Amazon FBA Break-Even Formula: Your Floor Price in 2026

The Amazon FBA break-even formula tells you the lowest price you can charge without losing money on a sale. Learn it once, use it on every product — with a worked example.

Most Amazon sellers price backwards: they pick a price that “looks competitive,” then discover the fees eat the margin. The amazon fba break even formula flips that around — it gives you your floor price first, the number below which every sale loses money. Every pricing decision, every PPC bid, and every discount starts here.

Why Break-Even Comes Before Pricing Strategy

Your break-even price is the foundation of your entire pricing strategy. Price above it and you have room for advertising, coupons, and promotions. Price below it — even “temporarily” to win the Buy Box — and you are paying Amazon for the privilege of selling your own product. The sellers posting “I’m selling but losing money” in seller forums are, almost without exception, sellers who never calculated their floor.

The Formula

Break-even price = (Landed unit cost + FBA fulfillment fee + Other per-unit variable costs) ÷ (1 − Referral fee rate)

In plain English: add up everything each unit costs you, then gross it up to cover the percentage Amazon takes off the top. The division by (1 − referral rate) is the step most sellers miss — they subtract fees from the price instead, which understates the floor and quietly erases margin.

What Goes Into Each Variable

• Landed unit cost: what one unit costs you, delivered and ready to sell — product cost from the supplier plus inbound freight to Amazon, divided by units. Include packaging and any prep costs.
• FBA fulfillment fee: Amazon’s per-unit pick, pack, and ship charge, which depends on your product’s size tier and weight. Look it up for your exact product in Seller Central’s revenue calculator — fees change, so don’t rely on a number memorized from any blog post, including this one.
• Other per-unit variable costs: anything else that scales with each sale — a per-unit returns allowance, a per-unit ad spend budget, or coupon cost. Keep fixed costs like the monthly Professional plan fee out of this formula; they don’t change the per-unit floor.
• Referral fee rate: the percentage Amazon takes of the selling price, which varies by product category. Confirm your category’s current rate in Seller Central before you calculate.

Worked Example (Illustrative Numbers)

Let’s walk through a hypothetical product. These numbers are an example to demonstrate the math — always plug in your own real figures:

• Landed unit cost: $9.50 ($8.00 product + $1.50 inbound freight per unit)
• FBA fulfillment fee: $4.50 (example — look up your product’s actual fee)
• Other per-unit variable costs: $1.00 (returns and miscellaneous allowance)
• Referral fee rate: 15% (example — confirm your category’s rate)

Total per-unit cost = $9.50 + $4.50 + $1.00 = $15.00
Break-even price = $15.00 ÷ (1 − 0.15) = $15.00 ÷ 0.85 = $17.65

Check the math: at $17.65, Amazon’s 15% referral fee takes about $2.65, leaving $15.00 — exactly your per-unit cost. Every cent above $17.65 contributes toward fixed costs and profit; every cent below is a loss. Try it with your own numbers in our free break-even calculator.

What Break-Even Doesn’t Cover

Break-even is your floor, not your target. It doesn’t include fixed monthly costs (Professional plan, software subscriptions), the value of your time, or the advertising spend needed to rank a new listing. And it’s a snapshot — if your supplier raises prices or Amazon adjusts its fees, the floor moves. Smart sellers revisit this formula quarterly and before every reorder.

From Floor Price to Real Pricing

Once you know the floor, real pricing is about positioning. Check what comparable listings charge, estimate the PPC cost required to compete — our Amazon PPC guide covers the bid math — and set a price that leaves a healthy margin after advertising. Many sellers target at least 25–30% margin after all costs as a starting point, but that’s a guideline, not a law; your category and strategy decide. For the complete fee picture, including storage and inbound placement fees, run the product through our Amazon FBA profit calculator. And if Amazon’s fee structure still feels opaque, our Amazon FBA fees guide breaks down every charge line by line.

Know your floor before you list. It takes five minutes and it changes every pricing decision you make afterward. Run your numbers in the free break-even calculator — and if you’d like a second pair of eyes on the math, book a free consultation.