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Stax by Fattmerchant Review | SmallBizGenius

ByDamjan Jugovic Spajic
July 11,2022
We form affiliate partnerships with some of the companies mentioned in our reviews, which means we may get a small monetary compensation every time you purchase a product using the links on our website. This does not influence the contents of our reviews. Learn more by reading our Affiliate disclosure.

Product Overview

Stax, formerly known as Fattmerchant, is a unique credit card processor. It bundles together several services for a single monthly subscription intended for small and large businesses, as well as SaaS platforms. The company applies a transparent pricing model, but that’s not the only reason for its popularity. 

The good news is that Stax doesn’t have percentage markup rates. Instead, it offers fixed wholesale transaction rates and subscription-based plans. While conducting research for this Stax by Fattmerchant review, we found that this combination of subscription-based pricing and month-to-month billing makes the provider highly appealing.


Detailed pricing information below.

pros thumb up Pros
  • Straightforward pricing for small and medium businesses
  • No percentage markup rate
  • Price scales with transaction volume
  • Month-to-month billing with no long-term contracts
  • No cancellation fees
  • No additional costs for online shopping carts/virtual terminals
cons thumb down Cons
  • Non-transparent pricing for larger businesses

Pricing Structure

Stax offers transparent pricing plans with straightforward costs and features. This is an advantage shared by most subscription-based processors because you don’t have to calculate or negotiate markup percentages. Stax scales with transaction volume, which means you are not at risk of overpaying. 

Pricing plans on Stax differ according to maximum transaction volume thresholds. Instead of markup fees, your cost comprises a monthly membership fee, interchange fees for every transaction, and fixed transaction fees. There are variations in Stax or Fattmerchant fees because of different transaction volume limits in individual plans, but this excellent solution comes with no surcharge fees. 

Most of the core features you’ll need are included, regardless of the package you choose. However, there is an extra cost for some upgrades. There are three pricing categories: for businesses processing up to $500,000 annually; those processing more than $5 million; while the third plan is reserved for SaaS platforms. Unfortunately, no pricing tiers are displayed for SaaS platforms, so you’d have to schedule a call with this credit card processor’s team to get a custom quote based on your needs.

Pricing Plans

Let’s take a look at Stax’s pricing for small businesses, which is rather clear-cut, and is divided into three tiers. The first tier, called Growth, starts at $99 per month. Within this tier, you can count on several features, including one free terminal or mobile reader. You also get ACH processing, free surcharging capabilities, and a lite version of its dashboard and analytics. Lastly, it also includes quick payment and backup processing.

The second tier on the Stax by Fattmerchant pricing list is Pro, which starts at $159 per month. This plan includes everything from Growth, but also adds more features into the mix. With Pro plan, you also get digital invoicing, Text2Pay mobile payments, and website payment links. 

The Pro plan also allows you to store customer credit cards on file for future use and adds API key integration capabilities. You can also rely on accounting sync with QuickBooks Online, and this tier also unlocks the enhanced version of the dashboard and analytics. 

The final tier, Ultimate, starts at $199 per month and includes everything from Growth and Pro. Additional features unlocked by the Ultimate plan with this credit card processing provider include recurring invoices and scheduled payments, automatic updates for the credit cards you have stored, and access to premier support. 

With this tier, you can also rely on an advanced version of dashboards and reporting, and you will also be able to export data. Lastly, eCommerce owners will probably appreciate the ability to set up shopping carts with a single click, which comes with catalog management. 

Unfortunately, larger businesses that process over $5 million annually and SaaS platforms that need an easier way to accept payments won’t be able to obtain pricing information on the website. While Stax’s offer is among the best credit card processing for a small business, larger companies will have to get in touch with its customer representatives for a custom quote. 


When it comes to the features provided by Stax by Fattmerchant, the list is impressive and can be divided into a couple of segments. So, let’s discuss in detail what Stax has to offer.


The first on the long list of features is invoicing, which Stax has made quite simple. You can effortlessly create invoices through a drag-and-drop builder and email or text them to your customers. You can also easily create and schedule recurring billing and track Stax payments you receive from both desktop and mobile. To ensure you’ll get paid, you can set up automated invoice reminders to let your customers know the invoices are due. 

Apart from allowing you to handle the paperwork much more easily, you can also streamline the payment process as well. It will allow you to store customer information and payment preferences. You can also use this platform to enhance business performance through reporting as you track invoice payments or observe sales trends.

Useful integrations will also help you take your business operation to the next level. You can rely on QuickBooks integration to sync unpaid and paid invoices easily. Moreover, you can opt for Zapier and webhooks for other useful integrations with Stax credit card processing and find additional ways to streamline the process.

Accepting Payments in Person

Even if your business relies on in-person payments, you can still upgrade it using Stax. It will effortlessly turn favourite point-of-sale systems into smart cloud terminals. This covers both countertop terminals and mobile payments. Regardless of how your customers pay you, this feature will allow you to accept payments quickly.

For example, with Stax, your new terminal can allow your customers to pay by swiping, tapping, or dipping, or through Apple Pay and Google Pay. You can also use your smartphone to accept payments by scanning your customers’ cards. Either way, all payments end up in the same Stax payment dashboard so you can have a clear overview. 

