A non-deliverable forward, or NDF, is a cash-settled contract that lets two parties lock in an exchange rate for a future date without ever exchanging the underlying currencies. It exists because many emerging-market currencies are subject to capital controls that prevent foreigners from freely buying or selling them offshore. Instead of delivering, say, Korean won or Chinese yuan at maturity, the contract settles the difference between the agreed rate and the actual market rate as a single payment, almost always in U.S. dollars.
How the Contract Works
A standard foreign exchange forward requires both parties to deliver the full notional amount of each currency on the settlement date. An NDF skips that step. The two parties agree on an exchange rate, a notional amount, and a future date. When that date arrives, whoever is on the wrong side of the rate movement pays the other party the cash difference. No restricted currency ever changes hands.
Every NDF hinges on three dates and one external data point:
- Trade date: the day both parties agree on the contract rate, notional amount, and currency pair.
- Fixing date: the day the official spot rate is observed from a pre-agreed reference source, typically one or two business days before settlement.
- Settlement date: the day the cash payment moves between counterparties, usually one or two business days after the fixing date.1Commodity Futures Trading Commission. Non-Deliverable Forward Transaction
- Fixing rate: the official exchange rate pulled from the agreed reference source on the fixing date, usually a central bank publication or a widely accepted interbank benchmark.
The time between the trade date and the settlement date can range from one day to ten years, though the most actively traded tenors are one month, three months, six months, and one year.1Commodity Futures Trading Commission. Non-Deliverable Forward Transaction
Because settlement is always in a freely convertible currency, neither party needs to move the restricted currency across borders. A company hedging its Indian rupee exposure never touches rupees at all. It enters an NDF, and on settlement day it either receives or pays a dollar amount reflecting how much the rupee moved.
A Worked Example
The math itself is straightforward. On the fixing date, the official spot rate is compared to the contract rate. The difference is multiplied by the notional amount, then converted to the settlement currency at the fixing rate.
Consider a $10 million NDF on the Brazilian real (BRL) with an agreed rate of 5.0000 BRL per USD. On the fixing date, the official rate comes in at 5.1000. The real has weakened against the dollar, meaning the party that agreed to buy dollars at 5.0000 has locked in a better rate than the market now offers.
The rate difference is 0.1000 BRL per dollar. Multiply that by the $10 million notional and you get BRL 1,000,000. Convert that to dollars at the fixing rate of 5.1000, and the settlement payment comes to roughly $196,078. That amount moves from the losing side to the gaining side on the settlement date, and the contract is done.
If the real had strengthened instead, and the fixing rate came in at 4.9000, the payment would flow the other way. The party that agreed to sell dollars at 5.0000 would owe the difference. Every NDF produces exactly one cash flow, in one direction, on one day.
Why the Product Exists
A meaningful share of the world’s currencies cannot be freely traded outside their home countries. Central banks in countries like India, China, South Korea, Taiwan, and Brazil impose various capital controls that restrict how much local currency foreigners can access, convert, or move across borders. A multinational earning Chinese yuan revenue can’t always execute a standard forward offshore to hedge that exposure, because the yuan can’t be freely delivered outside China’s tightly managed domestic system.
The NDF market developed to fill this gap. It grew up in offshore financial centers, outside the jurisdiction of countries with convertibility restrictions.2Federal Reserve Bank of New York. An Overview of Non-Deliverable Foreign Exchange Forward Markets Users fall into two camps. Corporates and institutional investors use NDFs to hedge real economic exposures such as receivables, payables, or investment returns denominated in a restricted currency. Hedge funds and speculative traders use them to take directional bets on currencies they can’t access directly.
Most NDF activity runs through New York and London, which means these contracts are governed by the legal framework of the jurisdiction where they’re traded, not the restricted currency’s home country. That gives participants a level of legal predictability they wouldn’t get inside the domestic regulatory environment of the currency they’re hedging.
Who Trades NDFs
The NDF market is over-the-counter, meaning trades happen bilaterally between counterparties rather than on a central exchange. Major international banks function as the primary market makers, quoting prices to their corporate and institutional clients.2Federal Reserve Bank of New York. An Overview of Non-Deliverable Foreign Exchange Forward Markets When a bank writes an NDF for a customer, it takes on currency risk that it then manages by offsetting positions with other banks.
Contracts are typically documented under the ISDA Master Agreement framework, incorporating the 1998 FX and Currency Option Definitions published jointly by ISDA, EMTA, and the Foreign Exchange Committee. EMTA publishes standardized template terms for each currency pair that specify which fixing source to use, along with business day conventions and other operational details. That standardization reduces the friction of negotiating bespoke terms on every trade.
