6 Best Investment Accounts for Handling Uninvested Cash

Since 2010, when it was founded by Eli Broverman and Jon Stein, Betterment has evolved from a simple automated investing platform to where it now offers an excellent selection of automated portfolios—all of which are ETF-based, including its cryptocurrency offering—checking accounts, and more, all with an exceptional user journey. Betterment now serves more than 1,000,000 customers, making it one of the largest standalone robo-advisors.

Betterment also offers a compelling high-yield cash account, which pays 3.75% APY through its partner banks as of September 2025. The rate applies to all balances, with no minimum requirement, and is covered by Federal Deposit Insurance Corp. (FDIC) insurance up to $4 million for joint accounts. Plus, when you're a new Betterment customer, you also receive an even higher bonus APY of up to 0.65% through January 15, 2026, with a qualifying deposit (terms apply). Once you’re ready to invest, you can easily transfer funds into your investment portfolio or use their no-fee checking account for daily expenses. The account also comes with zero account fees and requires no minimum or maximum balance to earn 3.75% APY.

Annual percentage yield (variable) is 3.75% as of 9/23/25, plus a 0.65% boost (“APY Boost”) for new clients with a qualifying deposit. $10 min deposit for base APY. Terms apply; if the base APY changes, the Boosted APY will change. Cash Reserve offered by Betterment LLC and requires a Betterment Securities brokerage account. Betterment is not a bank. Learn More.

FDIC insurance provided by Program Banks, subject to certain conditions.

The reported customer count of 1M is as of 8/19/2025, and is inclusive of checking and investing clients.

Founded in 2017 and headquartered in New York City, Webull markets itself as a discount broker. However, the platform is really quite capable, packing in advanced trading tools and support for a wide range of tradable assets that includes options, futures, fractional shares, and over-the-counter (OTC) stocks. Self-directed traders also value the platform’s real-time data, commission-free trading, excellent mobile trading capabilities, extended-hours trading, and a user-friendly experience. Where Webull misses, however, is in its lack of fixed income and mutual fund investments, limited range of portfolio management tools, and potentially compromised execution quality that often results from the use of payment for order flow (PFOF).

Webull’s cash management account also adds serious value for Premium members looking to earn a high rate of interest on uninvested cash. With a highly competitive APY of 3.85%, Webull’s Premium account customers pay $3.99 per month to earn among the industry’s best interest rates that accrue daily and are deposited to your account monthly, making it a smart option for cash that would otherwise sit idle. Regular brokerage account holders earn 3.50% APY if their net account value exceeds $25,000, and 0.50% APY below that threshold. For all levels, there are no account fees or balance minimums, and the cash remains instantly accessible for trading or withdrawals.

Since Dan Carroll and Andy Rachleff founded Wealthfront in 2008, the company has developed into one of the most technologically-advanced digital wealth management platforms—now serving over a million users. What started with simple portfolios has expanded to include hundreds of ETFs, automated bond options, and portfolios built around ESG goals or traditional strategies. Users get access to 17 different asset classes, and the whole process is built to match your goals, risk tolerance, and timeline. Want to tweak things? You can explore more aggressive or conservative mixes and rebalance your portfolio whenever you need to.

While Wealthfront is an industry leader in portfolio construction, goal planning, and portfolio management, the company’s Cash Account is also a powerful offering. As of September 2025, it pays a standout 3.75% APY—or 4.40% if you refer a friend. There are no fees, no balance requirements, and your cash enjoys up to $8 million in FDIC insurance through partner banks. With zero-commission stock trades, a linked debit card, and automated tax-loss harvesting, Wealthfront makes modern wealth management both easy and efficient.

Robinhood disrupted the online brokerage industry back in 2013 with its offer of zero-commission trades and a super simple app-based trading experience. The competition quickly evolved to meet this challenge, however, so Robinhood has been forced to adapt in ways that keep pace with the resources of industry giants like Fidelity and Charles Schwab. The result has been the addition of retirement tools, more educational content, and improved features for active traders. In October 2024, they launched Robinhood Legend, a much-needed improved trading platform with more advanced trading tools. Then, at its second annual Gold keynote event in March of this year, the company introduced Robinhood Strategies, which is designed to deliver tailored, expert-managed portfolios directly in the Robinhood app. Robinhood also used this opportunity to announce a new banking product and AI investing tools that are scheduled to be rolled out later this year. 

As far as cash management is concerned, Robinhood’s premium Gold cash account is a solid option if you want your uninvested cash to earn while you wait. Currently paying 3.75%, Robinhood’s Gold comes with premium features like Morningstar research, a larger limit for instant deposits, and lower rates for margin investing. It’s important to note, however, that the Gold account comes at a cost of $5 per month. Plus, to earn this impressive rate of interest, you must opt in to use cash sweep on the app. There’s no minimum or maximum balance requirement to earn interest.

Moomoo is a subsidiary of Futu Holdings Limited (FUTU), which is a publicly traded company listed on the Nasdaq. Moomoo itself is not listed. Headquartered in Palo Alto, California, moomoo was founded in 2018 to provide everyday traders a professional-level trading platform, along with strong analytical tools. Designed for tech-savvy investors, moomoo offers commission-free trading;, powerful research tools; and a capable, intuitive interface that’s packed with real-time data and advanced charting features. Its platform bridges the gap between beginner investors and active traders by combining educational content with professional-grade analytics—all in one place.

Moomoo’s cash management account is a highlight of the platform, for its ultra-competitive APY of 3.85%, which is one of the highest among brokerage platforms.  Interest is accrued daily and deposited monthly, allowing users to earn on uninvested cash without locking it up or meeting minimum balance requirements. There are no maintenance fees, and funds remain liquid, meaning they can be quickly deployed when market opportunities arise. What really sets moomoo apart is how seamlessly its cash management integrates with the trading platform, allowing users to move between earning and investing without friction. Whether you're waiting for the next market dip or just want your cash to do more in the meantime, moomoo makes your idle funds work harder—all while keeping them easily accessible.

Founded in 2019 and based in New York City, Public.com is a relative newcomer to the online broker space. The platform focuses on the essentials without overwhelming you with extra bells and whistles. Serious traders can get more features and service via Public Premium, for $8 per month if billed annually ($10/month when billed monthly) and free for accounts of least $50,000. Public Premium gives users access to advanced crypto data, allows users to take a deeper look at company data and earnings reports, and provides a dedicated support team for placing trades, making transfers, and more.

The platform supports investing in popular assets like stocks, ETFs, options, and crypto. While part of its early growth was due to the availability of alternative investments, the company stopped offering access to often hard-to-find investments like artwork, rare sneakers, and trading cards in November 2024. In addition, popular products like mutual funds and futures aren’t available.

Public’s High-Yield Cash Account is a compelling option for anyone looking to earn more on uninvested cash. With no monthly maintenance fees and highly competitive earnings power of 3.80% on cash accounts, Public’s cash offering is FDIC-insured up to $5 million through partner banks and comes with no fees or minimums. Funds are always accessible and can be moved into investments at any time. For users who want their idle cash to work harder while staying ready to deploy, Public’s combination of high yield, flexibility, and safety makes it a top-tier pick.