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A business has 40 lakh of surplus cash sitting idle between a customer payment and a supplier bill six months in the future. A professional has a bonus earmarked for a purchase next year. In both cases, the surplus cash should not sit in a current account earning nothing and should not go into shares, because it is needed on a known date. This is the short-term investment problem, and the best short-term investment options India offers are a small set.
Two of those short-term investment options get compared most often. A short-term bond is a loan to a company or government paying fixed interest and returning your money on a set date. And an arbitrage fund, which earns its return from a price gap rather than interest. They look similar. Both are low volatility and suit money needed back within a year or two. But they earn in different ways and are taxed under different rules, which makes this a real short-term investment decision rather than a coin toss.
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How an Arbitrage Fund Actually Earns
The mechanics matter, because they explain why this short-term investment is taxed the way it is.
Say a share trades at 100 in the cash market and 102 in the futures market. The fund buys at 100 and simultaneously sells a futures contract at 102. When the contract settles, both prices converge, and the fund keeps the 2 rupee gap, whichever way the share moved. That is the whole strategy. It is market neutral, meaning the fund does not care whether shares rise or fall. When these gaps are scarce, the fund parks money in short-term debt instruments instead. Because the fund holds at least 65% in shares to run this trade, the Income Tax Act treats it as an equity fund [1]. That classification is the entire appeal.
The Tax Gap Is the Real Argument
This is where the short-term investment choice is actually decided.
An arbitrage fund is taxed as equity. Gains on units held under twelve months are taxed at 20%. Gains held beyond twelve months are taxed at 12.5%, with the first 1.25 lakh exempt each year [2]. No other short-term investment of this type gets that treatment.
Bonds, deposits, and short-term debt instruments are taxed differently. Interest is added to your income and taxed at your slab rate, which for anyone in the top bracket means 30% plus surcharge and cess. For someone in the 30% bracket parking a large sum, that difference is not small. On a 10 lakh gain, the gap between 30% and 12.5% is over 1.75 lakh. This is why advisers to business owners suggest arbitrage funds when asked where to park surplus cash.
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What You Give Up for That Tax Break
Everyone likes to save tax. But here the saving is not as simple as it looks, and it is worth seeing why before you choose.
The return is not fixed. The fund earns a small gap between two prices of the same share, one to buy it now and one to buy it a little later. That gap widens when the market is jumpy and shrinks when it is calm. In a quiet few months, the fund can earn less than a simple bank deposit. You do not know the return in advance.
The gap is small to start with, so costs eat into it. Budget 2026 raised one such cost, a tax on share trades called the securities transaction tax, trimming the return a little more.
Short-term debt instruments have none of this doubt. You know the rate on the day you buy and the day your money comes back. What you give up is the lower tax.
There is one point where the fund is safer. Your money is not lent to any single company, so one company failing to pay cannot hurt it. The trade is settled through the stock exchange instead. A corporate bond does carry that single-company risk. On that narrow point, the fund is the safer short-term investment.
What Each Option Pays and How It Is Taxed
These are the realistic places to park surplus cash you need back within a year or two.
| Indicative return | How it is taxed | Return certainty | |
| Savings account | 2.5% to 4% | Slab | Certain |
| Short-tenure bank FD | Around 6.8% | Slab | Certain |
| Treasury bills | Around 6.5% | Slab | Certain |
| Short-maturity corporate bond | 7% to 8% | Slab | Certain if held to maturity |
| Arbitrage fund | Varies with the price gap | 20% under 12 months, 12.5% beyond | Not fixed |
Frequently Asked Questions
The best short-term investment options India offers a few: a sweep-in or short-tenure fixed deposit, a liquid fund, an arbitrage scheme, treasury bills, and short-maturity bonds. Which wins depends on your tax bracket and when you need the money back, not on the highest headline rate.
Under twelve months, the equity tax advantage is smaller, since gains are taxed at 20% rather than 12.5%. That still beats a 30% slab rate. If you want certainty over tax efficiency, short-term debt instruments matched to your date are simpler.
Treasury bills, since they are government-backed and mature within a year. Bank fixed deposits come next, insured up to 5 lakh per bank. Arbitrage carries no credit risk, but its return is uncertain, which is a different risk from losing money.
No safe short-term investment pays a high return. These instruments currently sit in a band of roughly 6% to 7.5%. Anything promising far more over a few months is taking a risk that does not belong anywhere near the money you need on a fixed date.
If held for exactly twelve months, the comparison is close. Arbitrage taxed at 20% and a bond taxed at a slab might give similar post-tax outcomes for a mid-bracket investor. For a top-bracket investor, arbitrage usually wins, provided the spread holds.
No, not with any safe instrument. Doubling in five years needs about 14.9% every year, and no guaranteed product in India offers it. A short-term investment protects a known sum until a known date. It does not grow.
Conclusion
The choice comes down to what you value more, certainty or tax efficiency. If you are in the top bracket, parking surplus cash you can leave for more than twelve months, the arbitrage fund has a genuine advantage. Equity taxation on a low-volatility instrument is a real edge, with no credit risk attached. If you need to know the exact amount arriving on an exact date, short-term debt instruments matched to that date do the job better. The tax is higher, and the answer is certain.
What should not decide it is the headline yield. On a six-month decision, the gap between 6.8% and 7.1% is a rounding error next to the gap between 12.5% tax and 30% tax.
Sources
- Arbitrage fund taxation India 2026, Fincart
- Arbitrage fund taxation
- Arbitrage funds after the Budget 2026 STT hike, Finnovate
Disclaimer
Fixed returns do not constitute guaranteed or assured returns. Investments in corporate debt securities and municipal debt securities/securitized debt instruments are subject to credit risks, market risks, and default risks, including delay and/or default in payment. Read all the offer-related documents carefully. This blog/article should not be construed as financial advice or as an offer or recommendation to buy or sell any security or any products/services of/on GoldenPi or any product/services of its third-party client(s). For a detailed calculation of YTM, visit our website. T&C’s Apply.
