The Cost Savings of Fixing Security Flaws in Development

**Executive summary:** This article argues for integrating security earlier in the software development lifecycle by using a Return on Mitigation (RoM) framework to quantify savings from catching vulnerabilities pre-production, highlights cost and effort differences between pre- and post-production fixes, and positions HackerOne PullRequest as a developer-first solution that combines AI and manual review to reduce remediation costs and developer friction.