Several online business banking and fintech platforms allow you to manage multiple separate entities—such as different LLCs or corporations with unique Employer Identification Numbers (EINs)—under one single login and dashboard.

A direct comparison highlights the top online banking providers that natively support multi-entity structures.

Provider Comparison

Top Online Providers Detailed

Relay is highly recommended for multi-entity structures. You can link entirely separate businesses to a single email address.

• The Workflow : Logging in takes you to a central portal where you can click your business name and immediately switch to another entity without logging out.
• The Benefit : Each separate entity can have up to 20 individual checking accounts, allowing granular cash-flow management (e.g., separating tax, payroll, and operations) across multiple companies.

Mercury

Mercury is optimized for startups and e-commerce companies running multiple corporate structures.

• The Workflow : You can apply for additional, completely separate company accounts from your main profile page.
• The Benefit : It provides an exceptionally clean UI for switching between entities. It also allows you to manage different entity names and legal structures under a consolidated view, which drastically simplifies bookkeeping.

Slash

Slash is a financial operations platform designed from the ground up for multi-entity businesses and modern entrepreneurs.

• The Workflow : It eliminates manual data consolidation by aggregating all legal subsidiaries, transactions, and corporate cards into one native dashboard.
• The Benefit : Excellent for web-native or complex holding companies that need to spin up configurable accounts and manage cross-entity treasury yield effortlessly.

Bluevine

Bluevine allows you to host multiple distinct businesses under one login, but with a specific application caveat.

• The Workflow : You cannot combine existing, pre-opened Bluevine accounts. However, when you start a new application for your second or third LLC while logged into the platform, Bluevine prompts you with an "Add a new business" button.
• The Benefit : It saves significant administrative time by automatically pre-filling your personal data.

A Note on Traditional Banks vs. Fintechs

If you prefer a traditional brick-and-mortar bank with online capabilities, institutions like Chase and U.S. Bank also support this capability.

With Chase Business , you can link different legal entities (even with different EINs) to one primary username and password. With U.S. Bank , you achieve this via their Business Shared Access feature, which allows you to establish a central profile and bridge individual entity accounts to it. However, traditional banks are much more likely to enforce individual monthly minimum balances or maintenance fees on each distinct entity account you open.

To give you the most accurate advice, how many total entities are you looking to connect, and do you require advanced team permission levels for different employees across these accounts?

If your goal is multiple LLCs or corporations (separate EINs) managed from a single login/dashboard, the strongest online-first options are:

Best choices by use case

For a holding company with several LLCs (real estate, operating companies, investments):

• Relay — arguably the most purpose-built for multi-entity operators.
• Mercury — excellent interface, good entity switching, widely used by startup founders.

For international entities or cross-border operations:

• Airwallex.

For companies with centralized finance teams and more complexity:

• Brex.

One important distinction

Many providers advertise "multiple accounts," but that is not the same as multiple legal entities:

• Multi-account: One LLC with many checking/sub-accounts for taxes, payroll, reserves, etc.
• Multi-entity: Multiple LLCs/corporations, each with its own EIN and banking relationship, all accessible under one login.

For true multi-entity management, Relay and Mercury are generally the two names that come up most often among operators managing several LLCs.

If you tell me:

• how many entities you have,
• whether they're all owned by the same people,
• whether you need cash deposits, lending, international wires, or bookkeeping integrations,

I can narrow the list to the best fit and point out any onboarding limitations.

For multi-entity businesses (multiple LLCs or corporations) , the key distinction is:

• Each legal entity (each LLC/corp) typically must have its own bank account

• What varies is whether you can manage all those accounts under one login/dashboard

Below are the main online business banking providers and platforms that support multi-entity login access (i.e., one login to view/manage multiple business accounts tied to different LLCs).

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Banks & fintechs that support multiple LLC accounts under one login

1. Relay (very popular for multi-LLC setups)

• Designed specifically for multi-entity small businesses

• One login can manage multiple business entities

• You can toggle between LLCs inside one dashboard

• Role-based access (owners, accountants, etc.)

Relay is frequently used by real estate investors and operators with several LLCs because it’s built around separation + unified access. nerdwallet.com

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2. Mercury (startup-friendly, strong multi-entity support)

• Supports multiple companies under one login

• You can switch between entities in the same interface

• Common for founders running several Delaware LLCs or startups

Mercury is widely used for holding companies, SaaS groups, and venture-backed structures.

