Resale Profit Calculator

Work out resale profit instantly with clear inputs, formula shown and shareable results.

About Resale Profit Calculator

Net profit deducts percentage fees on the sale price, shipping and packaging, and the original purchase cost from the selling price. Fees are charged on the gross sale including postage on most platforms, which is why a healthy looking mark-up can end up as a thin margin.

Formulas

Net profit

profit = selling price x (1 - fee rate) - shipping - purchase price

Return on cost

ROI % = profit / purchase price x 100

Worked example

With the default values below, Resale Profit Calculator returns Net profit of $56.80. Change any input above and every figure here is recalculated in your browser.

Inputs used

What you paidminimum 0.01: 120
Selling priceminimum 0.01: 210
Platform and payment feesaccepts 0–60 %: 12 %
Shipping and packaging costminimum 0: 8

Results

Net profit: $56.80
Margin on the selling price: 27.05%
Return on what you paid: 47.33%
Platform and payment fees: $25.20

Step by step

1Values used
2Net profit
3Return on cost
4Net profit= 56.80
5Margin on the selling price= 27.05
6Return on what you paid= 47.33
7Platform and payment fees= 25.20

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Resale Profit figure worked out?

profit = selling price x (1 - fee rate) - shipping - purchase price. Net profit deducts percentage fees on the sale price, shipping and packaging, and the original purchase cost from the selling price.

Why does this matter?

Fees are charged on the gross sale including postage on most platforms, which is why a healthy looking mark-up can end up as a thin margin.

What do I need to enter?

Enter what you paid, selling price, platform and payment fees, shipping and packaging cost. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.