Key criteria when choosing a payment system

[Deglas]

Geography of the payment system – make sure that the payment system works in the countries from which you want to serve customers.
Percentage on transactions. Find out how much the system will take from each money transaction and take this into account when pricing. Read the documentation carefully to notice the hidden fee in time. For example, a bank may not indicate tariffs for making a card payment and assign a commission individually.
Withdrawal conditions. The first step is to make sure that it is generally possible to cash out funds in your area. For example, it will not be possible to cash out with PayPal now in Ukraine. Everyone has their own policy, and there may be pitfalls.
Is the logic of the payment system an aggregator or a direct payment gateway? It depends on how the user will pay and where you will subsequently withdraw money from.
Technical connection conditions – they directly depend on the platform on which your site is being developed. Whether the system works as a plugin, through an open API, or in a different way. For example, if the site is developed on the WordPress constructor, you will be able to connect the plugin yourself. If the site is self-written, even on the same WordPress, then you need to work through the code.

[Arvando]

Hello, payment processing is probably the most intimidating part of the whole "online selling" puzzle when you're just getting started. And this is quite understandable. After all, that's part of the job - since you're launching a new online store - where you start working with your customers' financial information like credit card numbers, sensitive personal details, etc. And as an eCommerce store owner, you're in charge of responsibility for keeping your customers' data safe first and foremost. Luckily, payment processing isn't that hard to figure out once you get the hang of it. Most of the hard work is done through the payment gateway, so you can focus on the core of your business.