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Maximize your money and your liquidity.

Earn up to 3.91% yield with lower-risk portfolios and same-day access to your money. Exclusively for Mercury account holders.
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Mercury Treasury accounts are offered by Mercury Advisory LLC, an SEC-registered investment adviser.

Strategic cash management
made simple

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Effortlessly earn up to 3.91%

Qualify for Mercury Treasury with a minimum balance of $250K across your Mercury accounts.

Access your capital any time

Get the flexibility you need with withdrawals as soon as same day.

Automate your cash management

Set custom auto-transfers between your operating and investment accounts.

Secure your runway

Your money is invested in lower-risk mutual funds held in your name.

Growth for the long term, flexibility in the short term

Customize your portfolio across top-tier funds only available through Mercury

Put your cash management strategy on cruise control with automated transfers

Mercury has made the process of transferring funds between a high-yield Treasury account and a checking account remarkably seamless, ensuring we make the most of every dollar.

Amaro Luna

Co-founder, Telegraph

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Unlock high yields without locking up your money

Unlike other high-yield investments, your money is always within reach with Mercury Treasury. You can easily transfer funds to your checking account as soon as same day.

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Earn up to 3.91% yield.
No surprise fees.

Yield (net of fees) up to:
Total Mercury Deposits
Government Money Market (MRGXX)
Same-day liquidity
Ultra-Short Term Bonds (MCRYX)
1-2 day liquidity
> $50M
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$20–$50M
3.65%
3.91%
$10–$20M
3.55%
3.81%
$5–$10M
3.45%
3.71%
$2–$5M
3.35%
3.61%
$250K–$2M
3.20%
3.46%

Upgrade to personalized portfolios for a premium experience

Invest on a whole new level with Mercury Treasury Solutions by Morgan Stanley

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  • Qualify with a $25M balance across Mercury accounts

  • Maximize yield through a wide range of short-term securities

  • Get dedicated, white-glove service from Morgan Stanley’s experienced portfolio management team

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Access an entire financial platform powered by your Mercury account

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Checking and savings accounts

Secure up to $5M in FDIC insurance through our partner banks and their sweep networks.

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Confidently scale your team with the IO Mastercard. Earn 1.5% cashback with startup-friendly credit limits.

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Venture debt

Fuel your growth with startup-friendly venture debt.

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Financial workflows

Pay bills, control spend, and close your books quicker with banking and software in one place.

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Startup perks

Get discounts on hundreds of popular tools, including AWS and Google Cloud.

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SAFEs

Easily create and manage SAFEs right inside Mercury, plus potentially save money on legal fees.

FAQs

Today, most businesses are eligible for Mercury Treasury if they meet three requirements:
  1. They are a U.S. entity
  2. They are physically located in one of the following countries: United States, United Kingdom, Canada, India, Singapore, Israel, Netherlands, Spain, Germany, Denmark, Australia, or Mexico
  3. They meet the minimum balance requirement of $250,000 across all Mercury accounts
Unfortunately, we cannot support businesses that meet any of the following criteria at this time:
  • LLCs taxed as sole proprietorships
  • Nonprofits or other 501(c)(3) organizations
  • Foreign financial institutions
  • Banks organized under foreign laws and located outside of the United States
  • Legal entity customers who are exempt from identifying and verifying beneficial owners
  • Certain registered and exempt investment advisers
  • Securities brokers or dealers
  • Businesses with a beneficial owner that has a home address in certain restricted countries
We are working hard to make Mercury Treasury available to more businesses, so please check back regularly for the latest eligibility criteria. 

  • There are no fees to open an account or transact with Mercury Treasury. 
  • Users are charged a small percentage of their total monthly Mercury Treasury positions at a rate determined by the total deposits held across all your Mercury accounts, ranging from 0.15% to 0.6%. 
  • Yield and fee caps are represented as annualized numbers. Mercury Treasury, by Mercury Advisory, LLC, an SEC-registered investment adviser, seeks to earn net returns up to 3.91% annually on your idle cash for Mercury deposit sizes over $20M. Net yield numbers as of 09/18/2026.
  • Mercury Treasury Solutions with Morgan Stanley has a separate fee structure. Please contact us to learn more about Mercury Treasury Solutions and associated fees. 
  • Please see important terms and conditions at the bottom of this page.

