Have you ever checked your brokerage account and noticed a chunk of cash just sitting there, doing nothing? I have, and it always feels like a missed opportunity. In 2025, with interest rates at some of the highest levels in years, letting your uninvested cash idle is like leaving money on the table. The good news? There are investment accounts designed to make your cash work harder, offering competitive yields without locking up your funds. Let’s dive into the six best platforms that can help you earn at least 4.00% on your idle cash, all while keeping things flexible and accessible.
Why Your Cash Deserves Better
Uninvested cash in your brokerage account might seem harmless, but it’s not earning its keep. Whether it’s money waiting for the next market dip or funds you haven’t allocated yet, idle cash can generate meaningful returns with the right account. I’ve always believed that every dollar should have a job, and in today’s market, high-yield cash accounts are the perfect employees. These accounts offer impressive annual percentage yields (APYs), often surpassing traditional savings accounts, and they come with the flexibility to move your money when opportunity knocks.
Your cash should never sit idle—it’s an asset that can generate returns with minimal effort.
– Financial advisor
So, how do you choose the right platform? I looked at dozens of options and narrowed it down to six that stand out for their high APYs, low fees, and user-friendly features. Each offers at least 4.00% APY as of April 2025, with no hidden catches. Let’s break them down.
1. Betterment: Automated Wealth, High-Yield Cash
Betterment has been a game-changer since it burst onto the scene in 2010. It’s not just a robo-advisor anymore—it’s a full-fledged platform for building wealth with minimal effort. Their cash reserve account is a standout, offering a solid 4.00% APY with no minimum balance or monthly fees. What I love about Betterment is how seamless it feels—you can park your cash, earn a competitive return, and transfer it to their ETF-based portfolios when you’re ready to invest.
Plus, there’s a sweet perk: refer a friend, and you could boost your APY to 4.50% for three months. With FDIC insurance up to $4 million for joint accounts, your money is safe, and the platform’s intuitive design makes managing it a breeze. However, if you’re into picking individual stocks or using advanced trading tools, Betterment might feel a bit limiting.
- No fees or minimums to earn 4.00% APY
- FDIC insurance up to $4 million
- Referral bonus boosts APY temporarily
- Limited to ETF-based portfolios
2. Webull Premium: Trading Powerhouse With Cash Perks
Webull is a favorite among active traders, and for good reason. Launched in 2017, it packs professional-grade tools into a user-friendly package. Their cash management account for Premium members delivers a stellar 4.10% APY, which is among the highest out there. The catch? You’ll need to shell out $3.99 a month for the Premium membership to unlock this rate. For regular accounts, the APY drops to 3.75% (or 0.50% for balances under $25,000).
I’ve always appreciated Webull’s commission-free trading and extended-hours access, which make it a great fit for those who like to stay active in the markets. The downside? Their reliance on payment for order flow might mean slightly less optimal trade executions. Still, for cash management, Webull’s high yield and daily interest accrual make it a strong contender.
A high-yield cash account is like a savings account on steroids—your money grows without being locked away.
Here’s a quick look at Webull’s cash account features:
| Feature | Details |
| APY | 4.10% (Premium members) |
| Monthly Fee | $3.99 (Premium) |
| Minimum Balance | $0 |
| FDIC Insurance | Yes, through partner banks |
3. Wealthfront: High Yields, Smart Planning
Wealthfront is a pioneer in digital wealth management, and their cash account is a gem. Offering 4.00% APY (or 4.50% with a friend referral), it’s a no-fee, no-minimum account with FDIC insurance up to $8 million. What sets Wealthfront apart is its holistic approach—your cash account integrates seamlessly with their robo-advisor portfolios, which include everything from ESG-focused investments to automated bond ladders.
I find Wealthfront’s clean interface and built-in financial planning tools incredibly helpful, especially for long-term goals. That said, if you’re looking for human advisors or complex trading options, you might need to look elsewhere. For most people, though, Wealthfront’s blend of high yields and smart automation is tough to beat.
- Earn 4.00% APY, no fees or minimums
- Boost to 4.50% with referrals
- FDIC insurance up to $8 million
- Limited flexibility outside robo-advisor portfolios
4. Robinhood Gold: Simple Cash, Premium Perks
Robinhood shook up the brokerage world with its zero-commission trades, and its Gold cash account is a solid option for those willing to pay $5 a month. At 4.00% APY, it’s competitive, but you’ll need to opt into their cash sweep program to earn it. I’ve always found Robinhood’s app refreshingly simple, which is great for beginners, but its research tools and asset selection lag behind bigger players like Fidelity.
