Ad Spend Profit Calculator

Model your advertising profitability and find the optimal spend level for maximum profit.

Your Numbers

Profitability

Monthly Revenue

Monthly Profit

Profit Margin

Annual Profit

FAQ

How much should I spend on ads?

Most growing businesses allocate 5-15% of revenue to advertising. The optimal amount depends on your industry, margins, and growth stage.

What is a good profit margin on ad spend?

After accounting for COGS and ad spend, a healthy profit margin is 20-40%. If your margin is below 10%, your ads may not be sustainable at current efficiency.

When should I increase ad spend?

Increase ad spend when your ROAS is stable above 3x, your fulfillment can handle growth, and incrementality tests show ads are driving new revenue.

Want to find what's broken?

Get a free growth audit. No pitch, no commitment — just clarity on what to fix next.

Get Your Growth Audit
🤖Need help? Ask Cosmo!