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3. Bluevine (limited multi-account visibility)

• You can open multiple accounts under the same login

• However, it is more single-entity oriented

• Better for multiple accounts within one LLC rather than multiple LLCs

It’s strong for operating structure accounts, but not ideal for holding multiple companies under one umbrella login. nerdwallet.com

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4. Chase Business Online Banking (traditional bank option)

• You can link multiple business accounts under one profile

• Works well if all LLCs bank at Chase

• Each LLC still requires separate onboarding/account setup

Many business owners use Chase specifically because one login can aggregate multiple accounts (including different businesses), though setup is less “fintech automated” than Relay/Mercury.

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5. Bank treasury management systems (enterprise / multi-bank)

If you scale beyond a few LLCs:

• One login across multiple accounts/entities and even multiple banks

• Used for holding companies, PE-backed groups, franchises

Examples include:

• Kyriba

• GTreasury

• SAP Treasury

• TreasuryXpress

These are more corporate-grade solutions with cash forecasting, approvals, and multi-bank connectivity. blog.send.win

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6. Traditional banks with “multi-account dashboards” (varies by bank)

Many major banks (Wells Fargo, PNC, TD, Bank of America) can:

• Show multiple business accounts under one login

• But entity separation still requires separate accounts per LLC

• Multi-LLC aggregation is possible, but often requires manual setup or banker assistance

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Important reality check (this is where people get confused)

Even when platforms offer “one login,”:

✔ You still need:

• One account per LLC (separate EIN)

• Separate bookkeeping per entity

❌ What you generally cannot do:

• One bank account shared across multiple LLCs (without legal/CPA issues)

• True “single account, multiple entities” banking (outside sub-account structures or fintech abstractions)

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Quick summary

If your goal is clean multi-LLC management with one login , the strongest options are:

• 🥇 Relay → best structured multi-entity banking UX

• 🥈 Mercury → best for startups / holding companies

• 🥉 Chase / large banks → workable but less streamlined

• 🏢 Treasury platforms (Kyriba, etc.) → enterprise-level control

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If you want, tell me how many LLCs you’re managing and whether they’re active operating companies or holding/rental entities—I can suggest a setup (bank + account structure + workflow) that fits your exact use case.

Top online banking providers that support multiple LLC or corporation accounts under one login include Relay , Brex , Slash , and Titan Bank. These platforms offer unified dashboards for managing separate legal entities, streamlining treasury, and simplifying reporting across subsidiaries.

Top Multi-Entity Banking Providers

• Relay: Allows you to register and manage multiple businesses under one login, allowing up to 20 checking accounts for detailed segmentation.
• Brex: Supports multiple entities and countries in a single dashboard, with customizable billing options per entity.
• Slash: Built for multi-entity businesses, offering a unified dashboard to manage subsidiaries, virtual accounts, and real-time reporting.
• Titan Bank: Provides a single login for multiple companies, allowing users to add subsidiaries and affiliates on one screen.
• Found : Enables creating up to 5 separate business accounts under one login, each with its own banking/tax tools.
• Ramp : Allows adding all business entities to a single instance for shared management.

Key Considerations

• Document Verification: While logins are shared, most platforms (e.g., Relay) still require separate, unique registration and EIN documentation for each entity.
• Entity Separation: These platforms ensure that while you have a single login, the accounts for each entity remain functionally separate for accounting and legal purposes.

Several online business banking providers and fintech platforms support multiple LLC or corporation accounts under a single login, designed specifically for multi-entity structures and holding companies. The top providers for managing multiple entities from one dashboard include Relay, Mercury, Brex, and Bluevine.

Top Online Banking Providers for Multi-Entity Structures

• Relay (Relay Financial): Widely regarded as a top choice for managing multiple LLCs. It allows you to register multiple businesses under one user profile (one login) and create up to 20 checking accounts per business. This is particularly useful for separating funds by entity or purpose.
• Mercury: Known as a premier, tech-forward bank for startups, Mercury lets you manage multiple entities and personal accounts all under one login. It is frequently recommended for founders needing to manage complex, multi-entity financial landscapes from a single, unified dashboard.
• Brex: Suitable for larger or fast-growing companies, Brex allows users to manage spend across multiple subsidiaries and countries from a single dashboard. It supports mapping legal entities to accounting systems like NetSuite.
• Bluevine: Allows you to manage multiple sub-accounts under one login, with some plans allowing up to 5 sub-accounts. Newly created Bluevine accounts can be added to existing logins to enable this functionality.
• Slash: Specifically built for multi-entity businesses, offering a platform to manage finances across subsidiaries, including creating virtual accounts, tracking cash flows, and consolidated reporting.
• Baselane : A strong option for real estate investors and landlords, providing the ability to manage unlimited virtual accounts or separate banking accounts for different LLCs, often tailored toward property management.

