How to Start Currency Trading in India: USD/INR Lot Sizes, Costs and Rules

What currency trading actually means in India

When Indians say currency trading, two very different things get mixed up. The legal, exchange-traded version is currency derivatives, futures and options on the rupee, offered by the National Stock Exchange (NSE) and the Bombay Stock Exchange (BSE) and regulated by the Securities and Exchange Board of India (SEBI). The other version is overseas spot forex sold through offshore apps and tipster groups, where you supposedly trade pairs like USD/JPY with 1 to 500 leverage. That second version is not permitted for resident Indians and has been the subject of repeated RBI and SEBI alert lists. This guide is strictly about the regulated exchange route.

On the regulated side you are not buying or holding physical dollars. You are buying or selling a standardised contract whose value tracks the exchange rate. Each contract has a fixed lot size, a fixed tick size and a fixed expiry. Because the contract is standardised, the maths of profit and loss is fixed too, which is exactly where most beginners get tripped up. Getting the lot size right is the single most important thing on this page, so we will be very precise about it.

The Reserve Bank of India (RBI) controls which pairs may be traded and the broad framework under the Foreign Exchange Management Act, while SEBI and the exchanges set the contract specifications, margins and position limits. The two regulators work together, so a contract you see on the NSE currency segment is something both have signed off on. That is your safety check, if a product is not listed on the NSE or BSE currency segment, a resident Indian generally should not be trading it.

The contract specs you must memorise

Every currency future on the NSE is quoted as rupees per one unit of the foreign currency, but the contract controls a fixed quantity of that foreign currency. For USD/INR that quantity is 1,000 US dollars per lot. So if USD/INR is quoted at 83.50, the full notional value of one lot is 1,000 dollars times 83.50, which is Rs 83,500. You do not pay that full amount, you post margin, but the notional is what your profit and loss is calculated on.

The other number that matters is the tick size, the smallest price step. For USD/INR futures the tick is 0.0025 rupees. Because one lot is 1,000 dollars, one tick is worth 1,000 times 0.0025, which is Rs 2.50 per lot. A full one paisa move (0.0025 x 4) is Rs 10 per lot, and a full one rupee move is Rs 1,000 per lot. Memorise that last figure, one rupee equals Rs 1,000 per lot, because it is the heart of the worked example below and it is exactly what the old version of this page got muddled.

A correctly worked USD/INR example

Here is the example the old page fumbled, done properly. Suppose you expect the rupee to weaken, meaning USD/INR will rise. You buy USD/INR futures at 83.50. The first decision is how many lots, not how much money. Say you buy 5 lots. Each lot is 1,000 dollars, so you control 5,000 dollars of notional, which is 5,000 times 83.50, or Rs 4,17,500 of exposure. Crucially, you do not deposit Rs 4,17,500. You post margin.

Currency futures margin (SPAN plus exposure) is roughly 2 to 4 percent of notional. At about 3 percent, 5 lots would block roughly Rs 12,500 to Rs 13,000 of your capital. Now the rate moves to 84.50, a clean one rupee move in your favour. Per lot, one rupee equals Rs 1,000, so your gross profit is 1,000 rupees times 5 lots, which is Rs 5,000. Notice the profit came from the number of lots and the rupee move, never from the size of your account. That is the exact mistake to avoid, a one rupee move on one lot is Rs 1,000, and on five lots is Rs 5,000, full stop.

Now subtract costs, because they are real. On exchange-traded currency derivatives there is no Securities Transaction Tax (STT), STT applies to equity and equity F&O, not the currency segment. Instead you pay exchange transaction charges, GST on brokerage and charges, SEBI turnover fees and stamp duty, plus your broker fee. For a 5 lot round trip a discount broker might charge a flat brokerage of around Rs 20 to Rs 40 each side, and the statutory bits add up to a few tens of rupees more. Call total costs roughly Rs 120 to Rs 180 for this trade. Your net would be about Rs 4,820 to Rs 4,880. All figures here are illustrative and there is no guaranteed outcome, the rate could equally have fallen to 82.50, turning the same position into a Rs 5,000 gross loss.

