How to Build Your Own PayFit
Replace PayFit with a custom build. UK payroll that's powerful enough for experts, simple enough for anyone
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 43 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Type-safe ORM for complex relational data models
Key Features to Replicate
Top features across 8 categories. See all 43 features
HR(7 features)
Partnered with Yousign to get documents signed quickly and securely online with real-time tracking
Create onboarding checklists and empower new starters to add personal information and upload documents like P45s and ID scans
Centralized system to manage all employee information
Pre-made templates for offer letters, employment contracts, appraisals and more with drag-and-drop variable insertion
Employees submit leave requests in portal, managers approve with one click, automated calculations for all leave types
+2 more in this category
Payroll(6 features)
Automatically calculates earnings, deductions, and net pay
Automatically generates and distributes payslips to employees
Ability to edit variable pay components within payroll
Pay employees instantly and in bulk with Telleroo-enabled salary payments, with same day clearing and ability to pay on weekends/bank holidays
Payslips update instantly as you plug in your numbers
+1 more in this category
Support(6 features)
Access to PayFit Copilot AI assistant and support team available round the clock
Assigned dedicated manager for ongoing support and guidance for businesses with 25+ employees
Access to step-by-step guides and resources
Live chat access to payroll experts for immediate assistance
Quarterly reviews with PayFit team for businesses with 25+ employees
+1 more in this category
Compliance(5 features)
Automatically handles pension auto-enrolment requirements
Automatically generates P11D forms for benefits reporting
Automatically submits Real Time Information (RTI) to HMRC
Software automatically updates for every UK payroll regulation from HMRC changes to statutory payments
PayFit manages P11D forms with post-payday HMRC corrections
Performance Management(4 features)
Conduct surveys to measure employee engagement
Templates and management tools for 1:1 meetings between managers and employees
Enable peer-to-peer feedback and review capabilities
Create, manage, and track performance review campaigns for employees
Expense Management(3 features)
Create custom expense policies, manage expenses, and allow employees to upload and scan receipts with optical character recognition
One-click approval process for employee expense receipts that are automatically paid with next payroll
Automatically scans and processes receipt images
Reporting(3 features)
Automatically generates custom payroll journals in the right format for accounting platforms
Choose from hundreds of pre-built or custom reports to understand impacts of people and pay on business
Review monthly changes using variance reports before approving payroll
Integrations(2 features)
Syncs with Xero, Sage, QuickBooks, and NetSuite accounting platforms
Open API to connect PayFit with favourite workplace tools using custom integrations
Cost Calculator
Keep Paying PayFit
Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 43 features at very easy complexity.