Current month
Selling price per unit $25.00
+$0.00 vs. current month
- Revenue
- $10,000.00
- Total costs
- $6,600.00
FREE CALCULATOR
Monthly business profit calculator
When reviewing a month or planning the next one, subtract unit costs, fees, and overhead from revenue and compare pre-tax profit scenarios.
Your numbers
Start with the example, then make it yours.
Fees & advanced options
Include shipping and packaging in unit cost only once. Percentage fees apply to revenue; a fixed fee applies to each unit sold. One unit is treated as one transaction.
Changes the unit only. No exchange-rate conversion.
Saved in this tab only. Reset clears saved inputs.
Your results
ProfitPilotEstimated operating profit · before tax$3,400.00
- Revenue
- $10,000.00
- Total costs
- $6,600.00
- Operating margin
- 34%
Where the revenue goes
- Variable costs
- $4,000.00
- Transaction fees
- $600.00
- Monthly fixed costs
- $2,000.00
- Profit
- $3,400.00
Taxes, refunds, inventory timing, financing, and owner pay are excluded unless you enter an applicable operating cost. Profit is not cash flow.
Amounts are rounded for display; calculations use the full values. Round a target price up to your currency’s smallest unit before selling.
THE WHAT-IF CORNER
What if you changed one thing?
Compare small changes with your current month, instantly.
+10%
Selling price per unit $27.50
+$960.00 vs. current month
- Revenue
- $11,000.00
- Total costs
- $6,640.00
+20%
480 units
+$1,080.00 vs. current month
- Revenue
- $12,000.00
- Total costs
- $7,520.00
−10%
Cost per unit $9.00
+$400.00 vs. current month
- Revenue
- $10,000.00
- Total costs
- $6,200.00
Scenarios change one assumption at a time. A price increase assumes unchanged sales volume; this is not a forecast of customer demand. Scenario quantities are rounded up to whole units.
Behind the numbers
Behind the numbers
Revenue = selling price × monthly quantity
Variable costs = unit cost × monthly quantity
Fees = revenue × fee rate + quantity × fixed fee
Operating profit = revenue − variable costs − fees − fixed costs
Operating margin (%) = operating profit ÷ revenue × 100
Rates in formulas are decimals: 30% is calculated as 0.30.
A practical example
From $10,000 in sales to $3,400 in profit
An online seller sells 400 units at $25 with $10 unit costs, a 4% payment fee, a $0.50 fixed fee, and $2,000 monthly overhead. Revenue is $10,000; costs total $6,600; estimated pre-tax operating profit is $3,400, a 34% margin.
What this includes
- Results are pre-tax operating estimates for one product or an average unit. Sales tax / VAT and income tax are not calculated.
- Owner pay, refunds, spoilage, and advertising are included only if you enter them in an appropriate cost field. One unit is treated as one transaction.
- Inventory purchases, payment timing, loan repayments, and capital spending are not modeled. Operating profit is not cash flow.
- Scenario comparisons change only one input at a time and hold all others constant. They are sensitivity checks, not demand forecasts.
Common questions
Where do I include advertising or owner pay?
A flat monthly ad budget or salary can go in fixed costs. A per-order acquisition cost can go in unit cost. Pick one place for each expense so it is not counted twice.
What if I sell several different products?
Use a separate calculation for each product, or a weighted average price and variable cost for a stable sales mix. Changing the mix can change your actual margin.
Does raising prices always improve profit?
Only under the assumptions entered. Our price scenario keeps quantity unchanged. Real customers may buy fewer units; adjust the main quantity input to explore that possibility.