Marketing & Advertising
Search Advertising Forecast Calculator
Project monthly spend and CPC separately, then translate the closing month into clicks, conversions, revenue, gross profit, and contribution.
Ad spend through forecast horizon-
Opening-month expected clicks-
Opening-month expected conversions-
Opening-month attributed revenue-
Final-month planned spend-
Final-month average CPC-
Final-month expected clicks-
Final-month expected conversions-
Final-month gross profit before ad spend-
Final-month gross profit after ad spend-
Decision view
Search advertising closing-month funnel
Search advertising closing-month funnelSpend and CPC change independently before clicks, conversions, gross profit, and contribution are calculated.
Exact scenario comparisonMonthly CPC change (%) changes while all other entered assumptions remain constant.
| Monthly CPC change (%) | Ad spend through forecast horizon | Opening-month expected clicks | Opening-month expected conversions | Opening-month attributed revenue | Final-month planned spend | Final-month average CPC | Final-month expected clicks | Final-month expected conversions | Final-month gross profit before ad spend | Final-month gross profit after ad spend |
|---|
Period-by-period detail
Monthly search advertising forecast
How to use Search Advertising Forecast Calculator
- Start with a defensible monthly spend and CPC.
- Forecast spend and CPC changes independently.
- Check closing contribution, not attributed revenue alone.
Calculator guide
Understanding Search Advertising Forecast Calculator
Search-ad forecasts should allow spend and auction price to move independently because more budget does not guarantee proportionally more clicks.
Calculation method
How the calculation works
Forecast spend and CPC independently, then translate each into opening and closing click, conversion, revenue, gross-profit, and contribution references. Compound spend and CPC at their entered monthly rates, divide final spend by final CPC, apply conversion rate and revenue per conversion, then subtract spend from gross profit.
Campaign forecast
Audit the closing month
The final contribution is produced by a chain of operational assumptions.
Worked situations
Practical examples
- If CPC rises faster than spend, final clicks can decline.
- Conversion rate is held constant in this model.
- Gross margin is applied before advertising spend is deducted.
Better inputs
Useful tips
- Use auction insights and recent CPC trends.
- Test lower conversion rates at higher scale.
- Separate brand and non-brand campaigns.
Before relying on the result
Limitations and common mistakes
- Incrementality, attribution lag, seasonality, auction saturation, query mix, quality, refunds, inventory, and channel overlap are excluded.
- Conversion rate, value, and margin remain constant.
- Attributed results are not causal proof.
Reference
Key terms
- CPC
- Average advertising cost per click.
- Attributed revenue
- Revenue assigned to modeled conversions.
- Gross profit
- Attributed revenue multiplied by entered gross margin.
- Contribution
- Gross profit remaining after advertising spend.
Important note
Calculated from the entered campaign values. Validate attribution, incrementality, lag, margin, and observed source data before making decisions.
Frequently asked questions
Why forecast CPC separately from spend?
Auction prices can change even when the budget plan does not.
Does this include customer lifetime value?
No.
Is closing contribution annual?
No, it is the final modeled month.
Does the page prove incrementality?
No.