Robinhood’s recent upgrades, like advanced trading platforms and AI-driven tools, show they’re trying to keep up with the giants. For cash management, the Gold account’s perks—like Morningstar research and lower margin rates—make it worth considering, especially if you’re already a fan of their ecosystem.
Here’s why Robinhood Gold might work for you:
- 4.00% APY for Gold members
- No minimum balance required
- $5 monthly fee for Gold perks
- Limited research and asset options
5. Moomoo: High Yields for Tech-Savvy Traders
Moomoo, a newer player from Futu Holdings, is designed for traders who want professional tools without the hefty price tag. Their cash management account offers an impressive 4.10% APY with no fees or premium membership required. I’m a big fan of how Moomoo blends real-time data, advanced charting, and commission-free trading into a single platform—it’s like having a Wall Street setup in your pocket.
The catch? Moomoo’s account types and investment options are somewhat limited, and their wire transfer fees can sting. Still, for uninvested cash, the high APY and seamless integration with trading make it a top pick for active investors.
The best cash accounts combine high yields with instant access, so you’re never caught off guard by market moves.
– Investment strategist
6. Public: Simple, High-Yield, No Frills
Public.com is the new kid on the block, launched in 2019 with a focus on simplicity. Their High-Yield Cash Account delivers 4.10% APY with no fees, no minimums, and FDIC insurance up to $5 million. I like that Public avoids payment for order flow on stock and ETF trades, which can lead to better execution prices. It’s a straightforward platform, perfect for those who want to invest in stocks, ETFs, or crypto without the clutter.
Public’s Premium plan ($8/month) adds advanced data and support, but you don’t need it to access the high-yield cash account. If you’re looking for mutual funds or futures, though, you’ll need to go elsewhere. For idle cash, Public’s combination of yield, safety, and flexibility is hard to top.
Key features of Public’s cash account:
| Feature | Details |
| APY | 4.10% |
| Monthly Fee | $0 |
| Minimum Balance | $0 |
| FDIC Insurance | Up to $5 million |
How to Choose the Right Account for You
With so many great options, picking the best account for your uninvested cash comes down to your goals and habits. Are you an active trader who needs real-time data and advanced tools? Webull or Moomoo might be your best bet. Prefer a hands-off approach with automated portfolios? Betterment or Wealthfront could be the way to go. If simplicity and low costs are your priority, Public or Robinhood Gold might fit the bill.
Here’s a quick checklist to guide your decision:
- APY: Aim for at least 4.00% to maximize returns.
- Fees: Avoid accounts with high monthly costs unless the perks justify it.
- Access: Ensure your cash stays liquid for trading or withdrawals.
- Insurance: Look for FDIC coverage through partner banks.
- Platform Fit: Choose a platform that aligns with your investing style.
In my experience, the best choice often balances high yields with a platform you’re already comfortable using. Switching between apps can be a hassle, so sticking with one ecosystem—like Wealthfront for long-term planners or Webull for traders—makes life easier.
Why Cash Management Matters in 2025
Let’s be real: 2025 is shaping up to be a wild year for markets. Interest rates are high, inflation’s still a factor, and opportunities to invest are popping up left and right. Keeping your cash in a low-yield account—or worse, a non-interest-bearing one—is like letting it gather dust. A high-yield cash account ensures your money grows while you wait for the right moment to pounce on a stock, ETF, or crypto deal.
In volatile markets, cash is king—but only if it’s earning its keep.
Perhaps the most exciting part? These accounts don’t just offer high yields—they’re built for flexibility. You can move your money into investments instantly, whether it’s a market dip or a new IPO. And with FDIC insurance, you’re covered even if the unexpected happens.
Final Thoughts: Make Your Cash Work
I’ve always believed that financial success comes from making every dollar count. These six investment accounts—Betterment, Webull, Wealthfront, Robinhood Gold, Moomoo, and Public—offer some of the best ways to turn idle cash into a productive asset. With APYs of 4.00% or higher, no or low fees, and FDIC insurance, they’re designed to help you grow your wealth without tying up your funds.
So, what’s the next step? Take a look at your brokerage account. If you’ve got cash sitting there, it’s time to put it to work. Pick a platform that fits your style, and start earning today. Your future self will thank you.
Cash Management Formula: High APY + Low Fees + Flexibility = Wealth Growth
