E-Commerce Break-Even ROAS, Target CPA & Contribution Margin per Order Calculator

Find exact Break-Even ROAS, Maximum Allowable CPA, and net profit per e-commerce order.

Break-Even ROAS Threshold
1.55 × ROAS
Maximum Break-Even CPA (USD) USD 48.53
Net Profit per Order at 2.8× ROAS USD 21.74
Actual Paid CPA (AOV / ROAS) USD 26.79
Inputs
⚡ Scenarios:
Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
$
Average Order Value (AOV) including customer shipping paid.
$
Supplier product cost + fulfillment shipping cost per order.
%
Payment processor percentage fee (e.g., 2.9% + $0.30).
× ROAS
Actual Return on Ad Spend (ROAS, e.g., 2.8× revenue per $1 ad spend).
Results & Graph
Break-Even ROAS Threshold
1.55 × ROAS
Maximum Break-Even CPA (USD)
USD 48.53
Net Profit per Order at 2.8× ROAS
USD 21.74
Actual Paid CPA (AOV / ROAS)
USD 26.79

Break-Even ROAS Threshold

Graph 1 • Break-Even ROAS & Target CPA • Domain Architecture & Live Telemetry Maps Average Order Value Aov, Product And Shipping Cost, Payment Processing Fee Pct through Break-Even ROAS & Target CPA Formula.
E-COMMERCE & UNIT ECONOMIC Break-Even ROAS Threshold 1.55 × ROAS Maximum Break-Even CPA (US USD 48.53 Break-Even ROAS & Target CPA • Component Waterfall Break-Even ROAS Threshold 1.55 × ROAS Maximum Break-Even CPA (USD) USD 48.53 Net Profit per Order at 2.8× R USD 21.74 Actual Paid CPA (AOV / ROAS) USD 26.79
Graph 2 • Break-Even ROAS Threshold Across Average Order Value Aov Sweep (40% → 160%) Evaluates PreAdMargin$ = AOV − COGS − Shipping − PaymentGatewayFee; BreakEvenROA across 7 operating points (current input highlighted).
0 × ROAS 3.42 × ROAS 6.83 × ROAS 6.21 30$ 2.32 45$ 1.77 60$ 1.55 75$ 1.43 90$ 1.35 105$ 1.30 120$
Graph 3 • Joint Sensitivity: Average Order Value Aov × Product And Shipping Cost Compares Break-Even ROAS Threshold when Product And Shipping Cost is shifted +25% (solid) vs. −25% (dashed).
0 × ROAS 1.40 × ROAS 2.79 × ROAS --- Product And Shipping Cost @ 75% 2.54 -30% 2.02 -15% 1.76 +0% 1.61 +15% 1.51 +30%
Summary: Pre-ad contribution margin is USD 48.53 (64.7%), setting Break-Even ROAS at 1.55× (Max CPA USD 48.53); at 2.8× ROAS, net profit is USD 21.74/order.
Summary: Pre-ad contribution margin is USD 48.53 (64.7%), setting Break-Even ROAS at 1.55× (Max CPA USD 48.53); at 2.8× ROAS, net profit is USD 21.74/order.
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Interactive chart & math engine powered by CalculatorGraph

Formula & Mathematical Methodology: Break-Even ROAS & Target CPA Formula

PreAdMargin$ = AOV − COGS − Shipping − PaymentGatewayFee
BreakEvenROAS = AOV / PreAdMargin$
NetProfit = PreAdMargin$ − (AOV / ActualROAS)
PreAdMargin$ = AOV − COGS − Shipping − PaymentGatewayFee; BreakEvenROAS = AOV / PreAdMargin$; NetProfit = PreAdMargin$ − (AOV / ActualROAS)
  • averageOrderValueAov: Average Order Value (AOV) including customer shipping paid.
  • productAndShippingCost: Supplier product cost + fulfillment shipping cost per order.
  • paymentProcessingFeePct: Payment processor percentage fee (e.g., 2.9% + $0.30).
  • actualCampaignRoas: Actual Return on Ad Spend (ROAS, e.g., 2.8× revenue per $1 ad spend).

Rounding: Internal floating-point calculations preserve full precision; currency and percentage outputs round to 2 decimal places.

Worked Example: Break-Even ROAS & Target CPA Worked Example

Find exact Break-Even ROAS, Maximum Allowable CPA, and net profit per e-commerce order.

  1. Enter your operational, financial, or physical measurement inputs.
  2. Apply the standard domain equation: PreAdMargin$ = AOV − COGS − Shipping − PaymentGatewayFee; BreakEvenROAS = AOV / PreAdMargin$; NetProfit = PreAdMargin$ − (AOV / ActualROAS).
  3. Review the primary result, sensitivity metrics, and 3 interactive SVG graphs.
Result: Calculates Break-Even ROAS & Target CPA via PreAdMargin$ = AOV − COGS − Shipping − PaymentGatewayFee; BreakEvenROAS = AOV / PreAdMargin$; NetProfit = PreAdMargin$ − (AOV / ActualROAS).

Frequently Asked Questions

How does the E-Commerce Break-Even ROAS, Target CPA & Contribution Margin per Order Calculator calculate results?

It computes PreAdMargin$ = AOV − COGS − Shipping − PaymentGatewayFee; BreakEvenROAS = AOV / PreAdMargin$; NetProfit = PreAdMargin$ − (AOV / ActualROAS) directly in your browser and updates three custom SVG visualizations in real time.

Can I use Goal Seek to solve backwards for any input variable?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any input parameter.

Are my business and personal numbers kept private?

Yes. All calculations execute 100% locally in your browser with zero server transmission.

Business & Marketing · E-Commerce & Unit Economics

E-Commerce Break-Even ROAS, Target CPA & Contribution Margin per Order Calculator: inputs, method, and how to read the result

Find exact Break-Even ROAS, Maximum Allowable CPA, and net profit per e-commerce order.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Display Currency: Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
  • Average Order Value Aov: Average Order Value (AOV) including customer shipping paid.
  • Product And Shipping Cost: Supplier product cost + fulfillment shipping cost per order.
  • Payment Processing Fee Pct: Payment processor percentage fee (e.g., 2.9% + $0.30).

What the calculation includes

With the default values shown, Break-Even ROAS Threshold is 1.55 × ROAS. The calculation follows Break-Even ROAS & Target CPA Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Average Order Value Aov from 75 $ to 83 $ changes Break-Even ROAS Threshold from 1.55 × ROAS to 1.47 × ROAS. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses industry-standard APICS/ASCM supply chain, lean manufacturing, and consumer physics formulas.
  • Actual commercial freight tariffs, marketplace commissions, and utility rates vary by carrier and contract.

Scope: Global Supply Chain, Business & Consumer Standard Check the assumptions and limitations against your situation before relying on the estimate.

More in Business & Marketing: ROI Calculator (Return on Investment), Percentage Calculator.