Home / Tools / Break-even calculator

Break-Even Calculator

The Cost Calculator answers what your stack costs. This one answers whether the unit can carry it — what is left of an order after product, fulfilment and fees, and whether that covers what you pay to get the order. Calculations run in your browser; nothing you type is sent to our server.

Net per order, after acquisition —

break-even ROAS = revenue— ÷ contribution— = ROAS—

/ channel

/ load an example

/ the unit

Selling priceWhat the customer pays for the item Landed costProduct, inbound freight and duty, per unit Refund rate %Returns, chargebacks and goodwill refunds Cost recovered on refund %0 if the unit never comes back sellable

/ fulfilment and payments

Shipping chargedPer order; 0 if shipping is free Shipping paidWhat delivery actually costs you Processing %Shopify Payments or Stripe, typically 2.9 Processing fixedPer transaction, typically 0.30

/ buying the customer

Cost per orderWhat one order costs you in ad spend Orders per customer1 means you buy the customer again every time

/ overheads

Fixed cost per monthPlatform, apps and software — size it with the Cost Calculator

/ per order, worked through

Averaged over every order placed, including the ones refunded.

/ the ratios that decide it

/ where it flips

/ method and limits

Every figure is per gross order placed, so refunds reduce revenue and still carry their own costs. Contribution margin is what remains after all variable costs except advertising, which makes it the ceiling on what you can pay for a customer. Fulfilment and payment processing are charged on refunded orders; the Amazon referral fee is not. Storage is entered per unit sold rather than per unit held, so slow sell-through understates it. Figures are pre-tax and exclude your own time. This tool models your numbers — it contains no tracked data of ours, and the defaults are illustrative, not benchmarks.