Payment Processing for AI SaaS Companies | Stripe Alternative

Learn what merchant service charges include, how processing fees are calculated, which fees may be negotiable, and how your business can reduce payment costs.

Presented by Allen Kopelman, CEO — Nationwide Payment Systems-Host of B2B Vault: The Biz2Biz Podcast

AI OVERVIEW

Merchant processing fees encompass interchange, card-network assessments, processor markup, and additional account or technology charges. While many processors advertise low promotional rates, a business's true expense is determined by its effective rate, which divides total fees by total processing volume. Common pricing structures include flat-rate, interchange-plus, tiered, subscription, and surcharge or dual-pricing models, each carrying distinct advantages depending on transaction size and card mix. Business owners can lower overall costs by optimizing B2B card data, leveraging ACH for larger invoices, maintaining strict PCI compliance, and negotiating processor markups. Platforms like NPSONE from Nationwide Payment Systems provide statement audits and flexible payment technologies to help merchants eliminate hidden fees and streamline operations.

What are your Merchant Account Fees? The Business Owner’s Guide to Payment Processing Fees

A merchant service charge is the total cost a business pays to accept electronic payments, including credit cards, debit cards, mobile wallets, online payments, and other payment methods.

The charge may include interchange, card-network assessments, processor markup, authorization fees, gateway fees, monthly account charges, PCI-related fees, equipment costs, and other expenses associated with operating a merchant account.

The problem is that many business owners are shown one advertised rate without being told what their total processing cost will actually be.

A processor may advertise a low rate, but the business later discovers additional transaction fees, monthly fees, non-qualified charges, gateway fees, PCI noncompliance fees, annual fees, or expensive flat-rate pricing.

Understanding merchant service charges gives business owners the information they need to compare providers, identify unnecessary fees, negotiate better pricing, and choose the right payment technology.

What are all the merchant account fees on your statement?

A merchant service charge is the amount deducted from a transaction or charged to a business for processing an electronic payment.

When a customer taps, inserts, swipes, or enters a card, several organizations participate in moving the money:

The customer’s issuing bank

The merchant’s acquiring bank

The card network

The payment processor

The payment gateway or point-of-sale platform

The merchant service charge pays for the technology, banking infrastructure, authorization, settlement, security, fraud controls, customer support, and other services required to complete the transaction.

Although a statement may make the cost look like one fee, it is typically made up of several components.

Visa explains that interchange reimbursement fees are transfer fees between financial institutions. Merchants generally negotiate and pay a merchant discount to their financial institution for card-acceptance services.

What Are the Main Parts of a Merchant Account Statement?

A merchant service charge generally includes interchange, card-network fees, processor markup, and account-level service fees.

Understanding each category is important because some costs are established by the payment networks, while others are determined by the processor and may be negotiable.

Interchange fees

Interchange is the largest underlying component of many card-processing transactions.

It is generally paid by the acquiring side of the transaction to the bank that issued the customer’s card. Interchange varies based on factors such as:

Credit card versus debit card

Consumer card versus commercial card

Basic card versus rewards card

Card-present versus card-not-present

Business industry

Transaction size

Authorization method

Data submitted with the transaction

Whether the transaction qualifies for a special program

Visa and Mastercard publish interchange schedules, but the number of categories can make them difficult for a business owner to interpret. Mastercard describes interchange as one component of the merchant discount rate established by the acquirer.

Interchange is not normally a single universal percentage. One transaction may qualify for a low regulated-debit cost, while another may involve a premium rewards card with a considerably higher cost.

Card-network assessment fees

Card-network fees are charged by payment brands such as Visa, Mastercard, Discover, and American Express.

These may include percentage-based assessments, fixed transaction charges, cross-border fees, network access fees, and other card-brand costs.

Like interchange, these costs are generally not controlled by an individual merchant service provider.

Processor markup

Processor markup is the amount added by the merchant service provider, acquiring organization, payment facilitator, or processing platform.

This is one of the most important areas to review because processor markup can vary substantially between providers.

Markup may be structured as:

A percentage above cost

A per-transaction fee

A monthly platform fee

A gateway charge

An authorization fee

A statement fee

A batch fee

A monthly minimum

A combination of several charges

Unlike published card-brand costs, processor markup may be negotiable.

Account and technology fees

Businesses may also pay for the additional products and services connected to their merchant account.

These charges can include:

Payment gateway fees

Virtual terminal fees

Point-of-sale software

Equipment leasing or rental

Recurring billing

Tokenization

ACH processing

Chargeback alerts

Fraud-prevention services

PCI compliance programs

Mobile payment capabilities

Accounting integrations

Customer invoicing tools

These services can provide real value, but businesses should know what they are receiving and whether the price makes sense.

