How to answer an enterprise security questionnaire as an Australian SaaS vendor

Why enterprise buyers send questionnaires, and who reads them

Enterprise buyers send security questionnaires because they stay responsible for their data after a vendor starts holding it, and the questionnaire is how they show they checked. For Australian banks, insurers and super funds this is a regulatory requirement, not a preference.

APRA’s Prudential Standard CPS 234, in force since 1 July 2019, requires an APRA regulated entity whose information assets are managed by a third party to assess that party’s information security capability, in proportion to the consequences of an incident. It must also evaluate the design of the third party’s controls that protect its information. Your questionnaire answers become part of that assessment, and they are often attached to the contract.

The readers are usually a third party risk analyst who scores the answers, a security engineer who checks the evidence, and a procurement or legal person who turns gaps into contract clauses. Write for all three: short, specific answers, with the proof attached.

The common formats: CAIQ, SIG, bank and government templates

Most questionnaires are either a standard framework or the buyer’s own template mapped to one, so a single well kept answer library covers most of them.

Format	Who uses it	What to know
CAIQ (Cloud Security Alliance)	Cloud and SaaS buyers worldwide	Version 4.1 was released in January 2026; yes or no questions mapped to the Cloud Controls Matrix; completing it lists you at STAR Level 1
AI-CAIQ (Cloud Security Alliance)	Buyers assessing AI services	Version 1.1 covers AI specific controls
SIG (Shared Assessments)	Banks, insurers, large enterprises	Comes in Lite and Core scopes, chosen by the vendor’s risk rating
Bank and insurer templates	APRA regulated entities	Built around CPS 234, CPS 230 and the buyer’s policies; often long
Government templates	Federal and state agencies	Reference the ISM, Essential Eight, IRAP and data hosting rules

Publishing a completed CAIQ can head off some custom questionnaires, because many analysts accept it as a starting point.

Questions on hosting, data residency and subprocessors

Expect precise questions about where data is stored, processed, backed up and supported from, and which subprocessors touch it. Answer region by region and service by service, not with “hosted in Australia”.

A complete answer names the cloud provider and region for production data, backups, logs and disaster recovery, lists every subprocessor (email, support desk, error monitoring, analytics, AI model providers) with its processing location, and says who can access production and from where. If any support or engineering staff work offshore, say so. Our guide to data residency and data sovereignty explains the distinction buyers are probing.

Identity, MFA, Essential Eight and ASD Essentials questions

Identity questions are the ones most often failed, and the easiest to fix. Buyers ask whether every staff account uses multi factor authentication, whether admin access is separate and limited, whether customers can sign in with their own identity provider, and how quickly access is removed when someone leaves.

Australian buyers frequently ask you to state a maturity level against the Essential Eight, ASD’s eight mitigation strategies. The maturity model, last updated in November 2023, defines levels from basic to stronger protection against advanced threats, and ASD recommends reaching the same level across all eight strategies. On 15 October 2026 ASD published ASD Essentials to evolve it: actions are rated not assessed, not effective, partially effective or fully effective for each domain, and ASD says old maturity levels don’t automatically convert. If a questionnaire asks for a level, answer it, and say how you would evidence the same controls under ASD Essentials. ASD says the Essential Eight was designed to protect organisations’ internet connected IT networks, so a cloud SaaS product only partly maps to it; describe your equivalent controls and the gaps honestly. Our guide to the Essential Eight and ASD Essentials in software development shows how to map a cloud product to both.

CPS 234 and CPS 230 flow down clauses for APRA regulated buyers

Banks, insurers and super funds push their prudential obligations down to vendors through contract clauses, so read the questionnaire and the draft contract together.

