By Margery Penrose·Published 1 January 2026·Last reviewed 15 May 2026

What to Expect from Online-Only Banks Cash Sweep Accounts

Ally, Marcus, Discover Bank, American Express Bank. Consistently lead rate tables by 1–3 percentage points due to near-zero branch overhead.

For Cash Sweep specifically: The default rate applied to uninvested cash sitting in a brokerage account. Most brokerages default to extremely low rates (0.01–0.50%), quietly siphoning yield from idle capital.. At online-only banks, the rate pattern reflects their cost structure and competitive positioning in the deposit market.

Rate Summary — Cash Sweep at Online-Only Banks

Typical APY range

0.01–4.50%

Minimum balance

Varies

Rate range as of 15 May 2026. Rates change daily — verify before depositing.

Key Characteristics at Online-Only Banks

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