Mercury Profits from Startup Deposits

Mercury makes startup banking unusually profitable when fundraising cash sits idle for months, because every new venture round creates a large, low-friction deposit base that can be swept to partner banks and turned into recurring interest revenue. That is different from card first fintechs, where revenue depends on customers actively spending. A startup that just raised $5M to $50M can produce meaningful revenue for Mercury before it ever becomes a heavy card user or borrowing customer.1 2 3

• This is the same niche Silicon Valley Bank built around for decades, startups with little revenue but large balances. Mercury modernized that model with faster signup, remote workflows, and sweep products like Vault, so it can capture freshly raised cash without needing branches or relationship managers.2 1
• The unit economics are strong because Mercury does not need to lend the money itself. It places deposits with partner banks, gets a share of the yield those banks earn, and layers on other revenue streams like cards, FX, and venture debt. That keeps the core monetization tied to deposit balances more than credit risk.1 2
• It also explains the contrast with Brex and Ramp. Brex and Ramp are driven more by payment volume, expense software, and product attach. Mercury is more exposed to interest rates and venture funding cycles, but when startup cash levels are high, deposits can scale revenue very quickly, as seen in its rise to $500M annualized revenue on roughly $20B of deposits.3 4 5

The next phase is Mercury trying to lock those deposits in for longer by wrapping more workflows around the account, including treasury, bill pay, cards, and venture debt. If it keeps becoming the default place where startup money first lands after a round, it will look less like a thin banking interface and more like the operating system for venture backed cash management.3 2 1