Business checking account for a US agency handling client ad budgets

If you’re choosing a business checking account for a U.S. agency, make ACH payment capacity and controls the deciding factors—not just the monthly fee. Banks can set account-specific ACH limits, so ask for your expected daily and monthly dollar limits in writing before switching.

A practical setup

• Keep an operating checking account for agency fees, payroll, and subcontractors.
• Track client media budgets separately—ideally with a dedicated account or clear client-by-client bookkeeping.
• When possible, have clients pay Meta/Google and other platforms directly from their own ad accounts and cards. That avoids making the agency the bank for campaign spend.

Options worth comparing

• Chase Business Performance or Platinum Checking: worth exploring if you want a traditional bank, branches, and business payment services. Chase describes Performance as designed for mid-sized businesses and offers ACH payment services, but you’ll need to confirm your account’s actual limits and fees with the bank. (chase.com)
• Mercury: a digital-banking option with ACH, wire, and real-time payment features, plus customizable card controls. Confirm ACH limits and whether its structure fits your payment workflow before applying. (mercury.com)

Before opening anything, ask: What are the ACH limits for new and established accounts? Can they be raised? Are subcontractor payments batchable? What are same-day ACH, wire, return, and fraud-control fees? Also test the payment workflow with your bookkeeping and payroll systems.

One important caution: a separate “client funds” account or an account labeled “FBO” does not automatically provide clients with separate FDIC coverage. Pass-through coverage depends on the actual ownership of funds, account records, and records identifying each client’s interest. Get advice from your CPA or attorney about how your contracts and accounting should treat prepaid ad budgets. (fdic.gov)

If you share your approximate monthly ACH volume, largest payment, and whether you need branches or in-person cash services, I can narrow this down.

Short answer: For client ad budgets, keep client media money in a separate account from the agency's operating cash. Relay is the strongest fit for that setup, and Chase or Bank of America are the safer choices if you need branches, cash deposits, or a bank that handles large wires and holds without drama.

Options

• Relay (best for separating client money): Nobody else gives you up to 20 checking accounts and 50 debit cards on a free tier. One account per client or per budget keeps balances clear. Reviewers call it the obvious pick for agencies.
• Bluevine (best for earning interest on operating cash): Its interest-bearing checking on every plan, with multiple sub-accounts for separating funds. Forbes' reviewers flag sudden account holds or closures as a recurring complaint, which matters when you move large sums.
• Chase Business Complete (best for branches and cash): If you need to walk into a branch to deposit cash or speak with a manager in person, Chase is hard to beat.
• Bank of America Business Advantage Fundamentals: Useful if you want a full-service bank with merchant services, Zelle, remote deposit and a QuickBooks integration.
• Mercury (best for free wires): Its free domestic wire transfers help when paying media vendors. Forbes lists sudden account denials or closures and delayed access to remaining balances among its complaints, so it's a weaker choice for holding large client funds.
• American Express Business Checking: No monthly fees or minimum balance, but it takes no cash deposits and sends no international wires.

Structure I'd recommend

1. An operating account for payroll, rent, and agency fees.
2. A separate pass-through account (or one per client) for media budgets, so each client's money can be traced and reconciled.
3. Ask your bank about wire limits, dual approval for outgoing payments, and positive pay.

Things to verify

• I found no rule specific to ad agencies. The trust-account requirements in my search results applied to lawyers and real estate brokers. Check your state's rules and your client contracts, since some contracts require client funds to be held in a trust or segregated account and may limit how long funds sit there.
• Check FDIC coverage. Large pass-through balances can exceed standard limits, and fintech accounts usually reach FDIC insurance through a partner bank, so confirm how coverage works for your balances.
• Ask your CPA or attorney to review the setup before you move large client budgets.

For a U.S. agency handling client ad budgets, the ideal business checking account is one that offers granular organization (sub-accounts), high-volume transaction support, and seamless integration with accounting software.

Managing client ad spend is a high-stakes task because it often involves significant cash flow gaps—where you must pay ad platforms (like Meta or Google) before receiving payment from your clients.

