What This Cheat Sheet Actually Is
A Cheat Sheet For Finance Easy is just a one-page or few-page reference that consolidates the most-used formulas, ratios, and concepts you need when working with financial data. That's it. No fluff, no chapters. People make them complicated because they want to include everything, and then the sheet becomes useless because nobody can find anything on it. I built my first version back in grad school. It was three pages of net present value formulas, WACC calculations, and break-even analysis. My professor spent five minutes going through it and said, "Why are there formulas on here you'll never use?" I'd included standard deviations and t-tests from a statistics course. He was right. I cut it down to one page after that. The versions that actually get used are the ones someone will pull out during a live deal or a last-minute exam prep, not the comprehensive textbook summary.
Core Sections You Need
Start with time value of money. This is where everyone goes wrong. Put the present value formula, future value formula, annuity formula, and perpetuity formula on the same line with their variables clearly labeled. Don't write them out in sentence form. You need to see PV = FV / (1 + r)^n at a glance, not read a paragraph explaining what PV means. The PVIFA and FVIFA tables are also worth including if you work with annuities regularly, though most people just use a financial calculator for those now. Next section should be valuation multiples. P/E, EV/EBITDA, P/B, P/S. Keep the formulas tight. EV = Market Cap + Total Debt - Cash is the one most people botch because they forget to add minority interest and preferred stock to the debt portion. I learned that the hard way during my second summer at an investment bank when I built a comparable companies model that came out roughly 8% off because I'd understated enterprise value on three of the peer transactions. The partner asked me to redo it. Took me forty-five minutes. Wasted an hour and a half of my day because of one line on a cheat sheet that didn't mention minority interest. Include the DuPont identity. Return on equity broken into net profit margin, asset turnover, and equity multiplier. It tells you immediately whether a company's ROE is coming from operational efficiency, asset utilization, or leverage. Most people just look at ROE and stop there. The DuPont breakdown separates the signal from the noise.
Cost of capital comes next. WACC formula with the tax-adjusted cost of debt clearly shown. Most cheat sheets write the debt portion as Rd(1-T). Make sure you specify that T is the marginal tax rate, not the effective tax rate. These can differ by several percentage points for companies with significant deferred tax assets or foreign operations.
Get the Full Details
What Most Cheat Sheets Leave Out
Option pricing basics. Black-Scholes doesn't belong on a one-pager, but the put-call parity relationship does. C - P = S - K*e^(-rt). It shows up in compensation analysis, M&A earnout structures, and capital budgeting problems involving real options. If you're doing any work with convertible securities or stock-based compensation, skip this and you'll spend more time deriving it than you would have writing it down initially. Break-even analysis. Both accounting break-even and financial break-even. The formulas are different and people conflate them constantly. Accounting break-even ignores the time value of money. Financial break-even requires discounting. Put both on the sheet with a note about which scenario each applies to. Working capital components. Current ratio, quick ratio, cash conversion cycle. The cash conversion cycle formula - Days Inventory Outstanding plus Days Sales Outstanding minus Days Payables Outstanding - is something you'll need to recalculate frequently. Having it memorized saves time, but having it written down accurately saves mistakes. I once watched a junior analyst miscalculate DPO by using average payables instead of ending payables. The discrepancy was small in absolute terms but it threw off their entire working capital forecast for the quarter.
How to Actually Use This Thing
The point of a cheat sheet isn't to memorize it. It's to reduce cognitive load when you're doing the actual work. Print it. Tape it to your monitor if you have to. The goal is that when you're building a model at 11 PM and you need to verify whether you set up the depreciation schedule correctly, you don't have to open three textbooks or search your browser. I keep a revised version on my desk still. It's gotten dog-eared. The WACC section has coffee stains on it. That's not a problem - that's evidence it's being used. If your cheat sheet looks pristine after six months, you're not using it. There's a version floating around called Cheat Sheet For Finance Easy that circulates in online forums and study groups. The best ones share a common trait: they're updated. Finance moves. Tax law changes. New accounting standards come out. A cheat sheet that doesn't reflect current GAAP or IFRS conventions will actively mislead you. I've seen people lose points on professional exams because the reference sheet they were using had outdated lease accounting rules pre-ASC 842.
The Limits
A cheat sheet won't teach you judgment. It can tell you the formula for calculating beta, but it can't tell you when to use industry beta versus company-specific beta, or when a regression period is too short to be meaningful. It can give you the formula for CAGR, but it won't explain why compound annual growth rates can be misleading for businesses with volatile earnings. Those come from experience, not from a one-pager. Also, don't over-rely on it during live situations. There's a difference between using a reference and hiding behind it. The people who seem fastest at financial analysis aren't the ones reading formulas off a sheet - they're the ones who've internalized the relationships enough to spot inconsistencies immediately. The cheat sheet catches the details. Your training catches the patterns. One more thing. If you're using this for an exam, check the rules first. Some certifications allow reference materials. Some don't. I know someone who brought a spreadsheet of formulas into a CFA session and got flagged. The sheet itself was fine. The policy was the issue.
