To fill out a CAIQ questionnaire without starting from scratch, the method comes down to four moves: first build a base of dated documents, then answer domain by domain rather than line by line, honestly flag the missing controls with an improvement plan, then have each domain reviewed by the person responsible for it. A company that capitalizes on its validated answers fills out its first CAIQ in a few days, and the next ones in a few hours.

What is the CAIQ questionnaire?

The CAIQ (Consensus Assessments Initiative Questionnaire) is the standard questionnaire published by the Cloud Security Alliance, the reference organization for cloud security. It is used to assess the security practices of a cloud service provider: a host, an online software vendor, a managed-services provider.

In practice, it is a list of closed questions (yes, no, not applicable) with a comment field. Each question maps to a control in the Cloud Controls Matrix (CCM), the control framework from the same organization. Version 4 of the CAIQ has about 260 questions across 17 domains: governance, access management, encryption, business continuity, incident management, compliance, subcontracting, among others.

The Cloud Security Alliance publishes the CAIQ for free and maintains the STAR Registry, a public directory where vendors can post their completed CAIQ to make it available to their customers.

Cloud Security Alliance, STAR program

Two things set it apart from in-house questionnaires: it is standardized, so your answers are reusable from one customer to the next, and it is public, so you can prepare it before anyone even asks.

Who sends it, and why

The CAIQ usually arrives through one of two channels. First case: an enterprise customer (a bank, a manufacturer, an insurer, a large software company) assesses your company before signing, and its procurement team or security officer sends you the CAIQ as is or in an adapted version. Second case: you fill it out on your own initiative to publish it or attach it to your sales responses, precisely to avoid re-filling an in-house questionnaire for every prospect.

On the customer side, the goal is always the same: to document, for its own risk-management file, proof that your company controls what it claims to control. The person reading your answers is not looking for “Yes”: they are looking for usable answers, with a policy cited, a date, a scope.

How to fill it out, section by section

The classic mistake is to open the file and answer in order, line after line. That is the longest path: the 260 questions actually draw on about thirty source documents. It is much faster to start from the documents.

1. Build the document base

Before answering anything, gather what already exists. For a CAIQ, the typical base fits on a short list:

  • an information security policy, dated and signed;
  • an access management policy and an offboarding procedure;
  • an encryption policy (at rest, in transit, keys);
  • a continuity plan and the latest restore test;
  • an incident management and notification procedure;
  • a sub-processor register and data location;
  • any certifications with their scope (ISO 27001, SOC 2);
  • the latest penetration test report, even a partial one.

Every document found at this stage prevents ten improvised answers later. And the inventory of gaps you discover here is already, in itself, a useful deliverable.

2. Answer domain by domain

Handle the CAIQ in coherent blocks, not in line order. All the questions in a single domain (encryption, for example) rely on the same two or three documents: handling them together ensures the answers are consistent with each other and cuts the search time.

For each question, the structure of a good answer is always the same: the position (yes, no, not applicable), the reference to the document that proves it with its version and date, and the exact scope covered. “Yes, see Encryption Policy v3, section 4, reviewed in January 2026, production scope” is worth infinitely more than a bare “Yes.”

3. Handle gaps honestly

Across 260 questions, a mid-sized company will always have missing or partial controls. That is expected. What disqualifies a dossier is not the gap: it is the unverifiable “Yes” that will be caught in review or, worse, in an audit.

For each gap, three possible answers: “No, planned for next quarter” with a dated plan, “Not applicable” with a one-sentence justification, or “Partially” with the scope actually covered. Assessment teams know how to read a credible improvement plan; they also know how to spot a box checked too quickly.

4. Prepare the internal review

A CAIQ commits your company. Before sending, each domain has to go before the person who answers for it: the security officer or whoever fills that role for the technical measures, legal for subcontracting and contractual commitments, management for the timelines and plans announced. Prepare this review by listing, domain by domain, who validates what: that is what turns three weeks of round-trips into a one-hour meeting.

The mistakes that cost round-trips

The same causes produce the same follow-ups. In CAIQ dossiers that come back with a list of additional questions, you almost always find:

  • “Yes” answers with no reference: the answer may exist, but with no document cited it is unverifiable and will be challenged;
  • mixed-up scopes: the group policy cited for a product it does not cover;
  • missing or expired dates: a policy not reviewed in three years says the opposite of what it claims;
  • inconsistencies between domains: “systematic” encryption in the cryptography domain, but exceptions in the backup domain;
  • answers that contradict a previous dossier: if the same customer has assessed you before, it will compare.

The remedy is the same for all of them: a single answer base, kept up to date, with each answer’s supporting evidence, its date, and the person who validated it. The first CAIQ builds this base; the next ones only update it.