How much should you spend on ads? Wrong question.

Until you know what a customer is worth to you, you're not budgeting ads. You're guessing with a credit card.

Most brands pick an ad budget the way they pick a lottery number. "Let's try $2,000 this month and see." Then they judge the result by whether it "felt" like it worked. There's a better way, and it starts by flipping the question.

Start with what you can afford to pay

The real number you need is your breakeven ROAS, the point where the revenue from an ad exactly covers what it cost to make the sale. You get there from your margins: if you keep 50 cents of gross profit on every dollar of revenue, you break even at a 2x return. Below that you're losing money on each order; above it you're making it.

From there you set a target ROAS comfortably above breakeven (that gap is your profit), and you translate it into a maximum cost per acquisition, the most you can pay to get a customer and still hit your number. Now you have something to steer by. An ad isn't "good" because it looks nice. It's good because it beats your max CPA.

Then model best, average, and worst case

Before you spend, sketch three scenarios. Best case, average case, and worst case, where worst case is breakeven, not catastrophe. That does two things. It tells you whether the math can even work at your margins, and it kills the panic that makes people yank spend at the first bad week. If your worst case is "we break even," you can afford to let a test run long enough to actually learn something.

How to actually budget it

Once the economics check out, the spend answer is simpler than people think. Start with enough budget to gather real data (too little and the platform never learns, so you get noise instead of signal), keep it profitable against your max CPA, and scale into winners as they prove out. You don't decide the monthly number up front and pray. You let the account earn its next dollar by showing it can spend the last one profitably.

Sometimes the honest answer is "not yet"

If your margins can't support the cost of acquiring a customer through ads, no budget fixes that. Sometimes paid media doesn't make sense until the back end, your email, retention, and repeat-purchase systems, makes each customer worth more than their first order. I'd rather tell you that than sell you a media-buying retainer that can't win. Fixing the economics first is often what makes the ads work later.

Budget is one piece of a bigger system. See how it fits with tracking, creative, and testing in the complete paid media playbook, or have me run the numbers and the ads as part of the media buying service.