Correction: We corrected cash-investing claims, research units, investment-risk comparisons and withdrawal-tax summaries. See corrections and updates.
A Roth IRA is an account, not an investment. What belongs inside depends on your time horizon, willingness and ability to bear losses, other savings and costs. Broad stock funds, bond funds, target-date funds, individual securities, CDs and cash can serve different purposes. This guide explains those choices without selecting funds or recommending a portfolio for you.
First, check what your money is doing
In a self-directed brokerage account, a cash contribution may remain in a settlement fund, core position or bank sweep until a purchase instruction is carried out. An automatic-investment or managed-account arrangement may invest it for you. A rollover may also arrive as investments rather than cash. Do not assume either “deposited” or “IRA” means the allocation you intended is already in place.
Open the holdings or positions view and inspect the actual investments, cash balance and pending orders. A balance that barely moves on one market day is not reliable evidence of how the account is invested.
Cash is not automatically a mistake. A bank sweep may earn interest; a money-market fund can pay distributions. Their yields, fees and protections differ. The question is whether the cash position is deliberate and fits your needs, not whether cash is capable of earning or compounding.
A research finding—with the denominator attached
Vanguard's July 2024 study examined a sample of its IRA investors who made contributions or rollovers in 2022. After 12 months, 55% of direct-contribution investors and 28% of rollover investors in that sample still had the assets in cash or cash equivalents. These are percentages of sampled investors, not percentages of contributed dollars, and not a current industry-wide estimate.
Choose the job before the investment
Your time horizon is when you expect to need the money. Risk tolerance includes both the losses you can financially absorb and the uncertainty you are comfortable living with. A long horizon can provide more time to recover from a decline, but it does not guarantee a recovery or make a concentrated investment safe.
Consider the portfolio across your accounts, not just the Roth in isolation. A stock-only Roth might be one part of a stock-and-bond household portfolio, or it might represent almost all your savings. Those are different situations. See asset placement for the cross-account question.
The main investment categories
| Category | What it does | What to check |
|---|---|---|
| Broad stock fund | Spreads stock exposure across many companies | Markets covered, concentration, fees and ability to tolerate stock-market losses; a stock fund alone is not a stock-and-bond portfolio |
| Bond fund | Holds debt securities and distributes income | Interest-rate and credit risk; bond funds can lose value and are not insured deposits |
| Target-date fund | Combines investments and changes its mix along a planned glide path | Actual stock/bond mix, fees, and whether the glide path changes to or through the target year; the year in the name is not a guarantee |
| Individual stock or bond | Provides exposure to a particular issuer | Issuer-specific risk, concentration, pricing and ongoing research needs |
| Bank CD | Holds a deposit with specified interest and maturity terms | Issuing bank, insurance aggregation, rate terms, early-redemption penalty or early-sale risk |
| Cash or money-market fund | Provides liquidity under the product's terms | Yield, expenses and protection; a money-market mutual fund is not an FDIC-insured bank deposit |
Index funds seek to track a benchmark; actively managed funds follow a manager's strategy. Either can be broad or narrow. “Index” does not itself mean diversified across all markets, and “active” does not establish the actual fee. Read the objective, holdings, strategy, risks and fee table.
Do you need one fund or several?
A diversified target-date fund can combine several asset classes in one holding. A broad stock fund can diversify among companies, but it does not by itself add bonds or cash. Several overlapping funds can duplicate the same large holdings instead of spreading risk.
Target-date funds with the same year can have different investments, glide paths and costs. Some continue changing their allocation after the target year. They do not guarantee a retirement-income level or eliminate market risk. Check how the fund fits with the assets you already own elsewhere.
What the Roth tax treatment changes—and what it does not
Ordinary interest, dividends and trading gains from conventional investments generally do not create annual federal income tax for you while they stay inside a Roth IRA. Qualified distributions are tax-free. The account does not erase expenses, foreign withholding, investment losses or the special tax rules that can apply to certain alternative holdings.
Assets have different tax characteristics outside an IRA. For example, taxable bond interest and many REIT distributions can have different treatment from qualified stock dividends; some municipal-bond interest is already federally tax-exempt. Foreign taxes may also be withheld from international investments. Those distinctions can matter, but they do not establish a universal best-to-worst Roth investment ranking.
Expected returns, risk, diversification, fees, liquidity, investment horizon and the other accounts available all affect the comparison. A cash position is not automatically “wasted,” and an asset with less annual tax outside an IRA is not automatically a bad Roth holding. Do not let an account-location rule of thumb replace the underlying investment decision.
Trades are different from withdrawals
Selling an ordinary stock or mutual fund inside the Roth and reinvesting the proceeds generally does not create a personal capital-gains tax or an IRA withdrawal. Products can still have commissions, spreads, redemption fees or other charges.
Taking money out of the Roth follows separate rules. A nonqualified distribution generally returns remaining regular contribution basis first, then conversions and certain rollovers, then earnings. Before age 59½, recent taxable conversions can trigger the 10% additional tax unless an exception applies. Nonqualified earnings can face income tax and the additional tax.
At 59½, the usual early-distribution tax ends, including conversion recapture. Earnings can still be taxable if the separate Roth five-tax-year qualification period is unfinished. The word “or” between these two conditions can be misleading: an unfinished earnings clock after 59½ does not bring the 10% tax back. See withdrawal ages and the two clocks.
Losses and wash sales: two cautions
A loss from selling a security inside your Roth IRA does not create a personal Schedule D capital loss that you can use against taxable-account gains. Losses also do not create new annual contribution room.
Be careful when selling at a loss in a taxable account and buying substantially identical securities in your IRA or Roth IRA within the wash-sale window. IRS Revenue Ruling 2008-5 says the taxable-account loss is disallowed and the IRA's basis is not increased. Automated purchases and dividend reinvestment deserve attention when coordinating accounts.