Yes, you can withdraw money from your Mercury Treasury account at any time — the time it takes to transfer out will vary depending on which fund the money is invested in. Money invested in the State Street Institutional U.S. Government Money Market Fund is available the same day if the transfer is initiated by 3pm ET, subject to partner processing times. Money invested in the Morgan Stanley Ultra-Short Strategy PortfolioOpens in new tab will be available as soon as 1-2 business days later, but it can take up to 4 business days.

Your Mercury Treasury account is held in your name at our partner, Apex Clearing Corp, a FINRA-regulated broker-dealer that has been in business for over 40 years. This means that every time a customer signs up for Mercury Treasury, we open an account in their name at Apex, which holds their funds in custody. A few other things to note about Apex:
  • It maintains a detailed record of each Treasury customer’s holdings and is prohibited from using any of these funds or securities for its own purposes — or from commingling them with its own customers’ holdings.
  • It is regulated by the SEC and FINRA.
  • It is regularly audited and must publish its financial statements to the public.
  • It is required to keep excess capital on hand to ensure customer deposits are protected.
We’ve worked with experienced regulatory counsel to set this up. Regardless of what happens to Mercury, any funds and securities held at Apex will remain safe and accessible.

Funds invested via Mercury Treasury are protected in several ways:
  • Your Mercury Treasury account is held in your name with our partner, Apex Clearing Corp. Apex Clearing Corp maintains a detailed record of each Treasury customer’s holdings and is prohibited from using any of these funds or securities for its own purposes, and from commingling them with its own customers’ holdings. Because assets are held in your name, they remain available to be transferred to an account at another broker in any of the following events:
    • Mercury bankruptcy, financial instability, sale or acquisition
    • Apex bankruptcy, financial instability, sale or acquisition
  • Apex is regulated by the SEC and FINRA, and is regularly audited and must publish financial statements to the public. Apex is also required to keep excess capital on hand to ensure customer deposits are protected.
  • Mercury Treasury offers two mutual funds that invest in lower-risk, short-term debt securities, such as Treasury bills, municipal debt, or corporate bonds. See the fund prospectuses for details on each fund’s holdings:
  • Mercury Treasury accounts are covered by the Securities Investor Protection Corporation (SIPC) insurance. This applies in the event that assets are lost or missing from a customer’s accounts during the time a financially-troubled or failed brokerage firm is being unwound. SIPC protects $500,000 worth of securities and cash, with maximum protection for cash of $250,000 and $250,000 in investments.

Mercury Treasury investments are held at Apex Clearing Corp, which is insured by the Securities Investor Protection Corporation (SIPC). In the unlikely event that Apex becomes insolvent, SIPC will insure customers up to $500K in securities and cash.

Mercury Treasury is currently available to users with account balances over $250,000 across all Mercury accounts. We hope to open Mercury Treasury to all users in the future.

Mercury Treasury Solutions with Morgan Stanley is currently available to Mercury account holders that have account balances exceeding $25M. Reach out to rm@mercury.com or contact your personal relationship manager for more details.

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Disclaimers and footnotes

Mercury is a fintech company, not an FDIC-insured bank. Banking services provided through Choice Financial Group and Column N.A., Members FDIC. Deposit insurance covers the failure of an insured bank.

  1. Mercury Treasury earns up to 3.91% yield annually, based on the 30-day Effective Yield for MCRYX as of 09/18/2026, and assumes total Mercury deposits of $20M+. Treasury accounts carry an annual fee of 0.15%–0.60% based on total Mercury balances.

