If anything, the calculation is overstating the realistically expected cost in a few ways:
- Particularly B2B SaaS will likely have some % of invoice/bank transfer payment. Assuming 100% payment via credit card is a 'worst-case' assessment.
- Even given that, the bulk of the cost are credit card processing fees, which you would pay either way. Maybe not exactly at stripe's rate, but something similar.
- Stripe Tax for example doesn't charge 0.5% of revenue flat. It only charges for revenue where you’re registered to collect taxes, which for an international business will be far from every transaction (depends on locality & customer base, of course). In addition to that, the pricing drops to 0.4% if you process more than $50k per month.
All in all, I appreciate the effort, but given that Lago is a stripe competitor, this calculation dressed up as a 'neutral assessment' on Github seems disingenuous and makes me trust them less.