How to Report Forex Income on Your Tax Return

How you report forex income on your tax return depends on which section of the tax code governs your trades. Most retail forex activity falls under Section 988 and gets reported as ordinary income on Schedule 1 of Form 1040. A narrower category of regulated contracts falls under Section 1256 and gets reported on Form 6781, where a 60/40 blended rate applies. Pick the wrong track and you can face a 20% accuracy-related penalty on top of the tax you already owe.¹

First, Figure Out Which Rule Applies to Your Trades

Before you can choose a form, you need to know which bucket your trades belong in. The Section 1256 definition of “foreign currency contract” is narrow. 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.²

That 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 ordinary income treatment.³

A quick signal: if your broker’s year-end tax statement does not break out Section 1256 contracts separately, your trades are almost certainly Section 988 transactions. The 60/40 treatment is not something you simply opt into; it applies automatically to contracts that meet the statutory definition.

Reporting Under Section 988 (Most Retail Traders)

If you stayed under the default Section 988 rules, your net forex gain or loss goes on Schedule 1 (Form 1040) as other income. On the 2025 version of Schedule 1, this falls under 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.³ The amount then flows into your adjusted gross income on Form 1040.

Ordinary treatment means your gains are taxed at your marginal income tax bracket, which reaches 37% for high earners. The compensating advantage sits on the loss side. Because Section 988 losses are ordinary losses rather than capital losses, they offset your other income dollar-for-dollar. You are not stuck with the $3,000 annual cap that applies to net capital losses.⁴ A trader with $80,000 in net Section 988 losses can deduct the full amount against wages and other income in the same year.

Reporting Under Section 1256 (Regulated Futures and Qualifying Forwards)

If your forex contracts qualify as Section 1256 contracts, you report them on Form 6781, Gains and Losses From Section 1256 Contracts and Straddles. The form handles 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 realized gains and losses from closed trades with unrealized gains and losses on positions still open at year-end.⁵

You enter the total net figure in Part I of Form 6781. The form splits that amount into 60% long-term and 40% short-term, regardless of your actual holding period. The long-term portion flows to Line 11 of Schedule D (Capital Gains and Losses); the short-term portion flows to Line 4 of Schedule D.⁶ Schedule D then feeds your net capital gain or loss into Form 1040.

Carrying Back a Net Section 1256 Loss

Section 1256 lets individual taxpayers carry a net loss back to the three preceding tax years. Corporations, partnerships, estates, and trusts cannot use this carryback. The amount carried 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 make the election in Part II of Form 6781.⁶ The carryback goes to the earliest eligible year first, which can mean amending an older return and recovering tax already paid.

Electing Capital Treatment Out of Section 988

If you trade 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.³ A dated note in a spreadsheet or trading journal that same day works. A retroactive designation at year-end does not.

Elected transactions go on Form 8949 (Sales and Other Dispositions of Capital Assets), listing each trade with its date acquired, date sold, proceeds, and cost basis. The net results carry to Schedule D, where they combine with your other capital gains and losses. Because elected trades land on a different form than your remaining Section 988 activity, you have to track which is which.

The tradeoff cuts both ways. Capital treatment lowers the rate on gains but subjects losses to the $3,000 annual deduction cap if they exceed your capital gains.⁴ The election applies only to individual contracts that are not part of a straddle, and it does not automatically convert all your forex activity. To revoke a prior election, document the revocation in your records before the start of the tax year.

Extra Forms Triggered by Your Situation

Form 8886 for Large Losses

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 amount, not the net. For losses claimed under the general Section 165 rules (not specific to foreign currency), the threshold is 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 missing it carries its own penalty separate from the tax on the underlying trades.⁸

FBAR (FinCEN Form 114)

If 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 It’s an aggregate threshold: three accounts with $4,000 each would push you over. 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 don’t need to request an extension separately.¹⁰

Form 8938

Form 8938, Statement of Specified Foreign Financial Assets, is a separate requirement filed with your tax return. For an unmarried filer living in the United States, Form 8938 is required 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, and taxpayers living abroad have higher thresholds still.¹¹ The FBAR and Form 8938 overlap in coverage but serve different agencies, so filing one does not excuse you from the other.¹²

Converting Foreign Currency Amounts to Dollars

Your entire tax return must be in U.S. dollars, so every foreign-currency figure needs converting. The IRS rule is to use the exchange rate prevailing when you receive, pay, or accrue the item, and it states you can obtain rates from banks or U.S. Embassies.¹³ For income and expenses received regularly throughout the year, the IRS publishes yearly average exchange rates that are acceptable for tax reporting.

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

Common Mistakes That Trigger Penalties

The IRS applies a 20% accuracy-related penalty on the portion of any tax underpayment caused by negligence or substantial understatement. For individuals, a substantial understatement means you understated your tax by the greater of 10% of the correct tax or $5,000.¹ Two mistakes account for most forex-related penalties.

The first is treating retail spot forex as Section 1256 contracts to claim the 60/40 split. Retail spot trades do not meet the statutory definition, and reclassifying an entire year of trades from capital to ordinary income creates a large discrepancy.

The second is a missed same-day identification when electing out of Section 988. Without a contemporaneous record dated the day you entered the trade, the election fails and the IRS treats those gains and losses under the default rule. On top of the 20% penalty, interest runs on the underpayment from the original due date of the return.

One boundary worth noting: a different regime, the Section 475(f) mark-to-market election, is available to traders who qualify for trader tax status, which generally requires frequent, substantial, and continuous trading activity. If that describes you, the forms and timing above are not the full picture, and the Section 475(f) election has its own filing deadline tied to the prior year’s unextended due date.

1
Internal Revenue Service. Accuracy-Related Penalty
2
Office of the Law Revision Counsel. 26 U.S. Code 1256 – Section 1256 Contracts Marked to Market
3
Office of the Law Revision Counsel. 26 U.S. Code 988 – Treatment of Certain Foreign Currency Transactions
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Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses
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Internal Revenue Service. About Form 6781, Gains and Losses From Section 1256 Contracts and Straddles
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Internal Revenue Service. Form 6781 – Gains and Losses From Section 1256 Contracts and Straddles
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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
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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
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Internal Revenue Service. About Form 8938, Statement of Specified Foreign Financial Assets
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Internal Revenue Service. Foreign Currency and Currency Exchange Rates