Short answer: 4–6 questions. If the decision is expensive and your sales rep can't work without details, up to 7–8, but every step past the sixth has to justify itself.
The long answer is more interesting, because the number itself is secondary. The right question sounds different: which items on that list actually change the offer you'll make to the customer? Everything else is the price of your curiosity, and you pay it in leads.
Why every extra question costs money
People don't abandon a quiz at random points. Drop-off accumulates at every step: part of the audience leaves at the first question, another part at the second, and so on. That's why the seventh question costs more than the third: by then you're working with a smaller audience, and you're losing a percentage of a smaller number.
Hence a practical rule: a question goes into the quiz only if its answer changes what you'll tell the customer. If your sales rep can ask the same thing over the phone in five seconds without losing anything, it doesn't belong in the quiz.
How to review each question
Go through your list of questions and ask three things about each one:
- Does it affect the price or the recommendation? Square footage, type of job, equipment do. "How did you hear about us?" doesn't: that's data for you, not for the customer.
- Does the customer know the answer right now? If people have to go calculate something or check with their partner, they won't: they'll close the quiz.
- Do you need the answer before the call, or can it be asked in the conversation? Anything that's easy to find out by talking is better asked by talking.
Usually, after this review, ten questions become five. That's the right length.
What those 4–6 questions must include
In most niches the set is the same:
- Type of job: what exactly the person needs.
- Scale: square feet, volume, quantity. The main price driver.
- Timeline: also separates people who are "just looking".
- Location: if you don't serve every area.
These four questions cover almost all of the qualification. Add the fifth and sixth based on your niche: budget in ranges, property condition, equipment.
When you can have more questions
Going past six steps is justified in two cases:
- An expensive decision with a long cycle. When tens of thousands of dollars are at stake, people are willing to spend a minute: they'll be researching the topic for weeks anyway.
- The quiz actually recommends an option. If people get a selection based on their parameters at the end, the extra question feels like part of that selection, not like a questionnaire.
And the opposite case: if you have one product and one scenario, 3–4 questions are enough. Making the quiz longer so it looks more serious is a sure way to lose leads.
What to do if you genuinely need lots of questions
That almost always means you're trying to serve several different needs with one quiz. The fix isn't trimming the list, it's branching it: the first question sorts people by area, and then each person sees only their own 4–5 steps. The overall questionnaire can be as long as you like, because no single person will see all of it. How this works is explained in the article on quiz branching.
The second option is to move some of the fields into the contact form on the last step instead of spreading them across questions.
What not to do
- Add questions "to get to know the customer better". It's the most expensive phrase in lead generation.
- Make budget the first question. The classic spot for mass drop-off: people haven't seen any value yet and you're already asking about money.
- Think it's all about quantity. One confusing question hurts conversion more than two extra questions that are easy to understand.
- Judge after ten visits. With small numbers, the difference between 8% and 12% is chance.
FAQ
What's the optimal number of questions in a quiz?
4–6 in most niches. Up to 7–8 if the decision is expensive and the sales rep can't move forward without details. 3–4 if there's one product and one scenario.
What matters more, the number of questions or the wording?
The wording. Mass drop-off almost always happens at one specific question that's confusing or asked too early, not "because of length in general".
How do I know if my quiz is too long?
Look at the intermediate steps. If drop-off is spread evenly across all questions and only a tiny share reaches the end, the quiz is too long. If it falls at one specific step, the problem is that step, not the length. More details in the article how to tell if your quiz is underperforming.
Can I use open-ended questions?
Yes, but sparingly: typing takes more effort than choosing an option, and drop-off is higher on open questions. One open field at the end is fine; three in a row isn't.
Does the contact form count as another step?
For the user, yes: they see it as one more screen. So count it when you calculate the length.
