You need a brokerage account, money to invest, and a decision about which fund to buy

Buying a mutual fund means opening an account with a brokerage firm, depositing money, and placing an order for shares in the fund you want. The brokerage holds the account and executes the trade. You do not buy directly from the mutual fund company itself — you buy through an intermediary. The whole process typically takes a few days from start to finish, though your money may take longer to settle.

The mechanics are straightforward, but the decision about which fund to buy is separate from the mechanics of buying it. This article covers the how-to steps. Deciding which fund matches your goals and risk tolerance is a different question that depends on your situation.

Key Takeaways

  • You must open a brokerage account before you can buy any mutual fund, and you will need to provide identification and proof of address.
  • Most brokerages let you fund your account by bank transfer, check, or wire, and the money usually arrives within one to three business days.
  • Once your money is in the account, you search for the fund by its ticker symbol or name, enter the dollar amount or number of shares you want, and submit the order.
  • The order executes at the end of the trading day at the fund's net asset value (NAV), not at a price you can see in advance.
  • Settlement — when the fund shares officially become yours — typically takes two business days after the order executes.

Choose a brokerage and open an account

A brokerage is a financial firm licensed to buy and sell securities on your behalf. Common brokerages include Fidelity, Vanguard, Charles Schwab, E-Trade, and Merrill Edge, but there are many others. Some brokerages specialize in mutual funds; others offer mutual funds alongside stocks, bonds, and other investments. Some charge account fees; many do not.

To open an account, you will visit the brokerage's website, click a button to open a new account, and answer questions about your identity, address, employment, and investment experience. You will need a government-issued ID and proof of your current address (usually a recent utility bill or bank statement). The brokerage will verify this information, which usually takes a few minutes to a few hours. Some brokerages ask additional questions about your income or net worth, depending on the type of account you are opening.

You can open a regular taxable brokerage account, or you can open a retirement account like an IRA or 401(k) if you are self-employed. The account type affects how your gains are taxed, not how you buy the fund. The opening process is the same either way.

Fund your account with money to invest

Once your account is open, you need to move money into it. Most brokerages offer several ways to do this: electronic transfer from your bank (usually the fastest), mailing a check, or wire transfer. Electronic transfer typically takes one to three business days. The brokerage will show you its routing number and account number, or will let you link your bank account directly through your bank's website.

Some brokerages have a minimum deposit amount — often $500 to $1,000 — before you can buy a mutual fund. A few have no minimum. Check the brokerage's website or call to confirm whether there is a minimum and what it is.

The money sits in your account as cash until you place an order to buy a fund. You can leave it there as long as you want, or you can buy immediately. There is no penalty for waiting.

Find the mutual fund you want to buy

Once your money is in the account, log into your brokerage account and look for a search or research tool. You will search for the fund by its ticker symbol — a short code like VTSAX (Vanguard Total Stock Market Index Fund) or FSKAX (Fidelity Total Stock Market Index Fund). You can also search by the fund's full name, though the ticker is faster and more precise.

The brokerage will show you the fund's current price (called its net asset value, or NAV), its performance over different time periods, its expense ratio, and other details. Read this information to confirm you are looking at the right fund. Some funds with similar names have very different holdings or costs.

If you are not sure which fund to buy, you can use the brokerage's screening tools to filter funds by type (stock, bond, index, actively managed), by asset class (U.S. stocks, international stocks, bonds), or by expense ratio. Many brokerages also offer educational articles or fund comparisons to help you narrow down your choices.

Place your order and understand how pricing works

Once you have found the fund, click on it and select "Buy" or "Invest." The brokerage will ask you to enter either a dollar amount (for example, $5,000) or a number of shares. If you enter a dollar amount, the brokerage will calculate how many shares you get based on the fund's price at the end of the trading day.

Here is the key difference between buying a mutual fund and buying a stock: mutual fund prices are set once per day, at the close of the market (4 p.m. Eastern Time on weekdays). You cannot see the exact price before you submit your order. You will see the most recent price, but if you place your order at 2 p.m., the actual price you pay will be the price at 4 p.m. that day. This is called the end-of-day pricing rule, and it applies to all mutual funds.

After you enter the amount and review the order, click "Submit" or "Confirm." The order is now placed. You will receive a confirmation email with your order number.

Wait for settlement and confirm your shares

After you place your order, the fund executes at the end of that trading day at the NAV. Your order confirmation will show the price per share and the number of shares you received. Settlement — when the shares officially become yours and appear in your account — takes two business days. During this time, your cash is reserved and you cannot withdraw it, but the shares are not yet in your possession.

After settlement is complete, log into your account and you will see the fund shares listed under your holdings. You can now hold them, add to them, or sell them at any time. If you sell, settlement takes another two business days before the cash appears in your account.

Some brokerages offer fractional shares, which means you can buy a partial share if your dollar amount does not divide evenly by the share price. For example, if a fund costs $100 per share and you invest $150, you might get 1.5 shares instead of being forced to buy only 1 share. Not all brokerages or funds offer this, so check before you invest.

Understand ongoing costs and tax reporting

Once you own the fund, you will pay an expense ratio — an annual fee expressed as a percentage of your investment. A fund with a 0.05% expense ratio costs $5 per year for every $10,000 you invest. This fee is deducted automatically from the fund's value; you do not pay it separately. Index funds typically have lower expense ratios (0.03% to 0.20%) than actively managed funds (0.50% to 2.00% or higher).

At the end of each year, the brokerage will send you a tax form (usually a 1099 form) showing any dividends or capital gains the fund paid out. You will report this on your tax return, even if you reinvested the dividends back into the fund. If you held the fund in a retirement account like an IRA, you do not owe taxes on these distributions until you withdraw money from the account.

Frequently Asked Questions

Can I buy a mutual fund with just $100?

Many brokerages have no minimum investment, so yes. However, some funds themselves have a minimum initial investment of $500 to $3,000. Check both the brokerage's minimum and the specific fund's minimum before you open an account. If a fund has a high minimum, you can often buy it through a different brokerage that waives the minimum, or you can buy a similar index fund with no minimum.

What happens if I place an order after the market closes?

If you place an order after 4 p.m. Eastern Time on a weekday, or anytime on a weekend or holiday, the order will execute at the next day's closing price. The brokerage will show you when the order will execute. Settlement still takes two business days after execution.

Can I cancel an order after I place it?

You can cancel an order before the market closes that day. After 4 p.m., the order has executed and cannot be cancelled. If you want to undo the purchase, you will have to sell the shares, which counts as a separate transaction and may trigger capital gains taxes.

Do I have to reinvest dividends, or can I take them as cash?

Most brokerages let you choose. You can set the fund to automatically reinvest dividends back into more shares, or you can have dividends paid to your cash account. You can change this setting anytime. Reinvesting usually grows your investment faster over time, but taking cash gives you flexibility if you need the money.

What is the difference between buying a mutual fund and buying an ETF?

The main difference is pricing and timing. Mutual funds price once per day at the close; ETFs price continuously throughout the day like stocks. ETFs often have lower expense ratios and are more tax-efficient. The buying process is identical — you search, enter an amount, and submit an order through your brokerage. Which one to buy depends on your goals and preferences, not on the mechanics of buying.