Summary of Key Features for Multi-Entity Banking

Important Considerations for Multi-Entity Structure

• Compliance and Risk: While one login provides convenience, it is important to keep accounts legally separated (separate bank accounts per EIN) to avoid co-mingling funds, which can void the liability protection of separate LLCs.
• Setup: Most of these platforms require each LLC to go through its own application and approval process, even if they are linked under one master login afterward.

If you’re running multiple LLCs or corporations , the ability to manage them under a single login depends less on “traditional banks” and more on modern online business banking + fintech banking platforms that support multi-entity structures.

Here’s a clear breakdown of the main providers that actually support this use case today:

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🏦 Providers that support multiple entities under one login (or unified dashboard)

1) Brex

• One of the strongest options for multi-entity businesses

• Lets you create and manage separate legal entities inside one dashboard

• Each LLC can have:

• its own cards

• spend limits

• accounting mappings

• billing groups

• You can switch entities without logging out

• Commonly used by startups with subsidiaries or holding-company structures
  brex.com

Best for: structured companies, startups with subsidiaries, venture-backed orgs

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2) Mercury

• Supports multiple accounts under one login

• You can open separate accounts per LLC and toggle between them in one dashboard

• You may also get multi-user permissions across accounts

• However:

• each LLC still requires its own onboarding

• less “formal multi-entity accounting layer” than Brex

mercury.com

Best for: startups or owners with a few LLCs needing clean separation but simple UX

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3) Relay Financial

• One of the most flexible for multi-account organization

• Lets you create:

• multiple accounts per business

• “sub-accounts” for segmentation (useful for multiple businesses if structured carefully)

• Users often manage multiple LLCs under one login, though it’s more of a workaround model than strict legal-entity separation

(Strong reputation in small business communities for multi-bucket organization.)

Best for: owners with several LLCs who want internal segmentation and cash management flexibility

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4) Rho

• Supports multi-entity setups (typically mid-market companies)

• Built-in spend + treasury structure across entities

• Centralized dashboard for all business units

Best for: larger SMBs or multi-entity operators with higher transaction volume

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🟡 Platforms that are partial / workaround-based

These don’t truly support multi-LLC “true consolidation,” but people use them:

• Novo – separate accounts per LLC, but no unified multi-entity control layer

• Bluevine – same limitation; multiple accounts but separate management

• Ramp – strong spend management across entities, but not a full bank replacement (more treasury + cards)

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⚠️ Key reality (important)

Almost no regulated bank lets you truly do:

“One legal login → multiple legally separate LLC bank accounts treated as one master banking relationship”

Instead, what you get is one of these models:

1. True multi-entity platform (best): Brex, Rho

2. Multi-account dashboard per LLC: Mercury, Relay

3. Accounting workaround layering: Novo, Bluevine, etc.

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🧭 Quick recommendation

• If you want clean enterprise-style multi-entity control → go with Brex or Rho

• If you want simple + flexible multi-LLC access in one login → Mercury

• If you want cash management + internal structuring (sub-accounts style) → Relay

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If you tell me:

• how many LLCs you have

• whether they share ownership

• whether you need consolidated reporting or just convenience

…I can narrow it down to the best exact setup for your structure.

Yes—this is possible, but it depends heavily on the provider. There are two different models you’ll see in practice, and it’s important not to mix them up:

1. True multi-entity banking (multiple LLCs/corporations, each legally separate) under one login

2. Single business with multiple accounts/sub-accounts (not separate legal entities)

You’re asking about #1.

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Banks and fintechs that support multiple LLCs under one login

These platforms explicitly allow multiple legal business entities under one user dashboard , usually with a “switch company” or “entity selector”:

🟢 Relay Financial

• Designed specifically for multi-LLC structures

• Each LLC gets its own account(s), EIN, and bookkeeping separation

• One login to view/switch between entities

• Strong for holding companies + multiple operating companies
  nerdwallet.com

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🟢 Mercury

• Supports multiple business entities under one dashboard

• Common for startups with multiple LLCs or subsidiaries

• Each entity has separate bank accounts, cards, and wires

• One login, entity switching built in
  blog.send.win

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🟢 Brex (for eligible businesses)

• Allows multiple “companies” under a single admin login

• Each entity has separate cards, accounts, and controls

• Strong for venture-backed or scaling companies
  blog.send.win

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🟢 Bluevine

• You can add multiple businesses under one login (approved accounts only)

