Arbitrage Funds vs Bank FD: How to Save Income Tax on Your Savings
If you're sitting in the 30% income tax bracket, your bank FD isn't really giving you the interest rate printed on the certificate. Once tax and cess eat into it, an FD advertised at 7% can quietly shrink to under 5% in your hand. And if you keep renewing that FD year after year, you end up paying tax on the same growing pile of money again and again.
There's a lesser-known alternative that behaves a lot like an FD — steady, low-drama returns — but is taxed completely differently. It's called an arbitrage mutual fund, and understanding it could change how you park your safe money.
The Real Problem With Bank FDs
Say you earn ₹100 through hard work. After income tax plus cess (roughly 31.2% if you're in the highest slab), you're left with about ₹68.80 to save.
Now put that into a bank FD earning 6% a year. The ₹6,000 interest you earn is added to your taxable income every single year — whether or not you touch the money. At the same 31.2% rate, your effective post-tax return drops to around 4.1%, not 6%.
Renew the FD, and the process repeats. Each year's interest gets taxed again the moment it's credited. This isn't technically "double taxation," but it is repeated taxation on money you never asked to withdraw.
What Is an Arbitrage Fund?
An arbitrage fund is a type of hybrid mutual fund that profits from price differences between the cash (spot) market and the futures market — not from betting on whether a stock goes up or down.
Here's the simplified mechanic:
- A stock trades at, say, ₹1,322 in the cash market.
- The same stock's futures contract (expiring a month or two later) trades at a premium — say ₹1,341.70.
- The fund buys the stock in cash and simultaneously sells the futures contract.
- On expiry, the price difference is locked in as profit — regardless of whether the stock price goes up or down in between.
This is called arbitrage, and it's what gives these funds FD-like stability. The fund manager does this across many stocks at scale, and the fund's NAV grows in a fairly smooth, predictable line — similar to what you'd expect from a fixed deposit, not a volatile equity fund.
Why Arbitrage Funds Are Taxed Like Equity (Not Like FDs)
This is the part that makes arbitrage funds interesting for tax planning. Even though they behave like debt instruments, Indian tax law classifies arbitrage funds as equity funds because of their underlying stock exposure. That means:
| Bank FD | Arbitrage Fund | |
|---|---|---|
| Taxed annually, even if not withdrawn | Yes | No |
| Tax treatment | Slab rate (up to 31.2%+) | Equity capital gains rules |
| Short-term gains (sold before 1 year) | Slab rate | 20% |
| Long-term gains (held over 1 year) | Slab rate | 12.5%, and tax-free up to ₹1.25 lakh per year |
| Tax event | Every year, automatically | Only when you actually sell/redeem |
Because you only pay tax on the gain portion at the time of withdrawal — and only above the ₹1.25 lakh LTCG exemption — a large chunk of the return can end up completely tax-free, especially if you're not booking large annual profits.
A Rough Numbers Comparison
- A bank FD advertised at ~11% can effectively net you around 7.5% after tax in the highest slab.
- An arbitrage fund with a pre-tax 3-year CAGR of around 7.5% can let you keep almost all of it, since most investors' long-term gains from these funds stay well under the ₹1.25 lakh exemption threshold.
In other words, two investments with similar headline numbers can leave you with very different amounts in hand once tax is applied.
Which Arbitrage Funds to Look At
By assets under management (a rough proxy for liquidity and scale), some of the larger arbitrage funds in India include:
- Kotak Equity Arbitrage Fund — one of the largest by AUM
- SBI Arbitrage Opportunities Fund
- ICICI Prudential Equity Arbitrage Fund
Larger AUM generally means the fund manager has more opportunities to create arbitrage positions across a wider set of stocks, which can help consistency of returns.
Direct Plan vs Regular Plan: Don't Skip This Step
This is where a lot of investors lose returns without realizing it. Mutual funds come in two flavors:
- Direct Plan — bought straight from the AMC (or via a direct-plan platform), with no distributor commission baked in.
- Regular Plan — bought through a broker or advisor, who earns a trailing commission for as long as you stay invested.
The difference isn't trivial. A fund that returns ~7.5% CAGR as a Direct Plan can drop to under 7% as a Regular Plan, purely because of the ongoing commission. If you're buying through a broker's app and the fund name doesn't explicitly say "Direct Plan," you're very likely in a Regular Plan.
How to check: Look for "Direct Plan – Growth" explicitly in the scheme name before you invest. Most AMC apps (or direct-investment platforms) default to showing this correctly, but broker apps often default to Regular Plans.
Is This Right for You?
Arbitrage funds aren't a guaranteed-return product — they're a market-linked mutual fund, and returns can vary. Like any equity-linked investment, they carry market risk, and past performance doesn't guarantee future returns. Before investing, it's worth checking with a registered investment advisor about whether this fits your goals, time horizon, and risk appetite.
That said, for money you don't need to touch for a year or more — money that would otherwise just sit in a low-yielding, heavily-taxed FD — arbitrage funds are worth understanding as an alternative.
Key Takeaways
- Bank FD interest is taxed every year, even if you never withdraw it.
- Arbitrage funds are taxed only on withdrawal, under equity capital gains rules — often much lighter than slab-rate FD taxation.
- Long-term gains from arbitrage funds are tax-free up to ₹1.25 lakh per year.
- Always check whether you're buying a Direct Plan — Regular Plans quietly reduce your returns through commissions.
- This is not tax or investment advice — consult a SEBI-registered advisor before making decisions.
Disclaimer: This article is for educational purposes only and does not constitute investment or tax advice. Mutual fund investments are subject to market risk. Please read all scheme-related documents carefully and consult a registered investment advisor before investing.
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