How Pooled Investing Works in India — Units, NAV, Costs and Structure
Published • August 2026 | ⏱ 8 min read | Beginner
● 1. What Is a Mutual Fund○ 2. Why They Work○ 3. Types of Funds○ 4. How to Choose○ 5. SIP vs Lump Sum○ 6. Taxation○ 7. Common Mistakes○ 8. Build a Portfolio
A mutual fund is a professionally managed investment pool. A large number of investors contribute money into one common account. The fund uses that money to buy shares, bonds or other permitted securities, according to a written investment objective. You do not hold those underlying shares or bonds in your own demat account. You hold units of the fund. Each unit represents your proportionate share of the pool on that day.
This structure exists so that a household investing ₹5,000 a month can own a diversified basket that would be difficult to build and maintain stock by stock. The rest of this series — types of funds, SIPs, tax and portfolio construction — is built on this single idea. If the pool is clear, the later articles will be easier to follow.
"A mutual fund does not eliminate market risk. It organises ownership so that you do not have to select and monitor each security yourself.
— MoneyChanakya
The MoneyChanakya Framework
2nd W of Wealth
How the Pool Works
Suppose you invest ₹5,000 in an open-ended equity fund on a given business day. Several thousand other investors may invest on the same day, and some existing investors may redeem. The fund receives and pays out cash, and the manager invests the net amount according to the scheme’s mandate — for example, a diversified portfolio of listed Indian companies.
Your legal claim is not “50 shares of Company A.” It is a stated number of units. If the value of the securities in the pool rises, the value of each unit rises. If those securities fall, the value of each unit falls. New investors who enter later receive units at the then-prevailing price. Investors who leave receive cash based on the same price. The pool continues.
In India, mutual funds are regulated by the Securities and Exchange Board of India (SEBI). The securities are held by a custodian, not in the personal account of the fund manager. A board of trustees oversees the asset management company on behalf of unitholders. A registrar maintains the record of how many units each investor owns. These separations exist so that the pool is treated as investor money under a regulated structure, not as the private cash of the company whose name appears on the scheme.
Units and NAV
NAV stands for Net Asset Value. It is the per-unit price of the fund on a given day. In principle it is calculated as follows: take the market value of all securities and cash the fund holds, subtract liabilities and accrued expenses, and divide by the number of units outstanding.
An illustration, using round numbers rather than a live quote:
Item
Amount
Market value of securities and cash
₹100 crore
Less: liabilities and accrued expenses
₹20 lakh
Net assets
₹99.80 crore
Units outstanding
1 crore
NAV per unit
₹99.80
If you invest ₹9,980 when the NAV is ₹99.80, you are allotted 100 units. If, over time, the portfolio rises and the NAV becomes ₹110, those 100 units are worth ₹11,000. If the NAV falls to ₹90, they are worth ₹9,000. The number of units you hold does not change unless you invest more, redeem, or receive additional units under a dividend reinvestment option. What changes is the value of the underlying pool.
Most open-ended funds in India declare a NAV on every business day. Purchases and redemptions are processed at that day’s NAV, subject to the cut-off time stated in the scheme documents. You do not negotiate a price with another investor, as you would when buying a listed share on the exchange.
A higher NAV does not mean the fund is “expensive,” and a lower NAV does not mean it is “cheap.” ₹10,000 invested at a NAV of ₹20 buys 500 units; the same ₹10,000 at a NAV of ₹200 buys 50 units. You have invested the same amount of money. What matters after that is how the portfolio performs — not whether the printed NAV looks small.
Who Manages the Fund
The Asset Management Company (AMC) is the firm that sponsors and runs the scheme. It appoints the fund manager and the research team. The fund manager takes day-to-day investment decisions within the limits of the scheme information document. An actively managed flexi-cap fund gives the manager discretion to change the mix of companies. A Nifty 50 index fund gives almost no such discretion; the portfolio is designed to mirror a published index.
Trustees, the custodian and the registrar perform the oversight and record-keeping roles described earlier. You, as the unitholder, interact with the fund through the AMC, a bank, a distributor, or a registered advisor. Units can be held in a statement of account or in demat form, depending on how you invest.