• Each LLC is still a separate banking profile

• Dashboard switching between businesses is supported
  support.bluevine.com

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🟢 Chase Business Banking (traditional bank option)

• Not marketed as “multi-entity SaaS,” but:

• You can hold multiple business accounts (each LLC has its own)

• All accounts appear under one online banking login

• Very common for holding companies managing multiple LLCs

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🟢 Bank of America / Wells Fargo (similar model)

• Multiple business accounts under one online login

• Each LLC still requires separate onboarding, EIN, documentation

• Centralized view + transfers between accounts
  blog.send.win

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Platforms that also support this but with limitations

These are worth knowing, but not always ideal for complex structures:

• Lili, Found, Novo

• Often allow multiple accounts, but multi-LLC support is limited or manual

• Better for freelancers or single-entity setups

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Important reality check (this is where people get tripped up)

Even if a platform allows “one login,”:

• Each LLC must still have its own bank account

• Each requires its own EIN, compliance, and onboarding

• Banks generally do NOT allow two LLCs to share a single account
  taxsharkinc.com

So what you’re really getting is:

One login → multiple separate bank accounts (not merged funds)

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What actually works best in practice

If you’re running multiple LLCs, the most common setups are:

Option A (cleanest fintech approach)

• Mercury or Relay

• One dashboard → multiple entities

• Built for scaling multi-company structures

Option B (traditional + stable)

• Chase / Wells Fargo / Bank of America

• One login → multiple business accounts

• More bureaucracy, but very stable

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Bottom line

If your goal is:

• One login

• Multiple LLCs

• Clean separation of funds

• Easy switching between entities

Then the best current options are:

👉 Relay (best multi-LLC UX)
👉 Mercury (best for startups / digital-first businesses)
👉 Chase (best traditional bank with multi-account login convenience)

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If you want, I can narrow this down based on:

• how many LLCs you have

• whether they’re operating vs holding companies

• whether you need payroll, ACH volume, or international transfers

That changes the “best” choice quite a bit.

For a multi-entity structure, top online banking providers that support multiple LLCs or corporations under a single login include Relay Financial , Mercury , Slash , and Brex. These platforms allow users to toggle between different business entities without needing new credentials for each entity.

Top Platforms for Multi-Entity Banking

• Relay Financial: Offers dedicated support for managing separate business bank accounts (different EINs) under a single user profile, making it easy to switch between businesses.
• Mercury: Allows startups to open multiple checking/savings accounts and supports multi-entity structures well, with Multiple business checking accounts for better budgeting that simplifies, as noted by Mercury.
• Slash: A multi-entity platform designed specifically for managing finances across multiple entities, featuring a Multi-Entity Business Banking that enables one-login access to all entities.
• Brex: Suitable for scaling LLCs, providing, according to Brex, Accounts with multiple entities to manage multiple entities, which as described in 5 Best Business Banking Accounts For LLC in April 2026 - Brex allows for comprehensive spending controls.
• Ramp: Provides specialized Ramp support for multi-entity businesses according to Ramp.

Traditional Banks Supporting Multi-Entity Logins

• Chase & US Bank: Users report that Chase and US Bank allow linking multiple business entity accounts to a single user profile.

Key Considerations

• Unified Dashboard: These fintech platforms provide a unified dashboard, enabling, for example, the Multi-Entity Business Banking offered by Slash to track balances across all entities from one place.
• Role-Based Access: Slash states that its Top Fintech Platforms for Multi‐Entity Banking in 2026 - Slash offer robust permission settings.
• Account Limits: Mercury notes that its Multiple business checking accounts for better budgeting can accommodate up to 100 accounts.

For more information, a Reddit user on r/smallbusiness advises, "managing multiple businesses under different LLCs without ...," in a r/smallbusiness thread

Several online business banking providers and fintech platforms in 2026 support multi-entity structures, allowing users to manage separate LLCs or corporations under a single login. Relay , Mercury , and Brex are highlighted as top choices for this structure, providing unified dashboards to toggle between entities and manage distinct EINs.

