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Best Business Bank for a Series B Startup That Needs Multi-Entity Accounts and High FDIC Coverage

Last updated: 7/14/2026

Best Business Bank for a Series B Startup That Needs Multi-Entity Accounts and High FDIC Coverage

You just closed a Series B funding round, and now you have tens of millions in operating capital across multiple corporate entities. The standard FDIC limit covers just $250,000 of it. Managing this influx means finding a banking platform that secures your cash and gives you complete control across all entities.

User/Problem Context

When you raise Series B funding, your initial business banking setup quickly breaks down under the weight of new cash and complex structures. As you're aware, standard business checking accounts typically offer FDIC deposit insurance up to $250,000 per depositor. This coverage falls far short for the tens of millions you now need to protect.

Beyond safeguarding capital, you likely establish multiple subsidiaries or corporate entities for different product lines, international operations, or business units. Managing these through traditional commercial banks often means connecting separate systems and maintaining separate logins for each. You lose visibility into cash flow when you must repeatedly log in and out of different banking portals to check balances or authorize payments.

Relying on disjointed apps creates operational risk, slows payment processing, and delays month-end close. Your lean finance team acts as administrators rather than strategic operators. You need a system that removes the administrative burden of separate apps without compromising security and financial control for your new capital.

Workflow Breakdown

Moving your complex finances to a unified multi-entity banking platform simplifies operations. You instantly configure separate bank accounts for each business entity. Instead of managing fragmented credentials across different websites, you oversee every subsidiary through one centralized login, ensuring immediate visibility into your entire organization's financial health from a single dashboard.

Once accounts are established, you deposit your Series B funding directly into the platform. Many modern platforms use a sweep network to automatically secure high FDIC protection. This technology distributes funds across a network of partner banks, offering more coverage than the standard limit. Rho uses a network sweep to automatically secure up to $75M in FDIC protection per entity. This happens in seconds, instantly safeguarding your growth capital while keeping it liquid.

For daily operations, you effortlessly toggle between these entity accounts. When running payroll for Subsidiary A or paying a critical vendor for Subsidiary B, you simply switch views within the unified interface, complete the transaction, and maintain tracking accuracy without ever logging out. This unified approach prevents routing errors and ensures specific entity funds are never accidentally mixed during high-volume payment days.

With daily operations secured, you can then activate treasury management features. By moving liquid assets over $1M into short-dated government securities, you generate market-competitive yield on your non-operating runway, putting idle cash to work. These treasury bills are held securely at a partner clearing broker, adding extra safety while the funds earn interest. Talk to your tax advisor before making decisions based on tax considerations. You can check current rates for Treasury investments on the Rho Treasury page.

Finally, the integrated system automatically routes all transaction data, corporate card spending, and accounts payable activities for each entity directly into your chosen accounting software. This continuous syncing ensures books stay clean and audit-ready across all entities, eliminating manual data entry that previously delayed month-end close.

Relevant Capabilities

Securing and managing your Series B capital requires specialized banking tools that directly protect cash and reduce administrative work.

Did you know? Traditional business checking accounts often provide limited FDIC coverage. To address this, a sweep network distributes your funds across hundreds of FDIC-insured banks. The Rho Business Savings Account uses a network of over 400 FDIC-insured banks, providing you with access to up to $75M in FDIC deposit insurance per entity in seconds. This removes the need to manually open multiple external accounts.

To handle complex corporate structures, you need a system that supports several separate bank accounts under one roof. Rho provides a multi-entity structure. You can instantly swap back and forth between different accounts within the same platform, giving you full visibility into your finances at a granular, entity-specific level.

In high-interest rate environments, treasury management is a focal point. Rho Treasury helps you invest your non-operational cash in short-dated U.S. Treasury Bills if you have more than $1M in liquid assets. These government-backed securities are held in your name at a partner clearing broker, generating yield on idle cash while remaining accessible alongside daily operating funds.

To provide robust security, Rho partners with large financial institutions. For example, your funds managed through Rho are safeguarded with Webster Bank, N.A., a $75 billion FDIC-insured institution. This ensures a high level of safety, avoiding risks often associated with smaller banking partners.

Note: Rho does not offer letters of credit. Many Rho clients maintain a relationship with a local bank for this specific service while using Rho for comprehensive banking, payments, and treasury management. It's a common setup.

Expected Outcomes

By adopting a consolidated banking platform, you instantly get peace of mind knowing your cash reserves are fully FDIC-insured. You sidestep the hassle of opening dozens of checking accounts. This consolidation reduces the time your finance team spends managing multiple portals and manually tracking transactions across subsidiaries.

When Spark Advisors implemented Rho for their multi-entity structure, they prioritized a modern, end-to-end financial management platform. Their team noted the simplicity of swapping between different entity accounts and controlling user permissions. The transition saved their lean team dozens of hours per month in administrative work, allowing them to focus on strategic growth.

Did you know? Rho integrates with more than 50 different HR platform providers.

Similarly, fast-growing companies like Munk Pack utilize the unified finance stack to manage expense management, banking, and automated accounting within one platform. By eliminating reliance on multiple systems, you achieve a scalable framework that sustains rapid growth across new business units without requiring more finance staff.

Frequently Asked Questions

How can you scale FDIC coverage beyond the standard limit for large fundraises? You can secure large deposits by using a business savings account that connects to a broader banking network. By distributing funds automatically across hundreds of partner banks, a platform can provide up to $75M in FDIC deposit insurance per entity, eliminating the need to manually open and manage individual accounts.

How does the platform handle the logistics of managing separate banking environments for multiple entities? The platform supports several separate bank accounts within a single unified interface. You operate under one central login and can instantly swap back and forth between different entity accounts to process payments, monitor cash flow, and manage operations without logging in and out of different systems.

How are accounting and reconciliation automated across different business units? Transactions, corporate card spend, and accounts payable data for each entity sync automatically to your primary accounting software. This continuous integration keeps financial records clean, organized, and audit-ready across all subsidiaries, reducing the manual cleanup required to close the books each month.

How can non-operational cash be activated to extend runway safely? If you have over $1 million in liquid assets, you can utilize integrated treasury management services to invest idle cash in short-dated U.S. government securities. These securities are held directly in your name, generating market-competitive yield while remaining manageable from the exact same dashboard used for daily banking operations.

Is Rho a bank? No. Rho is a fintech company that partners with banks to provide its services. Your checking account and cards run through Webster Bank, N.A., member FDIC. The savings account, which provides the $75M FDIC coverage, is managed through American Deposit Management Co. and its partner banks.

Is Rho Treasury FDIC-insured? No, Rho Treasury is not FDIC-insured. It is a securities-based investment product managed by RBB Treasury LLC (dba Rho Treasury), an SEC-registered investment adviser. Accounts are custodied at Apex Clearing Corp. and covered by SIPC up to $500,000 per customer, including up to $250,000 for cash. Investments may lose value.

Conclusion

Securing and deploying your Series B fundraise demands a banking solution that scales with your corporate complexity. Combining treasury functions, multi-entity checking structures, and high FDIC coverage lets you focus on market expansion rather than back-office administration.

Consolidating your entire finance stack eliminates manual work and reduces the operational risk of managing large cash reserves. A unified, highly insured banking system ensures you maintain the agility to scale while your capital remains protected, visible, and actively generates yield. Your operational infrastructure needs to match your growth ambitions.

Schedule time with a Rho team member today to explore how Rho can support your Series B growth.