The Onshore-Offshore Rate Gap
A persistent feature of NDF markets is that offshore NDF rates often diverge from the onshore forward rates quoted within the restricted currency’s home market. The gap exists because the two markets have different participants, different liquidity, different trading hours, and different exposure to central bank intervention. Capital controls prevent arbitrage from quickly closing the spread the way it would in freely traded pairs.
The size and direction of this gap carries real economic significance. When the offshore rate makes hedging expensive relative to onshore rates, foreign investors may sell their local-currency assets rather than pay the premium to hedge. That selling pressure can ripple through bond and equity markets. When the NDF rate signals a different outlook than domestic markets, it gives a useful gauge of how international investors view the currency’s prospects outside the influence of domestic policy.
Risks to Understand Before Trading
Counterparty Risk
Because most NDF trades remain bilateral OTC agreements, the primary risk is that the other side fails to pay on settlement day. If a counterparty defaults between trade and settlement, the surviving party loses whatever gain the contract was worth. Netting agreements and collateral arrangements reduce this exposure but don’t eliminate it. Central clearing, where available, substitutes the creditworthiness of a clearinghouse for that of the individual counterparty.
Liquidity Risk
Some NDF currencies trade actively enough that unwinding a position is relatively painless. Others, particularly smaller frontier-market currencies, can be thinly traded. A large position in one of these pairs may be difficult to exit without moving the market against you. This is especially true during periods of political or economic stress in the currency’s home country, precisely when participants most want to adjust their exposures.
Fixing Rate Risk
The entire settlement depends on one number: the official fixing rate observed on the fixing date. If the reference source changes its calculation methodology, delays publication, or is perceived as setting a rate that doesn’t reflect actual market conditions, the settlement amount becomes contentious. This risk is unique to NDFs and doesn’t exist in deliverable contracts where the parties simply exchange currency at whatever rate they agreed to. Participants manage it partly through EMTA’s standardized fallback provisions, which specify alternative fixing sources if the primary source is unavailable.
How U.S. Regulators and the IRS Treat NDFs
The regulatory treatment of NDFs in the United States hinges on a distinction that trips up even experienced market participants. In 2012, the U.S. Treasury Department issued a determination exempting foreign exchange swaps and foreign exchange forwards from the Commodity Exchange Act’s definition of “swap.” That exemption applies only to deliverable FX forwards and FX swaps. Treasury explicitly stated that NDFs do not satisfy the statutory definitions of a foreign exchange swap or forward and therefore cannot be exempted.3Federal Register. Determination of Foreign Exchange Swaps and Foreign Exchange Forwards Under the Commodity Exchange Act
The practical consequence is that NDFs are regulated as swaps under Dodd-Frank. That classification triggers several requirements. NDF transactions must be reported to a swap data repository, giving regulators visibility into the size and concentration of positions across the market.4eCFR. Title 17 Chapter I Part 45 – Swap Data Recordkeeping and Reporting Requirements Swap dealers that trade NDFs are subject to registration, capital, and conduct requirements. Uncleared NDF positions between covered entities are subject to initial and variation margin requirements. Outside the United States, European rules under EMIR impose similar risk-mitigation obligations on uncleared NDFs, including timely confirmation, portfolio reconciliation, daily mark-to-market valuation, and collateral exchange for covered counterparties.5European Securities and Markets Authority. Article 11 Risk-Mitigation Techniques for OTC Derivative Contracts Not Cleared by a CCP
On the tax side, NDF gains and losses generally fall under Internal Revenue Code Section 988, which governs transactions in nonfunctional currencies. The IRS classifies forward contracts denominated in a nonfunctional currency as Section 988 transactions, meaning any gain or loss is treated as ordinary income or loss rather than capital gain or loss, and is sourced based on the taxpayer’s residence.6Internal Revenue Service. Overview of IRC Section 988 Nonfunctional Currency Transactions
Ordinary treatment is favorable when you have losses, since they offset ordinary income without the $3,000 capital loss limitation, but unfavorable when you have gains, which are taxed at your full marginal rate rather than the lower long-term capital gains rate. Some taxpayers explore whether an NDF can qualify as a “foreign currency contract” under Section 1256, which provides a 60/40 split (60 percent of the gain or loss treated as long-term, 40 percent as short-term) regardless of holding period.7Office of the Law Revision Counsel. 26 U.S. Code 1256 – Section 1256 Contracts Marked to Market
The catch is the statute’s definition. A foreign currency contract under Section 1256 must involve a currency “in which positions are also traded through regulated futures contracts.”7Office of the Law Revision Counsel. 26 U.S. Code 1256 – Section 1256 Contracts Marked to Market Most NDF currencies are restricted precisely because they lack deep, freely traded derivatives markets. If no regulated futures contract exists for the currency underlying the NDF, the Section 1256 election is unavailable and the default Section 988 ordinary treatment applies. A tax advisor familiar with both currency derivatives and the specific NDF currency pair is worth consulting before taking a position on either treatment.