# Shopify Margin Leakage Calculator
Estimate where Shopify and marketplace margin leaks each month. Indicative Red / Amber / Green band in under two minutes. Runs in your browser.
Rodan · Margin diagnostic

# Where is your Shopify margin leaking?

     Score the indicative monthly gap between reported product margin and true contribution. Ads, payment fees, shipping subsidies, returns, missing COGS and marketplace fees, in one pass.

      [Calculate leakage](#calculator)
      [Ecommerce governance overlay](/for/ecommerce)

     Indicative only. Figures stay in your browser. We never send financial inputs to analytics. About 90 seconds.

     Calculator

## Your monthly inputs

     Use recent averages. Leave marketplace fields at zero if you sell Shopify-only.

         Monthly net revenue (£)
           1 to 50,000,000

         Gross margin %
           0 to 90

         Monthly ad spend (£)
           0 upward

         Payment fee %
           0 to 5 · default 2.2

         Shipping cost overage (£/month)
           Subsidies and under-recovery

         Returns rate %
           0 to 50

         Missing COGS share of SKUs %
           0 to 100

         Marketplace fee % of marketplace revenue
           0 to 30 · optional

         Marketplace revenue share % of total
           0 to 100 · optional

         Show indicative band **
         Reset
HTML: https://rodan.io/tools/margin-leakage