Invoice clients for custom software builds, consulting engagements, and ongoing development contracts with clear, itemized billing.
A software developer invoice is a billing document issued by an independent developer or development firm to a client for custom software work. It details services such as application development, code review, architecture consulting, testing, and deployment. The invoice records the agreed rate, hours or deliverables, payment terms, and any expenses, serving as the official request for payment and a record for both parties.
| Service | Typical Rate | Unit |
|---|---|---|
| Application Development | $95 - $200 | per hour |
| Code Review and Audit | $100 - $180 | per hour |
| Technical Architecture Consulting | $120 - $250 | per hour |
| QA and Testing | $60 - $110 | per hour |
| DevOps and Deployment Setup | $1,500 - $8,000 | per project |
| Monthly Support and Maintenance | $500 - $3,000 | per month |
For corporate clients, confirm the purchase order process before submitting your first invoice as many companies require a PO number before processing payment. For ongoing engagements, invoice on a fixed schedule, weekly or bi-weekly, to maintain cash flow and avoid large outstanding balances. Include a detailed breakdown of tasks completed in the billing period so clients can verify the work. For project-based work, tie invoices to specific milestones defined in your contract. Always invoice in the currency agreed in your contract and specify how expenses will be reimbursed. Follow up promptly on unpaid invoices since corporate accounts payable departments often work in batches.