ECommerce Solutions

In line with streamlining the payments, Stax also offers excellent features for eCommerce store owners that can help simplify how they are getting paid for their services or products. This solution allows you to create a shopping cart and add it to the site with a couple of clicks or use a pre-built shopping cart on your website. 

From there, you can integrate it with payment processing tools and enjoy the benefits of easy-to-use merchant services for small businesses. These will also become a part of your analytics and reports, including inventory management so you can keep track of your inventory and payments. With its excellent reporting, you’ll easily find ways to improve your operations. 

No Surcharge

Probably the most tempting feature from the Stax offer is that it helps you increase your revenue by letting you off the hook for surcharges. It allows you to do this by adding the surcharge fees to your customers’ credit cards and eliminates the dent these fees make in your revenue. If your customers want to avoid these fees, they can switch to debit card payments, which are free of surcharges.

Exceptional Security

If you are worried about Stax by Fattmerchant security, you’ll be happy to know that this payment processor adheres to PCI standards and encrypts all data. Moreover, it complies with all the relevant laws and regulations that pertain to this industry. 

Ease of Use and Customer Support

For this Stax by Fattmerchant review, we found that setting up an account is quick and easy. You can complete the setup process through an online form or by contacting a sales representative who will provide an analysis of how much you’ll be saving by using Stax and send you a quote.

While setup times can vary, in most cases the process is pretty quick. If you encounter any obstacles, you can check the extensive FAQ section to find your solution. You can also reach out to its customer support team, which is available via mail, phone, live chat, and even fax! 

According to customer reviews of Fattmerchant and our observations, the agents are more than happy to answer any questions, whether you’re a customer or intend to become one. The support staff is knowledgeable and is located in-house, ensuring prompt responses.

Contract Length and Termination Conditions

Most payment processors tie you down to long-term contracts and have steep cancellation fees. But Stax by Fattmerchant has adopted a more user-friendly approach. Don’t worry, your merchant account will still be covered by a contract. Nevertheless, the billing is on a monthly basis, and there are no longstanding contracts. 

There are no cancellation fees, which can carry significant weight when it comes to credit card merchant fees comparison. If you decide to close your account, Stax will continue processing your payments until the end of that month, and you’ll pay the transaction fees solely for the transactions they’ve processed. 


To make things even more convenient in your day-to-day business operation, Stax has integrations with various software. The objective is to help connect your existing processes and workflows while minimizing the need for a back-and-forth between apps.

At the moment, Stax is one of the rare credit card merchants that integrates seamlessly with Slack to improve communication. You can also connect it to MS Teams for simpler workflows, or integrate with QuickBooks and Xero. Moreover, you can link it to Zoho, Mailchimp, HubSpot, Calendly, and Facebook Ads, for easier correspondence with your customers. 

It’s also possible to connect it to the task management software of your choice, including Asana, Atlassian, Wrike, Workona, and Most importantly, during our Fattmerchant review, we found that there is no additional charge for these integration services.

BBB Rating

Stax, or Fattmerchant, currently has an A+ rating with the Better Business Bureau. Although the company has been in business for quite some time, it was accredited by the BBB just two years ago. There are many stellar Fattmerchant reviews on BBB, but they were shared two years ago, whereas recent ones indicate some dissatisfaction with its service.

When it comes to the negative reviews, most relate to charges that appeared after the service was terminated and transactions that were deemed fraudulent. It should be underscored, though, that most post-cancellation charges resulted from minor errors. 

Importantly, the complaints were settled and the parties refunded. The allegations of fraudulent transactions had nothing to do with the processor itself. However, customers often erroneously complain to payment processors instead of banks.


Our overall impression of Stax by Fattmerchant is positive, mostly owing to one of the lowest credit card processing fees on the market. It is a fantastic choice for businesses looking for a trusted credit card processor, thanks to its straightforward pricing, month-to-month billing, and the absence of markup fees. All in all, we are confident in recommending Stax. Our Stax by Fattmerchant review experience, coupled with positive customer reviews, affirm that this is a trusted operator.

Similar products / software

How much does Fattmerchant cost?

Stax pricing plans are mostly based on your transaction volume and any additional terminals or features you choose. The prices start at $99/month for up to $500,000 in transaction volume.

What is the best credit card processing provider for small businesses?

Determining which processor is best for your business depends on your desired features and on your transaction volume. Usually, customers have difficulty choosing sides in the Stax by Fattmerchant vs. Square duel, as these two are the most popular solutions for credit card processing. However, if your primary requirement is that the provider has low fixed transaction rates, we suggest going with either Stax or Payment Depot.

What is the cheapest credit card processing company?

Some of the cheapest credit card processors are Stax, Square, Payment Depot, and National Processing. Again, this will depend on the volume of your company’s transactions.

What is the best way to accept credit cards?

Your business should strive to accept credit cards in person (keyed and swiped), through the mobile reader, and online.

What is the average credit card processing fee?

Credit card processing fees are 1.5%-3.5% depending on whether the transaction is swiped or keyed, the latter being pricier. Every positive Stax by Fattmerchant review notes that the provider doesn’t charge a markup percentage. Instead, it charges fixed monthly fees and per-transaction fees, an approach that businesses certainly appreciate.