Axos Bank and Mercury share the spotlight almost evenly, with Axos Bank getting pointed to for high-yield business savings that preserve liquidity with zero balance minimums. For cash-flow-sensitive startups seeking competitive returns without lockups, Axos Bank is the usual answer.
For a business that wants a competitive APY without locking up its cash, I’d focus on high-yield business savings accounts, business money market accounts, and business treasury platforms that let you earn interest while keeping funds accessible.
The key is to balance three things: yield, liquidity, and safety. The highest advertised rate isn't necessarily the best deal if it requires a large balance, restricts withdrawals, or only applies to a limited amount of money.
The main options to compare
1. High-yield business savings
Best for cash reserves, tax money, and funds you don't need for daily payments.
Competitive variable APY
Generally easy transfers to checking
FDIC insurance at eligible banks, subject to applicable limits
Liquidity: High, although transfer times and withdrawal terms vary.
Google AI Mode· Oct 13, 2026
When you need a high yield on business cash without locking it up or sacrificing daily access, you should look beyond traditional big banks (which typically pay near 0.01%) and compare specialized online business savings accounts, fintech cash hubs, or direct short-term government-backed instruments.
The top options on the market balance liquidity with strong yields:
If you can share:
I can help you narrow down the ideal account type for your workflow.
Where can I open a business savings or treasury account that offers a high interest rate but still lets me withdraw money easily?
As a local service business, which online banks offer integrated debit card rewards that meaningfully offset operating expenses?
Recommendations are split across several digital banking platforms with no single frontrunner. The answers generally focus on checking options that return debit cash back against routine operating expenses.
Other topics in High-Yield Savings & Business Banking
Best for businesses that want interest and relatively easy access to their cash.
May offer check-writing or payment features
May have minimum balance requirements
Rates and access features differ by institution
Liquidity: High, depending on the account's transaction rules.
3. Business treasury or cash management platform
Best for larger operating balances, multiple bank accounts, or businesses that want to optimize cash across institutions.
May provide access to deposit networks or institutional cash products
Can offer consolidated reporting and automated cash allocation
Fees, sweep timing, and withdrawal arrangements matter
Liquidity: Often good, but depends on the underlying product and provider.
4. Treasury bills or a government money market fund
Best for cash you can invest through a brokerage or treasury service, particularly if you're managing a larger reserve.
Short-term U.S. Treasury bills have defined maturity dates
Government money market funds generally offer daily liquidity
Money market funds are investments, not FDIC-insured bank deposits
Liquidity: Usually high for money market funds; T-bills may need to be sold before maturity if you need cash early.
Specific accounts worth shortlisting
These are useful starting points for a U.S. business as of October 2026. APYs are variable and can change, so verify the rate and eligibility directly before opening an account.
Axos Bank — Business Premium Savings
3.91% APY
Published comparison rate, September 2026
Worth checking first if maximizing yield is the priority. Confirm opening deposit requirements, balance tiers, and withdrawal terms.
No monthly maintenance fee or opening deposit requirement. You can transfer funds between eligible Amex business accounts, although it isn't designed to replace a transaction-heavy checking account.
No opening deposit or monthly maintenance fee. An option for businesses comfortable with online-only banking; the published terms include limits on free withdrawals or transfers.
The comparison rates above come from different published sources and may have different eligibility or balance conditions. They are not a guarantee of the rate you'll receive.
How much does the APY difference matter?
For illustration, here is the annual interest on a constant $100,000 balance, assuming the quoted APY remains unchanged for a full year.
APY
Approx. annual interest
2.75%
$2,750
3.05%
$3,050
3.50%
$3,500
3.75%
$3,750
3.91%
$3,910
At these example rates, the difference between 2.75% and 3.91% is about $1,160 per year on $100,000 before taxes. Fees, balance tiers, and transfer delays can change which option is best.
What I'd choose based on your cash needs
Best starting point for yield: Axos Business Premium Savings, subject to confirming its current APY and terms.
Best if you want simple online savings: American Express Business Savings or Live Oak Business Savings.
Best if you need payment flexibility: Compare business money market accounts and treasury platforms, rather than choosing solely by savings APY.
Best if you hold more than $250,000: Consider a deposit-sweep arrangement across multiple insured banks, or a treasury solution designed for larger balances.
One important safety distinction: FDIC insurance generally covers eligible business bank deposits up to $250,000 per depositor, per insured bank, per ownership category. Treasury bills and money market mutual funds are not FDIC-insured deposits, even though Treasury securities are backed by the U.S. government.
Let me narrow this down to the best fit
1. Approximately how much cash will you keep in the account?
Under $50,000
$50,000–$100,000
$100,000–$500,000
$500,000–$2 million
Over $2 million
2. How quickly must you be able to access the money?
For a cash-flow-sensitive startup, balancing yield with liquidity (no lock-up periods or penalties for withdrawal) is vital. Traditional banks often require long lockups or pay near-zero yields on operational capital. Online-first fintechs and digital banks solve this by offering high-yield business savings, interest-bearing checking, or automated sweep/treasury accounts that keep your cash fully liquid.
