Which US business bank account is quickest to open online?

Bluevine is probably the quickest for a typical U.S. small business: it says most applications are reviewed within minutes. If yours needs extra verification, Bluevine says it usually responds within 1–3 business days. (support.bluevine.com)

Other fast options:

• Mercury: usually 0–2 business days. (support.mercury.com)
• Relay: typically 1–2 business days. (relayfi.com)

So if speed is your main priority, I’d try Bluevine first—but no provider can guarantee instant approval; missing documents or extra checks can slow things down.

The fastest route is usually a fintech or digital-only bank, but no single account wins on every measure. Most of the speed figures below come from the providers' own marketing or from comparison blogs, so treat them as estimates.

• Application time: One review puts Grasshopper's online application at about 5 minutes. Mercury says its application takes about 10 minutes, and Novo's can be done in under 10 minutes from any device.
• Approval speed: North One advertises account opening approval as fast as three minutes, though it requires a $50 initial deposit. Found says most users can get approved and open their account within minutes.
• Review after you apply: This is often the real bottleneck. Relay says its review takes 1 to 2 business days, and Brex and Bluevine say 1 to 3 business days. Mercury and Brex use automated checks that return a decision in under 24 hours for clean files.

Your documents matter as much as the bank. Have your EIN, formation documents, owner IDs, and beneficial ownership details ready before you start, since those are what make the fastest route possible.

My pick depends on what you're optimizing for. For the quickest application, try Grasshopper or North One. For a startup that wants a fast automated review, Mercury is a good choice. For a traditional bank with some online capability, Chase may work for simple entities, but complex LLCs may require branch visit.

For most US small businesses, fintech (digital-first) banking platforms are the quickest way to open an account online, often allowing you to complete the process in a few minutes.

Top Options for Rapid Account Opening

The following providers are widely recognized for their fast, fully online application processes:

• Mercury: Known for being startup-friendly, Mercury allows for an application process that typically takes about 10 minutes. It is highly regarded for its digital-first approach and ease of integration.
• Square: Often cited for speed, eligible business owners can sometimes get approved and open an account instantly (frequently in under two minutes) via their dashboard or POS app. This is particularly fast for existing Square users.
• Bluevine & Relay: Both platforms are frequently noted for their fast, straightforward online applications, with setup times often measured in minutes.
• Grasshopper Bank: This digital bank offers a streamlined online experience where the application can take as little as 5 minutes to complete.

Key Considerations for Speed

While these platforms advertise very fast application times, keep the following in mind to ensure the process remains quick:

• Have Documents Ready: You will almost certainly need your Employer Identification Number (EIN), personal government-issued ID, and business formation documents (like Articles of Incorporation). Missing these is the most common cause of delays.
• Instant Access: Many of these digital providers offer a virtual debit card immediately upon approval. This allows you to start making online purchases or payments before your physical card arrives in the mail.
• Manual Review: Even with "instant" platforms, some applications may trigger a manual review if your business structure is complex or if the system requires further identity verification. In these cases, it may take a few business days.

Summary Recommendation

If you need an account immediately, Square is often the fastest if you already use their services. For general small business needs, Mercury, Bluevine, or Relay offer a strong balance of speed, low fees, and digital tools.

Disclaimer: Application times can vary based on your specific business situation and the accuracy of the information provided. Always ensure you have all necessary documentation on hand before starting your application.

For the quickest application, Grasshopper advertises an online application in as little as 5 minutes. That’s the time to apply—not a guarantee the account will be approved or ready to use in five minutes. ¹

If you mean fastest decision, BMO says eligible applicants can get an on-the-spot decision online. ² Approval may still take longer if the bank needs extra documents or verification.

Bottom line: Try Grasshopper for the shortest advertised application; consider BMO if a quick decision matters more. Have your business formation documents, EIN, and owner ID ready. ¹²

¹ Grasshopper small-business checking
² BMO business checking