---
title: Task link types
description: Task links define the dependency relationship between tasks. Linking tasks creates dependencies that affect task start and finish dates and determine the critical path. The following table describes the four supported link types.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/it-business-management/project-management/task-link-types-project-management.html
release: australia
product: Project Management
classification: project-management
topic_type: reference
last_updated: "2026-03-18"
reading_time_minutes: 1
breadcrumb: [Project Management reference, Project Management, Project Portfolio Management, Strategic Portfolio Management]
---

# Task link types

Task links define the dependency relationship between tasks. Linking tasks creates dependencies that affect task start and finish dates and determine the critical path. The following table describes the four supported link types.

|Link type|Abbreviation|Description|
|---------|------------|-----------|
|Finish-to-Start|FS|Task B cannot start until Task A finishes.|
|Start-to-Start|SS|Task B cannot start until Task A starts.|
|Finish-to-Finish|FF|Task B cannot finish until Task A finishes.|
|Start-to-Finish|SF|Task B cannot finish until Task A starts.|

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