How Are Merchant Account fees Calculated?

Merchant service charges are typically calculated using a percentage of the transaction, a fixed per-item charge, a monthly fee, or a combination of all three.

For example, a processor might charge:

2.90% plus $0.30 per transaction

On a $100 transaction, the processing fee would be:

Percentage fee: $2.90

Transaction fee: $0.30

Total fee: $3.20

The business would receive approximately $96.80 before considering any other account fees.

That calculation looks simple, but it may not reflect the processor’s actual underlying cost.

A debit transaction may cost substantially less to process than a premium rewards credit card. Under flat-rate pricing, however, the business could be charged the same 2.90% plus $0.30 regardless of the underlying card cost.

For a new or very small business, that simplicity may be convenient. For a company processing $25,000, $50,000, or significantly more each month, the difference can become expensive.

What Is Your Effective Processing Rate?

Your effective processing rate is the percentage of your card sales that was consumed by processing fees.

Calculate it using this formula:

Total processing fees ÷ total processing volume × 100

Suppose a business processed $100,000 and paid $3,400 in total processing fees:

$3,400 ÷ $100,000 = 3.40%

The effective rate is 3.40%.

This number is often more useful than the rate shown in a sales proposal.

A processor may advertise a rate of 1.59%, but the business could have an effective rate above 3% after interchange, transaction fees, downgrades, monthly charges, gateway costs, and other expenses are included.

Business owners should examine at least three months of statements because card mix, seasonal sales, transaction size, and monthly fees can cause the effective rate to fluctuate.

What Payment Processing Pricing Models Are Available?

The most common payment-processing pricing models are flat-rate, interchange-plus, tiered, subscription, dual pricing, and credit card surcharge programs.

The right model depends on the business’s volume, average ticket, industry, payment methods, and customer experience.

What Is Flat-Rate Payment Processing?

Flat-rate pricing charges one bundled rate for many or all transactions.

Providers such as Stripe, Square, PayPal, and some software platforms commonly use versions of flat-rate pricing.

A typical flat-rate offer may look like:

2.6% plus $0.10

2.9% plus $0.30

3.49% plus a transaction fee for manually entered payments

Flat-rate pricing is easy to understand and can be convenient for businesses with low or unpredictable volume.

The disadvantage is that the processor keeps the difference when the underlying transaction costs less than the flat rate.

This can be especially significant for:

Debit-card-heavy businesses

High-volume merchants

Businesses with large average tickets

B2B companies

Medical offices

Professional services

Wholesalers and distributors

Companies collecting invoices

Flat-rate pricing can also make it difficult to determine how much processor markup is built into the charge.

What Is Interchange-Plus Pricing?

Interchange-plus pricing separates the underlying card cost from the processor’s markup.

The statement may show:

Interchange and network costs + 0.25% + $0.10 per transaction

This structure gives the business greater transparency because lower-cost cards receive lower underlying rates while higher-cost cards are charged according to their actual category.

Interchange-plus pricing can be a strong fit for:

Established businesses

Companies processing $25,000 or more per month

High-volume merchants

Businesses with significant debit-card volume

Retailers

Restaurants

Healthcare offices

B2B suppliers

E-commerce companies

Businesses that want to audit their fees

Not every interchange-plus proposal is automatically inexpensive. The processor’s markup and additional fees still need to be reviewed.

What Is Tiered Pricing?

Tiered pricing groups transactions into categories such as qualified, mid-qualified, and non-qualified.

The processor determines which transactions qualify for each category.

A business may be shown an attractive qualified rate, but many transactions could fall into more expensive mid-qualified or non-qualified tiers.

Transactions may be downgraded because of:

Rewards cards

Business cards

Manually entered card information

Missing transaction data

Delayed settlement

Card-not-present activity

Recurring payments

Industry-specific qualification rules

Tiered pricing can make statements difficult to audit because the business may not see the actual interchange cost or processor margin.

What Is Subscription-Based Payment Processing?

Subscription pricing typically charges a monthly membership or platform fee plus interchange and a fixed transaction charge.

This model can work for some high-volume merchants, but business owners should examine the entire agreement.

Questions to ask include:

Is there an additional percentage markup?

Are there monthly volume limits?

Does the subscription price increase by volume?

Are gateway fees included?

Are there separate authorization fees?

Is equipment included?

Are there annual or compliance fees?

What happens if the account is closed?

The word “subscription” does not automatically mean the pricing is lower.

Can a Business Pass Merchant Service Charges to Customers?

Businesses may be able to offset payment costs through a properly structured credit card surcharge, dual pricing, cash discount, convenience fee, or service-fee program.

However, these programs are not interchangeable.

