#financial-ratios
Financial Ratios
Key financial ratios like ROA, ROE, and profitability metrics for measuring business performance
The Altman Z-Score: A Five-Ratio Early Warning System for Business Failure
The Altman Z-Score combines five financial ratios into one number that predicted bankruptcy with 72% accuracy two years out. This guide covers the original formula, the Z' and Z'' versions for private and non-manufacturing firms, a worked example, and how to screen your own company, customers, and suppliers.
Why Profitable Businesses Run Out of Cash: The Cash Conversion Cycle, Explained
A worked guide to the cash conversion cycle and the three working-capital levers — DIO, DSO, and DPO — with industry benchmarks, the Amazon and Dell negative-CCC playbook, and the bookkeeping foundation small businesses need to shorten the gap.
The Cash Conversion Cycle: How Small Businesses Free Cash Trapped in Operations
A practical walkthrough of the cash conversion cycle (DIO + DSO − DPO) for small businesses — how to calculate each component, what counts as a healthy CCC by industry, and the order to pull the three levers that free trapped working capital without breaking supplier or customer relationships.
Operating Leverage and the Degree of Operating Leverage (DOL): Why a 10% Revenue Drop Can Eat 30% of Your Profit
Two businesses with identical revenue and operating income can react very differently to the same 10% sales decline. This guide explains the three DOL formulas, walks through a worked SaaS example, identifies which industries carry the highest operating leverage, and lays out a five-step stress test for your own cost structure.
DuPont Analysis Demystified: How to Decompose Return on Equity Into the Three Levers Owners Actually Control
A practical guide to DuPont Analysis — how to split return on equity into net margin, asset turnover, and the equity multiplier (3-step), or further into tax and interest burdens (5-step), with worked examples, trade-offs, and the pitfalls that catch people who apply it mechanically.
Markup Versus Margin: The Pricing Math Small Businesses Get Wrong
A 50% markup is a 33.3% margin, not a 50% margin — markup divides profit by cost, margin divides it by selling price. This guide gives the conversion formulas, a reference table, and shows how the mix-up quietly costs small businesses thousands.
SaaS Revenue Metrics: Building the MRR Waterfall and Reading What It Says About Growth
A 2026 reference for SaaS founders on calculating MRR and ARR, decomposing the five-bucket recurring-revenue waterfall, interpreting NRR/GRR, and reconciling subscription metrics to GAAP revenue under ASC 606.
The Rule of 40 for SaaS Founders: Calculation, Benchmarks, and When to Ignore It
The Rule of 40 says a healthy SaaS company's revenue growth rate plus profit margin should clear 40%. This guide covers how to calculate it, which margin metric to use, 2026 benchmarks (median score around 12%), the Rule of X variant, and when the rule does not apply.
Loan Covenants for Small Business Borrowers: How DSCR, FCCR, and Tangible Net Worth Decide When a Performing Loan Can Be Called
Loan covenants—DSCR, fixed charge coverage, tangible net worth, and leverage limits—can put a small business borrower in default while every payment is current. A practical breakdown of affirmative, negative, and financial covenants, cure periods, waiver requests, and what to negotiate before signing a credit agreement.
AR Days Formula Explained: Calculate, Benchmark, and Improve Your Cash Flow
AR Days (DSO) measures how long it takes to collect on credit sales. A practical guide to the formula, industry benchmarks from 1–5 days for retail to 70–120 days for construction, common calculation errors, and seven tactics that reduce collection time.
Days Payable Outstanding (DPO): The Complete Guide to Measuring and Optimizing Payment Cycles
Days Payable Outstanding measures the average number of days a company takes to pay suppliers. This guide covers the DPO formula (Average AP ÷ COGS × Days), industry benchmarks from 15 to 70 days, the 37% annualized return from 2/10 net 30 discounts, and seven strategies to optimize payment cycles without damaging vendor relationships.
Sales-to-AR Ratio: The Cash Flow Metric Quietly Strangling Small Businesses
The sales-to-AR ratio measures the share of revenue stuck in unpaid invoices. This guide explains how to calculate it, what good looks like by industry, and how to drive it down within one or two quarters.