Our pricing structure has a variable fee. We do final payment via Square Invoice. For example- the full fee is $1100-1500 (client decides final amount in this range). They pay a retainer of $550 up front and then I invoice after service for the balance due- $550-950. Right now I have clients "slide up" using the tip section, but that only allows for 50% of the charge, which doesn't cover our full slide up range. What's a good work around for this pricing approach?
