Build a Custom Time & Expense System for Your Agency

Growing staffing agencies often start with tools like Harvest or Toggl. These platforms work for simple hourly billing but fail when managing multiple contractors with different rates per client, project, or even task. Their data models are rigid; you cannot add a field for an overtime multiplier or a holiday rate without complex workarounds using tags, which quickly become unmanageable and lead to billing errors.

Consider a 25-person agency placing IT contractors. One client has a contractor at $150/hr for standard work and $225/hr for after-hours support. Another client has three contractors on the same project, but one is a senior dev at $180/hr and two are mid-level at $125/hr. In Toggl, a manager must manually review every timesheet, cross-reference a separate spreadsheet of rates, and then hand-key the final amounts into QuickBooks for invoicing. This process takes 5-10 hours per week and is prone to errors that damage client trust.

The core architectural issue is that tools like Harvest are built for direct-to-client freelancers or agencies with simple, uniform pricing. They are not designed for the three-sided market of an agency, a client, and a contractor. They lack the relational database structure to properly link a specific contractor's rate to a specific client's SOW for a specific time period. The platform's business model relies on a one-size-fits-all approach, which breaks down for professional services firms with complex billing logic.

The result is a constant administrative burden. Your team spends hours on manual data entry and reconciliation instead of on recruiting or client management. Each new contract with a unique rate structure adds another layer of complexity to a fragile spreadsheet-based system. This manual overhead directly limits how fast the agency can scale.

The engagement would begin with a discovery phase to map every contractor role, rate structure, and client billing cycle. Syntora would audit your existing timesheets and QuickBooks invoices to understand the exact data fields and logic required. This produces a clear architectural document defining the database schema in Supabase and the API endpoints in FastAPI, which you approve before any code is written.

The system would be a FastAPI web application with a Supabase PostgreSQL database for data storage. Contractors would log in to a simple interface to submit time, which is validated against their specific SOW rules. A Claude API-powered component could parse expense receipts, extracting vendor, date, and amount with over 95% accuracy. For a 25-person agency, the monthly hosting cost on Vercel and Supabase would be under $50, compared to the $250+ in per-seat fees for off-the-shelf tools. The build timeline would be approximately 4-6 weeks and would process invoice generation for 100 contractors in under 3 minutes.

The final deliverable is not just an application, but a complete system you own. It would connect directly to the QuickBooks API to create draft invoices automatically each billing cycle. You receive the full Python source code in your own GitHub repository, a deployment runbook, and a dashboard for monitoring system health. The system is designed to be maintained by any competent engineer, ensuring you are never locked into Syntora.