What Is a SOC 2 Bridge Letter? (+ Free Template)

What is a SOC 2 bridge letter?

A SOC 2 bridge letter — also called a gap letter — is a short statement, written and signed by your management, that 'bridges' the gap between the end date of your most recent SOC 2 report and the present day. It affirms that, during that interim period, there have been no material changes to your control environment that would alter the conclusions in your last report.

A simple example makes it concrete: suppose your latest SOC 2 Type 2 report covers October 1, 2024 through September 30, 2025, but a prospect is performing due diligence in December 2025 and their own fiscal year ends December 31. Your report does not cover October through December. A bridge letter tells that customer that nothing material changed in your controls between October 1 and the date of the letter — so they can continue to rely on the existing report.

Why bridge letters exist

The need arises because SOC 2 reporting periods rarely line up perfectly with every customer's calendar or procurement cycle. Two situations drive almost all bridge-letter requests:

• Fiscal-year mismatch — a customer's audit or vendor-review cycle ends after your report period, leaving a gap they need covered.
• Procurement timing — a deal closes, or a security review is performed, months after your report's end date and before your next report is issued.

In both cases the customer is not questioning your security — they simply need written assurance that your controls kept operating after the audited window closed. A bridge letter provides that assurance quickly, without waiting for the next annual report.

What's included in a SOC 2 bridge letter?

A well-formed bridge letter is short, but it should contain a few specific elements so it stands up to scrutiny:

• The name of the service or system the report covers.
• The start and end dates of your most recent SOC 2 report's audit period.
• A statement that, from the report's end date to the date of the letter, there have been no material changes to your system of internal controls — or, if there were changes, a clear description of them and why they would not affect the report's conclusions.
• An explicit note that the letter is not a substitute for a SOC 2 report and is not an auditor's opinion or certification.
• A restriction that the letter is intended solely for the organization and its named recipient and may not be relied upon by other parties.
• Management's signature, title, and contact details.

Who issues a SOC 2 bridge letter?

A bridge letter is issued and signed by your own management — typically a security, compliance, or finance leader — and sent directly to the customer who requested it. The CPA firm that performed your SOC 2 audit is deliberately not involved.

The reason is independence and scope. An auditor can only attest to what it actually examined, during the period it examined. Once the audit window closes, the auditor cannot vouch for what happened next — if you changed cloud providers or reorganized access controls in the interim, the auditor has tested none of it. Management, however, can credibly state whether anything material changed. That is why the bridge letter is a management representation, not an audit deliverable.

Sample SOC 2 bridge letter (template)

You can adapt the following template to your organization. Replace the bracketed placeholders with your details and have a member of management sign it.

How long can a bridge letter cover?

Bridge letters are intended to be short-term. As a rule of thumb, they should not cover more than about three months. Beyond that window, the gap between audited assurance and current reality grows large enough that a fresh management statement loses credibility — and a sophisticated customer will (rightly) ask for your next SOC 2 report instead.

If you find customers repeatedly asking you to stretch a bridge letter across longer gaps, that is a signal to adjust your audit cadence so your reporting periods are consecutive and current.

Limitations: what a bridge letter is not

A bridge letter is a useful stopgap, but it is important to set expectations correctly:

• It is not audited — it is management's own representation, with no independent testing behind it.
• It is not a SOC 2 report and does not extend your auditor's opinion.
• It does not cover new controls or environments added after the report period; it only asserts that existing controls were unchanged.
• It is restricted-use and should be shared only with the specific customer who requested it.

Bridge letter best practices

A few habits keep bridge letters credible and low-effort:

• Keep a ready-to-use template so you can respond to requests within a day.
• Be honest about material changes — disclose and explain them rather than glossing over them; a transparent letter builds more trust than a vague one.
• Have a consistent signer (e.g., your security or compliance lead) and keep contact details current.
• Track which customers received a letter and for which period, so renewals are easy.
• Pair the letter with your latest report and, where possible, a link to your trust center.

Reducing your reliance on bridge letters

Bridge letters solve a timing problem, so the best long-term fix is to remove the timing gap. Running consecutive annual Type 2 periods, maintaining continuous compliance, and publishing real-time control status through a trust center all shrink the windows in which a bridge letter is needed.

ISpectra helps clients schedule reporting periods so coverage stays continuous, and maintain controls year-round so each renewal — and any interim bridge letter — is a quick, confident exercise rather than a scramble.