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Marketplace profit calculator

See what an order actually leaves you after commission, shipping, VAT, product cost and your return rate. Add a second and third channel and the same product is compared side by side. No rates are baked in; the math runs on the numbers from your own contract.

Most sellers think about profit one channel at a time. Yet the same product at the same price can earn on one marketplace and fall below break even on another, purely because of commission, shipping and return differences. Per order the gap looks small. Multiplied by monthly volume it stops being small.

This tool takes the product inputs once (price, VAT, cost, other costs), then asks for your own commission, shipping rate and return rate per channel. It opens with one channel; add more to compare, up to three. The output is not a single number but a line by line breakdown and the gap between channels.

The math accounts for VAT offset, so the VAT on commission and shipping invoices is not treated as an expense. The result is net profit before tax; income or corporate tax depends on your legal setup and stays out of scope.

01

Calculator

Product

Shared inputs

Numbers that belong to the product. The same values are used for all three channels.

Product VAT rate

Channel

Channels

Enter your own commission rate and your own shipping rate in each column. Those rates are stored in this browser and will be waiting for you next time.

Enter a commission or shipping cost to include this column.

Add a second channel and the same product is calculated side by side. Three channels maximum.

Result

Comparison

Enter a sale price and at least one commission rate to see the comparison.

02

How it calculates

The formulas are open, there is no black box. The amount left from the sale is found by stripping VAT; costs are stripped of VAT and deducted from it. Each channel column runs the same formula with its own rate.

net of sale = sale price / (1 + VAT rate)

commission = sale price x commission rate

shipping, transaction fee, other cost = amount / 1.20

product cost = amount / (1 + VAT rate) when entered VAT inclusive

profit with no return = net of sale - commission - costs

return impact = return rate x (profit with no return + outbound shipping + return shipping + other cost)

expected profit = profit with no return - return impact

break even price = the sale price where expected profit hits zero

VAT on commission and shipping is not booked as a cost because it is deductible; booking it would understate profit. Product cost entered VAT inclusive is stripped using the product's own VAT rate. When you enter a return rate the break even price rises accordingly. The result is profit before tax.

03

Line notes

Why rates are not baked in

There is no such thing as a single marketplace rate. Rates vary by category, get revised over time, and seller specific agreements exist. Instead of shipping a table that will age, we ask you to enter the rate from your own panel once. It stays in your browser and is ready next time.

Shipping and volumetric weight

Volumetric weight is length x width x height / 3000, and carriers bill whichever is larger, volumetric or actual. The rate depends on your contract, so you enter the amount. If you have different shipping deals per channel, write them into each column separately.

Different price per channel

If you do not sell at the same price everywhere, fill the price field inside that column; leave it empty to use the shared price. Raising the price on a high commission channel is a common reflex, and the comparison shows whether it actually works.

Return rate

Return rate is entered per channel, because the same product behaves very differently from one channel to another. The math assumes revenue is reversed, commission is refunded and the item comes back sellable; what leaves your pocket is outbound shipping, return shipping and packaging. If items come back damaged or incomplete, your real loss is larger.

Penalties and payment terms

Deductions and penalties behave periodically rather than per order, so they are deliberately left out. Payment terms affect cash flow rather than profit. To see the periodic picture you need to track both separately.

Your own store in the comparison

The My own store option gives you a commission free baseline. It is not zero cost though: put your payment gateway fee in the percentage field, shipping and packaging in their own fields, and your ad share under other cost. Only then is the comparison honest.

Tax

The result is profit before tax. Income or corporate tax depends on your legal setup and stays out of scope for this tool.

04

Frequently asked

Why are there no preset commission rates?

Because they would not be accurate. Rates vary by category, get revised over time, and seller specific agreements exist. A fixed table would age, and you would price against a stale number. Entering the rate from your own panel once is both faster and always correct.

Where are the rates I enter stored?

Only in your own browser. Commission, shipping and fee fields are kept in your device's local storage; they never reach our server and we cannot see them. One click on Clear saved rates wipes them.

Why is VAT on commission not counted as a cost?

The marketplace adds VAT to the commission invoice, but that VAT is deductible, so it does not create a lasting cost. Booking it as an expense would understate your profit.

Which marketplaces does it work for?

All of them. The list holds Trendyol, Hepsiburada, N11, Amazon Türkiye, Çiçeksepeti, PttAVM and Pazarama, plus your own store. Since no rates are baked in, you can also use it for a channel that is not listed by typing your own rate into the column.

How does the return rate enter the math?

Out of a hundred orders, the return rate share comes back. On a returned order revenue is reversed and commission is refunded, and the item comes back sellable, but you have paid outbound shipping, return shipping and packaging. The tool deducts that from the no return profit and gives you the expected profit per order. Leave return shipping empty and it is treated as equal to outbound.

What does the break even price tell me?

The sale price where expected profit lands exactly on zero. With everything else fixed, selling below it is a loss. Entering a return rate raises the break even price, because the orders that sell have to carry the cost of the orders that come back. It is the first number to check before granting a campaign discount.

Why does the result differ from my panel?

Panel screens also include periodic items such as returns, penalties, campaign contributions and service fees; this tool shows the pure math of a single order. When the gap is large the cause is usually those periodic items rather than the formula.

When the gap hides in the line items

If the numbers show a serious gap between channels, the cause is rarely a single rate. It is usually pricing and channel mix that were never designed together. Let us look at where you lose margin across the product range.

Read: where marketplace margin disappears »