Cost of Carry in Futures: Meaning, Formula and Example
Blog by Aliceblue News Desk
13 November 2026
10 minutes
Quick Answer
Cost of carry is the interest you pay to hold shares until a futures contract expires, minus the dividends those shares pay in that time. Add it to today’s price, and you get an estimated fair price for the futures contract. It helps you judge pricing. It does not tell you whether the market will rise or fall.
Say Nifty is at 25,000 and the Nifty futures contract is quoted at 25,160. Many new traders see that gap and wonder if the futures price is wrong, or if they are being charged extra. Neither is true. The gap mostly comes from the cost of carry in futures, and this guide shows how to calculate it and what it can and cannot tell you.
Table of Contents
Table of Contents
What Is Cost of Carry in Futures?
Cost of carry is the net cost of holding an asset until the futures contract ends. For equity futures, NSE describes it as the cost of financing minus the dividend returns.
A few terms first:
- Spot price is the price in the cash market today.
- A futures contract is an exchange-traded agreement to buy or sell an asset at a fixed price on a set date. That date is the expiry.
- Financing cost is the interest you pay on borrowed money, or the interest you give up when your own money is tied up.
- A dividend is a share of a company’s profit paid to its shareholders.
Suppose you want exposure to Nifty stocks for a month. You could buy the shares and pay in full, which ties up your money. Or you could buy a futures contract and put down only a margin, which is a deposit collected as security. The futures price includes the interest you save by not paying in full. It also removes the dividends, because a futures buyer does not receive them.
Cost of carry is a pricing idea built into the futures price. Your broker does not charge it as a separate fee. Brokerage, taxes, and exchange charges are the real costs on your contract note.
Cost of Carry Formula: How to Calculate It
For a basic index or equity example, use this simple version:
Fair futures price = Spot price + Spot price × (interest rate minus dividend rate) × days to expiry ÷ 365
Here is how to work it out:
- Note the spot price of the share or index.
- Choose an interest rate. A short-term market rate is a reasonable guide.
- Estimate the dividends paid before expiry, as a yearly rate.
- Subtract the dividend rate from the interest rate. This is the net carry rate.
- Divide the days left to expiry by 365.
- Multiply spot, the net carry rate, and the day fraction. Add the result to spot.
Some textbooks use a compounding formula, which gives a slightly different answer. For learning, the simple version is enough.
The cost of carry gets smaller every day because fewer days of interest remain. On expiry day, the futures price and the spot price meet.
Example With Nifty Numbers
These numbers are for explanation and are not live prices.
Inputs
- Nifty spot: 25,000
- Interest rate: 5.5% a year, close to the RBI repo rate of 5.50% after the October 2026 policy
- Expected dividend rate: about 1.4% a year, close to the Nifty 50 dividend yield shown by market data sites
- Days to expiry: 30
Calculation
- Net carry rate: 5.5% minus 1.4% = 4.1% a year
- Cost of carry: 25,000 × 4.1% × 30 ÷ 365 = about 84 points
- Fair futures price: 25,000 + 84 = about 25,084
What the market shows
Now suppose the futures contract trades at 25,160.
Item | Value |
Spot price | 25,000 |
Fair value (calculated) | about 25,084 |
Market futures price | 25,160 |
Premium over spot | 160 points |
Premium over fair value | about 76 points |
The 160-point premium works out to about 7.8% a year (160 ÷ 25,000 × 365 ÷ 30). This is the rate implied by the market price. It is not a return anyone promises you.
What a buyer experiences
A trader buys one Nifty futures lot at 25,084. At expiry, Nifty settles at 25,000, the same level where it began. The trader loses 84 points.
Nifty futures currently trade in lots of 65 units, a size that applies to contracts from January 2026. The loss on one lot is 84 × 65 = ₹5,460 before brokerage and other charges. One lot is worth about ₹16.3 lakh at this index level, so even a small price move changes your account by a large amount. Lot sizes get revised from time to time, so check the current size on the NSE website before you trade.
The premium you pay at the start shrinks to zero by expiry. If the market only stays flat, a buyer who paid that premium takes a loss.
Key Features of Cost of Carry
Interest makes up the largest part of carry for equity futures. Dividends reduce it. It shrinks as expiry gets closer, and it is an estimate, since real futures prices also depend on demand and supply.
It also differs by asset. Commodity futures can include storage and insurance, and currency futures depend on interest rates in two countries.
Positive vs Negative Cost of Carry
When interest costs are higher than dividends, the cost of carry is positive and futures trade above spot. This is called contango.
