Real grading
Type your answer like you would in the interview. You get a score and specific gaps, not a generic explanation.
IB technical prep for engineers
Learn to answer finance questions the way interviewers expect.
Engineers often know the material but struggle to say it clearly under pressure. Circuit Capital is free practice with grading, drills, flashcards, and mental math.
- No credit card
- No paywall
- Built for career switchers
Practice session
Question 4 / 10 · Accounting
Depreciation increases by $10. Walk through all three statements. 40% tax rate.
Your answer: NI down $6, add back D&A on CFS, PP&E and cash on BS…
Score 8/10Missed: tax shield wording
- 300+
- Practice questions
- 6
- Coverage modules
- Free
- No paywall, ever
You practice answering, not memorizing letters on a screen.
Most sites show you the solution and move on. Here you submit a response, see what you missed, and repeat until the logic is solid. Same study loop you used for hard engineering courses, applied to technical interviews.
What's inside
AI tutor
Ask follow-ups when a concept clicks on paper but not in practice. Short, technical, no fluff.
Spaced repetition
Questions you miss come back until the mechanics are automatic.
Mental math
Build speed for percentages, valuation checks, and finance arithmetic under pressure.
Modules
Coverage from three-statement linkages through DCF, M&A, LBO, and BIWS-style drills.
- Accounting and three statements
- Equity value and enterprise value
- Valuation and DCF
- M&A and merger models
- LBO mechanics
- BIWS-style question bank
Shayan Mardaneh
Electrical engineering · Queen's University
About
I built Circuit Capital while trying to make the move from engineering into finance myself.
I'm an electrical engineering student at Queen's recruiting for investment banking, and one of the biggest challenges was not the technical concepts themselves, but learning how to explain them clearly under pressure and compete in a recruiting process that can feel extremely intense and unstructured coming from a non-traditional background.
Balancing engineering while learning finance on the side was overwhelming at times, and a lot of the best prep resources were either expensive or assumed you already knew the basics.
I built Circuit Capital to make that process easier. The platform is free because I do not think students should have to spend hundreds of dollars just to practice technicals, get feedback, and prepare properly for interviews.
If you are trying to break into finance from engineering or another technical background, I hope this helps make the process a little less difficult than it was for me.