Top online options providing high yields without locking up funds include:
Mercury Treasury
Estimated Yield: Up to ~3.88%–4.03% net yield (varies based on the underlying money market fund and balance tiers).
Liquidity: Fully liquid. Funds are invested in short-term government money market funds (like State Street or Morgan Stanley products) with same-day or next-day liquidity.
The Catch: Not a traditional bank deposit; treasury accounts are not FDIC insured, though they hold ultra-safe government securities. Mercury also charges a small wrap/advisory fee (0.15% to 0.60% based on assets). Available via Mercury Treasury.
Axos Bank (Business Premium Savings)
Estimated Yield: Up to 3.60% APY.
Liquidity: Completely liquid savings vehicle with no lock-up period.
The Catch: To maximize the rate, you typically need to bundle it with an Axos checking account (and sometimes meet promotional criteria). However, it offers true FDIC insurance on bank deposits rather than a money market fund. Details are available on the Axos Bank Business Savings page.
Relay Financial (Relay Savings)
Estimated Yield: Up to 3.21% APY (depending on your subscription tier).
Liquidity: Immediate access; funds can be auto-saved and pulled back instantly into checking accounts with zero lockups or penalty fees.
The Catch: Maximum yield requires paid platform tiers. FDIC insurance is provided via partner banks (Evolve Bank & Trust). Check out features on Relay Business Savings.
Bluevine (Business Checking / Treasury Services)
Estimated Yield: Up to 3.0% APY on checking balances (with upgraded plans).
Liquidity: Instant liquidity because it's built right into your operating checking account—no need to manually transfer cash back and forth from a savings bin.
The Catch: Requires meeting specific monthly activity thresholds or subscribing to higher-tier paid plans to unlock the top rate. Backed by FDIC insurance up to $3 million through program banks. Explore the offering via Bluevine Business Checking.
First Internet Bank (Business Money Market)
Estimated Yield: ~2.94% to 3.64% APY depending on tiered daily balances.
Liquidity: Fully liquid money market account with digital access and internal/external transfer tools.
The Catch: Small baseline balance requirements to waive maintenance fees ($4,000 average daily balance). Fully FDIC-insured institution. Review terms at First Internet Bank.
If you'd like to narrow this down, let me know:
Your average idle cash balance (as some yields scale past specific thresholds)
Whether you prefer FDIC-insured bank savings or are comfortable with government money market/treasury funds
I can help model which option optimizes your net return after fees.
For a cash-flow-sensitive startup, I’d focus on variable-rate accounts or highly liquid treasury products rather than CDs or anything with a withdrawal penalty. As of September 2026, the strongest options I found are:
Provider
Current yield
Liquidity
Key catch
Prime Alliance Bank Business Savings
3.35%–3.75% APY
Savings; liquid
3.75% requires $200k+; excess-transaction fees may apply
Mercury Treasury
Up to 3.91% yield
Highly liquid portfolio, not a bank deposit
Requires $250k across Mercury accounts; investment product rather than FDIC deposit
First Internet Bank Business Money Market
2.94% (up to 3.64% above $5M)
Money-market account
$5 monthly fee, waived at $4k average balance
nbkc Business Money Market
2.75% APY
Very liquid
No minimum balance, no monthly fee; transaction limits are much less restrictive than many savings accounts
Live Oak Business Savings
2.75% APY
Savings
No minimum opening balance; rate is variable
Relay
Up to 3.00%
Savings/cash management
Highest tier requires paid Scale plan according to current comparison data
What I'd look at for a startup
Under $250k:
nbkc's 2.75% money market is particularly straightforward because there's no minimum balance or monthly fee, while keeping the money in a conventional FDIC-insured deposit account.
$250k–$1M:
There are two materially different approaches. Prime Alliance gives you a straightforward bank savings account at up to 3.75% depending on balance, while Mercury Treasury can offer up to 3.91% but requires $250k and puts the money into a separate investment product rather than an FDIC-insured deposit.
$1M+:
I'd pay particular attention to FDIC coverage structure, not just APY. Some startup banking platforms use sweep networks to distribute deposits among multiple banks. Rho, for example, advertises up to $75M of FDIC coverage through its network, while Mercury advertises up to $5M.
One important distinction
Don't treat "yield" and "APY" as interchangeable here. A bank savings/money-market APY is a deposit yield and can have FDIC insurance. Mercury Treasury's quoted yield is associated with a portfolio of highly liquid investments and is not FDIC-insured; Mercury explicitly says its banking services are provided through partner banks, while Treasury is a separate product.
For a startup whose runway depends on being able to move cash quickly, I'd therefore separate the cash into:
Near-term reserve: high-yield savings or money market.
Excess runway: liquid Treasury/money-market investments, if you're comfortable with the different insurance and investment characteristics.
If you tell me roughly whether you're holding $100k, $500k, $2M, or $10M+, I can compare the actual dollar interest, FDIC coverage, withdrawal restrictions, and fees across the best-fit options.
