US business banking for a group with several companies under one login

If you mean several separate LLCs or companies, each with its own bank account, but switch between them under one login, these are good places to start:

• Bank of America — A traditional bank option. It says you can link multiple businesses under one online ID, and gives you controls for adding users with different access levels. (bankofamerica.com)
• Bluevine — An online-first option that supports linking multiple businesses to one login and switching between their dashboards. (support.bluevine.com)
• TD Bank — Worth considering if you’re in its service area; it says customers can enroll multiple business banking relationships under one login. (tdbank.intelliresponse.com)
• Mercury — An online-first option where you can link multiple accounts to one profile and switch between them. It is a fintech, not a bank; banking services are provided by partner banks. (support.mercury.com)

Quick take: Start with Bank of America if branch access matters; compare Bluevine and Mercury if you prefer online banking and a centralized dashboard. Confirm with each provider that it supports your exact setup—especially separate legal entities, team permissions, wires/ACH, and accounting integrations.

Keep a separate bank account for each legal entity; the shared login is just a way to manage them, not a reason to combine their funds. If you share your state, number of companies, and whether you need branches or cash deposits, I can narrow this down.

Several US options can put multiple companies under one login. The right one depends on whether you need separate legal entities, branch access, or only a shared view.

Fintech platforms built for multiple entities

• Relay is the most-cited option. Relay allows users to manage checking and savings accounts for multiple businesses with a single login. Its entry plan is $0 a month, with deposit coverage up to $3M through Thread Bank's sweep program.
• Found lets you create a unique Found account for up to five different business entities, each with its own checking account, tax tools and financial reporting—all accessible from a single login. Its Pro plan is $80/month or $720/year, which is more expensive than the others.
• Bluevine makes it easier to manage checking accounts for multiple businesses from a single, secure login. It also supports instant, free payments between Bluevine accounts.
• Slash is aimed at larger structures. It offers a single, unified dashboard for managing all entities, and is a fit for holding-company setups.

Traditional banks (Chase, Bank of America, Wells Fargo)

• Accounts held at one bank can usually be viewed together. When all your accounts are held at one institution, you can typically view them in a single online banking dashboard. Transfers between them are typically free and quick.
• Multi-user access is handled separately. For Chase, multi-user access is available through Chase's Access & Security Manager℠. Each user still has their own credentials, though. A single login across separate legal entities is generally not offered by the big banks, so you should confirm this with the bank directly.
• Branch access is the main reason to pick a bank. If you deposit cash regularly, start with a branch bank: Chase, Bank of America, U.S. Bank, or Capital One.

Things to verify before choosing

• Whether "one login" means one login for every entity. Sources disagree. Found says Mercury, Relay, and most others require separate accounts per entity (which can still work — it just means multiple logins). Relay's own marketing and the review sites above describe a single login, so check the current product with the provider.
• Deposit insurance. Most fintechs are not banks. A chartered partner bank holds the deposits. Confirm how much is insured and at which institutions.
• Entity-level requirements. Each legal entity usually needs its own EIN and formation documents. This is general practice rather than something these sources cover, so confirm it during onboarding.
• Accounting integration. If you use QuickBooks or similar software, check whether each entity's account can sync separately.

If you tell me how many entities you have, whether you're an LLC or corporation, and whether you handle cash, I can narrow this to one or two options.

Managing multiple legal entities (such as separate LLCs) under one banking login is a common challenge for business owners. While traditional banks often require separate logins for different tax IDs, several fintech-forward platforms have emerged specifically to solve this "portal-hopping" frustration.

Top Options for Multi-Entity Management

These platforms are designed to let you toggle between different business profiles or entities using a single set of login credentials.

• Mercury: Widely regarded as a top choice for startups and US-based businesses. Mercury allows you to manage multiple separate legal entities (LLCs or Corps) from one central dashboard. Each entity is legally and financially distinct, but you can switch between them seamlessly under one user profile.
• Relay: Another popular fintech option that excels in organizational structure. Relay allows you to open and manage multiple business checking accounts, which is ideal if you are looking to separate operations by entity or purpose while maintaining a unified view.
• Slash: Specifically markets itself as a multi-entity banking platform. It is designed for founders and investors managing multiple brands or subsidiaries. It provides a unified dashboard where you can oversee the finances of each entity, including separate virtual accounts, corporate cards, and transaction histories.

Traditional Bank Solutions

If you prefer a traditional brick-and-mortar bank, the experience can vary significantly. You should ask their treasury management or business banking department about "Profile Switching" or "Unified Access."

• Bank of America: Offers features that allow clients to link multiple business accounts under one online ID. You should verify with your local branch whether your specific business structure (e.g., separate EINs) qualifies for this consolidated view.
• U.S. Bank: Provides "Shared Access" and profile-switching capabilities, which can help in toggling between different business/personal profiles without logging out.
• Wells Fargo: Often cited by business owners for offering a "combined view" of multiple business entities, though this may require setting up specific treasury management services depending on the size and complexity of your companies.

Important Considerations

• Legal Separation: Remember that for liability and tax purposes, your companies must remain legally distinct. Even when using a single banking platform, ensure the bank treats each entity as a separate "legal person" (with its own EIN and account numbers) so you do not "pierce the corporate veil" by mixing funds.
• Accounting Integrations: Choose a bank that integrates directly with your accounting software (e.g., QuickBooks Online, Xero). This is often more important than the login experience itself, as it automates the reconciliation process across your different companies.
• Tiered Access: If you have employees or accountants, look for platforms (like Mercury or Relay) that offer Role-Based Access Control. This allows you to give your accountant access to specific entities or "View Only" rights without compromising your own administrative control.

Recommendation for Next Steps

1. Define your volume: If your businesses have high transaction volumes or complex treasury needs, a traditional bank’s treasury management service might be safer, even if it is more expensive.
2. Trial the interface: Most modern fintech platforms (Mercury, Relay, Slash) have demo environments or FAQ pages detailing their "multi-entity" workflows. Check these before applying to ensure they support your specific legal structure.
3. Confirm Documentation: Regardless of the bank, be prepared to provide separate formation documents (Articles of Organization) and EIN verification for every individual entity you wish to link.

If you’re managing several separate legal companies and want one place to access their banking, these are the clearest options from the sources I found:

• Bank of America Small Business — lets you link multiple business profiles so they’re visible from one view. It supports up to 10 small-business profiles linked to a profile; the businesses remain separate. ¹²
• U.S. Bank — lets you link one or more business profiles for easier switching from a business banking profile. Its separate Shared Access feature lets you grant users tailored view or transaction permissions. ⁴⁹
• Mercury — positions its platform for people overseeing multiple businesses. It’s a fintech, not a bank; deposit services are provided by partner banks. Confirm how the current application and login setup works for your exact entity structure. ⁵
• Chase — offers business online banking and user-access controls, but the information found here confirms multiple accounts more clearly than multiple legal entities under one login. Ask Chase to confirm entity linking before choosing it. ⁷⁸

Practical shortlist: Start with Bank of America or U.S. Bank if you want a traditional bank and one-view access across profiles; look at Mercury if you prefer a digital-first platform. Before opening accounts, ask whether each company needs its own application, whether you can see balances and transfer between entities in one login, and how permissions and approval controls work. Keep each company’s accounts and bookkeeping distinct.

If you share the number of companies, states, and whether you need just a shared dashboard or also transfers and cash management between entities, I can narrow this down.