How long do IT system and access logs need to be kept for compliance?

There is no single universal retention period for IT system and access logs. How long you must keep them depends on what the log documents, the legal and regulatory framework you operate under, and your organization’s approved retention schedule. The goal is to keep logs long enough to satisfy security, accountability, and compliance needs without holding them so long that they create unnecessary cost and risk.

What Drives the Retention Period

Several factors determine how long a given log should be kept:

• The log’s purpose. Security and audit logs that establish who accessed a system, what changed, and when often need longer retention than routine operational or debug logs.
• Applicable laws and regulations. Industry and sector rules (for example, those governing financial, health, privacy, or government records) frequently set minimum retention periods for audit trails. Identify the requirements that apply to your data.
• Your records retention schedule. Logs are records. They should be classified and assigned a disposition through your organization’s schedule rather than deleted ad hoc. In the U.S. federal context, agencies map many system and audit logs to authorities such as the NARA General Records Schedules.
• Litigation and investigation needs. A legal hold can suspend normal disposition, requiring you to preserve logs well beyond their scheduled retention.

Practical Guidance

• Distinguish log types. Separate high-value security and access-control logs from short-lived operational logs, and assign each its own retention rule.
• Document the basis. Tie every retention period to a statute, regulation, or approved schedule so the period is defensible and consistent.
• Protect integrity. Logs used for accountability should be tamper-resistant, time-synchronized, and reliably backed up for their full retention period.
• Dispose consistently. When a retention period ends and no hold applies, dispose of logs through an authorized, documented process.

Treat log retention as a records management decision, not just an IT setting. Establishing clear, schedule-driven rules keeps logs available when they are needed for security, audits, and discovery, and lawfully disposable when they are not.

Learn more on the electronic records topic hub.