From CPS 234, expect clauses on notifying the buyer of security incidents promptly, allowing security testing or audit, maintaining specified controls, and classifying and protecting their information. From CPS 230 Operational Risk Management, expect clauses on business continuity, service levels, subcontracting and exit support if you are a material service provider. APRA released final targeted amendments to CPS 230 on 30 April 2026, introducing limited exemptions from some contractual requirements for certain categories of service provider. Our guides to CPS 234 and CPS 230 for AI vendors go into detail.

Answering honestly when a control is missing

When you don’t have a control, say so, describe what you do instead, and give a realistic date for closing the gap. An inflated “yes” is the expensive answer: it gets copied into the contract as a warranty, and it is found in the next audit or after an incident.

Use four answer types consistently:

1. Yes, with evidence attached or available on request.
2. Partial, stating exactly what is in place and what isn’t.
3. No, planned, with the compensating control and a target date.
4. Not applicable, with a one line reason.

Have one person approve every answer before it leaves the company, and record what you told each customer, because commitments differ between questionnaires and you must honour all of them.

Building an answer library you can reuse

Treat questionnaire answers as a maintained product document, not a one off reply. The first questionnaire is slow because the evidence is scattered; every later one should mostly be copy, check and attach.

Keep the library in one place, with each entry holding the standard question wording, your approved answer, the evidence that proves it, the owner who keeps it true and the date it was last checked. Organise it by control area (identity, encryption, logging, backups, incident response, people security, vendor management, AI) rather than by customer, and map each entry to the CAIQ question it answers, because many custom templates are loosely based on it.

Review the library whenever the system changes, and at least every quarter. An answer about backups written before you moved regions, or about access control before you added a support contractor, is now a misstatement. When a buyer asks something new, write the answer once, get it approved, and add it to the library so the next team member finds it.

Finally, decide who may send answers. Sales teams under deadline pressure tend to say yes; the approval step protects them as well as the company.

A trust page and security pack that shortcut the process

A public trust page and a security pack shared under NDA answer most questions before they are asked. Analysts then confirm rather than interrogate, which shortens the review.

The trust page covers hosting regions, encryption, access control, testing, certifications held (only those genuinely held), subprocessors and a security contact. Our own trust page is an example of the format. The security pack adds documents: an architecture and data flow diagram, information security policy, incident response plan, business continuity summary, latest penetration test summary with remediation status, a completed CAIQ, and, if relevant, your SOC 2 or ISO 27001 report or certificate. Add a one page AI section if your product uses AI models: providers, processing regions, training use and safeguards.

For government work, also prepare for questions about the ISM and IRAP. The IRAP explainer covers what an assessment involves.

The fixes that pay back first, with effort estimates

Fix the controls that appear in nearly every questionnaire before chasing certification. The estimates below are typical ranges for a small SaaS team on a modern cloud platform, not quotes.

Fix	Typical effort	Why it pays back
MFA on every staff, cloud, code and admin account	Days	The most common failed question
SSO for customers (SAML or OIDC)	1 to 3 weeks	Enterprise buyers often require it
Encryption at rest and in transit, documented	Days to 1 week	Usually already in place; needs evidence
Backups with a tested restore, documented	1 week	Restore evidence is regularly requested
Centralised logging and alerting	1 to 3 weeks	Required for incident questions
Independent penetration test and fixes	2 to 6 weeks	Asked for by most buyers, usually annually
Written incident response plan with a tabletop exercise	1 to 2 weeks	Needed for CPS 234 notification clauses
Subprocessor list and data flow diagram	Days	Answers a whole section at once
Trust page and security pack	1 to 2 weeks	Shortens every later review

How AWLabs approaches this

When we build or maintain SaaS products, we build these controls in and produce the evidence as we go, so the security pack reflects how the system actually works. For an existing product, our cybersecurity work starts with the last two or three questionnaires you struggled with, maps the gaps, and sets out the fixes in a fixed price Schedule of Work with three options: The Minimum, The Recommended and The Complete. We don’t hold SOC 2, ISO 27001 or IRAP status ourselves and can’t certify you; we help you meet the controls and gather evidence for your auditor.