Ecommerce profit is the revenue remaining after the costs included in the calculation are deducted. For a monthly estimate, subtract product costs, fulfillment, payment and marketplace fees, advertising, refunds and fixed monthly expenses from sales revenue. Use figures from the same period.
How to Calculate Ecommerce Profit
Use this guide alongside the interactive calculator above. It explains the calculation, the assumptions behind the result and the practical checks to make before using the estimate in a business decision.
Formula used by this calculator
Monthly net profit estimate = Revenue − Product costs − Fulfillment − Fees − Advertising − Refunds − Monthly fixed expenses. Profit per order = Monthly net profit estimate ÷ Orders. Break-even ROAS = Revenue ÷ Contribution before advertising, when contribution before advertising is positive.
Worked example
If monthly revenue is $10,000 and all entered costs total $6,900, estimated monthly profit is $3,100. With 200 orders, estimated profit per order is $15.50.
Revenue is not the same as profit
An online store can generate substantial sales and still have a small or negative profit. Product acquisition, packaging, shipping, fulfillment, payment processing, marketplace commissions, advertising, refunds and recurring overhead all affect what remains. Revenue tells you how much was sold; profit estimates what is left after the costs included in the calculation.
A useful monthly review brings revenue and expenses together for the same period. Mixing one month's revenue with a different month's advertising or fulfillment costs can distort the result. Decide whether your figures are based on orders placed, orders shipped or payments settled, and use a consistent approach when comparing months.
Understand each cost category
Product costs represent the inventory or production cost associated with the sales in the period. Fulfillment includes shipping and handling costs you want to include. Fees cover payment processing and marketplace charges. Advertising is the marketing spend for the period. Refunds and returns should reflect the amounts you want to deduct from the period's performance, while monthly fixed expenses cover recurring overhead such as software or rent.
Avoid double-counting. If a fulfillment provider's invoice already includes packaging, do not add the same packaging expense again elsewhere. If product cost is already net of returned inventory, make sure the refunds input does not subtract the same amount twice. Document how your business treats refunds, chargebacks, taxes and shipping revenue.
How to use the Fincelio Ecommerce Profit Calculator
Enter sales revenue and the number of orders for one month or another clearly defined period. Add product costs, shipping and fulfillment, payment and marketplace fees, advertising spend, refunds and returns, and monthly fixed expenses. Keep every amount in the same currency and use a consistent period.
The calculator estimates monthly net profit, profit per order and net profit margin. It also estimates break-even ROAS from revenue and contribution before advertising. This is a simplified model based on the inputs shown; it is not a replacement for a profit-and-loss statement or accounting system.
What break-even ROAS means
Return on ad spend (ROAS) compares attributed revenue with advertising spend. Break-even ROAS estimates the revenue-to-ad-spend ratio required for advertising to cover its cost after the other entered costs are considered. In this calculator, contribution before ads is revenue minus product costs, fulfillment, fees, refunds and overhead. The result is only available when that contribution is positive.
ROAS is not the same as profit margin or return on investment. A campaign can show a high revenue-to-ad-spend ratio and still be unprofitable if product costs, fulfillment, refunds or overhead are high. Attribution also matters: use a consistent reporting window and understand whether platform-reported revenue overlaps across channels.
Read the results carefully
Monthly net profit is the total remaining after the entered costs. Profit per order divides that amount by the number of orders, so it is an average across the period rather than the profit from every individual order. Net profit margin expresses estimated profit as a percentage of revenue. If revenue is zero, a margin percentage cannot be calculated.
The tool does not automatically include every possible cost. Depending on your business, you may need to account separately for salaries, storage, software, taxes, financing, depreciation, owner compensation or one-off expenses. The monthly fixed-expense input can include appropriate overhead, but keep your records clear so you know what has been included.
Build a useful monthly review
Compare the current month with prior periods and investigate changes rather than looking at one headline number. Check average order value, order volume, product cost, fulfillment cost per order, fee rate, refund rate and advertising efficiency. A change in product mix can affect margin even when total revenue rises.
Use the result to guide questions: Are shipping costs rising? Are discounts reducing realized revenue? Are returns concentrated in one product? Is advertising bringing customers at a sustainable cost? Pair this tool with the Selling Price Calculator for product-level pricing and the Profit Margin Calculator for an individual sale.
Frequently asked questions
What is the ecommerce profit formula?
Subtract product costs, fulfillment, fees, advertising, refunds and fixed expenses from revenue for the period being analyzed.
What costs should an online store include?
Common costs include inventory, packaging, shipping, fulfillment, payment and marketplace fees, advertising, refunds, software and other overhead.
How is profit per order calculated?
Divide the estimated profit for the period by the number of orders in that same period.
What is break-even ROAS?
It is the estimated revenue-to-ad-spend ratio needed for advertising to cover its cost after the other modeled contribution costs.
Does this replace accounting software?
No. It is a planning estimate based on manually entered figures and does not produce a complete set of accounts or tax records.
Related Fincelio calculators
These calculations are educational estimates based on the values and assumptions entered. They do not replace accounting, tax, customs or legal advice. Verify important decisions against your business records and applicable professional guidance.