Credit card surcharge

A surcharge is an additional fee applied when a customer chooses to pay with an eligible credit card.

Surcharges generally cannot be applied to debit-card transactions, including when a debit card is run without a PIN.

Businesses must follow applicable card-brand rules, disclosure requirements, registration procedures, signage requirements, receipt requirements, and state laws.

Mastercard permits qualifying U.S. merchants to surcharge certain credit card transactions when its requirements and applicable state laws are followed.

** Check your States laws

Dual pricing

Dual pricing presents customers with a card price and a lower cash price.

A correctly configured program should clearly display both prices before the customer pays.

Dual pricing is commonly used by:

Restaurants

Retail stores

Automotive businesses

Service companies

Convenience stores

Professional offices

The program must be configured and disclosed properly. Simply adding a fee at the register and calling it a cash discount may create compliance problems.

Convenience fee

A convenience fee may be permitted in specific circumstances when a customer uses an alternative payment channel that is different from the merchant’s customary payment method.

Convenience fees have their own rules and should not be treated as a generic way to charge every card customer.

Service or platform fees

Calling a charge a “service fee,” “technology fee,” “assistance fee,” or “platform fee” does not automatically exempt it from card-brand requirements.

Processors and card networks look at how the fee operates—not just what the business calls it.

Nationwide Payment Systems can help businesses evaluate which cost-recovery model is appropriate for their industry and payment environment.

Why Are Debit Card Processing Costs Important?

Debit-card transactions can have much lower underlying costs than many consumer credit card transactions, especially when the card is issued by a regulated financial institution.

Visa’s published U.S. interchange schedule includes regulated debit categories with costs expressed as a small percentage plus a fixed amount, depending on the applicable program and transaction type.

A flat-rate provider may still charge the business its standard bundled rate.

For example, a provider charging 2.9% plus $0.30 would collect $3.20 on a $100 transaction.

When the underlying card is a lower-cost debit product, much of that amount may represent provider margin rather than card cost.

This is why businesses with substantial debit volume should not compare processors using only an advertised percentage. They should review the card mix and calculate the total annual cost.

Why Do B2B Companies Sometimes Pay More Than Necessary?

B2B companies may overpay when commercial card transactions are processed without the enhanced data needed to qualify for available business-card programs.

Business, corporate, purchasing, and government cards may benefit from additional transaction information commonly called Level 2 or Level 3 data.

That information can include:

Customer code

Invoice number

Tax amount

Purchase order number

Product description

Item quantity

Unit cost

Freight amount

Destination ZIP code

Submitting enhanced data does not guarantee that every transaction will qualify for a lower cost, but the absence of required data can prevent eligible transactions from receiving more favorable treatment.

NPSONE Smart Invoicing can support B2B payment workflows by combining invoicing, card acceptance, ACH, payment links, recurring billing, and enhanced transaction-data capabilities within one platform.

This can be particularly valuable for:

Wholesalers

Distributors

Manufacturers

Staffing companies

Professional services

Commercial contractors

Medical suppliers

Business consultants

Transportation and logistics companies

How Can ACH Reduce Merchant Service Charges?

ACH payments can reduce costs for invoices and larger transactions because ACH is not priced like a traditional credit card transaction.

Instead of charging a percentage that increases with the transaction amount, some ACH programs use a fixed fee, a lower percentage, or a capped cost.

ACH can be useful for:

Recurring invoices

Rent and property payments

Memberships

Professional services

B2B receivables

Large-ticket payments

Monthly service agreements

Deposits

Payment plans

ACH is not appropriate for every customer or every transaction. Businesses also need tools to manage returned payments, invalid accounts, unauthorized returns, and account verification.

NPSONE Smart Invoicing allows businesses to offer both cards and ACH so customers can select an available payment method while the business manages collections through one invoicing platform.

What Other Merchant Account Fees Should Businesses Review?

Business owners should review every charge on their processing statement, not just the advertised transaction rate.

Common charges may include:

Monthly account fee

Statement fee

Gateway fee

Authorization fee

Batch fee

PCI compliance fee

PCI noncompliance fee

Annual fee

Monthly minimum

AVS fee

Voice authorization fee

Chargeback fee

Retrieval fee

Account updater fee

Tokenization fee

Cross-border fee

International card fee

Early termination fee

Equipment lease

Software fee

Wireless connectivity fee

Next-day funding fee

Some fees pay for useful services. Others may be excessive, duplicated, poorly disclosed, or no longer relevant to the business.

A merchant statement review should determine:

What each fee is.
Who charges it.
Whether it is fixed or negotiable.
Whether the business uses the related service.
Whether the charge matches the agreement.
Whether another pricing structure would be more economical.

Why Is PCI Compliance Important?

