#profitability
Profitability
Analyze and improve business profitability with financial insights
Contribution Margin Explained: The Number That Tells You Whether a Sale Is Worth Making
Contribution margin is sales revenue minus variable costs — the per-unit number that drives pricing, break-even analysis, and product-mix decisions. Learn the formula, how it differs from gross margin, common calculation mistakes, and typical ratios by industry (70–90% for software, 25–50% for manufacturing).
Return on Invested Capital: The One Number That Tells You If Your Business Is Actually Worth Running
ROIC measures how efficiently a business turns debt and equity into after-tax operating profit — NOPAT divided by invested capital. Learn the formula, why it beats ROI and ROE, the WACC benchmark that separates value creators from value destroyers, and the five calculation mistakes owners make most.
Throughput Accounting and the Theory of Constraints: Find Your Business's One Real Bottleneck
Throughput accounting reduces business decisions to three numbers — throughput, investment, and operating expense — and argues that only fixing the single binding constraint, not cutting costs everywhere, increases how much money a business actually makes.
Economic Value Added (EVA) Explained: The Profit Metric That Charges for Capital
Economic Value Added (EVA) = NOPAT − (WACC × invested capital) — the profit left after every source of capital, debt and equity alike, is paid its going rate. A worked example, how to estimate NOPAT and WACC, why EVA avoids ROI's percentage bias, and how small business owners can use it for capital decisions.
Pet Waste Removal Business Bookkeeping: Route Density, Deferred Revenue, and the Real Unit Economics
Pet waste removal services gross $20–$45 per visit at ~50% gross and ~20% net margins, with top operators reporting $2M+ in annual revenue. This bookkeeping guide covers the metrics that actually decide profitability — revenue per route-hour, deferred revenue on prepaid subscriptions, and separating residential cash flow from invoiced commercial contracts.
GMROI Explained: The Gross Margin Return on Inventory Investment Formula and 2026 Benchmarks
GMROI measures gross profit generated per dollar of average inventory cost; a GMROI above 3.0 is generally strong, below 1.0 means inventory is destroying margin dollars, and typical category ranges run from 1.2 in grocery to 6.5+ in electronics.
LLM API Costs Are COGS, Not Overhead: A Gross Margin Guide for AI Wrappers
LLM inference is a variable cost of delivering your product, not software overhead — ICONIQ's 2026 data puts AI product gross margins at a 52% industry average, well below the 70-80% typical of traditional SaaS.
The Machine Shop Bookkeeping Guide: Job Costing, WIP, and Real Margins
Machine shops that track only labor and materials miss the two costs that decide whether a job is profitable — machine overhead and work in process — so aggregate revenue looks healthy while a third of jobs quietly lose money.
Mobile Car Detailing Bookkeeping: Chemical COGS, Mileage, and Equipment Depreciation
A $150 mobile detail costs $15-$20 in chemicals plus fuel, equipment wear, and unbilled quote time; tracking cost-per-job, the 72.5-cent 2026 IRS mileage rate, Section 179 equipment write-offs, and profit-per-drive-hour reveals whether a detailing business is actually as profitable as its revenue suggests.
Accounting for Vendor Rebates and Trade Spend Under ASC 606
Under ASC 606, cash rebates, slotting fees, and co-op advertising payments to a customer almost always reduce revenue rather than count as a marketing expense, unless the payment buys a distinct good or service at fair value.
Fitness Studio and Personal Trainer Bookkeeping: Deferred Revenue, Instructor Pay, and the KPIs That Matter
Prepaid training packages are a liability, not income — how fitness studios should use deferred revenue accounting, classify instructors under the FLSA economic-reality test, and track the KPIs, like the 70–75% class utilization benchmark, that separate profitable studios from struggling ones.
E-Bike and Scooter Rental Fleet Bookkeeping: Depreciation, Unit Economics, and Breakeven
Rental e-bikes and scooters are fixed assets, not inventory — and useful life ranges from under two months for early shared scooters to 2–3+ years for reinforced fleet hardware. How micromobility operators should structure a chart of accounts that separates batteries, theft, and field-ops labor, calculate contribution per vehicle per day, book damage deposits as liabilities, and find breakeven on blended seasonal utilization rather than peak-week numbers.