What a usable data inventory should answer
Your inventory should make it easy to explain what data you collect, why you collect it, where it flows, who can access it, and how long you keep it.
For SaaS teams, the inventory should cover both product data and operational data. Customer account records, support tickets, analytics events, billing records, marketing contacts, logs, and vendor exports can all contain personal data.
Checklist
List each product and internal system that stores personal data
Document categories of personal data processed in each system
Record the lawful basis or business purpose
Identify subprocessors or external recipients
Record data residency and transfer considerations
Document retention expectations and deletion workflows
Link the process owner for each record
Identify integrations that move data between systems
Note whether data is manually exported or uploaded
Record which systems support DSAR search or deletion
Link vendors and subprocessors to each processing activity
Record last reviewed date for each inventory item
Common gap
Most inventories describe applications but not data movement. Add integrations, exports, and manual handoffs so the record reflects reality.
Suggested fields
Use a simple table:
| Field | Example |
|---|---|
| System | Support platform |
| Data categories | Name, email, ticket content, logs |
| Purpose | Customer support |
| Data subjects | Customer users |
| Recipients | Support vendor, hosting provider |
| Location | US or EU region |
| Retention | Contract term plus support history period |
| Owner | Customer operations |
| DSAR support | Search and export available |
| Last reviewed | Quarterly |
Review triggers
Update the inventory when:
- A new feature collects personal data.
- A new vendor receives personal data.
- Data retention changes.
- A new region or hosting location is added.
- Support, analytics, or marketing workflows change.
- A DSAR reveals a missing system.