PCI compliance helps businesses protect payment-card information and may also help them avoid PCI noncompliance fees imposed through their merchant-services program.

PCI DSS provides technical and operational security requirements intended to protect payment-account data. Its scope includes organizations that store, process, transmit, or can affect the security of cardholder data.

Small businesses are not automatically exempt because of their size or low transaction volume. The PCI Security Standards Council states that PCI DSS is intended for merchants regardless of size, although smaller merchants may have simpler environments.

Even when a business outsources payment processing and does not directly store card data, it may still have responsibilities involving service-provider oversight and compliance validation.

Business owners should:

Complete the appropriate Self-Assessment Questionnaire.

Use PCI-compliant terminals and payment applications.

Avoid storing unencrypted card data.

Maintain strong passwords and access controls.

Install security updates.

Restrict access to payment systems.

Confirm third-party providers’ responsibilities.

Complete required vulnerability scans when applicable.

Renew compliance validation as required.

Failing to complete the required process may result in avoidable monthly noncompliance charges and increased exposure to data-security incidents.

Today many insurance companies are asking business owners for their PCI Compliance certification if they are doing any business online.

How Can Businesses Lower Merchant Account Fees?

Businesses can lower merchant service charges by reviewing their statements, choosing the right pricing model, improving transaction qualification, using lower-cost payment methods, maintaining PCI compliance, and eliminating unnecessary fees.

Calculate your effective rate

Divide total monthly fees by total processing volume.

Do not rely exclusively on the processor’s advertised rate.

Review at least three months of statements

A single month may not reveal recurring quarterly, annual, seasonal, or volume-related charges.

Compare flat-rate pricing with cost-plus pricing

As payment volume grows, interchange-plus or another customized pricing structure may provide better economics.

Examine debit-card volume

Businesses with a high percentage of debit transactions may be overpaying under a bundled flat-rate program.

Add ACH for invoices

ACH can give customers another way to pay while helping the business reduce costs on appropriate transactions.

Optimize B2B transactions

Commercial-card transactions should be evaluated for Level 2 and Level 3 data opportunities.

Complete PCI compliance

Do not allow an unfinished questionnaire or scan to create recurring noncompliance fees.

Settle transactions on time

Late settlement can affect transaction qualification and may increase costs.

Use current payment technology

EMV terminals, contactless payments, tokenization, hosted payment pages, fraud controls, and secure invoicing can improve both security and transaction quality.

Review chargebacks and fraud

Chargebacks create direct fees, lost revenue, staff time, and potential account-monitoring problems.

Businesses should use clear billing descriptors, signed documentation, delivery confirmation, refund policies, AVS, CVV, EMV, fraud filters, and chargeback-alert services where appropriate.

Negotiate processor markup

Interchange and card-network costs are generally established outside the processor, but processor markup and certain account fees may be negotiable.

How Does NPSONE Help Businesses Manage Payment Costs?

NPSONE gives businesses a flexible payment platform for accepting cards, ACH, digital wallets, online payments, recurring payments, and invoice payments.

Rather than forcing every merchant into one payment model, Nationwide Payment Systems can configure solutions around the company’s industry, transaction volume, payment channels, accounting workflow, and customer base.

NPSONE and NPSONE Smart Invoicing can provide capabilities such as:

Credit and debit card processing

ACH payments

Email and text payment links

Smart digital invoices

Deposits and partial payments

Recurring billing

Apple Pay and Google Pay

Hosted payment pages

Virtual terminal

Multiple users

Electronic signatures

Tips

QuickBooks integration options

Level 2 and Level 3 transaction data

API and webhook connectivity

E-commerce integrations

Fraud-management tools

Customized pricing programs

Businesses can also work with a real payment professional who can review statements, explain fees, and recommend changes based on actual transaction data.

Why Should Businesses Choose Nationwide Payment Systems?

Nationwide Payment Systems combines payment technology with direct, relationship-based support.

Many processors provide an online signup form and a generic support queue. Nationwide Payment Systems takes a consultative approach.

We help business owners evaluate:

Total payment-processing costs

Flat-rate versus interchange-plus pricing

Debit-card expenses

B2B card optimization

ACH acceptance

Dual pricing and surcharge options

Point-of-sale systems

E-commerce payments

Smart invoicing

QuickBooks payment workflows

Fraud and chargeback prevention

High-risk merchant account placement

Gateway and software integrations

The goal is not simply to quote a lower rate. The goal is to build a payment solution that supports the way the business operates today and where it plans to grow next.

Is Your Business Paying Too Much for Merchant Services?

Your business may be paying too much if your effective rate has increased, your statement contains unexplained fees, your debit transactions are charged at expensive flat rates, or your processor cannot clearly explain its markup.

Warning signs include: