How Much Money Do I Need to Start Investing?
Updated July 9, 2026 · SmartRates Editorial Team
⚡ In short
There is no federally mandated minimum to open a brokerage account or buy an investment. Most major US brokerages have $0 account minimums, and fractional-share trading allows purchasing a portion of a stock or ETF for as little as $1–$5. Mutual funds are a separate product category that commonly carry an issuer-set minimum initial investment, often in the $500–$3,000 range, though this varies by fund.
📌 Key facts
- Most major US brokerages offer $0 account minimums and commission-free stock/ETF trades
- Fractional-share trading allows purchasing a dollar amount rather than a whole share
- Mutual funds — distinct from ETFs — often carry an issuer-set minimum initial investment
- SIPC coverage protects up to $500,000 per customer (including up to $250,000 in cash) if a brokerage fails — it does not cover investment losses
🏛️ Official sources
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Brokerage account minimums
Most major US brokerages have eliminated minimum deposit requirements to open a standard taxable brokerage account or an individual retirement account (IRA). Some specialized account types or managed portfolio services set their own minimums, separate from a standard self-directed account.
How fractional shares work
Fractional-share trading allows an investor to purchase a portion of a single share by specifying a dollar amount rather than a share quantity. This makes it possible to buy into ETFs or stocks priced at hundreds of dollars per share with a much smaller initial amount, commonly as low as $1–$5 depending on the broker.
Mutual fund minimums vs. ETF minimums
Mutual funds are a separate investment product from ETFs and are commonly subject to an issuer-set minimum initial investment, often in the $500–$3,000 range, though some fund families waive minimums for retirement accounts or automatic investment plans. ETFs, by contrast, are purchased like individual shares on an exchange and, with fractional-share support, generally have no comparable fund-level minimum.
Some mutual funds also set a lower minimum for subsequent investments than for the initial purchase, and many waive the initial minimum entirely for investors who set up a recurring automatic investment plan of a smaller fixed amount per period, which is a separate policy from the fund's standard lump-sum minimum.
Retirement account minimums specifically
Opening a traditional or Roth IRA carries no minimum under federal law, though the minimum to make the first investment inside that IRA depends on what's purchased — a $0-minimum ETF versus a mutual fund with its own issuer-set minimum. A workplace 401(k) has no comparable minimum either, since contributions are typically set as a percentage of each paycheck rather than a lump sum, and even a small percentage of a paycheck can be directed into the plan's investment options from the first contribution.
Costs beyond the initial investment amount
Beyond the amount needed to make a first investment, ongoing costs to consider include each fund's expense ratio, any advisory fee if using a managed account, and, for some account types, an annual account maintenance fee, though many brokerages have eliminated this fee for standard self-directed accounts. These recurring costs are separate from the one-time question of how much is needed to open an account or place a first trade.
Minimums for options and other advanced trading
Certain trading activities beyond buying stocks and ETFs outright — such as options trading or trading on margin (using borrowed funds from the broker) — carry their own eligibility requirements set by the broker, sometimes including a minimum account balance and an approval process based on trading experience and financial profile, separate from the general account-opening minimum. These requirements are set individually by each broker and are unrelated to the $0 minimum common for standard cash-account stock and ETF investing.
What SIPC coverage does and doesn't cover
The Securities Investor Protection Corporation (SIPC) protects brokerage customers if a SIPC-member firm fails financially, covering up to $500,000 per customer, including up to $250,000 in cash. SIPC coverage does not protect against a decline in the market value of investments — it addresses the failure of the brokerage firm itself, not investment losses. This is a distinct type of protection from FDIC deposit insurance, which covers bank deposit accounts rather than brokerage securities.
Automatic investing and recurring contributions
Most major brokerages support scheduling recurring automatic transfers and investments, which can be set to invest a fixed dollar amount at a chosen interval regardless of account size. This feature allows an investor to build a position gradually over time using dollar-cost averaging without manually placing each individual trade.
Robo-advisors and managed portfolios
Some providers offer automated, algorithm-managed portfolios — commonly called robo-advisors — as an alternative to self-directed investing. These services sometimes carry their own account minimums, separate from a standard self-directed brokerage account, along with an advisory fee calculated as a percentage of assets under management, which is a different cost structure than the per-fund expense ratio charged by the underlying ETFs or funds held in the portfolio.
Frequently Asked Questions
Is there a required minimum, like $1,000, to start investing?+
No. With fractional-share trading and $0 account minimums at most major brokerages, there is no required minimum dollar amount to open an account or make a first investment.
Is there a minimum to open a Roth IRA?+
There is no federal minimum. Individual brokerage or fund providers may set their own account minimums, which vary by provider.
Does SIPC coverage protect against a stock or ETF losing value?+
No. SIPC coverage applies if a brokerage firm itself fails; it does not insure against investment losses from market price declines.
Is SIPC coverage the same as FDIC deposit insurance?+
No. SIPC covers brokerage securities and cash if a brokerage firm fails; FDIC insurance covers bank deposit accounts. They are separate protection systems for different account types.
Do robo-advisors have their own minimum investment requirement?+
Some do, separate from a standard self-directed brokerage account minimum — requirements vary by provider, along with the advisory fee structure charged for the automated management.
Does a brokerage charge a fee just to hold cash in an account?+
Most standard brokerage accounts do not charge a fee for holding uninvested cash, though the cash may earn little to no interest unless swept into an interest-bearing option offered by the broker.