In Expenses add one-off or monthly costs in your store base currency. Monthly expenses charge on the same day-of-month as the start date (while active). Saving recomputes daily profit from that date forward.
What counts as custom expense
- SaaS tools, salaries allocations, warehouse rent slices, agency retainers
- Not COGS (use Products) and not carrier cost (use Shipping cost rules)
Payment fees remain under Settings (% + fixed per order).