---
search:
  tags:
    - projects
    - GET
seo:
  description: >-
    Returns all interim payments (partial payments, advance… Reference for the
    GET /projects/{projectId}/interim-payments endpoint in the Leadtime Public
    API API.
sidebar:
  badge: GET
  label: List project interim payments
title: List project interim payments
type: openapi-operation
---
Returns all interim payments (partial payments, advance payments, prepayments) for the specified project.

**What are Interim Payments?**
Interim payments are payments made before the final project invoice is completed. They help maintain cash flow during long-running projects, split large invoices into manageable parts, and track incoming payments according to agreed payment schedules.

**Typical use cases:**
- Contractually agreed down payment at project start
- Installment after milestone approval
- Security payment before development start

**What is returned:**
- All interim payments for the project, sorted by their sort order
- Each payment includes: title, description (as HTML), amount, billing status, creation date, and sort order
- The description field is automatically converted from internal IDoc format to HTML for API responses

**Important:**
- Only non-deleted payments are returned
- Payments marked as billed (isBilled: true) are still included in the list
- Requires Projects.seeAnyProject permission

<Operation source="api-reference" id="projectinterimpaymentscontroller-listinterimpayments" />