Flat-rate Payment Processing With 
0% Markup

Simple transparent pricing that could save you up to 40%

Other payment processors take a percentage of every transaction and add fees.

Trusted by over 
12,000 customers nationwide.

Get a Free Savings Analysis And Find Out How Much You Could Be Saving.

We value your privacy and will not spam you or share information.

We provide businesses with the payment solutions they need to take transactions how they want and where they want.


Pre-programmed EMV terminals to accept chip cards and Apple/Samsung Pay. Perfect for retail locations and brick-and-mortar stores.

Online Payments

Send invoices, tokenize and store customer information, set up recurring billing and more. Perfect for service businesses.

Shopping Carts

Quickly and easily set up an online shopping cart for your e-commerce store. We can even integrate into your existing one.


Integrate into your existing hardware and software. That means you keep processing just as you always have.

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How Stax by Fattmerchant works

Learn where your savings come from by watching this short video.

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With Stax You Get:

0% Markup

No Hidden Fees

No Contract 

24/7 Customer Support

Stax Business Analytics

See why thousands of businesses have switched to Stax by Fattmerchant.

"I said to our clients that Fattmerchant really worked with us to find a product set that fits our needs. What I like about Fattmerchant is that they match our business model, which is really to meet our client's need individually. 

- Jeffery May, CPA

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