Mercury is a financial technology company that provides business banking services for startups, venture-backed companies, and small businesses. It does not hold a bank charter but routes deposits through federally insured partner institutions.
The platform combines checking, savings, treasury, and corporate card products under a single dashboard. It has been widely adopted across the U.S. startup ecosystem, particularly by companies formed through incorporation services like Stripe Atlas or Y Combinator.
What the product is structurally
Mercury operates as a fintech platform layered on top of partner depository institutions. Deposits are held at Evolve Bank & Trust and Choice Financial Group, both members of the FDIC. Standard insurance coverage applies up to $250,000 per depositor per institution.
Mercury also offers expanded sweep coverage through an insured cash sweep network that distributes deposits across multiple partner banks. This arrangement can provide effective coverage up to $5 million, depending on the structure of the business’s total deposits.
The platform issues both debit and credit cards under Visa branding. Mercury’s credit product is a charge card, not a revolving line, which requires full payment each billing cycle.
How it works in practice
Mercury accounts support standard banking operations: ACH transfers, domestic and international wire transfers, mobile check deposit, and bill pay. The dashboard aggregates all transactions and supports tagging and filtering for accounting purposes.
The Mercury Treasury product allows businesses to direct idle cash into money market funds managed by third-party asset managers. These funds invest primarily in short-term government securities and are not FDIC-insured, but are registered with the SEC.
Mercury IO is a companion corporate card product tied to the business’s deposit balance. The credit limit is typically set as a fraction of the average cash balance in the connected account. Mercury Perks provides access to partner discounts on software tools commonly used by startups.
Fees and pricing mechanics
The standard Mercury checking account carries no monthly fees, no minimum balance requirements, and no domestic wire fees. Incoming international wires incur no fee. Outgoing international wires carry a flat fee per transaction, typically around $25 as of early 2026.
Mercury Plus and Mercury Pro are paid tiers, priced at $35 and $350 per month respectively. These tiers unlock higher wire limits, dedicated account support, additional user permissions, and higher API rate limits.
The Treasury product does not charge a direct management fee but earns a spread on the underlying fund. The effective yield depends on prevailing short-term interest rates and the fund’s expense ratio, which varies by fund selection.
Limits, eligibility, and availability
Mercury is available to U.S.-based businesses, including LLCs, C-corps, S-corps, and sole proprietorships. Founders do not need to be U.S. citizens or residents if the business is incorporated domestically. The application is fully digital and requires an EIN, formation documents, and beneficial ownership information.
Approval typically takes one to three business days, though some accounts require additional documentation review. International businesses incorporated outside the U.S. are generally not eligible for standard Mercury accounts.
Daily ACH and wire limits are configured by default and can be increased through account settings, subject to review. High-volume businesses may need to contact support to negotiate custom transaction limits.
Tradeoffs, risks, or limitations
Mercury does not hold a bank charter. If the company faced operational difficulties, continuity of access would depend on the partner banks — though deposits themselves would remain insured.
The charge card product does not allow businesses to carry a balance. Companies that routinely need revolving credit would require a separate facility. Card limits are typically tied to the connected deposit balance, which can constrain purchasing power for capital-light companies.
The Treasury product exposes business cash to money market fund risk. These funds do not carry FDIC insurance and can, in rare circumstances, experience net asset value fluctuations. During market stress events, short-term government funds have historically remained stable, but are not guaranteed to do so.
Customer support operates through email and in-app channels with no phone option on standard tiers. Complex account issues can take multiple business days to resolve through asynchronous communication.
See also: Mercury Corporate Card Review, Mercury Personal Review, Brex Review, Relay Review
