Business calculators
Profit Margin Calculator
Find the percentage of revenue left after covering costs. Your inputs stay in this browser.
Live calculator
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What this calculator measures
Profit margin answers a pricing and mix question: of the revenue in this calculation, what share remains after the costs you chose to include. A cafe owner comparing pastry versus espresso, or a freelancer comparing two retainers, needs that share more than a raw profit dollar — $4,000 left on $8,000 and $4,000 left on $40,000 are not the same business.
The metric is misleading when the cost set does not match the decision. A 38% margin that subtracts only ingredients or only contractor invoices will look healthy while rent, ads, software, and tax still have to come from the remainder. It is also misleading across different volumes: a 50% margin on four jobs does not fund a month that needs twenty. Treat a high percentage as a signal to inspect mix and overhead, not as proof the bank account can spare a withdrawal.
The common manual mistake is to add a target margin to cost as if it were markup. A $80 cost and a 40% target margin requires a $133.33 price ($80 ÷ 0.60), not $112 ($80 × 1.40). The $112 price is a 40% markup and only a 28.6% margin. People then wonder why a month that hit the target percentage still cannot cover overhead.
Dana runs a small print shop. April sales are $18,400. Paper, ink, and a finishing contractor total $11,040. Margin is ($18,400 − $11,040) ÷ $18,400 = 40%. That 40% is a gross-style result. Rent, a part-time counter person, and ads add $4,200, so a broader operating-style margin on the same revenue is ($18,400 − $15,240) ÷ $18,400 = 17.2%. Dana can use 40% to decide whether a poster job is worth taking at a given paper cost. She should not use 40% to decide whether she can take $3,000 out of the account.
Formula
Inputs and variables
- Revenue
- Keep all money inputs in the same currency.
- Total cost
- Enter the money amount used by this formula.
How to use the calculator
- Choose a display currency when money fields are present.
- Enter values that cover the same period, scope, and currency.
- Review the result, formula, and worked example before using the estimate in a decision.
- Change one assumption at a time to understand what drives the result.
Worked example
- 1Dana's April sales are $18,400. Direct job costs are $11,040.
- 2Profit on that cost set is $18,400 - $11,040 = $7,360.
- 3$7,360 / $18,400 x 100 = 40% margin. Adding $4,200 of overhead drops the broader result to 17.2%.
How to interpret the result
Read the percentage only after you can name the cost set. A higher margin means more room inside that set, not more cash on hand. Volume, mix, tax, and payment timing still sit outside the formula.
Common mistakes and limits
- Adding a target margin to cost instead of dividing cost by one minus the margin.
- Mixing a monthly cost with annual revenue, or the reverse.
- Calling markup a margin when setting or quoting a price.
- Treating a healthy margin as money available to withdraw.
Frequently asked questions
Is a 20% profit margin good for a small business?
It depends which costs are inside the 20% and how much volume you need. A 20% gross margin on grocery-like products can be normal; a 20% margin after rent, payroll, and ads can be strong for a services shop and thin for a business that still has to fund inventory. Compare the same cost set to your own history before using a generic benchmark.
Why is my profit margin high but I still have no cash?
Margin ignores timing. Inventory buys, loan principal, tax remittances, and invoices not yet collected all leave the bank without changing a booked margin. Recalculate using only costs and revenue that share the same cash window, and do not treat unpaid invoices as spendable profit.
Should I use revenue or cost as the denominator?
Margin uses revenue. Markup uses cost. For the same $50 profit on a $150 sale, margin is 33.3% and markup is 50%. If you are judging what share of a sale you keep, use margin. If you are building a price from a known cost, convert a target margin with cost ÷ (1 − margin) rather than adding the percentage to cost.
Does a negative profit margin always mean I priced wrong?
It means the costs you included exceeded revenue for that scope. That can be a bad price, a one-off refund month, a job you took for a portfolio, or costs that belong to a different period. Recheck the time window and whether a large purchase was really a period expense before you cut every price.
Can I compare my margin to a competitor's published margin?
Only if you know they included the same kinds of cost. Public figures are often gross margin, sometimes net, and sometimes a blended number from a different product mix. Use this calculator to compare your products or months to each other on one definition, then treat outside benchmarks as context, not a target.