Amazon ROI Calculator

Return per cycle, and how many cycles you get.

Return per cycle, and how many cycles you get. Return on cost matters less than how often you get it.

Written and maintained by Mohit PatelLast checked August 4, 2026How we build these

Selling price

Unit cost landed

Amazon fees per unit

Advertising per unit

Cash cycle from payment to payout

weeks

Amazon revises fee schedules at least annually and adds new surcharges more often. These defaults are a starting point, the figures in your own fee preview are the ones that describe your ASINs.

Return on cost

147.8%

480% annualised at 3.3 turns

Profit per unit$10.64

Cost per unit$7.20

ROI per cycle147.8%

Annualised ROI480%

ROI per cycle matters less than how many cycles you get. A 148% return turning 3.3 times a year beats a 296% return turning once: which is why fast-moving products with thin margins often outperform slow ones with fat margins on the same capital.

How the Amazon ROI Calculator works

Return on cost matters less than how often you get it. A 30% return turning four times a year beats a 60% return turning once, on the same capital, which is why fast-moving thin-margin products often outperform the fat-margin ones sellers prefer to talk about.

Also known as: FBA return on investment · Amazon ROI per turn · return on inventory investment Amazon

Setting it out

Return on investment on an Amazon product is profit per unit ÷ landed cost per unit, expressed as a percentage. It answers what each dollar tied up in stock returns per turn, which is the question a self-funded seller actually faces.

Annualised, it is ROI per turn × turns per year, and that is the figure that makes products with different price points and different cash cycles comparable.

Margin and ROI answer different questions and routinely disagree about which product is better.

A concrete case

The $29.99 product with $8.50 of landed cost and $8.55 of profit after everything: ROI is 100.6% per turn. At four turns a year the annualised return on that capital is over 400%.

Now a $120 product with $52 of cost and $21 of profit: a 17.5% margin and a 40.4% ROI per turn. At two turns a year, roughly 81% annualised.

The second product looks better on absolute profit per unit, $21 against $8.55, and returns a fifth as much per dollar of capital per year.

For a seller with $60,000 to deploy, the first product generates roughly $60,000 of annual profit from that capital and the second generates $12,000. That is the comparison margin cannot make.

What the number hides

ROI per turn ignores how long the turn takes, which is where most of the difference between products actually lives. A 100% ROI over four months and a 100% ROI over twelve are completely different investments.

It also ignores the effort per dollar. A catalogue of cheap fast-turning products requires far more purchasing, receiving and management attention than one of expensive slow-turning ones, and that time has a cost that does not appear in the ratio.

Where to go from here

Always annualise. ROI per turn is the number sellers quote and the number that misleads; ROI per year is the one that supports a decision between products.

Then check it against the actual cash cycle rather than the theoretical turn rate. Payment terms, production lead time, shipping time and settlement lag all extend the cycle, and the annualised figure is only as good as the turn count behind it.

The rule of thumb, and why it exists

The conventional Amazon guidance is to look for products above roughly 100% ROI per turn, which sounds extraordinary against most businesses and is not once the cash cycle is understood.

A product bought in China with a 60-day lead time, 30 days of shipping, 30 days of stock cover and a 14-day settlement lag has a cash cycle approaching five months. That is roughly 2.4 turns a year, so a 100% ROI per turn is around 240% annualised, before the reinvestment compounding that a growing seller actually experiences.

The reason the threshold sits so high is that the capital is at risk for a long time, the fee structure moves annually, and competitors can appear on the listing at any point. A thin ROI leaves nothing to absorb any of that, which is why experienced sellers treat the threshold as a risk rule rather than a greed one.

Where to go next

The Amazon ROI question rarely arrives on its own. These are the ones that usually come with it:

Amazon SKU Profitability Calculator — Rank the catalogue by return on capital.
Amazon FBA Capital Requirement Calculator — Stock in the pipeline plus money awaiting payout.
Amazon Profit Margin Calculator — Gross against net, and where the gap goes.
Etsy Fee Calculator — Every Etsy fee on one sale, itemised.

Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price, check the platform's current fee schedule before you price a product against it. This is not tax or business advice.

Frequently asked questions

What ROI should I target on Amazon?

Sellers commonly look for 100% ROI on cost for arbitrage and 50% or more for private label. But the figure is meaningless without the cycle time, annualise it before comparing products.

What is the cash cycle on Amazon?

Payment to supplier, production, freight, receiving, sell-through, then Amazon's payout schedule. Twelve to twenty weeks is common for imported goods, which means capital turns three or four times a year at best.

Why does turn rate matter so much?

Because the constraint on most Amazon businesses is capital, not demand. Doubling turn rate doubles annual profit on the same money, which is a bigger lever than any margin improvement you are likely to find.

ROI or margin, which should I optimise?

Annualised return on capital, which combines both. It is the only figure that correctly ranks a slow high-margin product against a fast low-margin one.