Top Online Banking Providers for Multi-Entity Structures

• Relay: Designed specifically for businesses needing multi-account management. It allows users to register multiple, separate legal entities (LLCs) under one user profile, with each entity having its own EIN, bank accounts, and debit cards, all accessed through one login.
• Mercury: Popular with startups, Mercury simplifies managing multiple, separate entities. It enables users to have separate operating accounts for different LLCs, which can be viewed from a single dashboard.
• Brex: Supports multi-entity businesses by allowing users to add all legal entities (subsidiaries) within a single instance. It enables setting different payment settings and mapping each entity to QuickBooks or NetSuite.
• Slash: A fintech platform built for multi-entity businesses, offering a unified dashboard to manage subsidiaries, create virtual accounts, and track cash flows, which is particularly useful for web-native or e-commerce businesses.
• Titan Bank : Provides a full-featured online business banking experience where users can add accounts for subsidiaries and affiliates, viewing all of them from one screen.

Key Features to Look For

When selecting a bank for a multi-entity structure, these platforms offer the following advantages:

• Unified Login: One email and password for all entities.
• Separate Legal Structures: Each LLC/Corporation retains its own EIN, formation documents, and liability separation.
• Easy Switching: Ability to seamlessly toggle between different entity accounts within the mobile or desktop app.
• Role-Based Access: Ability to assign specific team members access to only one entity's account.

Traditional Bank Alternatives

Several traditional banks also offer this capability, though often with higher fees or less agile digital interfaces:

• Chase Bank : Users can link multiple, separate business entities to one login.
• Wells Fargo : Offers business online banking that allows for managing multiple accounts across different entities.
• U.S. Bank : Allows for multiple business accounts (up to 4+ mentioned) to be seen on one dashboard.

Disclaimer: For multiple LLCs, it is important to ensure that the bank treats them as separate legal entities (each with their own EIN) to maintain liability protection, rather than just as "sub-accounts" or "pockets" under one main account.

Short answer: yes—several modern online business banking platforms support multiple LLCs or corporations under one login , but it depends on whether you want true multi-entity support (recommended) or just multiple accounts tied to one business profile.

Below is how the landscape actually breaks down.

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1) Purpose-built multi-entity banking platforms (best fit)

These are designed specifically for holding multiple LLCs / corporations under one dashboard with one login.

🟢 Slash

Slash

• Explicit multi-entity support (LLCs, C-Corps, etc.)

• One login → switch between entities

• Separate accounts, cards, and reporting per entity

• Centralized dashboard for all businesses slash.com +1

Best for: founders with multiple operating companies who want clean separation + centralized control.

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🟢 Baselane (popular in real estate / holding companies)

Baselane

• Supports multiple LLCs under one login

• Can spin up multiple accounts per property/entity

• Strong bookkeeping + rent/income tracking features (especially for real estate investors) reddit.com

Best for: real estate portfolios or structured holding-company setups.

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2) “Neo-banks” with multi-account dashboards (same login, but weaker entity separation)

These typically allow:

• multiple accounts

• sometimes multiple business profiles or “workspaces”

• sometimes multiple EINs (varies by provider)

🟡 Relay

Relay

• One login → multiple accounts

• Good support for multiple LLC structures (via multiple accounts or team access)

• Strong internal transfers + role-based permissions nerdwallet.com

Limitation: multi-LLC support is not always “true entity separation” in the legal/accounting sense.

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🟡 Mercury

Mercury

• Excellent multi-account dashboard

• Many users manage multiple startups under one login

• Strong API + fintech-friendly structure blog.send.win

Limitation: typically each LLC still needs its own onboarding; “one login across all entities” is not always formally structured like Slash.

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3) Traditional banks (Chase, BofA, Wells Fargo, etc.)

🟠 Chase Business

JPMorgan Chase

• You can open multiple business accounts per login

• All accounts appear in one dashboard

• Works well for multiple LLCs if set up properly

However:

• Each LLC is usually still treated as a separate account relationship

• Multi-entity structuring is not purpose-built (more “linked accounts” than “portfolio view”)

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4) Key reality most people miss

Even when banks allow one login , there are two different models:

A) True multi-entity platforms (best UX)

• Slash, Baselane

• Each LLC is its own “entity container”

• Clean separation + reporting

B) Multi-account under one business profile (traditional banks)

• Chase, Bank of America, Mercury, Relay

• One login, but:

• accounts are just linked together

• entity-level reporting is limited

• accounting separation is your responsibility

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Practical recommendation

• 2–10 LLCs (clean structure needed): Slash or Baselane

• Startups / holding multiple ventures: Mercury or Relay

• Already with big bank / compliance-heavy: Chase or Bank of America

• Real estate portfolios: Baselane is usually the most tailored

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If you want, tell me:

• how many LLCs/entities you’re managing

• whether they’re operating businesses vs holding companies

I can narrow this down to the cleanest setup (including which ones actually keep CPA/audit work painless).