Sales & marketing · Calculator companion · By K Imports
Advertising ROAS and contribution: practical guide
This guide explains how to use the Count.ie advertising roas and contribution. Check whether advertising revenue covers product, fulfilment and campaign costs. Follow the inputs, method and worked example below, then compare your own scenario.
Guide written .
Open the Advertising ROAS and contribution calculatorWhat to prepare
- Define the event, conversion, customer and attribution period before collecting data.
- Use spend and outcomes from the same reporting window.
- Distinguish revenue, contribution profit, recurring revenue and customer lifetime assumptions.
Understand the inputs
The calculation method
ROAS = revenue ÷ ad spend. Contribution deducts product, fulfilment, payment, advertising and other campaign costs.
Worked example
Illustrative inputs and their result.
Example inputs
- Advertising spend (€)
- 5000
- Attributed revenue (€)
- 20000
- Product cost (€)
- 8000
- Fulfilment cost (€)
- 2000
- Payment fees (€)
- 400
- Other campaign costs (€)
- 500
Calculated example result
- Roas
- 4×
- Campaign Contribution
- €4,100.00
- Break Even Roas
- 2.0833×
How to interpret the result
A marketing metric depends on its attribution and cost definitions. A favourable ratio is not proof that advertising caused every sale or that future customers will behave the same way.
Compare campaigns with the same attribution window and outcome definition. Test a lower conversion rate or shorter retention period before extrapolating a promising result.
Common mistakes to avoid
- Do not double-count a customer or conversion reported by multiple channels.
- Revenue is not the same as profit available to fund acquisition.
- Small samples and changing cohorts can produce unstable comparisons.
Assumptions and sources
Break-even ROAS is based on variable contribution margin and excludes fixed campaign costs. Attribution can overstate incremental revenue.
If your case falls outside this scope, use a more suitable calculator or contact us about an unclear method.