Mercury Treasury review

Mercury Treasury is an investment service for Mercury banking customers, run by Mercury Advisory LLC, an SEC-registered investment adviser. Cash goes into Mercury-exclusive funds and a U.S. Treasury ladder with one rung maturing each month, on or around the 15th, and near-term cash is kept liquid for upcoming expenses while long-term cash is placed for yield. Automatic transfers move money between checking and Treasury, and withdrawals draw from the most liquid holdings first, with a warning before any early sale of a Treasury. Eligibility starts at a $250K balance across Mercury accounts. There is no fee to open or transact, but Mercury charges 0.15% to 0.6% of monthly Treasury positions depending on total deposits. Banking itself is $0 per month, and Mercury Plus is $29.90 per month on annual pricing. Like Brex and Ramp, it manages cash held at Mercury only and does not connect to other banks.

Who it is for

Companies holding $250K or more in idle cash

Price

Mercury banking $0 per month; Mercury Plus $29.90 per month on annual pricing; Treasury fee 0.15% to 0.6% of positions.

$29.90 per month For businesses that need more efficiencies and streamlined invoicing.
Quoted from the vendor pricing page on November 12, 2026.

Key features

• Portfolio of Mercury-exclusive funds and U.S. Treasury ladders
• Ladder rungs mature monthly, on or around the 15th
• Automatic transfers between checking and Treasury
• Up to $5M in FDIC insurance on deposits through partner banks
• Withdrawals draw from the most liquid holdings first

Strengths and weaknesses

• Strength: No fees to open or transact in Treasury
• Strength: Ladder yield shown net of fees and transaction costs
• Strength: Mercury banking plan costs $0 per month
• Weakness: Requires a $250K balance across Mercury accounts
• Weakness: Monthly fee of 0.15% to 0.6% of Treasury positions
• Weakness: Selling a Treasury before maturity can realize a loss

Key facts

• Minimum balance: $250K across Mercury accounts
• Advisory fee: 0.15% to 0.6% of positions
• Ladder: One rung maturing each month
• FDIC coverage: Up to $5M
• Adviser: Mercury Advisory LLC, SEC-registered

Where it ranks

Mercury Treasury is No. 10 in our Best Treasury Management Software verdict.