Q3
"Spend 10% of revenue on marketing" is the most repeated, least useful budgeting advice in paid ads. It ignores margin, sales cycle, and what "good" even looks like for your specific offer. A real ads budget starts from your numbers, not a rule of thumb.
Start from your break-even CPA, not your total budget
Before setting a monthly number, work out what you can actually afford to pay for a customer:
Break-even CPA = Average order value × Gross margin %
If your budget is set before this number exists, you're guessing. If it's set after, every dollar spent has a target to beat.
Budget in phases, not one big number
- Phase 1 (learning): enough spend to hit statistical significance on 2-3 ad sets within 2-3 weeks, not a single "let's see" campaign.
- Phase 2 (scaling): once a campaign is beating break-even CPA consistently, scale spend in 20-30% increments, not by doubling overnight.
- Phase 3 (maintaining): hold spend at the level where CPA and lead quality both stay stable; growth beyond that usually needs a new audience or offer, not more budget on the same one.
Platform choice changes the math
Google Search intent-based clicks are typically more expensive per click but convert at a higher rate; Meta's cheaper clicks often need a stronger middle-of-funnel nurture before they convert. Comparing raw CPC across platforms without accounting for this is how budgets get misallocated.
What this looks like in practice
Through our Google & Meta Ads Management service, every new account starts with the break-even CPA calculation before a single ad goes live, so the budget conversation is about hitting a number, not guessing at a percentage of revenue.
The actual answer
There's no fixed number that's right for every business. The right budget is whatever it costs to reach statistical significance on your break-even CPA, then scale from a proven number, not a spreadsheet percentage.