What should your
ad budget be?
Turn a revenue target into an acquisition plan, with visible arithmetic and room for uncertainty.
No signup. Live results. Your inputs stay in this page.
Your monthly plan
Start with the illustrative inputs below, then replace them with your own numbers.
This plan assumes paid acquisition supplies all target orders. For lead generation and services, use revenue per won customer and session-to-customer conversion, not session-to-lead conversion. For SaaS, keep revenue and customer value on the same time basis.
Your budget estimate
Orders needed / month
Sessions needed / month
Gross profit per order
Maximum sustainable CAC
Target CAC
Monthly ad budget band
The maximum CAC is a break-even ceiling: spending this amount uses all gross profit and earns nothing before fixed costs.
Suggested channel split
Planning heuristic, NOT a measured benchmark. This is a starting allocation to replace with your own measured numbers. Amounts use the midpoint budget.
Treat these as separate budget buckets: exclude retargeting spend from the other channels where it has its own allocation.
How to read your results
Start with unit economics
Gross profit sets the ceiling on acquisition cost. This model uses gross margin and excludes fixed costs, shipping and returns unless you included them in your margin.
Keep a share of gross profit
Keeping 30% of gross profit leaves 70% available for advertising. This is not a 30% net margin on revenue. The budget band is a planning range, not a forecast or confidence interval.
Validate before scaling
Sessions are based on your conversion assumption. The tool does not predict traffic prices or whether the target is achievable. At 100% profit retained, the model allows no ad spend.
Put your plan into practice
Talk through your tracking, acquisition costs and next campaign with Prosperus Digital.