Agencies and services firms running ERPNext know their people are their cost of goods sold, but native ERPNext keeps attendance, project timesheets, billing, and payroll in loosely connected silos. Standard Employee Checkin and Attendance prove someone showed up, while the Timesheet DocType records what they worked on — but nothing reconciles the two. A person marked present for 8 hours with only 5 hours of logged tasks slips through unnoticed, billing rates and cost rates live in scattered fields, and finance rebuilds the margin picture in spreadsheets every month. When your profit is the gap between billable hours and paid labor cost, that gap deserves to be a first-class number inside ERPNext, not a manual reconciliation.

We build a proper Frappe app — its own module, installed via bench get-app and bench install-app — that layers on top of the native Attendance, Timesheet, Project, Sales Invoice, and Salary Slip DocTypes rather than replacing them. Scheduler events and hooks.py document events (on_submit, validate, on_update) auto-generate draft Timesheet records from approved Attendance and Employee Checkin data, so the workday HR already captured becomes the starting point for project time — and any variance between attended hours and logged hours is surfaced before it reaches billing. Each Timesheet Detail line carries a billable flag, a billing rate, and a costing rate, so the same entry drives both the customer-facing Sales Invoice amount and the internal labor cost booked against the Project.

On top of that we wire a real approval path using Frappe's Workflow engine: time entries move through Draft to Submitted for Approval to Approved (or Rejected back to the employee), gated by role profiles and permission rules so an employee can log time but only a project manager can approve it for billing. Server scripts and controller hooks enforce your business rules — daily-hours caps, non-billable code lists, locked periods after payroll cut-off — and whitelisted methods exposed over the Frappe REST API let a mobile timer, a Slack bot, or an external PSA push entries straight into the workflow. Utilization and capacity reports are built as Query Reports / Report Builder views over the timesheet data, giving you billable-utilization %, capacity-vs-booked, and project-margin figures without an export.

Because this is build-to-order, nothing ships until we agree on scope. We start with a short scoping call, map exactly how your attendance-to-billing chain should behave (rounding rules, approval roles, invoice cadence, which cost flows into Salary Slip), then build the app against Frappe/ERPNext v15/v16, validate it on a staging clone of your instance through UAT, and install it on production with a rollback plan. You receive the full source in a git repository, so you own the code and are never locked to us. Typical delivery is 2–4 weeks from confirmed scope, and we stay on through a post-go-live support window.