What discount percentage converts best without hurting margins?

As a Shopify store owner in the fashion space, I've been wrestling with the discount dilemma for months. Every time I run a promotion, I'm caught between two fears: not offering enough to attract customers, and giving away too much profit. My margins are already tight—each sale needs to count. I've watched competitors blast generic 20% off codes, but that feels like a sledgehammer approach. I want precision. I want to understand exactly how much discount will nudge a hesitant browser into becoming a paying customer without decimating my bottom line. It's not just about the percentage; it's about timing, intent, and making each discount feel genuinely exclusive. I'm tired of blanket discounts that train customers to always wait for a sale. My goal is smarter, more strategic discounting that feels personalized and creates real urgency. I need a method that respects my brand's value while still being attractive enough to convert those tricky, on-the-fence shoppers who are close to buying but need just a tiny push.