Your 12-month P&L, built instantly.

A 12-month profit and loss for one product. You set the product cost, selling price, and ad spend as a share of sales. You also set monthly sales growth, reorder time, and minimum order quantity. The calculator returns monthly profit, cumulative profit, return on investment, and the month you break even.

Your first order is the investment: units ordered times product cost. Each month adds revenue minus product cost, Amazon fees, and ad spend to the running total. The break-even month is the first month that total turns positive.

Product cost per unit, Amazon fees as a share of revenue, and advertising as a share of sales. That last one is TACoS. Freight, duties, and one-off launch costs such as photography are not in the model. So the result is a floor for what the launch needs. For those, use the free Launch Cost Calculator and Tariff Calculator in the Seller Hub.

Reorder time is the number of days a new order takes to reach Amazon. The calculator groups the year into reorder cycles and sums the units you will sell in each. It orders that amount or your minimum order quantity, whichever is higher. You see the months cash leaves for stock, not only the months sales come in.

As accurate as your inputs. Start from supplier quotes and the prices of the top listings in your niche. Then move one slider at a time to see which input moves the result most. That is the number to confirm before you place an order.