What is a records retention period and how is it calculated?

A records retention period is the length of time an organization is required, or chooses, to keep a record before it is dispositioned — that is, destroyed, transferred to an archive, or otherwise removed from active custody. The retention period reflects how long the record holds value: legal, regulatory, fiscal, operational, or historical. Defining it consistently is the foundation of a defensible records program.

Why Retention Periods Exist

Records are not meant to be kept forever, nor discarded at will. A retention period balances competing obligations: meeting legal and regulatory recordkeeping requirements, supporting business needs and litigation readiness, and reducing the cost and risk of holding information longer than necessary. Disposing of records consistently under an approved schedule — rather than ad hoc — is what makes destruction defensible.

How a Retention Period Is Calculated

A retention period generally has two parts: a trigger event (the point from which time is counted) and a duration (how long after the trigger the record is kept).

• Trigger / cutoff event — the action that starts the clock. Common triggers include the end of a fiscal or calendar year, the completion of a project, the closing of a case, the termination of a contract, or the separation of an employee.
• Duration — the time that must pass after the trigger before disposition, often expressed in years (for example, “retain for a set number of years after the event”).

So a retention rule reads as: keep the record for [duration] after [trigger], then [disposition action].

What Drives the Length

Organizations determine durations by reviewing several factors together:

• Statutory and regulatory requirements that mandate minimum retention for specific record types.
• Statutes of limitation and potential litigation or audit needs.
• Business and operational value — how long the record is actively useful.
• Historical or archival value, which may warrant permanent retention.

When multiple requirements apply to the same record, the program generally adopts the longest applicable period. These decisions are documented in a retention schedule and applied uniformly. Where a specific requirement is unclear, consult counsel or the relevant regulator rather than guessing.

For more guidance, see the retention and disposition topic hub.