
What is Employer Cost API?
Employer Cost API calculates the true cost-to-employer for any U.S. worker. It includes employer payroll taxes (Social Security, Medicare, FUTA, SUTA), workers’ comp, employer-paid benefits, retirement match, PTO cost, and full annual and per-period breakdowns. Designed for HR SaaS, payroll tools, finance apps, and startups that need accurate compensation modeling. Simple JSON output, fast responses, and clean developer experience.
Problem
Users manually calculate employer payroll taxes, benefits, and compliance costs, facing time-consuming errors and incomplete data.
Solution
A payroll calculation API that automates total employer cost computations, delivering JSON outputs for HR SaaS and payroll tools.
Customers
HR tech developers, payroll SaaS product teams, and fintech startups focused on compensation modeling.
Unique Features
Combines payroll taxes, workers’ comp, benefits, PTO, and compliance data into a single API with real-time updates.
User Comments
Saves weeks of development time
Critical for accurate compensation models
Easy integration with clear docs
Eliminates manual tax research
Essential for scaling HR tools
Traction
Launched recently on ProductHunt, 180+ upvotes, founder X followers: 1.2K, integrated by 50+ early adopters
Market Size
U.S. HR tech market valued at $40.5 billion in 2023, driven by payroll automation demand.