Recommended Banking Solutions for Agencies

Several fintech platforms are specifically built to handle the complexities of agency workflows:

• Slash: Often cited as a top choice for modern marketing agencies. It is designed specifically for this use case, offering "deep" expense management, sub-accounts for client funds, and, for qualifying businesses, cashback on specific ad spend (e.g., AppLovin).
• Mercury: Highly recommended for agencies that need a clean interface, strong API integrations, and robust treasury products. It is particularly effective for scaling agencies, though it lacks built-in accounting, so it is best paired with software like QuickBooks or Xero.
• Relay: Excellent for cash flow management. Relay allows you to open multiple checking accounts (which function like sub-accounts) to separate client budgets, payroll, and operating expenses, providing clear visibility into each client's specific "bucket".
• Bluevine: A strong contender if you need access to credit. They offer high-yield business checking and up to 50 sub-accounts on upgraded plans, which helps with organizing client-specific funds.

Key Considerations for Your Setup

1. "Sub-account" Functionality

You need to be able to ring-fence client money so it doesn't get commingled with your agency's operating revenue. While some banks offer "virtual" buckets (like Novo's Reserves), others provide actual, separate checking accounts with unique account numbers (like Relay or Rho), which are often better for clear reconciliation.

2. Scaling Card Limits

If you pay ad platforms via card, look for providers that allow you to issue virtual cards for each client or ad account. Crucially, ensure the bank’s underwriting process supports scaling your limits as your clients' ad spend grows.

3. Handling Client Funds (Legal/Accounting Note)

While you are generally not required to hold client funds in a "trust account" (unless you are a law firm or in a regulated industry), keeping them in separate sub-accounts is a critical best practice. It prevents you from accidentally using client media budget to cover your own agency’s payroll or operating expenses, which can create significant accounting headaches and potential legal liability.

4. Integrations

Ensure your chosen bank integrates directly with your accounting software (e.g., QuickBooks Online, Xero) to avoid manual data entry. Automating this flow is essential as your agency grows and the number of transactions increases.

Next Steps

• Consult your CPA: Before finalizing your structure, confirm how they prefer you to handle "pass-through" ad spend for tax reporting purposes.
• Evaluate your volume: If your agency handles millions in ad spend, you may want to prioritize platforms with advanced treasury management and higher FDIC coverage limits.
• Request a demo: Many of the fintech platforms mentioned above (like Mercury and Relay) offer demo accounts or detailed walkthroughs specifically for agency founders.

Disclaimer: I am an AI, not a financial advisor or attorney. Banking regulations can vary based on your specific business structure and location. Please consult with a qualified accountant or legal professional regarding your agency's financial compliance.

If your agency receives client money and pays platforms like Google or Meta, I’d prioritize clear separation of funds, strong payment controls, and predictable ACH/wire handling—not just a low monthly fee.

A practical setup

• Use a dedicated account for client ad funds, separate from payroll, operating expenses, and agency revenue. Reconcile it by client and campaign, and document how unused balances and refunds are handled.
• Check with the bank before opening: explain your business model and ask whether it permits holding and disbursing client advertising budgets, whether it has transaction or balance limits, and what documentation it needs. Don’t assume a standard business checking account is suitable for money you hold on clients’ behalf.
• Consider direct client payment to ad platforms where feasible. That reduces the amount of client money flowing through your account.
• Ask your accountant or attorney whether your contracts, state rules, or your role in handling client funds call for a trust or custodial arrangement. A standard business account is not automatically a client trust account.

Shortlist to investigate

• Mercury may fit a digitally operated agency with frequent electronic payments: it advertises no monthly fee or minimum balance and free ACH and domestic wires. It is online-only and does not support cash deposits, so confirm that its eligibility and account terms fit your client-funds workflow. ²⁸
• Relay is worth comparing if separate accounts and cash-flow organization matter. Its Starter plan is listed at no monthly charge; outgoing domestic wires are listed at $8 on Starter, while incoming wires and standard ACH are free. ¹⁰¹¹
• Chase may suit an agency that wants branches and cash handling. Its Business Complete Banking account has a $15 monthly fee that may be waivable; online domestic wires are listed at $25, and the account includes up to 20 certain paper/teller transactions per statement cycle. ⁹¹¹

My starting point: compare Mercury and Relay for an online agency, or Chase if branch access matters—but get written confirmation that the bank accepts your specific practice of receiving and disbursing client ad budgets. Fees and terms can change, so verify the current fee schedule directly with each provider before deciding.