Most first-time investors benefit from a distributor or advisor who understands the household’s goals and who remains available when markets fall. The presence of that relationship is not a sign that the investor is unsophisticated. For many families, the difficulty is not filling an application. It is remaining invested through an uncomfortable year. This series will treat that support as a legitimate part of the process, not as something to be avoided in the name of lower costs alone.
What You Pay
The fund charges an annual fee, recovered from the pool, called the expense ratio. It covers investment management, operations and distribution. You do not write a separate cheque for it. The NAV you see is already after these expenses have been accounted for.
On a holding of ₹2 lakh, an expense ratio of 1.5 per cent works out to about ₹3,000 a year. That is a real cost, and it compounds over long periods, so it should be understood. It is also how the fund is staffed and administered. Cost is one factor in choosing a scheme. It is not the only factor. A slightly cheaper plan that the investor abandons in a decline can prove more expensive, in outcome, than a reasonably priced plan that the investor continues.
Some schemes also levy an exit load if units are redeemed within a stated period (for example, one year). The applicable load is set out in the scheme document of the fund you actually buy. There is no single number that applies to every mutual fund in India.
How a Mutual Fund Differs from Related Products
Mutual fund
What it is not
A market-linked pool whose value changes with its holdings
A fixed deposit. An equity fund does not offer a contracted rate of interest
Units representing a share of a portfolio
Direct ownership of each stock in your demat account
An investment product regulated as a mutual fund
A ULIP, which combines insurance and investment under a different cost and claim structure
A scheme you can typically redeem on a business day (if open-ended), subject to exit load
NPS, which is a retirement account with separate exit, annuity and tax rules
It is also important not to treat “mutual fund” as one risk level. A liquid fund, which invests in very short-term money-market instruments, and a small-cap equity fund, which invests in smaller listed companies, are both mutual funds. Their possible decline in a difficult year is not comparable. Article 3 of this series explains the main categories. The only point required here is that the legal structure is shared; the investment risk is not.
Open-ended funds, which are the funds most households use for SIPs, allow purchase and redemption on business days. Closed-ended funds have a fixed term and limited liquidity before maturity. Those distinctions belong with fund types. They do not change the basic meaning of a unit or a NAV.
Did You Know?
Two investors who put in the same rupee amount on different dates will own a different number of units, because they bought at different NAVs. Their later experience depends on how the portfolio moves after each of them entered — not on whose NAV happened to look smaller on the statement.
A Real Household Story
Bhavna, who works in Madurai, avoided mutual funds for several years because a relative told her that a fund with a NAV of ₹200 was “too expensive.” She instead bought two individual shares recommended by a colleague. One of those shares fell sharply. She sold both holdings and returned the money to fixed deposits. Sometime later, her advisor explained the unit arithmetic: ₹10,000 at a NAV of ₹200 buys 50 units; ₹10,000 at a NAV of ₹20 buys 500 units. The amount invested is the same. The printed NAV is only the current price of one slice of the pool. What had been risky in her earlier experiment was concentration in two companies, not the fact that a mutual fund’s NAV had reached ₹200. She began a monthly investment in one diversified equity fund, through the advisor who was prepared to speak with her when the first negative month appeared on the statement.
MoneyChanakya Insight
It is worth understanding the pool, the unit and the NAV before studying categories, SIPs or tax. Those later topics assume that the investor already knows what is being bought.
Common Mistake
Treating every mutual fund as “safe” because the industry is SEBI-regulated, or treating every mutual fund as speculation because an equity fund declined last year. Regulation governs how the pool is run. It does not govern whether equity markets rise in a particular twelve-month period.
Key Takeaways
A mutual fund is a regulated pool. Investors own units; the fund owns the securities.
NAV is the daily per-unit value of that pool. A high NAV is not, by itself, a reason to avoid a fund.
SEBI, trustees, the custodian and the registrar exist to separate investor assets from the AMC’s own books.
The expense ratio is an annual cost already reflected in NAV. Exit load, where applicable, is stated in the scheme document.
The structure is shared across very different funds. Risk depends on what the fund is allowed to hold.
Guidance that helps an investor stay invested through difficult periods is part of the value of the arrangement for most households.
The next article explains why this structure can work over long periods — and the conditions under which it does not.
Continue Your Wealth Creation Journey
Why Mutual Funds Work
The next article examines diversification, the scheme mandate, and the role of time — along with the investor behaviours that prevent those advantages from showing up in the statement.
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