When expected dividends are higher than the financing cost, the cost of carry turns negative and futures can trade below spot. This is called backwardation. Heavy selling pressure can also push futures below spot.
A small discount near a big dividend date is usually just arithmetic. A large and lasting discount deserves a closer look at the market.
Advantages
Understanding cost of carry helps you in a few practical ways.
- You can check whether a futures price sits close to its estimated fair value or far above it.
- When you roll a position to the next month, you can see how much premium you are paying. Rollover means closing a near-expiry position and opening one in the next expiry.
- You understand why a flat market can still cause a loss on a futures purchase.
- You see why arbitrage keeps price gaps small. Arbitrage means taking offsetting positions in spot and futures to try to benefit from a price gap.
- You can compare the total cost of holding shares with the cost of holding futures, including charges and dividends you would miss.
Risks and Limitations
- Fair value is an estimate. Interest rates and dividend dates change, so your result can be off. Real prices can also stay away from fair value for days.
- Futures are leveraged, which means a small margin controls a much larger contract value. A small move against you causes a large loss compared with the money you put up. Positions are also marked to market every day, so profits and losses are settled in your account daily. You may need to add funds at short notice.
- Brokerage, taxes and other charges can wipe out small price gaps. Test them on a brokerage calculator before acting on any price difference.
- There is a behavioural risk too. Traders often read a high or low premium as a buy or sell signal. It is not one, and acting on it alone leads to poor decisions.
- SEBI’s FY26 study found that 87.7% of individual traders in equity derivatives lost money, and 66.1% of futures traders had net losses. Across FY25 and FY26 together, options made up 91.6% of individual net losses.
Is Cost of Carry Good for Beginners to Learn?
Yes, learning it is useful. Trading futures is a different matter. The SEBI figures above show that most individual traders in this segment lose money, so beginners should treat futures as a high-risk product and only use money they can afford to lose.
If you do trade futures, a few habits help:
- Practise the calculations on paper for a few weeks first.
- Check the dividend calendar before judging a stock future’s premium.
- Check the lot size and expiry date on the NSE website.
- Use the margin calculator to see how much capital a position needs.
- Read the pricing page so you know every charge.
- Decide your maximum loss before you enter. A stop-loss order can fill at a worse price in a fast market, so size your trade with that in mind.
- Learn how a contract works in our futures trading guide.
Buying Shares vs Buying Futures
Parameter | Buying shares | Buying futures |
Capital needed | Full amount | Margin only |
Ownership | You own the shares | No ownership |
Dividends | You receive them | You do not |
Time limit | None | Ends at expiry |
Carry cost | Your interest or lost interest | Built into the price |
Risk | Loss limited to the amount invested | Loss can exceed the margin |
Cost of Carry vs Basis
Basis here means futures price minus spot price.
Parameter | Cost of Carry | Basis |
What it is | Estimated cost of holding till expiry | Actual gap between futures and spot |
Based on | Interest, dividends, days left | Live market prices |
Nature | Calculated | Observed |
At expiry | Zero | Zero |
Use | Estimate fair value | See how far futures are from spot |
If the basis is much larger or smaller than the cost of carry, the market is pricing in something more than simple holding cost, such as demand or an upcoming dividend.
Common Mistakes to Avoid
- Treating carry as a broker fee. It sits inside the price. Check your contract note for real charges.
- Skipping dividends. For a stock with a large dividend due, fair value falls. Count only dividends paid before expiry.
- Reading the premium as direction. A high premium does not mean the market will rise, and a low one does not mean it will fall.
- Using the wrong day count. Count the days to the actual expiry date.
- Forgetting rollover cost. Moving to the next month means paying that month’s premium too.
- Ignoring costs. A small price gap rarely survives brokerage and taxes.
Who Should Use This Concept?
It suits traders who hold futures for days or weeks and roll positions, and investors who hedge a portfolio with index futures. It also helps learners who plan to move on to options trading and want to understand pricing first.
It matters less for investors who only buy shares for delivery. Intraday traders also gain little from it, because the premium barely changes within a day and price movement matters more.
Conclusion
Cost of carry explains why futures usually trade above spot. It combines the interest on money you would otherwise lock up, less expected dividends, over the days left to expiry. Use it to estimate fair value and to see how much premium you are paying. Do not use it to guess market direction. The premium falls to zero by expiry, and futures are leveraged. Check the lot size, margin, and all charges before you place a trade.
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