How long does a security questionnaire take? (And how to make the next one faster)

The honest answer is: it depends on three things. How long the questionnaire is, how much of your security setup is already written down, and how many people you need to ask. Here is a simple way to estimate it, and what changes the number.

A simple estimate

Multiply the number of questions by the minutes an answer takes. If finding the facts and writing a good answer takes about 3 minutes per question, a 150-question questionnaire is 450 minutes: 7.5 hours of focused work.

Your own number may be very different. A short questionnaire about a product your team knows well goes faster; a long one with evidence to attach, or questions about areas nobody owns, goes slower. Try your own numbers in our free questionnaire cost calculator.

Why the calendar time is longer

Focused hours are only part of it. The days add up because of:

• Finding information: the answer is in a policy somewhere, or in someone’s head.
• Waiting for colleagues: the engineer who knows how backups work is busy shipping.
• Rewriting answers you have written before, slightly differently, because last time’s answers are in an old email.
• Formatting: dropdowns, comment columns, copying answers into the right cells.
• Review: someone has to read the whole thing before it goes back to the customer.

What makes the next one faster

1. Keep an answer library. Every approved answer, with the question and the document it came from. Most new questions are old questions in new words.
2. Write down the core facts once: hosting, regions, encryption, MFA, backups, who has access. These answer a large share of every questionnaire.
3. Name one owner per questionnaire, who knows who to ask for each section.
4. Triage first. Answer everything you know in one pass, then send a short, specific list of questions to colleagues instead of the whole spreadsheet.
5. Keep your standard documents ready to send: security policy, subprocessor list, penetration test summary if you have one.
6. Answer in their file. Don’t rebuild their spreadsheet; fill in the one you received.

Where the time goes with Rendro

Rendro drafts every answer from your documents and past answers, with the source next to it, and flags the questions your documents don’t cover. Your time moves from writing to reviewing: you read each draft and its source, approve it or fix it, and spend real effort only on the flagged questions. Approved answers are saved, so each questionnaire leaves less to do on the next one.