Mutual Funds: What They Are and How They Actually Work
You know what a stock is. You know that picking individual stocks is hard, risky, and most people lose money doing it. You also know that keeping money in a savings account means losing to inflation every year.
So what’s the middle ground? How do you get stock market returns without becoming a full-time stock analyst?
Mutual funds. That’s the answer for most people, and this article explains exactly how they work.
The simplest way to understand a mutual fund
Imagine 1,000 people each put ₹10,000 into a common pot. That’s ₹1 crore. They hire a professional fund manager and say: “Invest this money in good stocks. We trust your judgement.”
The fund manager buys shares of 50-80 companies. Some large, some mid-sized, depending on the fund’s strategy. Each of the 1,000 investors owns a small slice of that entire portfolio.
If the portfolio grows 15%, everyone’s ₹10,000 becomes ₹11,500. If it drops 10%, everyone’s ₹10,000 becomes ₹9,000. You share the gains and the losses proportionally.
That’s a mutual fund. Mutual because the money is pooled together. Fund because it’s a pool of money managed professionally.
Why mutual funds exist
Buying stocks directly has three big problems for regular people:
- You need knowledge. Which company to buy? When to buy? When to sell? Reading balance sheets, understanding P/E ratios, tracking quarterly results. Most people don’t have time for this.
- You need a lot of money to diversify. If you want to own 50 stocks to spread your risk, you need lakhs. One share of MRF costs over ₹1 lakh alone.
- You need discipline. When Nifty drops 20%, your instinct says sell. That’s usually the worst thing to do. A fund manager doesn’t panic. That’s their job.
Mutual funds solve all three. A professional picks the stocks. Your ₹5,000 gets spread across 50-80 companies. And the fund manager sticks to a strategy regardless of short-term noise.
NAV: the price of one unit
When you invest in a mutual fund, you don’t buy “shares.” You buy units. Each unit has a price called the NAV (Net Asset Value).
NAV = (Total value of all stocks in the fund - expenses) ÷ Number of units
If a fund holds stocks worth ₹500 crore, has expenses of ₹2 crore, and 10 crore units outstanding, the NAV is ₹49.80.
When you invest ₹10,000 in a fund with NAV ₹49.80, you get about 200.8 units. If the NAV rises to ₹55 next year, your 200.8 units are worth ₹11,044. That’s your return.
Important: A low NAV doesn’t mean a fund is “cheap.” This confuses a lot of beginners. Say Fund A has a NAV of ₹10 and Fund B has a NAV of ₹200. You might think Fund A is a better deal. It’s not. Fund B’s NAV is ₹200 because it has been growing for years. If both funds grow 10% next year, your ₹10,000 grows to ₹11,000 in either case. The NAV number doesn’t matter. What matters is how fast it grows.
Expense ratio: what the fund charges you
The fund manager, the research team, the office, the compliance, none of it is free. The fund charges you an annual fee called the expense ratio.
If a fund has an expense ratio of 1.5%, it means ₹1.50 out of every ₹100 you invest goes towards running the fund, every year. This is deducted from the NAV automatically. You don’t pay it separately.
| Expense ratio | Annual cost on ₹1 lakh invested |
|---|---|
| 0.5% | ₹500 |
| 1.0% | ₹1,000 |
| 1.5% | ₹1,500 |
| 2.0% | ₹2,000 |
This looks small, but over 20 years it adds up massively. A 1% difference in expense ratio can mean lakhs less in your final corpus. This is why direct plans (which have lower expense ratios) are better than regular plans. More on that in a separate article.
Types of mutual funds (the quick version)
Mutual funds come in many flavours. You don’t need to remember all of this right now. This is just to give you a basic map so you know what’s out there.
By what they invest in
| Type | What it buys | Risk | Who it’s for |
|---|---|---|---|
| Equity funds | Stocks | High | Long-term goals (7+ years) |
| Debt funds | Government bonds, corporate bonds | Low | Short-term goals (1-3 years) |
| Hybrid funds | Mix of stocks and bonds | Medium | People who want some equity exposure with less volatility |
By company size (equity funds)
| Type | What it means | Example companies |
|---|---|---|
| Large-cap | Top 100 companies by market value | Reliance, TCS, HDFC Bank |
| Mid-cap | Companies ranked 101-250 | Persistent Systems, Indian Hotels |
| Small-cap | Companies ranked 251+ | Smaller, newer companies |
| Flexi-cap | Fund manager picks across all sizes | Mix of large, mid, small |
Large-cap funds are more stable but grow slower. Small-cap funds can grow faster but are more volatile. They can drop 30-40% in a bad year.
