BCG's Casey online case is a timed business case you solve alone with a chatbot before the live case interviews. BCG's candidate guide describes 8 to 10 multiple-choice, short-answer and fill-in questions, about 35 minutes of casework and a one-minute recorded video recommendation at the end, though several office pages say 30 minutes and some describe a different test entirely. On scoring, BCG says only that you won't see your score and that questions can carry different weights. It hasn't published a pass mark.

Soreno isn't affiliated with Boston Consulting Group. Every process fact here comes from BCG's careers pages or the candidate guide BCG links from its Mexico page. We read them on October 1 and checked them again in early October 2026.

What is known and not known (as of October 2026)

Stated by BCG

Casey is a chatbot that guides you through an interactive business case. BCG says it simulates a case interview and evaluates problem-solving and analytical skills (Mexico page).
A US candidate who gets it is "a select group" invited about two weeks after the application deadline, and the case takes about 35 minutes (US Associate page).
The candidate guide gives the format, timing and rules covered below, and says you won't receive your final score, that scoring varies by question type, and that each question may carry a different weight.
BCG says AI is never used to make hiring decisions and that recruiters and hiring managers decide. It also encourages using AI to prepare, including practicing interview questions, as long as your application stays authentic (responsible AI in hiring, using AI in your application).

Not published, as far as we could find

A pass mark, a score breakdown or the weight of each question.
Whether answers are marked by people, by software or by both. BCG's statement that AI never makes hiring decisions doesn't say how Casey's answers are scored.
What the one-minute video is judged on, and how much it counts.
How many candidates pass. Figures like "about 30%" on prep sites aren't from BCG.
Which industry your case covers. Mexico says only that it can be any industry or practice area.
Whether AI assistance is allowed during the online case. We found no BCG page that permits it, and the guide says the session is recorded to detect tab switching and copy-paste. Treat it as solo work.

What BCG says the online case is

BCG Mexico has the clearest definition: "The Online Case Experience (OCE) is an interactive exercise where you solve a business case guided by Casey, a chatbot." It says you prepare as you would for a case interview, and that "The OCE takes approximately 30 minutes to complete, and everything is conducted in English."

The Argentina page (Chile, Colombia, Panama and Peru use the same wording) says the online case tests quantitative skills, data interpretation, calculations and business logic, with 30 minutes and then a recorded 1-minute video with the final recommendation. The Kazakhstan page calls it a mix of qualitative questions, business logic and analytical problem solving.

The US MBA page lists it for full-time MBA applicants except those whose first office choice is in Canada. The Associate page says candidates who have taken the online case before aren't prompted to take it again.

How the Casey screen works, per BCG's candidate guide

Under the OCE answer, BCG Mexico links a 17-page PDF, "BCG Online Case Assessment: User reference guide & helpful tips," marked 2024. It is the most detailed official description we found.

Casey online case timeline per BCG's candidate guide: intro video, about 35 minutes of 8 to 10 questions, then 5 minutes for a 1-minute video

The case has 8 to 10 questions followed by a video response. Questions are multiple choice, short answer or fill-in.
Total time is about 40 minutes: a short intro video, 35 minutes for the case, then the video question.
For the video, you get 5 minutes to read the question, prepare and record a one-minute answer, with a single attempt. BCG tells you to start recording at least 2 minutes before the 5-minute timer runs out.
You can't go back or change earlier answers, and you work through the questions in order.
You need a webcam laptop and a calculator, not a phone. Your webcam records the session, after you consent, to flag tab switching, copy-paste and extra faces.
The timer keeps running if you drop out, though you can log back in where you left off.
BCG recommends a practice case first. The link comes in your invitation email, sent by HireQuotient on BCG's behalf.

In the guide, cost of goods sold is variable and operating expenses are fixed unless stated otherwise, and "profit" means operating profit. Its glossary works an expected-profit example, so be ready for probability-weighted questions.

What each BCG office page says

Offices don't describe the screen the same way, and some describe a reasoning or numerical test instead of a case. Your invitation email is the final word on which test you are taking.

