eCommerce Profit Calculator

Key facts

• Net margin = net profit divided by revenue; most ecommerce brands land between 5% and 20%.
• Gross profit subtracts COGS, shipping, and platform fees; operating profit also subtracts ads and overhead; net profit subtracts tax.
• Break-even revenue = fixed costs divided by the share of each dollar kept after variable costs.
• The cash timeline shows profit and cash diverging: inventory is paid weeks ahead and platforms pay out days after the sale.

Last updated September 7, 2026. Fee presets, payout timing, and Onramp Funds eligibility and fee example checked against the published sources listed at the end of this page.

How to use the eCommerce profit calculator

Pick your primary sales platform and the fee and payout presets fill in (edit them to match your account), then enter a typical month of revenue and costs. The calculator separates gross profit (what is left after the direct cost of selling each order) from operating profit (after ads and overhead) and net profit (after tax). Change any input and the results update immediately.

• Cost of goods sold: product cost plus inbound freight and duties. Use landed cost, not the supplier invoice alone.
• Shipping and fulfillment: outbound postage, packaging, and 3PL or FBA pick-and-pack fees.
• Marketplace and payment fees: referral fees, payment processing, and app fees, entered as a percentage of revenue. Amazon referral fees run 8% to 15% for most categories, and card processing adds roughly 3% on DTC sites.
• Advertising spend: everything paid to acquire orders, including sponsored products, Meta, Google, and affiliates.
• Other operating costs: software subscriptions, salaries, rent, returns, and refunds.

What makes this calculator different

Every number on this page has a time dimension. Other calculators tell you whether something is profitable; this one also shows the cash timeline: when the money goes out, when the platform pays you back, the week your cash position bottoms out, and how much you need to cover the gap. Three other things worth knowing:

• Platform presets: choose Amazon, Shopify, Walmart, TikTok Shop, WooCommerce, BigCommerce, Squarespace, Shopline, or Stripe and the fee and payout-delay fields fill in from published rate cards. Every preset is editable.
• Import your own export: upload a payments, settlement, or orders report from Amazon, Shopify, Walmart, or TikTok Shop and the calculator fills in revenue, fees, refunds, and payout timing from your actual data. The file is read in your browser and never uploaded anywhere.
• Compare two scenarios: duplicate your inputs into Scenario B, change one thing, and see both results and both cash curves side by side.
• Share or save: copy a link that reopens the calculator with your exact numbers, or save the result as a PDF. Your inputs carry over to the other calculators on this site, and nothing is stored on our servers.

The formulas behind the numbers

Gross profit = revenue minus COGS, shipping, and marketplace fees. Operating profit = gross profit minus advertising and other operating costs. Net profit = operating profit minus income tax, applied only when operating profit is positive. Net margin = net profit divided by revenue.

The break-even line uses your variable cost ratio: fixed costs (ads plus overhead) divided by the share of each revenue dollar you keep after COGS, shipping, and fees. Revenue below that line loses money at the current cost structure.

What a healthy result looks like

Most ecommerce brands land between 5% and 20% net margin. Under 5% is fragile: one bad month of returns or a fee increase pushes the business into a loss. Above 15% usually means either strong pricing power or low customer acquisition cost. If your gross margin is fine but net margin is thin, the problem is almost always ad spend or overhead, not the product.

Profit and cash flow are not the same thing

A store can be profitable on paper and still run out of cash, because inventory is paid for months before it sells and marketplaces hold payouts for two weeks or more. That gap is where most sellers turn to outside capital. Onramp Funds advances capital against your actual sales across Amazon, Shopify, Walmart, BigCommerce, WooCommerce, Squarespace, Shopline, TikTok Shop, and Stripe, with a flat fee disclosed upfront and repayment as a percentage of sales. No personal credit check. See how much capital your combined revenue unlocks.

Sources

• Amazon selling fees and FBA rate card
• Shopify plans and payment processing rates
• Walmart Marketplace referral and WFS fees
• TikTok Shop US Seller Center (fees and payouts)
• Stripe pricing
• Onramp Funds: how it works, eligibility, and fee example

Frequently asked questions

What is a good profit margin for an ecommerce business?

A net margin of 10% is average, 20% is strong, and 5% or below needs attention. Gross margins typically sit between 40% and 60% for physical products.

Should I include my own salary?

Yes, under other operating costs. Leaving it out overstates profit and hides whether the business can afford to pay you.

Why does the tax line show zero?

Income tax is only applied when operating profit is positive. If you are running at a loss, there is no taxable income to estimate.

Does this calculator store my data?

No. All calculations run in your browser and nothing is saved or sent anywhere.