How to Report Forex Income on Your Tax Return

To report forex income on your tax return, you first classify each trade under either Section 988 or Section 1256 of the Internal Revenue Code. Most retail spot forex trades default to Section 988 ordinary income and get reported on Schedule 1 of Form 1040. Regulated forex futures and qualifying interbank forward contracts are Section 1256 contracts, reported on Form 6781 with 60% of the net gain or loss treated as long-term and 40% as short-term. Getting the classification wrong can trigger a 20% accuracy-related penalty, so the first job is figuring out which bucket your trades belong in before you touch a form.

Figure Out Which Section Applies to Your Trades

Section 988 is the default. Unless you take affirmative steps to change it, every forex gain or loss you realize is treated as ordinary income or loss under Section 988.¹ Ordinary treatment means your gains are taxed at your marginal income tax rate, which can reach 37%. On the loss side, Section 988 losses offset your other income dollar-for-dollar without the $3,000 annual cap that applies to net capital losses.²

Section 1256 is narrower. To qualify as a “foreign currency contract” under Section 1256, the contract must require delivery of (or settlement based on) a foreign currency that also trades through regulated futures contracts, it must trade in the interbank market, and it must be priced by reference to interbank rates.³ That definition fits forex futures traded on regulated exchanges like the CME, and certain large forward contracts executed between banks and institutional counterparties. It does not fit the spot forex trades most retail traders place through online brokers. Those retail spot and rolling-spot transactions are over-the-counter contracts that never touch the interbank market, and they default to Section 988.

A practical signal: if your broker’s year-end tax statement does not separately break out Section 1256 contracts, your trades are almost certainly Section 988 transactions. The 60/40 treatment is not something you choose. It applies automatically to contracts that meet the statutory definition, and only to those.

Reporting Section 988 Transactions

Where Section 988 income lands on your return depends on whether you kept the default ordinary treatment or elected capital treatment on individual trades.

Default Ordinary Treatment

Under the default rules, your net forex gain or loss goes on Schedule 1 (Form 1040) as other income. On the 2025 Schedule 1, that is Line 8z, the catch-all for income types not listed elsewhere. Attach a statement to your return identifying the amount as Section 988 foreign currency gain or loss.¹ The amount then flows into your adjusted gross income on Form 1040.

Elected Capital Treatment

Trades you properly elected out of Section 988 go on Form 8949 (Sales and Other Dispositions of Capital Assets), listed individually with date acquired, date sold, proceeds, and cost basis. The totals carry to Schedule D and combine with your other capital gains and losses. You have to track which trades you elected and which stayed under ordinary treatment, because they land on different forms and cannot be netted together.

Reporting Section 1256 Contracts on Form 6781

Forex contracts that qualify as Section 1256 contracts go on Form 6781, Gains and Losses From Section 1256 Contracts and Straddles. The form handles the mark-to-market calculation: every open position is treated as if you sold it at fair market value on the last business day of the tax year, so you combine your realized gains and losses from closed positions with unrealized gains and losses on positions still open at year-end.⁴

You enter the total net figure in Part I of Form 6781. The form itself splits that amount 60/40. The long-term portion flows to Line 11 of Schedule D, and the short-term portion flows to Line 4 of Schedule D.⁵ Schedule D then feeds your net capital gain or loss into Form 1040. The 60/40 split applies regardless of how long you actually held the position.³

Carrying Back Section 1256 Losses

Section 1256 gives individual taxpayers something unusual: the ability to carry a net Section 1256 loss back to the three preceding tax years. Corporations, partnerships, estates, and trusts cannot use the carryback. The amount you carry back to any given year is limited to the Section 1256 gains you reported on Schedule D for that year, and the carryback cannot create or increase a net operating loss. You elect the carryback in Part II of Form 6781.⁵ The loss goes to the earliest eligible year first, and you amend that year’s return to claim the refund.

Electing Out of Section 988

If you trade forex instruments that fall under Section 988, you can elect capital gain or loss treatment on a transaction-by-transaction basis. The statute requires you to identify each transaction you want treated as a capital asset in your records before the close of the day you enter the trade.¹ A note in a spreadsheet or trading journal dated that same day works. A retroactive designation at year-end does not.

The tradeoff is real. Electing capital treatment gets you the lower long-term capital gains rate on profitable trades, but converts your losses into capital losses subject to the $3,000 annual deduction cap.² A trader with $80,000 in Section 988 losses could deduct the full amount against wages under the default rules. The same trader, after electing capital treatment, could only deduct $3,000 that year and carry the rest forward. The election favors consistently profitable traders and can backfire on volatile ones.

The election covers only individual contracts that are not part of a straddle. It does not convert your entire forex activity to capital treatment. Each qualifying trade has to be identified separately, on the day it is entered. To revoke a prior election, document the revocation in your records before the start of the tax year; otherwise the election continues.

Converting Foreign Currency Amounts to Dollars

Your entire tax return has to be in U.S. dollars, so every foreign-currency amount needs converting. The general rule is to use the exchange rate on the date you received income, paid an expense, or closed a transaction. The IRS states you should use the rate prevailing when you receive, pay, or accrue the item, and that you can obtain rates from banks or U.S. Embassies.⁶ For income and expenses received regularly throughout the year, the IRS also publishes yearly average exchange rates that are acceptable for tax reporting.

