Cornerstone Diagnostic Consulting

Precision financial diagnostics that turn clarity into stronger cash flow and higher profitability.

Meet The Analyst Behind Cornerstone

I am Stephen Yin, a Los Angeles-based finance leader with more than 20 years in corporate finance, a Mathematics degree from UCLA, and an MBA in Finance from UC Irvine. I built Cornerstone to give California owners disciplined, plain-language diagnostics that finally make their numbers useful.

Learn My Approach

Reveal Hidden Profit Leaks

I analyze your numbers to expose waste, weak margins, and cash strain.

See How

Strategic Planning That Drives Profit

I convert diagnostic findings into a clear, prioritized roadmap for profit-focused growth.

Plan Next

Tax Strategy Optimization

I align structure, timing, and deductions so you legally keep more cash.

Reduce Taxes

AI Diagnostics

I use AI to scan your data and uncover costly hidden patterns before they drain your profitability and stall business growth.

Corporate Rigor

I bring Fortune 500 financial discipline into lean, practical small-business strategies that drive measurable profitability.

Consulting Clarity

My structured consulting process translates messy small-business numbers into clear, step-by-step profit and cash flow moves.

Clarity Starts With Diagnostics

If you are working hard but still not sure where the money goes, you are not alone. I use AI-driven financial diagnostics to pinpoint leaks, margin issues, and cash flow stress, then turn the findings into simple, prioritized actions so you can protect profit, steady cash, and plan ahead with confidence.
Explore Services
Merchant PoliciesLegal Notice
Powered by