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Profit Margin vs. Markup: Formulas and Examples
Margin and markup describe the same gross profit from different denominators. That difference makes the percentages unequal and matters when setting prices.
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Business calculator guides
Focused explanations for the decisions behind the numbers. Each guide includes formulas, original examples, limitations, and direct links to the relevant calculators.
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Break-Even Analysis for a Small Business
Break-even analysis estimates the sales volume required for contribution from sales to cover fixed costs.
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ROAS vs. ROI: What Each Metric Measures
ROAS compares attributed conversion value or revenue with advertising cost. ROI compares net return with the broader investment cost.
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How to Calculate Profit Margin (Step by Step)
Profit margin divides profit by revenue. Which profit figure you use — gross, operating, or net — changes the answer and what it tells you.
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How to Calculate Percentage Change (Increase and Decrease)
Percentage change compares a new value with an old one using the old value as the base — using the wrong base is the single most common source of error.
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How to Calculate Commission (Flat, Tiered, and Split)
Most commission disputes come from an unclear structure, not bad arithmetic. Flat, tiered, and split commission each use a different formula.
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How to Price a Freelance Project When the Client Has No Budget
A client with no budget still consumes hours. Price from your annual cost floor, convert that into a scoped quote, and treat silence after a number as information.
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Break-Even Analysis Before You Quit Your Job
Resigning on a healthy-looking margin is still a cash decision. Model the monthly cost floor, the rate required to hit it, and how many sales stand between you and the paycheck you are about to give up.
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Why Your Profit Margin Looks Fine but Your Bank Account Doesn't
Margin is a ratio on a chosen cost set. Cash is what remains after inventory, tax, loan principal, and customers who have not paid. Those are different statements.
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How to Set a Markup That Covers Overhead Without Scaring Off Buyers
Markup is a pricing tool, not a profit report. Size it from the overhead you must recover, convert it to the margin you actually keep, and test whether buyers still see a fair unit price.
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Deciding Whether a Paid Campaign Is Worth Scaling
A 4x ROAS can lose money and a 2.2x ROAS can be worth scaling. Scale when incremental spend still clears contribution after the click path you actually have.
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When Customer Lifetime Value Makes a High CAC Acceptable
A $180 CAC can be correct for a $900 lifetime customer and reckless for a $220 one-time buyer. The ratio only works when both sides use the same economic unit and a time window you can fund.
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How Late Payments Quietly Destroy Freelance Cash Flow
A 2% monthly late fee on a $4,600 invoice is not the story. The story is the hours you cannot buy food with, the cheaper work you take to bridge the gap, and the rate that no longer covers the year.
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How to Tell If Your Hourly Rate Is Too Low for Your Actual Costs
A rate is too low when billed hours at that price cannot cover income, expenses, and tax on the hours you can actually invoice. Market averages do not override that floor.
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