Office page	What BCG calls it	Length	What BCG says it tests or includes
Mexico	Online Case Experience, with Casey	About 30 minutes, in English	Problem-solving and analytical skills. Associates also take the CCA
Argentina and four neighbors	Online Case Experience	30 minutes plus a 1-minute video	Quantitative skills, data interpretation, calculations, business logic
Kazakhstan	Online Case Experience	Not stated	Qualitative questions, business logic, analytical problem solving
US Associate, US MBA	Online case	About 35 minutes	Not described. A Consulting Career Assessment comes first
Sweden internships	Online business case plus Logical Reasoning Test	Reasoning test: 80 questions in 30 minutes	Business case not described here
Brazil	Prova Online (Portuguese)	75 minutes	GMAT-style, business case and English sections
Netherlands	Online Reasoning Test	Not stated	Interpreting graphs, quantitative conclusions, calculations
United Kingdom	Short numerical assessment	Not stated	Not described

Don't confuse Casey with the Consulting Career Assessment (CCA). BCG's CCA FAQ for Mexico applicants (updated December 2024) says it is built by SHL, takes 30 to 35 minutes, measures cognitive and behavioral traits, and needs no preparation.

How to prepare, step by step

Read your invitation and the guide. Confirm which test you have. If it's the Casey-style case, read the linked candidate guide twice.
Take BCG's practice case before the real one. It is linked in your invitation email and gets you comfortable with the chatbot and video screen.
Check your setup a day early. Use a laptop with a webcam and a calculator, Chrome, no VPN or ad blocker, and close video-call apps, all from BCG's technical FAQ.
Drill the math. Practice percentages, margins, break-even math and expected value until a three-step calculation takes under two minutes. See also mental math drills.
Practice reading a table. Look at an exhibit and write its one-sentence takeaway before you calculate anything.
Train the pacing. Budget 3 to 4.4 minutes a question (below), and use the guide's progress bar, which moves by expected time per question, as your gauge.
Record ten one-minute recommendations on your phone and watch them back. Lead with the answer, give two reasons, name one risk.
Run a few live-style cases. Casey is a case interview in chat form, so your structure and business sense carry over. Our BCG case interview guide covers the live rounds that follow.

How to pace 8 to 10 questions

At 30 minutes for 10 questions you have 3 minutes each. At 35 minutes for 8 questions you have about 4.4. Give multi-step calculations more of it than quick multiple-choice questions. If the timer says half your time is gone and the progress bar shows 35%, you're behind. Since you can't go back, a quick sanity check before each submit is worth more than speed on the next question.

A Casey-style practice set (ours, fictional)

This set is ours, built to mirror the question types BCG describes. It isn't BCG's material, and the company and numbers are made up. Assume all subscribers start in January and remain for the full year, with one bike per subscriber. Use a calculator, as the guide requires.

Prompt. Vela, an e-bike maker, wants to launch a monthly bike subscription in one of three cities next year. The CEO wants the city with the highest Year 1 operating profit.

Exhibit: Year 1 estimates by city

City	Target households	Expected sign-up rate	Monthly fee	Variable cost per subscriber per month	Annual fixed cost
Aston	200,000	2.0%	$60	$35	$900,000
Brenford	120,000	4.0%	$50	$30	$800,000
Calder	300,000	1.0%	$70	$40	$700,000

Suggested time budget (30 minutes, then the 5-minute video section): read the prompt and exhibit 3, Q1 2, Q2 4, Q3 6, Q4 5, Q5 6, reserve for checks 4, then Q6 the video (5 minutes, 1 to record).

Q1 (multiple choice). Vela's CFO says, "Calder is obvious, it has the most households." Which response is best?

A) Agree, since the biggest market yields the most profit.
B) Households only matter with sign-up rate, margin per subscriber and fixed cost, so compare profit by city first.
C) Disagree, Brenford has the highest sign-up rate, so it wins.
D) Pick the city with the lowest fixed cost.

Q2 (fill-in). Fill in Aston's Year 1 operating profit, in thousands of dollars.

Q3 (multiple choice). Which city has the highest Year 1 operating profit? A) Aston B) Brenford C) Calder D) Can't tell without competitor data.

