1. Progress Summary: Used when the invoice is for ongoing projects to show percentage completion and milestone achievements

2. Variations: Include when there are approved changes to the original scope of work

3. Retention Details: Used when retention money is being held, showing amounts and release dates

4. Previous Payments: Include for ongoing projects to show history of payments and remaining balance

5. Safety Certification: When specific safety requirements or certifications need to be documented

6. Quality Assurance: When specific quality checks or certifications need to be documented

1. Schedule A - Detailed Work Breakdown: Comprehensive breakdown of all works with detailed measurements and calculations

2. Schedule B - Materials List: Detailed list of materials used with quantities and costs

3. Schedule C - Time Sheets: Breakdown of labor hours and rates if charging on a time basis

4. Appendix 1 - Progress Photos: Photographic evidence of completed works

5. Appendix 2 - Certificates: Copies of relevant certificates, permits, or compliance documents

6. Appendix 3 - Variation Orders: Copies of approved variation orders referenced in the invoice