Home
Open Source · MIT License
Pre-release
Don't build payroll — embed it.
A composable payroll framework you embed into your platform — not a black box you work around.
✓ Multi-country
✓ Multi-industry
✓ Multi-tenant
✓ Test-Driven
$docker compose up -d
// running in under 5 minutes
Your Role
Provider
HR-tech & EOR Platforms
Payroll as a service — integrate via REST API, run payruns, query results, manage multi-tenant setups.
Provider Overview →
Regulator
Payroll Consultants & HR Specialists
Define payroll rules — wage types, scripts, and case models in JSON or YAML. LLM-assisted authoring supported, validated with built-in tests.
Regulator Overview →
Automator
DevOps & Integration Engineers
Automate & extend — build pipelines, batch runs, and tooling using the .NET Client Services SDK and CLI.
Automator Overview →
How it works
Cases
Input
Capture salary, absences, and benefits as time-stamped events with validity periods.
»
Payrun
Processing
Wage types and collectors defined in regulation layers calculate employee pay.
»
Results & Reports
Output
Payslips, legal filings, and data exports generated from multilingual report templates.
What you get
Payroll Regulations
Composable, versioned layers — country, industry, and company regulations stacked and inherited.
REST API
Fully documented HTTP API for embedding payroll processing into any platform.
Regulation Scripting
C# expressions embedded in JSON or YAML — no compiler, no project, just logic where you need it.
Test-Driven
Built-in payroll test framework for case validation, payrun assertions, and regression testing.
Multi-Tenant
Tenant isolation with shared regulations — ideal for SaaS payroll platforms and EOR providers.
Time-Aware
Period-based data model with retroactive recalculation and calendar-aware payrun scheduling.
Why Payroll Engine
Skip years of custom development
Building payroll from scratch takes years. Payroll Engine gives you a production-ready calculation engine, case model, and REST API on day one.
Open-core: auditable by design
The engine is fully open source — every calculation, every rule, every API is inspectable. Regulations can be open or commercial, but the core is never a black box.
No vendor lock-in
MIT licensed, self-hosted, open source. You own the stack — no per-employee fees, no runtime licenses, no black-box SaaS dependency.
A regulation ecosystem
Regulations are exchangeable modules — open or commercial. The long-term vision: a standardized library of country and industry regulations that any platform can adopt.
Ready to embed payroll?