Q4 (fill-in). Calder's council will vote on a rule capping each operator at 2,000 subscription bikes. Vela puts the chance it passes at 40%. Fill in Calder's expected Year 1 operating profit, in thousands.

Q5 (short answer). In two or three sentences: is Brenford's forecast safe enough to bet on?

Q6 (video). Give the CEO a one-minute recommendation.

Answers

Q1: B. Profit is subscribers times annual margin, minus fixed cost.

Q2: 300. Subscribers are 200,000 × 2.0% = 4,000. Monthly margin is $60 − $35 = $25, or $300 a year. Contribution is 4,000 × $300 = $1.2 million. Minus $900,000 fixed cost, profit is $300,000.

Q3: C. Brenford: 120,000 × 4.0% = 4,800 subscribers × ($20 × 12 = $240) = $1,152,000, minus $800,000 = $352,000. Calder: 300,000 × 1.0% = 3,000 subscribers × ($30 × 12 = $360) = $1,080,000, minus $700,000 = $380,000. Calder wins with the fewest subscribers, because its margin is highest. Option B in Q1 was the trap.

Q4: 236. With the cap, Calder serves 2,000 subscribers: 2,000 × $360 = $720,000, minus $700,000 = $20,000. Expected profit is 60% × $380,000 + 40% × $20,000 = $228,000 + $8,000 = $236,000. That's now below both Brenford ($352,000) and Aston ($300,000).

Q5, a model answer: "The forecast has a cushion, but that alone doesn't make it reliable. Brenford breaks even at about 3,334 whole-year subscribers, a 2.8% sign-up rate against a 4.0% forecast. I'd test demand before committing." The math: 3,333.3 ÷ 120,000 = 2.78%, and (4.0 − 2.78) ÷ 4.0 = 31%.

Q6, a model script (about 100 words): "I recommend launching in Brenford. On base-case numbers Calder looks best at $380,000 of Year 1 operating profit, but there's a 40% chance the council caps it at 2,000 bikes, which would cut Calder's profit to $20,000. Weighted for that risk, Calder is worth $236,000, below Brenford's $352,000. Brenford also has room for error: it breaks even at a 2.8% sign-up rate against a 4.0% forecast. The main risk is that forecast, which is twice Aston's rate, so before signing the depot lease I'd run a pre-registration campaign to test demand. If the council rejects the cap, I'd reassess Calder using the latest demand and cost estimates."

Where Soreno fits

Soreno doesn't simulate Casey or any chat-based online case, so use BCG's own practice case for the format. Soreno helps with the skills under it and the rounds after it: timed consulting math and chart drills, and voice mock cases where an AI interviewer shows exhibits, pushes back and grades you on a rubric. There is a free sample case, no account needed, on the case interview partner page. See the comparison page and pricing; every plan starts with a 7-day free trial. If you face McKinsey next, read our guide to its AI interview and Prep Tool.

FAQ

What is the BCG Casey online case? A chatbot-guided business case that BCG sends to select candidates. BCG says it simulates a case interview and evaluates problem-solving and analytical skills.

How long is it? BCG pages say about 30 minutes (Mexico, Argentina and neighbors) or about 35 minutes (US). The candidate guide describes 35 minutes for the case plus a 5-minute video section, about 40 minutes in all.

How is it scored? BCG hasn't published a rubric or pass mark. Its guide says you won't see your score and that each question may carry a different weight.

Is the video recommendation scored? BCG's pages say you record a one-minute video with your final recommendation. We found no statement about how it is judged.

Can I go back to earlier questions? No. The guide says answers are final and you work in order.

Can I use AI during the online case? We found no BCG page that allows it, and the guide says your session is recorded to detect tab switching and copy-paste. BCG does encourage using AI to prepare.

Do all BCG offices use Casey? No. Some offices describe a reasoning, numerical or GMAT-style test instead. Check your invitation.

How do I practice? Take BCG's practice case from your invitation, drill math by hand and with a calculator, and rehearse one-minute recommendations. The practice set above is a start.