B2B Payment Processing Guide 2026: Best Merchant Accounts for Wholesale, Distribution, and Professional Services

Not all B2B companies will need the same features.

Wholesale and Distribution

Wholesalers and distributors will likely require ACH, commercial cards, credit limits, purchase order data, partial payments, and integration with their existing ERP software.

They should be able to track the number of orders from each customer and the size of each order. A very large order from a single customer could potentially require a review of the current credit limit.

Professional Services

Professional services firms will require invoice-based payments, ACH payments, card payments, payment links for recurring payments, and retainers.

The primary concern for these companies will be paying their customers from the invoice and linking the payment to the engagement or project mentioned in the invoice.

Manufacturers and Commercial Suppliers

Manufacturers will likely require deposits, progress payments, final payments, and high-value commercial card transactions.

These companies may have high-ticket sales that require underwriting. The limits requested for the monthly limit and maximum ticket size should reflect the sales contracts between the supplier and the manufacturer.

Not every product in this market serves the same role. Some providers supply merchant accounts, while others focus on accounts receivable software, accounting integration, or gateway technology.

Payment Nerds may be a practical fit when the company needs help configuring the merchant account, gateway and software together. BILL or QuickBooks may be more attractive when the main priority is automating accounts receivable inside an existing finance ecosystem.

B2B payment costs relate to the payment rail used, the invoice value, the card type, and data quality for the processor, the payment gateway, and the provider.

For ACH payments, the higher the invoice value, the more attractive it can be, since card costs are usually percentage-based. Cards can still be used for faster collection or convenience rather than the acceptance of commercial cards with working capital.

When comparing B2B payment processors, ask about the fees for:

• ACH debit and credit fees
• Same Day ACH pricing
• card markup and pricing model
• commercial-card data support
• gateway and virtual-terminal fees
• monthly minimums
• account-validation costs
• return and chargeback fees
• batch or settlement fees
• integration costs
• maximum ticket and monthly volume limits
• contract and termination terms

Do not base the evaluation of payment processors on the advertised cost of one payment rail. A company that can support commercial-card data and move invoices to ACH may offer a better total cost to the business than one with a lower markup on the cards.

A B2B merchant account is underwritten according to the business’ typical and maximum transaction amounts, transaction volume, business model and fulfillment timeline. Any sales outside of these expectations may trigger a review of the merchant’s funding terms.

Before the business launches, it is important to disclose to the merchant banking department:

• typical and maximum invoice amounts
• expected card and ACH transaction volumes
• seasonal and month-end sales volumes
• net terms with customers
• deposit and milestone terms with customers
• presence of international customers
• commercial and government card sales
• expected portfolio and sales growth
• common refund practices
• fulfillment timelines

These sales and fulfillment records should be maintained by the business. This information will be important to share with the merchant banking department prior to the initiation of new customers and contracts that may lead to a major increase in sales volume.

While fewer consumer ecommerce businesses may encounter disputes from their customers, they are not immune to fraud.

Businesses can prevent fraud by confirming changes to bank details through channels other than the bank being contacted, using approval workflows based on the role of the individual making the purchase, and monitoring business purchases. Additionally, the form for entering payment cards should include appropriate security measures, such as AVS and CVV, to protect against fraudulent purchases.

The Visa Acquirer Monitoring Program (VAMP) is a program that combines the monitoring of fraud and non-fraud disputes for merchants. The VAMP ratio is calculated as the number of fraud and dispute transactions (TC40) and non-fraud transactions (TC15) relative to the total number of settled transactions with Visa.

VAMP applies to businesses whose customers purchase products online with a card, through a payment link, or through a virtual terminal. While ACH transactions are outside of VAMP, the returns of ACH transactions and claims for unauthorized purchases by merchants may still impact the accounts of those merchants.

The first mistake is to send every invoice through the same payment rail. A $400 consulting invoice might be best sent to a card company, while a $40,000 order of wholesale goods might be better via ACH.

The second mistake is choosing software to manage the business’s invoices without considering whether it is compatible with the merchant’s account.

The third mistake is to separate the data that tracks payments made to the business from the invoice data. Payments that cannot be linked to the customer and the invoice create difficulties for the business in the accounting and billing cycle.

Finally, the last mistake to avoid is waiting until a business reaches its processing limit on its merchant account before contacting the provider to adjust it. Providing advance notice allows the merchant account’s underwriters to review the business and its contracts and adjust the limit as appropriate.