Swiss Payroll Management

Desktop application for payroll management in Switzerland built with C#, .NET 8, Avalonia, SQLite, and Entity Framework Core.

The project follows a layered architecture with a clear separation between domain model, business logic, infrastructure, and UI. It is designed as a local, maintainable foundation for small to medium-sized teams with around 40 employees and can later be extended for PostgreSQL and additional payroll rules.

Goals

The application is intended to support monthly payroll processing in a Swiss business context and provide a solid technical base for future functional growth.

Planned core features:

• Employee master data management
• CSV import for working hours
• Payroll calculation including Swiss deductions such as AHV and ALV
• Expense management with manual adjustments
• Monthly payslip generation as PDF

Project Structure

• src/Payroll.Domain: Core business entities and rules
• src/Payroll.Application: Use cases, queries, and business orchestration
• src/Payroll.Infrastructure: EF Core, SQLite, and technical implementations
• src/Payroll.Desktop: Avalonia desktop UI and view models
• docs: Architecture notes and project planning

Development Principles

The project follows a few non-negotiable implementation rules:

• business logic should exist only once and not be duplicated
• the same kind of data should always be presented consistently
• UI behavior should remain predictable across all screens
• UI must not contain business logic
• existing code should be reused before creating parallel structures

See docs/development-principles.md for the full project rules.

Tech Stack

• Language: C#
• Framework: .NET 8
• UI: Avalonia
• Database: SQLite
• ORM: Entity Framework Core
• IDE: VS Code

Getting Started

dotnet build Lohnabrechnung.slnx
dotnet run --project src/Payroll.Desktop/Payroll.Desktop.csproj

Current Status

The repository currently contains a minimal starter project with:

• a clean layered architecture
• initial domain models for employees, work time, expenses, and payroll runs
• an EF Core SQLite data context
• a minimal Avalonia desktop UI with seeded sample employees

The current state is intended as a technical foundation for the next functional milestones.

Roadmap

• CSV import for working hours
• configurable payroll deduction rates
• PDF generation for payslips
• preparation for future PostgreSQL support