How do FBA fees affect break-even ROAS?

FBA fees directly reduce your net margin, which raises your break-even ROAS. Higher fees mean you need a higher ROAS to be profitable — this is why profitability analysis per SKU is critical.

Profitability

Amazon Break-Even ROAS Calculator

Break-even ROAS is the minimum return your PPC needs before ad spend starts eating into profit. Enter selling price, cost of goods, FBA fees, and other costs to find your floor before you set a single bid.

Profitability

⚖️ Break-Even ROAS Calculator

Inputs

Type a value or drag the slider

Selling Price

$5$5,000

Cost of Goods

$1$4,000

FBA Fees

$0$500

Other Costs

$0$100

Results

⚖️

Enter values & calculate

Adjust the sliders and click Calculate to see your results.

Formula

BE-ROAS = 1 ÷ Net Margin %

Break-even ROAS is the minimum return needed before ad spend starts losing money. Below this ROAS you are running unprofitable campaigns.

Example

Net Margin 30% → BE-ROAS = 1 ÷ 0.30 = 3.33×

FAQs

Without knowing your floor, you may run campaigns at a ROAS that looks healthy but actually destroys margin. Break-even ROAS is the minimum acceptable target — your actual target should be higher.

Related calculators

📈 ROAS

Is your PPC spend generating real profit?

🎯 TACOS

Your real PPC efficiency including organic sales

💰 Profit Margin

Real profit per unit after all Amazon costs

The concept

The floor, not the target

Break-even ROAS is not what you should aim for — it's the line below which every ad dollar spent is destroying margin. Most sellers should target a ROAS at least 1.5–2× above their break-even point to build in a profit buffer and room to absorb rising ad costs.

Why this has to be calculated per SKU

Break-even ROAS is driven entirely by net margin, and margin varies SKU by SKU based on price, COGS, and FBA fee tier. A single account-wide ROAS target can leave your thinnest-margin products running at a loss while your highest-margin products are under-invested.

Common mistakes

What sellers get wrong

✕Setting one ROAS target across an entire catalog instead of calculating break-even individually for each SKU's actual margin.
✕Forgetting to include 'other costs' — inserts, packaging, prep fees, storage — which quietly raise the true break-even point.
✕Treating break-even ROAS as a safe target to run at, rather than the absolute minimum before ads become unprofitable.

Want this run against your real numbers?

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