1. Currency Exchange: Required when payments are made in currency other than EUR, specifying exchange rate determination

2. Milestone Payments: Used when payments are tied to specific project milestones or deliverables

3. Performance Bonuses: Include when agreement includes performance-based additional payments

4. Third-Party Payment Processor: Required when using payment platforms or processors

5. Expense Reimbursement: Include when freelancer can claim additional expenses beyond basic fees

6. Payment Security: Include when requiring advance payments or security deposits

7. Dispute Resolution: Detailed dispute resolution procedures beyond standard court jurisdiction

8. Multi-Project Billing: Include when contract covers payments for multiple projects or service types

1. Schedule A - Fee Schedule: Detailed breakdown of fees, rates, and payment amounts

2. Schedule B - Invoice Template: Standard invoice format meeting German legal requirements

3. Schedule C - Payment Timeline: Detailed payment schedule with specific dates or milestones

4. Schedule D - Banking Details: Complete banking information for both parties

5. Appendix 1 - VAT Requirements: Detailed VAT handling procedures and requirements

6. Appendix 2 - Service Level Metrics: Performance metrics affecting payment terms if applicable

7. Appendix 3 - Expense Policy: Detailed policy for expense claims and reimbursement procedures