Progress Invoices

A progress invoice, also known as a partial invoice or interim invoice, is a billing document used in project-based industries to request and record payment for work that has been completed up to a certain point. It serves as a tool to manage and track the financial aspect of ongoing projects, allowing for the systematic collection of payments throughout the duration of a project rather than waiting until the project is fully completed.


Progress invoices are commonly used in industries such as construction, engineering, software development, and consulting, where projects are typically long-term and involve multiple phases or milestones. Instead of billing the client for the entire project upfront or at the end, progress invoicing allows for a more flexible and manageable payment structure.


  1. Cash flow management: By invoicing for completed work on a regular basis, businesses can improve cash flow and reduce the financial strain associated with waiting for a project to be fully completed before receiving payment.
  2. Transparency: Progress invoices provide a detailed breakdown of the work completed and the corresponding costs involved. This transparency helps both the client and the service provider understand the progress made and the financial implications.
  3. Client satisfaction: Frequent invoicing allows clients to see tangible progress and provides an opportunity to address any concerns or issues early on, ensuring a higher level of client satisfaction.
  4. Project control: Using progress invoices enables project managers to monitor the progress of each phase or milestone and evaluate if any adjustments need to be made to ensure the project stays on track.


  1. Construction industry: Progress invoicing is extensively used in the construction industry, where projects are often divided into stages such as pre-construction, site work, and completion. Invoices are issued at predetermined intervals or when specific milestones are achieved.
  2. Software development: In the realm of software development, progress invoicing allows developers to receive compensation for completing specific features or modules of a larger project. This approach aligns with the agile development methodology, allowing for iterative development and delivery.
  3. Consulting services: Consultants frequently use progress invoicing to bill clients based on completed project phases or deliverables. This way, consultants can demonstrate their value at various stages of the project and maintain a steady income stream throughout the engagement.


Progress invoices provide a flexible and efficient method for billing and monitoring ongoing projects. By billing for work completed at various stages or milestones, progress invoicing offers businesses improved cash flow, transparency, client satisfaction, and project control. This invoicing method finds applications in various industries such as construction, software development, and consulting, where projects are characterized by multiple phases or deliverables. Embracing progress invoicing can contribute to smoother project management and stronger client relationships, making it an invaluable tool in the realm of project-based industries.

This glossary is made for freelancers and owners of small businesses. If you are looking for exact definitions you can find them in accounting textbooks.

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