    The 30-Day Effective Yield is an annualized net yield assuming dividends are reinvested at the average 30-Day rate for a full year. The 30-Day Effective Yield differs from the 30-Day SEC yield. The 30-Day Effective Yield for MCRYX is net of fees and reflects fee waivers from Morgan Stanley Investment Management. Fee waivers may be reduced or discontinued. Absent fee waivers, yields would have been lower. MCRYX has a floating NAV, is not a money market fund, and carries principal risk. Yields fluctuate, can decline, and are not guaranteed. Past performance is not indicative of future results. 

    Mercury Treasury is offered by Mercury Advisory, LLC, an SEC-registered investment adviser ("Mercury Advisory"). This communication does not constitute an offer to sell or the solicitation of an offer to buy any security. All Brokerage and Clearing services are provided by, and securities are offered through Apex Clearing Corporation, a wholly owned subsidiary of Apex Fintech Solutions Inc., an SEC registered broker dealer, member of FINRA and SIPC, licensed in 53 states and territories. FINRA BrokerCheck reports for Apex Clearing Corporation are available at: http://www.finra.org/brokercheck. Treasury accounts are not FDIC insured, are not bank deposits, and are not guaranteed by Choice Financial Group or Column N.A., and may lose value. Please review Mercury Advisory's ADV Wrap Fee Brochure and full disclosures for more detail. Mercury Advisory is a wholly-owned subsidiary of Mercury Technologies, Inc.

  2. Only applies to funds invested in the State Street Institutional U.S. Government Money Market Fund. Cutoff for transfers to settle same-day is 3pm ET each business day, subject to partner processing times. Read fund prospectus for additional information.

  3. The provider of this testimonial was a client of Mercury Advisory, LLCOpens in new tab at the time it was received, did not receive compensation, and was not aware of any conflict of interest.

  4. MRGXX net yield figure is representative of the 7-day Effective SEC Yield as of 09/21/2026, and assumes dividends are reinvested at the average 7-day rate for a full year and reflects a provisional fee waiver from State Street Investment Management that is scheduled to decrease over time, which would increase expenses and reduce yield. MRGXX is a government money market fund. You could lose money by investing in the fund, and it cannot guarantee its $1.00 share price. Yields fluctuate, are not guaranteed, and may decline as interest rates change or as the fee waiver phases out. Past performance is not indicative of future results. MCRYX net yield figure is representative of the 30-day Effective Yield as of 09/18/2026.

  5. Mercury Treasury Solutions is provided by Mercury Advisory, LLC for entity clients with $25M+ balances. Portfolios are advised by Morgan Stanley. Mercury Advisory does not directly manage assets, but receives a referral fee. Please review all website information and fund prospectuses before investing.

  6. Mercury is a fintech company, not an FDIC-insured bank. Banking services provided through Choice Financial Group and Column N.A., Members FDIC. FDIC deposit insurance covers the failure of an insured bank. Deposits in checking and savings accounts are FDIC-insured through Choice Financial Group and Column N.A. and their Sweep Program Network Banks. Certain conditions must be satisfied for pass-through FDIC insurance to apply. Learn more here.

  7. The IO Card is issued by Patriot Bank, N.A., Member FDIC, pursuant to a license from Mastercard International Incorporated.

  8. The IO Card is issued by Patriot Bank, N.A., Member FDIC, pursuant to a license from Mastercard International Incorporated. Eligible customers can access the IO card on day one of opening a Mercury account, limitations applyOpens in new tab.  Cashback is automatically credited to your linked checking account when your monthly repayment is processed. If you make an early payment (full or partial), you’ll receive cashback proportional to the amount paid. Your Mercury accounts must be open and in good standing to receive cashback. Cashback rewards may be forfeited if your account is closed or pending closure based on a violation of any applicable terms. Mercury may modify or terminate the cashback program at any time, and any promotional offers or other changes will be communicated by email or on our website. If you have questions about your cashback, please contact Mercury at help@mercury.comOpens in new tab.