Ask most sellers how they set their PPC budgets and the honest answer is “I picked a number when I launched the campaign.” Then it never changes. Thirty days later, the budget still reflects what you guessed, not what’s working.

From a real account: where 30 days of budget actually went

Here’s one of our own accounts: $2,089 of ad spend over 30 days, grouped by product.

• Product A: 32% of the spend, 19% of the sales, 73% ACoS.

• Product B: 25% of the spend, 12% of the sales, 98% ACoS.

• Product C: 20% of the spend, 44% of the sales, 20% ACoS.

• Product D: 19% of the spend, 22% of the sales, 38% ACoS.

Products A and B took 57% of the budget and brought in 31% of the sales. Product C, the best performer at a 20% ACoS, got 20% of the budget, and its main campaign spent its full daily budget on average. While it was being held back, the account kept paying 73–98% ACoS on the others.

Nobody decided that on purpose. The budgets were set at launch and never revisited.

The 3 checks

1. Share of spend vs. share of sales. Put every product (or campaign) side by side. If something takes a bigger slice of the spend than of the sales, it needs a reason to be there, such as a launch you’re deliberately funding. If there’s no reason, it’s leaking.

2. Who’s hitting their budget cap? A campaign that runs out of budget and has a good ACoS is the cheapest growth you’ll ever find: it’s already proven, just held back. Raise that budget first. A campaign that hits its cap with a bad ACoS is spending fast on the wrong things, so fix its bids and targeting before it gets more money.

3. Budget follows proof, not hope. New launches deserve a budget, but a set one, with an end date and a loss you’ve agreed to in advance. “Let’s give it another month” is how a launch quietly becomes a quarter of your spend.

How to move budget without breaking things

• Move it in steps, about 20–25% at a time, and give each change a week. Sales attribution takes up to 7 days, so judging a budget change after 2 days misleads you.

• Raise winners before you cut losers. Cutting first shrinks total sales while you wait to see if the raise works. Raising first keeps sales moving.

• Watch total sales, not just ACoS. Moving budget to a winner should lift total sales. If ACoS improves but sales drop, you cut too much.

How to do this in Pulse Pilot

• Budget Pacing spreads a weekly or monthly budget across days and adjusts daily budgets as it goes, so a product stops running dry at noon.

• Tag budgets: tag your products’ campaigns, set one budget for the tag, and let Pulse Pilot split it by ROAS, conversion rate or ACoS. The products earning it get more automatically.

• Budget rules: raise or lower a campaign’s budget by % or $ when it meets your conditions. For example: raise 20% when ACoS is under your target and the campaign spent its full budget.