Accounting Gross Profit Margin (Monthly) Calculator
Calculate your monthly gross profit and gross profit margin from sales revenue and direct costs.
Overview
This monthly gross profit margin calculator shows how much sales revenue remains after direct materials, direct labour, and other direct costs. Enter figures for one consistent month to estimate gross profit, total direct costs, and the percentage of revenue retained.
How it works
The calculator adds direct materials, direct labour, and other direct costs to calculate total direct costs, often called cost of goods sold or cost of sales. It subtracts those costs from monthly revenue to find gross profit. Gross profit margin is then calculated by dividing gross profit by monthly revenue and multiplying by 100. A higher margin generally means more revenue is available to cover operating expenses and profit, but the appropriate margin varies by business and industry.
How to use this calculator
- 1Enter your total sales revenue for the month.
- 2Add direct material, inventory, or purchase costs.
- 3Enter direct labour costs associated with delivering sales.
- 4Include any other costs directly tied to sales.
- 5Review your gross profit and gross profit margin.
Example Calculation
Monthly sales revenue
$50,000
Direct materials or purchases
$15,000
Direct labour costs
$10,000
Other direct costs
$5,000
Gross profit margin
40.0%
With monthly revenue of 50,000 and total direct costs of 30,000, gross profit is 20,000 and the gross profit margin is 40.0%.
Frequently asked questions
What is monthly gross profit margin?
Monthly gross profit margin is the percentage of sales revenue remaining after direct costs of producing or delivering sales are deducted for that month.
How do you calculate gross profit margin?
Subtract direct costs from revenue to get gross profit. Then divide gross profit by revenue and multiply by 100.
What costs should be included in gross profit?
Include costs directly linked to the products or services sold, such as materials, inventory purchases, production labour, subcontractors, and sales-related delivery costs where appropriate.
Are rent and office salaries included in gross profit margin?
Usually no. Rent, general administration, marketing, and office salaries are normally operating expenses rather than direct costs, although accounting policies can differ.
Can gross profit margin be negative?
Yes. A negative margin means direct costs were greater than sales revenue for the month.
Why might my margin change from month to month?
Changes in selling prices, discounts, product mix, supplier costs, labour efficiency, returns, and the timing of revenue or cost recognition can all affect the monthly margin.
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Assumptions and warnings
Assumptions
- All revenue and direct costs relate to the same monthly accounting period.
- Direct costs are limited to costs that can be directly linked to goods or services sold.
- Operating expenses such as rent, administration, marketing, and interest are excluded from gross profit.
- Results are estimates and depend on accurate revenue recognition and cost allocation.
Warnings
- This calculator provides an estimate for business planning and is not accounting, tax, or financial advice.
- Accounting treatment of inventory, returns, and cost allocation can affect reported gross profit.