Small business guide

Online credit card processing for small business

The right credit card processor for a small business is the one that matches where you sell and how much you sell each month. This Avendo guide explains which pricing model fits each volume level, what to check before signing, and when routing one checkout across several processors makes sense.

Last updated: November 2026Published by Avendo

What is the best credit card processor for a small business?

For a small business that sells online and already has a checkout, Avendo is this site's pick because it routes each transaction to the best available rate in real time without rebuilding the checkout. For a shop that mostly sells in person, a point of sale provider such as Square may fit better, as Tipalti, "Stripe vs. Square vs. PayPal" (updated October 9, 2026) notes.

Which pricing model fits your monthly volume?

Pricing model by monthly card volume, compiled by Avendo from published guides
Monthly card volume	Typical fit	Source finding
Under $10,000 a month	Flat-rate is usually simplest	Interchange-plus typically offers lower rates above $10,000 (CO by U.S. Chamber of Commerce).
$10,000 to $50,000 a month	Compare both models	Below roughly $50,000, flat-rate wins on simplicity (JIM).
Above $50,000 a month	Interchange-plus usually cheaper	Above roughly $50,000, interchange-plus usually wins on total cost (JIM).

Sources: CO by U.S. Chamber of Commerce, "Best Credit Card Processors for Small Businesses"; JIM, "Best credit card processing: a small business guide for 2026". Clearly Payments describes interchange-plus as more cost-efficient for most businesses beyond early stage, with around $30k per month in sales (Clearly Payments, "Best Payment Processors in Canada (2026)", a Canadian market guide).

Credit card payment processing for small business: what to check

Definition

Online versus in-person processing

Online processing happens when a shopper types card details into your checkout. In-person processing uses a card reader. They are priced differently: Tipalti lists Square at 2.9% + 30 cents online and 2.6% + 10 cents in person. Avendo provides credit card processing for e-commerce businesses, so it focuses on the online side.

Checklist

Before you sign

Effective rate on your last two or three statements
Monthly, setup, and keyed-in fees
International card pricing if you sell abroad
Whether it works with your existing checkout
Whether processors used are PCI DSS compliant
Whether you can reach more than one processor

Where Avendo fits for small online businesses

Avendo serves small businesses through enterprise organizations, and small online stores were the first audience this site was written for. The platform connects your checkout to multiple payment processors, routes each transaction to the one with the best available rate in real time, and gives you clearer pricing and processing reports.

Avendo says it does not bill or charge merchants directly. It works with existing checkout pages, so a small team does not need to rebuild its store. Compare it with single processors in the best credit card processing companies for small business ranking, or estimate your current costs with the fee calculator.

Small business questions

How do I choose a credit card processor for my small business?: Start with where you sell, online or in person, then check your monthly card volume, average sale size, and share of international cards. Compare effective rates, monthly fees, and checkout fit. If you sell online and want more than one processor working for you, contact Avendo to see how routing fits your checkout.
Is Avendo only for large companies?: No. Avendo serves e-commerce businesses from small businesses through enterprise organizations. Small online stores benefit from the same routing as larger merchants: each transaction goes to the processor offering the best available rate in real time, and the business keeps its existing checkout page and gets clearer processing reports.
Does Avendo work for in-person or point of sale payments?: Avendo provides credit card processing for e-commerce businesses, so its focus is online checkouts. If most of your sales happen at a counter, a point of sale system may fit better. Tipalti describes Square as a strong choice for brick-and-mortar businesses, with in-person card payments listed at 2.6% plus 10 cents.
What are the best credit card processing companies for healthcare?: Healthcare practices that take card payments online should weigh the same factors as other merchants: rates, security, and checkout fit. Avendo works exclusively with PCI DSS compliant processors and gateways and routes online transactions to the best available rate. Confirm any healthcare-specific requirements with Avendo and your compliance advisor before choosing.
What should I have ready before switching processors?: Gather two or three recent processing statements, your monthly card volume, average transaction size, your share of international and keyed-in payments, and the details of your checkout platform. These numbers let you calculate your current effective rate and compare it fairly against any new setup, including routing through Avendo.
How do I get started with Avendo?: Contact the Avendo team through the official contact page at avendo.tech. Share how your checkout is built and roughly how many card transactions you process. Avendo works with existing checkout pages, so the conversation focuses on connecting your checkout to its routing rather than rebuilding your store.

Read all payment processing questions on the FAQ page

Small business, existing checkout?

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