Skip to content
SLC

Amazon FBA ROI Calculator

ROI (Return on Investment) measures how efficiently the money you put into a product turns into profit. Amazon sellers lean on ROI during product research because it lets you compare opportunities apples-to-apples — a $5 profit on a $10 investment (50% ROI) is usually a better buy than a $5 profit on a $25 investment (20% ROI), even though the dollar profit is the same. Tip: most experienced FBA sellers won't source a product below 50% ROI once Amazon's fees are factored in.

Last Updated: June 2026

Reviewed for current Amazon FBA referral and fulfillment fees.

What it costs to get one unit to Amazon (inbound shipping).

Usually 15% of the selling price (varies by category).

Per-unit pick, pack, and ship fee based on size & weight.

Advanced (optional)

Returns reserve, software, advertising per unit, etc.

Net profit per sale

$11.01

ROI

115.89%

Excellent Opportunity

Profit margin

36.71%

High Profit Potential

Total cost per unit

$18.98

Investment $9.50 + fees $9.48

Real Profit Snapshot

After platform fees

Estimated monthly profit

$550.50

Verdict: Healthy margin — this product has strong room to scale with ads or volume.

Excellent OpportunityThis product generates approximately $11.01 profit per sale with an estimated ROI of 115.89%.

Recommendation

Excellent candidate — strong margin of safety for returns, ads, and fee changes.

Amazon FBA ROI benchmarks

How most Amazon sellers judge a product opportunity.

ROIRating
Under 20%Weak
20–50%Acceptable
50–100%Strong
100%+Excellent

All calculations are estimates based on average platform fees. Real profits may vary depending on category, ads, and shipping.

Free worksheet for your next step

Use this worksheet to plan FBA fees, ads, and product profitability.

  • WorksheetAmazon FBA

    Amazon FBA Profit Worksheet

    A worksheet for estimating product profit after inventory and FBA costs.

    Open the worksheet →
  • PlannerAmazon FBA

    Amazon FBA Income Goal Planner

    Turn your monthly Amazon income goal into a realistic plan using profit per unit, units per day, and product mix.

    Open the planner →

How to use this calculator

  1. Enter your numbers in each field above — the calculator updates instantly as you type, so there's nothing to submit.
  2. Use your real figures when you have them, or sensible estimates while you're planning. If a field doesn't apply, leave it at zero.
  3. Compare the results, then change one input at a time to see how each lever (price, cost, fees, volume) moves the outcome.

Formula

Total investment = Product cost + Shipping + Prep + Other costs · Total Amazon fees = Referral fee + FBA fee · Net profit = Selling price − Total investment − Total Amazon fees · ROI (%) = (Net profit ÷ Total investment) × 100 · Profit margin (%) = (Net profit ÷ Selling price) × 100

Worked example

You buy a unit for $8, pay $1 inbound shipping and $0.50 prep. Amazon's referral fee is $4.50 and the FBA fee is $4.98. You sell it for $29.99.

  1. Total investment = 8 + 1 + 0.50 = $9.50
  2. Total Amazon fees = 4.50 + 4.98 = $9.48
  3. Net profit = 29.99 − 9.50 − 9.48 = $11.01
  4. ROI = (11.01 ÷ 9.50) × 100 ≈ 115.9%
  5. Profit margin = (11.01 ÷ 29.99) × 100 ≈ 36.7%

Answer: $11.01 profit · 115.9% ROI · 36.7% margin

How it works

ROI and profit margin answer different questions. Margin tells you how much of each sale you keep — useful for understanding pricing strength. ROI tells you how hard the cash you tied up in inventory is working — useful for sourcing decisions, because the same dollars can be spent on different products.

A quick rule of thumb many FBA sellers use: below 20% ROI is risky once you account for returns, ads, and storage; 20–50% is workable; above 50% is a strong sourcing opportunity.

How to interpret your results

  • Dollar values are shown per sale, per order, or per item unless a result is explicitly labelled monthly, weekly, or daily.
  • Percentages (margin, ROI, conversion rate) are easier to compare across products and price points than raw dollars — use them when you benchmark.
  • A positive result means you're ahead after the costs and fees you entered. A negative result means the current numbers don't work — change a lever (raise price, cut a cost, lower ad spend) and recalculate.
  • Treat the output as a planning estimate, not a guarantee. Fees, taxes, and conversion rates shift over time — re-run the numbers whenever a key input changes.

Common mistakes

  • Forgetting prep and inbound shipping in the investment number, which inflates ROI.
  • Treating ROI and margin as the same metric — they answer different questions.
  • Ignoring PPC advertising spend, which most new products need to start ranking.
  • Skipping a returns reserve — even healthy products see a few percent come back.

Related Guides

Go deeper with plain-English guides on the same topic.

FAQ

What is a good ROI for Amazon FBA?
Many experienced FBA sellers target 50% ROI or higher on new sourcing, with 100%+ ROI considered strong. Anything below 20% is usually too thin once you factor in returns, ads, and long-term storage fees.
What is the difference between ROI and profit margin?
Margin is profit as a percentage of the selling price — it measures pricing efficiency. ROI is profit as a percentage of what you invested to acquire and prep the unit — it measures how hard your money is working. ROI is usually the key metric for product research; margin is more useful for pricing decisions.
How do Amazon sellers evaluate products?
Most sellers look at ROI, profit margin, monthly sales velocity, and competition before sourcing. They also check Amazon's referral category, FBA size tier, and any seasonal storage fees. The goal is a product with healthy ROI that can sustain ads, returns, and price competition.
Does this calculator include PPC or advertising?
Not by default. Add your estimated per-unit ad spend in the Other Costs field to see your post-ads ROI — many sellers spend $1–$3 per unit on PPC, especially during a launch.
Why is my ROI so different from my margin?
Because they have different denominators. A $10 profit on a $50 sale is 20% margin, but if it only cost you $15 to acquire and prep that unit, it's 67% ROI. Low-cost, mid-priced products often look modest on margin but excellent on ROI.

Why trust this calculator?

This tool uses standard mathematical formulas and commonly accepted calculation methods, shown openly in the Formula section above so you can verify the math yourself. Results are estimates based on the information you enter and do not account for every individual circumstance. For important financial, tax, legal, medical, or business decisions, please double-check with a qualified professional before acting on the numbers.

Keep going

One calculator rarely tells the full story. Pair this one with a related tool below to pressure-test your numbers from a different angle, or browse Work & Money Calculators for more in the same category.

What to calculate next

You may also find these tools helpful.

Related Guides

Related Calculators

Compare Alternatives

Case Studies

Recommended Downloads

Continue Learning