Index funds
There’s another category worth knowing about: index funds. Instead of a fund manager picking stocks, an index fund simply buys all the stocks in an index like Nifty 50, in the same proportion. No human judgement involved, and much lower fees (0.1-0.2% expense ratio vs 1-1.5% for actively managed funds). For most beginners, an index fund is the simplest and safest starting point. We’ll cover index funds in detail in a separate article.
How to buy a mutual fund
You don’t need a demat account or a trading account for mutual funds (unlike stocks). You can buy directly through:
- AMC websites (the fund house itself): HDFC MF, ICICI Prudential, SBI MF, etc.
- Online platforms: Groww, Kuvera, Zerodha Coin, Paytm Money
- Your bank’s app: Most banks offer mutual fund investments
All you need is your PAN, Aadhaar, and a bank account. The first time, you’ll need to complete a one-time KYC (Know Your Customer) process. Most platforms do this online in a few minutes.
Direct vs Regular plans: Every mutual fund comes in two versions. “Direct” has a lower expense ratio because there’s no distributor commission. “Regular” costs more because it pays a commission to whoever sold it to you. Always buy Direct. Platforms like Groww and Kuvera sell Direct plans. If your bank or advisor is selling you a mutual fund, it’s probably a Regular plan.
SIP vs Lump sum
You can invest in a mutual fund in two ways:
SIP (Systematic Investment Plan): A fixed amount auto-debited from your bank every month. ₹5,000, ₹10,000, whatever you decide. This is the best approach for most people because you don’t need to time the market. When prices are low, your SIP buys more units. When prices are high, it buys fewer. Over time, your cost averages out.
Lump sum: Investing a large amount at once. If you have ₹2 lakh sitting in your savings account and want to invest it. This works fine if you’re investing for 10+ years, because short-term market movements won’t matter much over that period.
For salaried people with a monthly surplus, SIP is almost always the right choice. Set it up and forget it.
Taxes on mutual funds
This is where people get confused, but it’s straightforward:
Equity mutual funds (funds that invest 65%+ in stocks)
| Holding period | Tax type | Tax rate |
|---|---|---|
| Less than 1 year | Short-term capital gains (STCG) | 20% |
| More than 1 year | Long-term capital gains (LTCG) | 12.5% (above ₹1.25 lakh/year) |
If your equity fund gains are less than ₹1.25 lakh in a financial year and you’ve held for over a year, you pay zero tax on those gains.
Debt mutual funds
Gains from debt mutual funds are added to your income and taxed at your income tax slab rate, regardless of how long you held them.
Common mistakes beginners make
Chasing past returns. A fund returned 40% last year, so you invest in it. Last year’s topper is rarely next year’s topper. Look at 5-year and 10-year returns, not 1-year.
Too many funds. Having 8-10 mutual funds doesn’t mean better diversification. Most large-cap funds hold similar stocks. Two or three well-chosen funds are enough.
Stopping SIP when the market drops. This is the worst time to stop. Your SIP is buying more units at lower prices. That’s exactly what you want. The people who kept their SIPs running through the 2020 COVID crash saw excellent returns by 2021-22.
Ignoring expense ratio. A 1.5% expense ratio vs 0.2% doesn’t sound like much. Over 20 years on ₹10,000/month, that difference is over ₹8-10 lakh. Pick direct plans. Pick low-cost index funds when possible.
Redeeming too early. Equity mutual funds are meant for 7+ years. If you need money in 2 years, use a debt fund or an FD. Don’t put short-term money in equity and then blame the market when it drops.
Not checking the lock-in period. Some mutual funds have mandatory lock-ins. ELSS (tax-saving) funds lock your money for 3 years. Retirement funds can lock you in until you turn 58. Certain close-ended funds lock you in for 3-5 years. You can’t withdraw early no matter what.
I once bought a retirement mutual fund without reading the fine print. Turned out the money was locked in for 3 years. I didn’t need the tax benefit, and I had better options. But the money was stuck. Now I always check the lock-in period before investing. Five minutes of reading the scheme document can save you years of regret.
What should you actually do?
If you’ve read this far and haven’t started yet, here’s your action plan:
- Download Groww or Kuvera. Complete KYC. Takes 10-15 minutes.
- Pick one fund. A Nifty 50 index fund (Direct plan) is a great starting point. Low cost, diversified, no fund manager risk.
- Start a SIP. ₹5,000/month is enough. Even ₹1,000 is fine. The amount matters less than starting.
- Set it and forget it. Don’t check NAV daily. Don’t stop when the market drops. Let compounding do its work over 10-15-20 years.
You can always add more funds later as you learn more. But the first step is getting started with one.
The bottom line
Now that you know where to invest, it’s time to understand how taxes work on your investments and salary. Read next: Taxes in India: A Beginner Guide.