Program Overlaps

What is an overlap?

An overlapping enrollment occurs when a client’s enrollment in one HMIS project begins before their enrollment in another project has ended, resulting in two or more enrollment periods covering the same dates.

In HMIS, each project enrollment has an Entry Date and, when applicable, an Exit Date. These dates establish the period during which a client is participating in a project. When those dates overlap across projects, HMIS may identify a potential data quality issue that needs to be reviewed.

An overlap does not automatically mean that an error has occurred. Some situations may be permitted under HUD HMIS Data Standards or applicable program and funding requirements. However, providers must review each overlap to determine whether the dates accurately reflect the client’s circumstances and whether the overlapping enrollments are allowable.

Why Overlaps Matter

Overlapping enrollments are more than a technical error, they represent a breakdown in accurate data collection and reporting. HUD considers these errors important because they make the data inaccurate and create a picture that doesn't match what is actually happening.

Impact on Utilization and Inventory

When a client appears enrolled in two projects at the same time, HMIS counts them twice. This makes it look like programs are serving more people than they actually are.

Impact on HUD Reporting

HUD reports such as the Point-in-Time (PIT) Count, Housing Inventory Count (HIC), Longitudinal System Analysis (LSA), and System Performance Measures (SPMs) rely on accurate enrollment dates. Overlaps cause:

Incorrect counts of people experiencing homelessness.
Misreported housing placements and retention rates.
Errors in measures like Length of Stay and Returns to Homelessness.

Impact on Coordinated Entry

Overlaps make it appear that clients are in multiple programs simultaneously, which could disrupt coordinated entry prioritization.

Overlap Examples

Example	Project A	Project B	What's the Issue?
Two Active Enrollments	Entry: March 1 Exit: March 10	Entry: March 8	The client appears enrolled in both shelters from March 8 - 10
Missing an Exit Date	Transitional Housing: Entry January 15; no exit recorded	Permanent Supportive Housing: Entry June 1	The client is still listed as active in the previous program
Housing Move-in-Date	Rapid Rehousing Program: Entry October 6 HMID: October 9	Permanent Supportive Housing: Entry December 4 HMID: December 7	The client is listed as moving into housing on two different dates

When is an Overlap Allowed?

Street Outreach and Emergency Shelter: A client can be served by Street Outreach while staying in an Emergency Shelter.

Street Outreach and RRH/PSH: These may overlap as long as there is no Housing Move-in Date

Emergency Shelter and PSH or RRH: These may overlap as long as there is no Housing Move-in Date

Services Only: This may overlap with all other program types

What can you do as a Provider?

Check HMIS Enrollment History

Open the client’s record and review all active and historical enrollments. Confirm which projects overlap and the exact dates.
Verify Documentation

Look at the intake and discharge paperwork for your project. Confirm where the client was physically staying during the overlap.
Determine Correct Dates

Identify which enrollment dates need adjustment based on actual stay. If your project’s dates are correct, contact the other agency.
Update HMIS

Correct Entry and Exit Dates so they reflect actual stays. Remove duplicate enrollments if they were entered in error.
Confirm No New Overlaps

After changes, review the client’s timeline to ensure no new overlaps were created.

Best Practices

Keep Enrollment Dates Accurate
- Ensure that Entry Dates, Exit Dates, and Housing Move-In Dates reflect actual client activity. Accurate dates prevent situations where a client appears active in multiple projects at the same time.
Coordinate Across Programs
- If a client transfers to another program, make sure dates line up. A short conversation or email can prevent dual enrollments and save time later.