so confirm the current year figures.

Section 1256 treatment can meaningfully lower the tax on active futures and broad based index option trading, but only if your records are clean and your figures are right. The single hardest part at tax time is reconstructing what you actually traded, at what price, and when. Keeping a disciplined trade log on OneTradeJournal as you go means your year end numbers already line up with your broker's 1099 B, your Form 6781 entry is a quick check rather than a scramble, and any question from a professional or the IRS is easy to answer. Discipline in your journal today makes an honest, accurate tax return far simpler tomorrow. Use the calculator above to plan, keep your log tidy, and let a qualified tax professional confirm the final numbers.