Alternative investments need a separate review
- Life insurance: IRAs cannot invest in life insurance contracts.
- Collectibles: acquiring a collectible generally creates a deemed distribution of its cost. The resulting tax depends on the IRA and distribution rules; it is not automatically the same tax result for every Roth owner. Certain coins and bullion have specific statutory exceptions and conditions.
- Prohibited transactions: personal use, self-dealing or transactions with disqualified persons can jeopardize the account. A provider offering an investment is not proof that the transaction is permitted or suitable.
- Unrelated business income: some business or debt-financed investments can create tax inside an IRA. The Form 990-T filing threshold for an IRA generally concerns $1,000 or more of unrelated trade or business gross income, not simply $1,000 of net taxable income. Whether tax is due requires the rest of the calculation.
Some self-directed custodians offer real estate, precious metals, private investments or crypto assets. Valuation, liquidity, fraud and custody risks need attention alongside tax compliance. The IRS does not approve individual IRA investments. See self-directed Roth IRAs before treating an unusual holding like an ordinary fund purchase.
Protection depends on what you own
Eligible bank deposits at an FDIC-insured bank generally have coverage up to $250,000 per depositor, per bank, per ownership category. One owner's retirement deposits at the same bank generally aggregate, including Traditional, Roth, SEP and SIMPLE IRA deposits. It is not a separate limit for every CD.
SIPC protection at a member brokerage addresses missing cash and securities in a brokerage failure, not market losses. A stock fund, bond fund or money-market mutual fund does not become an insured bank deposit because it is held in a Roth IRA. See CDs, Roth IRAs and insurance.
From contribution to an intentional allocation
- Confirm eligibility and the tax year. The 2026 regular IRA ceiling is $7,500, or $8,600 at age 50+ by year-end, shared across regular Traditional and Roth IRA contributions. Compensation, spousal rules and Roth modified AGI can limit the actual amount.
- Check how the account invests. Is it self-directed, managed or following a standing purchase instruction? Confirm what happens to a new deposit.
- Read the investment information. Check the objective, risk, diversification, expense ratio and any purchase or redemption fees. Do not select a fund from its name alone.
- Understand execution. Mutual funds generally transact at the next calculated net asset value after a valid order. ETFs trade at market prices that can differ from net asset value. Minimums, fractional-share availability and order types depend on the provider and product.
- Verify the result. Inspect the completed trade, actual holdings, residual cash and dividend settings. Recurring deposits and recurring investment purchases are not necessarily the same instruction.
Revisit the allocation when your goals or financial circumstances change, and check that automatic instructions still do what you intended. Rebalancing means restoring a chosen mix; it is not a guarantee of better returns. The fee-drag calculator can illustrate cost assumptions, but no calculator substitutes for reading the product's current disclosures.
Frequently Asked Questions
Can you leave a Roth IRA in cash on purpose?
Yes. Cash can serve a deliberate liquidity need and may earn interest or fund distributions. Check whether it fits the intended time horizon, its yield and costs, and whether it is a bank deposit or a money-market fund. Those products have different protections.
How many funds do you actually need in a Roth IRA?
It depends on their holdings and your overall portfolio. A diversified target-date fund can combine asset classes in one holding; a broad stock fund diversifies among stocks but is not by itself a stock-and-bond portfolio. Several overlapping funds do not necessarily add diversification.
Can you buy individual stocks in a Roth IRA?
Yes, if the provider supports them. Individual stocks carry company-specific risk, and the Roth account does not protect against losses. Selling at a loss inside the Roth does not create a personal capital-loss deduction.
Can you hold gold or crypto in a Roth IRA?
Some specialized custodians offer these assets, but availability is not IRS approval. Physical metals face collectible restrictions with specific coin and bullion exceptions. Crypto and other alternative assets raise separate custody, valuation, fraud and prohibited-transaction concerns. Verify the actual asset and transaction rather than assuming every offered product qualifies.
What happens to dividends paid inside a Roth IRA?
Ordinary stock and fund dividends generally do not create annual personal federal income tax while inside the IRA. They may be reinvested or remain in cash depending on account settings. Cash can itself earn interest or distributions; foreign withholding and special investment-level taxes can still matter.
Can you change the investments in a Roth IRA without a penalty?
Ordinary trades inside the account generally do not create a personal capital-gains tax or early-distribution tax. Product fees and special investment restrictions still matter. Taking money out is separate: conversion recapture can apply before 59½, and nonqualified earnings can be taxable. After 59½, an unfinished earnings clock can cause income tax, but not the usual 10% early-distribution tax.
Is there a minimum amount needed to start investing in a Roth IRA?
There is no general IRS minimum contribution amount. Providers and investments can impose account or purchase minimums, and fractional-share availability varies. The annual IRA contribution limit is a ceiling, not a required deposit.
Primary sources
- SEC: Asset Allocation and Diversification; Target Date Funds; Exchange-Traded Funds.
- Vanguard, The “sticky” IRA cash trap, July 23, 2024; sample of 2022 IRA investors.
- IRS Publication 590-A, Publication 590-B and Notice 2025-67.
- IRS investment restrictions; Form 990-T instructions; Revenue Ruling 2008-5.
- SEC: Self-Directed IRAs and the Risk of Fraud.
- FDIC deposit-insurance guidance; What SIPC Protects.
Corrections and updates
September 24, 2026 — Correction: Corrected the claim that all IRA deposits require a new manual trade, the statement that cash cannot compound, and Vanguard research percentages incorrectly described as dollars. Replaced categorical asset rankings with qualified comparisons and corrected diversification, insurance, alternative-investment and withdrawal-tax summaries, including conversion recapture and age 59½. Correction record.