• Decide lots first: 5 lots of USD/INR = 5,000 USD notional.
• Notional at 83.50 = 5,000 x 83.50 = Rs 4,17,500 (this is exposure, not cash paid).
• Margin blocked at about 3 percent = roughly Rs 12,500 to Rs 13,000.
• Rate moves 83.50 to 84.50, a Re 1 move. Per lot that is Rs 1,000.
• Gross profit = Rs 1,000 x 5 lots = Rs 5,000.
• Less costs of roughly Rs 120 to Rs 180, net is about Rs 4,820 to Rs 4,880.

Why leverage cuts both ways

In the example above, you put up around Rs 13,000 of margin and a one rupee move produced Rs 5,000. That is close to a 38 percent return on margin from a move of barely 1.2 percent in the rate. This is the seductive part of currency futures, and also the dangerous part. The same 1.2 percent move against you wipes out nearly 40 percent of your margin. A two rupee adverse move on those 5 lots is a Rs 10,000 loss, which is most of your blocked margin and can trigger a margin call from your broker.

Because losses are calculated on the full notional but you only posted a sliver as margin, your loss can in principle exceed the margin you deposited. This is why position sizing matters more than entry timing. A practical rule used by disciplined traders is to risk no more than 1 to 2 percent of total trading capital on any single position. If your capital is Rs 2,00,000, that is Rs 2,000 to Rs 4,000 of risk per trade, which with a sensible stop loss might mean only 2 or 3 lots, not 5. You can model these scenarios with a position sizing approach before you ever place the order, see our risk management guide.

Futures versus options in the currency segment

The NSE currency segment offers both futures and options. Futures are the simpler instrument, your profit and loss moves rupee for rupee with the rate as shown above. Currency options let you pay a premium for the right, not the obligation, to buy (call) or sell (put) at a chosen strike. Options cap your loss at the premium paid when you are a buyer, which many beginners find more comfortable than the open-ended risk of a naked futures position.

Say USD/INR is at 83.50 and you buy a one rupee out of the money 84.50 call expiring this month for a premium of, illustratively, 0.20 rupees. One option lot is also 1,000 dollars, so the premium you pay is 0.20 times 1,000, which is Rs 200 per lot. Buy 5 lots and you have paid Rs 1,000 total, and that Rs 1,000 is the most you can lose. If the rate rallies to 85.00 by expiry, the call is worth 0.50 rupees intrinsic, which is Rs 500 per lot, or Rs 2,500 across 5 lots, a Rs 1,500 net gain before costs. If the rate stays below 84.50, the option expires worthless and you lose your Rs 1,000 premium, nothing more. These are illustrative numbers, not a promise of returns.

Expiry and settlement mechanics

Currency derivatives on the NSE expire on a monthly cycle, with the last trading day typically two working days before the last business day of the month. Unlike equity index options, currency contracts are cash settled in rupees, you never take delivery of actual dollars. Settlement uses the RBI reference rate published for the relevant currency, so your final profit or loss is marked against that official rate, not against your broker quote.

This matters for two reasons. First, you should know your expiry date before you enter, an out of the money option you are holding into expiry can decay to zero quickly in the last days, the time value bleeds out. Second, because settlement is cash and reference rate based, you avoid the operational hassle of currency conversion, but you also cannot escape an adverse settlement by simply not closing the position. Open positions are squared off automatically at expiry against the reference rate, and the resulting profit or loss hits your account.

• Monthly expiry, last trading day usually two working days before month end.
• Cash settled in rupees against the RBI reference rate, no physical dollar delivery.
• Option time value decays fastest in the final days before expiry.
• Open positions are auto squared off at expiry, you cannot opt out of settlement.