Pick one source and stick with it for the entire year. Switching between your broker’s rates, a bank’s rates, and IRS published rates from trade to trade creates inconsistencies that are hard to defend in an audit. Most traders use the exchange rates their broker applies to transactions, since those are already documented on monthly statements. Keep records in both the foreign currency and the dollar equivalent, along with trade confirmations and a log of the rate applied to each conversion.

Extra Filings Large Losses Can Trigger

If your gross Section 988 forex loss reaches $50,000 or more in a single tax year, you must file Form 8886, Reportable Transaction Disclosure Statement, with your return.⁷ The threshold is based on the gross loss, not the net. For losses claimed under the general Section 165 rules (not specific to foreign currency), the threshold is much higher: $2 million in a single year or $4 million across a combination of years.

Any taxpayer who participates in a reportable transaction and must file a federal return is subject to this disclosure requirement, and failing to file carries its own penalty separate from any tax on the underlying transactions.⁸

Foreign Account Reporting

If you hold trading funds in accounts outside the United States, two separate reporting obligations kick in. Neither appears on your tax return itself, and meeting one does not excuse the other.

FBAR (FinCEN Form 114)

When the combined value of your foreign financial accounts exceeds $10,000 at any point during the calendar year, you must file FinCEN Form 114, commonly called the FBAR.⁹ This is an aggregate threshold: three accounts of $4,000 each cross it. The FBAR is filed electronically through FinCEN’s BSA E-Filing System, not with your tax return. The deadline is April 15 with an automatic six-month extension to October 15, so you do not need to request an extension separately.¹⁰

Form 8938

Form 8938, Statement of Specified Foreign Financial Assets, is filed with your tax return, and its thresholds are higher. An unmarried taxpayer living in the United States must file when specified foreign financial assets exceed $50,000 on the last day of the tax year or $75,000 at any time during the year. Married couples filing jointly have thresholds of $100,000 on the last day or $150,000 at any time.¹¹ Taxpayers living abroad have higher thresholds. The FBAR goes to FinCEN; Form 8938 goes to the IRS, and you may need to file both.¹²

If You Qualify for Trader Tax Status

Traders who trade frequently enough to qualify for “trader tax status” can make an additional election under Section 475(f) that changes their reporting entirely. There is no bright-line test. The IRS and courts look at trade frequency, holding periods, whether trading is a meaningful share of your income, and how much time you devote to it. A few trades a month does not qualify. Full-time trading with dozens of daily trades and short holding periods likely does.

If you qualify and elect under Section 475(f), all your trading gains and losses are treated as ordinary income or loss under the mark-to-market method. Open positions are treated as sold at fair market value on the last day of the year. Losses are fully deductible against other income without the $3,000 capital loss cap, and you are exempt from the wash sale rule.

Timing is strict. You must file the election statement with the IRS by the unextended due date of your prior year’s tax return. To make the election effective for 2026, the statement would have to be filed with your 2025 return by April 15, 2026. An existing trading business changing its accounting method also has to file Form 3115, Application for Change in Accounting Method. Miss the deadline and you wait a year.

Penalties and Estimated Tax

The IRS applies a 20% accuracy-related penalty on the portion of any tax underpayment caused by negligence or a substantial understatement. For individuals, a substantial understatement means you understated your tax by the greater of 10% of the correct tax or $5,000.¹³ Forex triggers this penalty more than most income types because classification errors can reclassify an entire year of trades.

The two most common mistakes: treating retail spot forex as Section 1256 contracts to claim the 60/40 split, and failing to make a timely same-day identification when electing out of Section 988. Either error can reclassify every affected trade, and interest runs on the underpayment from the original due date.

One more thing to plan for. Forex gains do not have tax withheld, so if you expect to owe $1,000 or more at filing you have to make quarterly estimated tax payments. Missing a quarterly deadline triggers an underpayment penalty calculated as interest on what you should have paid at each installment date.

1
Office of the Law Revision Counsel. 26 U.S. Code 988 – Treatment of Certain Foreign Currency Transactions
2
Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses
3
Office of the Law Revision Counsel. 26 U.S. Code 1256 – Section 1256 Contracts Marked to Market
4
Internal Revenue Service. About Form 6781, Gains and Losses From Section 1256 Contracts and Straddles
5
Internal Revenue Service. Form 6781 – Gains and Losses From Section 1256 Contracts and Straddles
6
Internal Revenue Service. Foreign Currency and Currency Exchange Rates
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Internal Revenue Service. Disclosure of Loss Reportable Transactions
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Internal Revenue Service. Requirements for Filing Form 8886 – Questions and Answers
9
Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)
10
FinCEN.gov. Report Foreign Bank and Financial Accounts
11
Internal Revenue Service. Instructions for Form 8938 – Statement of Specified Foreign Financial Assets
12
Internal Revenue Service. About Form 8938, Statement of Specified Foreign Financial Assets
13
Internal Revenue Service. Accuracy-Related Penalty