Companies are being asked security questions more than ever before. Customers want to know that their data is protected at all times. And that’s where a Letter comes in. Most companies will do a SOC 2 audit once a year. But it is often in the time between two audit reports that the customer needs reassurance. A bridge letter helps close this gap and maintain confidence. This guide will break down what a SOC 2 Bridge Letter is, why companies use them, the benefits, and the major requirements to create one.
What Is a SOC 2 Bridge Letter?
A SOC 2 Bridge Letter is a letter issued by a company when it receives a SOC 2 report. This indicates if there have been any material changes to the organization’s security controls since the date of last audit through the date of this audit. Consider this as a ‘status update’ to customers, partners, auditors and stakeholders.
Example:
Suppose a company receives their SOC 2 report in January 2025. August 2025 Customer requests proof of security controls. The SOC 2 report only extends through January. The customer may want some assurances that security controls were effective during February through August. That’s the promise you get with a SOC 2 Bridge Letter.
Why Is a SOC 2 Bridge Letter Important?
SOC 2 reports are not a real time document. These are for a specific audit period.
For instance:
| Item | Timeline |
| SOC 2 Audit Period Ends | 31-Jan-25 |
| Customer Security Review | Sept. 2025 |
| Gap | 7 Mo. |
Customers may be wondering, without a bridge letter, have security controls changed in those seven months? SOC 2 Bridge Letter helps organizations to maintain trust and transparency.
Purpose of a Letter
The key is to report any changes that would affect the validity of a current SOC 2 report. The letter would normally state any of the following:
- No changes happened after the audit period for SOC 2.
- Changes happened but had no impact on the control’s efficiency.
- Significant changes took place, and there is a need to explain them further.
This supports ongoing SOC 2 Compliance and builds customer confidence that security practices are consistent.
Key Benefits of a Letter
- Creates Customer Confidence: Clients would want to know about the security controls implemented through an audit. The bridge letter is all about accountability and transparency.
- Helps in Vendor Assessments: Many enterprises carry out vendor risk assessments. Letter can speed up the process by reducing the number of questions asked during the assessment.
- Proves SOC 2 Compliance: The SOC 2 audit is one which looks at compliance over time. This bridge letter can help prove that the organization is still SOC 2 Compliant despite time passing by.
- Closes Report Gaps: Gaps are bound to come up due to the periodic nature of auditing. The bridge letter closes the gap till such time as the next audit report comes out.
- Enhances Business Relationships: Clients who are aware of security issues appreciate when things are communicated proactively. SOC 2 Bridge Letter indicates a more mature organization.
What Should a SOC 2 Bridge Letter Include?
A good bridge letter should be clear, precise and to the point.
Essential Components:
- Referring to the Existent SOC 2 Report:
- Time of Audit
- Date of Report
- Type of Report (Type I or Type II)
- Period Covered: State the period for which the bridge letter was prepared. Example: “The letter is intended to refer to the period from February 1, 2025, through August 31, 2025.”
- Changes to the Controls: Any significant changes related to,
- Security policies
- Systems
- Infrastructures
- Policies
- Processes
- Representation of the Management: The management will ensure that the information presented is correct.
- Signed Letter: The letter should be signed by a key official, such as,
- Chief Executive Officer
- Chief Financial Officer (CFO)
- Chief Security Information Officer
- Compliance Officer
When Should a Company Issue a SOC 2 Bridge Letter?
Bridge letters are generally issued by organizations:
- When customers ask for proof of compliance updates.
- Vendor assessments are in progress.
- Contracts to be renewed.
- Current security documentation is required for procurement teams.
- The next SOC 2 report is not yet available.
Many SaaS companies will have a Letter in their standard security documentation.
SOC 2 Report vs SOC 2 Bridge Letter
| SOC 2 Report | SOC 2 Bridge Letter |
| Management Prepared | Prepared by Audit |
| Audited by an independent audit firm | Not independently confirmed |
| Regarding a specified audit period | Covers gap time |
| Compliance document (formal) | Background paper |
| Needed for SOC 2 Compliance | Ongoing SOC 2 Compliance Support |
Final Thoughts
A SOC 2 Bridge Letter may be a simple document, but it’s an important puzzle piece when it comes to building customer confidence. It closes the gap between audit reports, supports vendor evaluations and illustrates continual SOC 2 Compliance. Businesses are facing increasing security expectations and annual audits cannot be solely relied upon. A well written and accurate Letter reflects your organization’s commitment to transparency, security and compliance. A bridge letter is not only good for a company pursuing a strong SOC 2 Compliance, it’s expected.
FAQs
Q1. What is a SOC 2 Bridge Letter?
A SOC 2 Bridge Letter provides assurance that there have been no material changes to a company’s controls from the end of the company’s SOC 2 audit period until the next report is available.
Q2. Why do you need a SOC 2 Bridge Letter?
Helpful in maintaining SOC 2 Compliance. Helps build confidence among the customer.
Q3. Who writes a SOC 2 Bridge Letter?
It is usually signed by senior management. They could be the CEO, CISO, CFO or Compliance Manager.
Q4. Can a SOC 2 Bridge Letter substitute for a SOC 2 report?
A bridge letter is not a replacement for a current SOC 2 report. This does not replace an independent audit.
Q5. How long is a Letter valid?
Validity is relative to the needs of the organization and customer. The majority of bridge letters cover the period from the last SOC 2 report to date until the next audit report is issued.
Moreover, if you want any other guidance relating to the SOC 2 compliance Service, please feel free to talk to our business advisors at 8881-069-069.
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