Lowering ACoS on bol: 5 mistakes eating your margin

Lowering ACoS on bol: 5 mistakes eating your margin Advertising on bol can seriously accelerate your sales — but without a grip on your ACoS (Advertising Cost of Sales), your profit vanishes into ad costs just as quickly. Many sellers fixate on revenue while their margin quietly slips away. Below are the five most common mistakes, and how to fix them.

1. You optimise for revenue instead of profit A campaign with lots of revenue feels good, but tells you nothing about what you actually keep. A product with a 12% margin and an 18% ACoS sells at a loss — every order costs you money. Calculate your break-even ACoS (your gross margin) per product and adjust any campaign that consistently exceeds it. Profit is the benchmark, not revenue.
2. You ignore TaCoS ACoS only looks at paid sales. But ads often boost your organic sales too. By looking at ACoS alone, you misjudge your true return — sometimes too negatively, sometimes too positively. TaCoS (Total Advertising Cost of Sales) measures your ad costs against your total revenue and gives a fairer picture of what advertising actually earns you.
3. You let bad search terms eat your budget Every search term report contains terms that cost clicks but never convert. Leave them in place and you pay for losers every month. Review your search term report regularly, block non-converting terms as negative keywords, and move the winners into exact campaigns where you can target your bids precisely.
4. You advertise 24/7 at a single bid Your audience doesn’t buy at the same pace every hour. Yet most campaigns run day and night at the same bid — including the hours when hardly anyone orders. With dayparting, you lower your bid (or pause) during dead hours and push harder during peak moments. The result: less wasted budget and a lower ACoS while revenue stays the same.
5. You adjust bids manually and too late The market, your competition and your stock change daily. Adjusting manually isn’t just time-consuming — you’re always one step behind. With automated rules (“if ACoS > 25%, lower bid by 10%”) you optimise 24/7 based on your own thresholds — without having to check in every day. From scattered mistakes to control These five points share one thing in common: they demand constant attention that, as a business owner, you simply don’t always have. That’s exactly what Advindix was built for — as an official Bol Silver Partner, we combine dayparting, smart rules, budget control and TaCoS/margin insight in one dashboard, so your ACoS drops without you having to dive into it manually every day. Want to see where budget is leaking in your account? Start your 14-day free trial, connect your bol store — and we’ll go through it together.