When you invest in a mutual fund, the first thing you receive is units. These units decide how much of the scheme you own, how your investment value changes with NAV, and how much money you get when you exit.

This blog explains what mutual fund units mean, how NAV decides their price, how units are allotted in lump sum and SIP, and what happens during redemption. Once you understand units, tracking returns and withdrawals becomes much easier.

What is a unit in a mutual fund?

A mutual fund unit shows your share in a mutual fund scheme. When you invest money in a fund, you don’t directly buy the stocks or bonds inside it; you buy units.

Each unit represents a small portion of the scheme’s total investments. The value of one unit is linked to the fund’s Net Asset Value (NAV), which is calculated using the total value of the fund’s holdings after adjusting for expenses and liabilities.

Example:

Assume a scheme has net assets (assets minus liabilities) of ₹10,000,000, and total units outstanding are 100,000.

NAV per unit = ₹10,000,000 / 100,000 = ₹100.
If you invest ₹10,000, the units you get are: Units = ₹10,000 / ₹100 = 100 units

As the prices of the securities inside the fund move up or down, the NAV changes, and your unit value changes too.

How does a mutual fund unit price work?

A mutual fund invests in different assets such as shares, bonds, and cash instruments. The value of the entire portfolio, after subtracting expenses or liabilities, is divided by the total number of units. This per-unit value is called the NAV (Net Asset Value).

NAV formula:

NAV = (Total value of assets − Total liabilities) / Total units outstanding

So, if the value of the fund’s investments rises, the NAV goes up. If the portfolio value falls, the NAV also falls. NAV is usually calculated at the end of each market day, which is why mutual funds do not trade like stocks, whose prices change throughout the day.

Example:

Suppose a mutual fund has total assets worth ₹50 crore, liabilities of ₹2 crore, and 4 crore units outstanding.

Then:

NAV = (₹50 crore − ₹2 crore) / 4 crore
NAV = ₹48 crore / 4 crore = ₹12

This means each unit of the mutual fund has a NAV of ₹12. If the value of the fund’s portfolio rises the next day, the NAV will increase too.

How are mutual fund units calculated?

Units in a mutual fund are allotted based on the applicable NAV on the day your transaction is processed. In simple words, your investment amount is divided by the NAV to find out how many units you get.

Formula:

Units received = Investment amount / Applicable NAV

Example:

If you invest ₹1,000 and the NAV is ₹50, you will get:

₹1,000 ÷ ₹50 = 20 units

So, your ₹1,000 investment gives you 20 units of the mutual fund.

SIP vs lump sum (quick clarity)

In a lump sum, you buy units once at one NAV.
In a SIP, you buy units many times, and each SIP instalment gets units at that day’s applicable NAV.

That’s why SIPs often show different purchase prices across months.

Importance of units in mutual funds

Units are important because they show what you own, how your investment value changes, and how much you’ll get when you exit.

They help you in these ways:

Shows your ownership: The number of units you hold tells you your share in the mutual fund scheme. More units = a larger share of the fund.
Value changes through NAV: Your unit count stays the same, but the value of each unit changes daily as the NAV moves up or down.
Makes return tracking simple: At any point, you can estimate your investment value using: Units × NAV. This makes gains and losses easy to calculate.
Helps during redemption: When you redeem, the payout is based on how many units you sell and the applicable NAV (minus exit load or other charges, if any).

Things to know about mutual fund units

Units represent your share in the mutual fund’s total portfolio.
The unit value changes as the NAV changes.
NAV depends on the market value of the securities held by the fund.
NAV is calculated using net assets divided by units outstanding.
You buy and sell units based on the applicable NAV.
Plans/options exist (like Growth and IDCW), which decide how payouts happen.
Units can be held through AMC platforms, apps, registrars, or broker platforms.

How to Purchase and Redeem Mutual Fund Units?

You can buy mutual fund units through AMC websites, mutual fund apps, registrars, or broker platforms. You can invest through a lump sum (one-time) or a SIP (fixed amount at regular intervals).

Redeeming means selling your units back to the fund to withdraw money. In most online platforms, you select the scheme, enter the number of units or amount to redeem, and submit the request.

Your payout depends on the applicable NAV. For example, if you redeem 100 units and the NAV is ₹20, the redemption value is ₹2,000.

Before redeeming, check:

Exit load: some funds charge a fee if you withdraw within a set period.
Tax impact: taxation depends on whether it’s an equity or debt fund and how long you held it.

Because of exit load and taxes, the final amount credited can be slightly different from the NAV-based value.

Growth vs IDCW options in mutual funds

Growth and IDCW are plan options, not types of units. They decide how returns are handled—either reinvested in the scheme or paid out as distributions.

Growth option:
The fund does not pay you periodically. The scheme keeps any gains made, allowing your wealth to grow over time as the NAV increases. This option is preferred by investors aiming for long-term growth.

IDCW option (earlier called dividend option):
The fund may pay out part of its surplus as IDCW when it declares a distribution. After a payout, the NAV often falls because the amount is deducted from the scheme’s value. IDCW is chosen by investors who want occasional cash flows, but payouts are not guaranteed.

Factors: Equity shares vs. mutual fund units

Factors	Equity shares	Mutual fund units
Ownership	Share in one specific company	Share in a pooled portfolio
Diversification	Concentrated in one company	Spread across multiple assets
Risk	Higher due to single-stock impact	Lower due to diversification (not risk-free)
Management	No fund manager involvement	Managed by a professional fund manager
Volatility	Often sharper price swings	Usually smoother due to the basket approach
Dividends	Paid if the company declares	Paid only if IDCW payout is declared

Mutual fund units are how your investment in a scheme is measured. The number of units you hold shows your share in the fund, while their value changes with the NAV, which is calculated daily from the fund’s portfolio value.

Once you understand units, NAV, allotment, and redemption, it becomes much easier to track your investment, understand returns, and make smarter decisions, whether you invest through a lump sum or SIP.

A good next step is to check the NAV, units held, and current value in your own mutual fund statement or app. That will help you connect these concepts to a real investment and understand how mutual funds work in practice.

1) Are mutual fund units the same as shares?

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2) Can I get fractional units in mutual funds?

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3) Does a higher NAV mean the fund is better?

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4) When do I get the NAV for my purchase or redemption?

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5) What charges should I check before redeeming?

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