What it costs to trade and the tax treatment

On a currency derivatives trade your costs are brokerage, exchange transaction charges, GST at 18 percent on brokerage and exchange charges, SEBI turnover fees, and stamp duty on the buy side. There is no STT in the currency segment, which is a genuine cost advantage over equity F&O where STT applies. A flat fee discount broker typically charges a small fixed brokerage per executed order, often in the Rs 20 to Rs 40 range, which keeps total costs low relative to the notional you control.

On tax, currency futures and options profit is treated as business income, exactly like equity F&O, not as capital gains. That means it is added to your total income and taxed at your applicable slab rate, and it is reported under business income in your return, not under capital gains. The flat 20 percent short term capital gains rate and the 12.5 percent long term rate above Rs 1.25 lakh that apply to equity delivery do not apply here. A useful side effect of business income treatment is that genuine trading expenses, such as data subscriptions, broker charges and internet, may be deductible, and losses can be set off and carried forward subject to the rules. Tax law changes, so confirm the current position with a qualified chartered accountant before you file.

SEBI rules, permitted pairs and position limits

SEBI restricts what you can trade. Against the rupee, only four pairs are permitted, USD/INR, EUR/INR, GBP/INR and JPY/INR. In addition, three cross currency pairs are allowed, EUR/USD, GBP/USD and USD/JPY, which let you take a view on one major currency against another without the rupee leg. Anything outside this set, offered by an offshore broker, is not part of the regulated Indian framework and carries legal as well as counterparty risk.

The exchanges also enforce position limits, caps on how large a single client or member can get in a contract, to prevent any one participant from distorting the market. As a retail trader you are unlikely to hit these limits early, but you should know they exist and that your broker monitors them. All of this only works if you trade through a SEBI-registered broker on a recognised exchange. Before funding an account, verify the broker on the SEBI and exchange member lists, and never route money to an unregistered platform promising guaranteed currency profits, that is the classic structure of a scam.

• Permitted rupee pairs: USD/INR, EUR/INR, GBP/INR, JPY/INR.
• Permitted cross pairs: EUR/USD, GBP/USD, USD/JPY.
• Trade only via a SEBI-registered broker on the NSE or BSE currency segment.
• Respect exchange position limits, your broker tracks these for you.
• Treat any offshore guaranteed return forex offer as a red flag and avoid it.

A practical first month checklist

Start small and mechanical. Open a trading account with a SEBI-registered broker, complete KYC with your PAN and Aadhaar, and activate the currency derivatives segment, which is usually a separate enablement from equity. Fund only what you can afford to lose, and for your very first trades use a single lot so that a one rupee move is a manageable Rs 1,000, win or lose.

Before placing any order, write down your entry, your stop loss in rupees per lot, your target and your maximum lots. Use a market order only when you need certainty of execution, otherwise prefer a limit order so you control your price. Track every trade, the rate, the lots, the costs and the outcome, in a journal so you can see whether your edge is real or imagined. Discipline, not prediction, is what separates traders who survive from those who churn their account to zero.

• Verify your broker on the SEBI and exchange member lists before funding.
• Enable the currency derivatives segment separately from equity.
• Trade 1 lot for the first few weeks so each rupee move is just Rs 1,000.
• Predefine entry, stop loss in rupees per lot, target and max lots before every trade.
• Prefer limit orders for price control, use market orders only when speed matters.
• Journal every fill, charge and settlement, business income tax needs the records.

Sources and further reading

For authoritative data and current contract specifications, refer to Reserve Bank of India, SEBI and NSE India. Lot sizes, tick sizes, margins, permitted pairs and tax rules can change, so always confirm the current numbers on the official source before you trade. Nothing here is a recommendation or a promise of returns, and all figures are illustrative.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to Reserve Bank of India, SEBI (Securities and Exchange Board of India), NSE India and Investopedia. Always confirm current rules, rates and contract specifications on the official source before you trade.