Amazon PPC advertising is one of the most powerful tools available to brands on the platform. It's also one of the easiest places to waste money.
The barrier to entry is low — anyone can set up a Sponsored Products campaign in minutes. But the gap between "running ads" and "running ads profitably" is enormous. Most brands we talk to are spending $5,000-$20,000+ per month on Amazon advertising with only a vague sense of whether it's actually working.
Here's the most common reasons your Amazon PPC is probably wasting money, and what to do about each one. For Buy Box context that directly affects whether your ads run, read how to win the Amazon Buy Box. Our team covers the full funnel under advertising & PPC.
1. You're Running the Same Campaign Structure You Set Up a Year Ago
Amazon's advertising platform evolves constantly. New ad types, new targeting options, new bidding strategies. If your campaign structure hasn't been meaningfully updated in months, it's almost certainly underperforming.
A common pattern: you set up a few auto campaigns and some broad match manual campaigns when you launched. They performed reasonably well at first. Now they're bloated with irrelevant search terms, your bids haven't been adjusted for seasonal competition changes, and you're paying for clicks that don't convert.
The fix: Regular campaign audits. At minimum, review your campaign structure quarterly. Look at search term reports, prune irrelevant terms, harvest high-performing search terms into exact match campaigns, and adjust bids based on current conversion data.
2. You're Not Using Negative Keywords
This is the single most impactful and most neglected optimization in Amazon PPC. Without negative keywords, your ads show up for search terms that are irrelevant to your product. You're paying for clicks from people who were never going to buy.
Check your search term report. If you see terms that have nothing to do with your product generating clicks but zero conversions, those terms need to be added as negative keywords immediately.
The fix: Review your search term report weekly. Any search term that has generated significant spend with zero conversions should be evaluated for negative keyword addition. Be aggressive about this — it's the fastest way to reduce wasted spend.
3. You're Treating ACoS as Your Primary Metric
ACoS (Advertising Cost of Sale) is important, but it's not the whole picture. Brands that optimize exclusively for ACoS tend to cut spend on campaigns that are actually driving long-term growth.
The metric you should be watching alongside ACoS is TACoS (Total Advertising Cost of Sale) — your ad spend as a percentage of total revenue (both ad-attributed and organic). A healthy TACoS trend tells you that your advertising is building organic momentum, not just buying temporary sales.
If your ACoS is improving but your TACoS is flat or rising, your ads are becoming a crutch rather than a growth engine. If your TACoS is declining over time, your advertising is doing its job — building organic rank and brand awareness that generates sales even without ads.
The fix: Track TACoS alongside ACoS. Use advertising to build organic rank for your most important keywords, then gradually reduce spend on those keywords as organic rank improves. Reinvest the savings into new keyword expansion.
4. You're Not Segmenting by Match Type
Running all your keywords in broad match is like fishing with a net — you'll catch a lot, but most of it isn't what you wanted. Running everything in exact match is like fishing with a spear — precise but limited.
The best PPC structures use a match type waterfall: auto campaigns for discovery, broad match for expansion, phrase match for refinement, and exact match for your proven winners. Each match type serves a different purpose and should have different bid levels and expectations.
The fix: Build a tiered campaign structure where search terms graduate from auto to broad to exact as they prove themselves. Your exact match campaigns should contain your top-performing, highest-converting keywords with the highest bids. Your broad match campaigns should be discovery engines with lower bids and aggressive negative keyword management.
5. You're Ignoring Sponsored Brands and Sponsored Display
Many brands only run Sponsored Products campaigns and ignore the other ad types entirely. That's a missed opportunity.
Sponsored Brands campaigns put your brand logo, a custom headline, and multiple products at the top of search results. They're powerful for brand awareness and driving traffic to your Brand Store. Sponsored Display campaigns can retarget shoppers who viewed your products but didn't purchase, and target competitor product pages.
A full-funnel advertising strategy uses all three ad types working together: Sponsored Brands for top-of-funnel awareness, Sponsored Products for mid-funnel conversion, and Sponsored Display for retargeting and competitive conquest.
The fix: If you're only running Sponsored Products, test Sponsored Brands and Sponsored Display campaigns. Start with small budgets and scale what works. The brands seeing the best results on Amazon are using all available ad formats strategically. For official overviews, see Amazon Ads.
6. You're Losing the Buy Box and Your Ads Aren't Running
This is the invisible waste that most brands don't even realize is happening. Your Amazon ads only run when you hold the Buy Box. If unauthorized sellers are winning the Buy Box 30% of the time, your ads are only running 70% of the time.
But you're still paying for the campaigns to exist, and when the ads do run, some of that traffic converts for the unauthorized seller instead of you. You're effectively subsidizing someone else's sales.
The fix: Monitor your Buy Box ownership percentage. If it's below 90%, you have a pricing or unauthorized seller problem that needs to be addressed before you invest more in advertising. No amount of PPC optimization can overcome a Buy Box problem.
7. You Don't Have Clear Profitability Targets
"Make sales" is not a PPC strategy. Without clear profitability targets at the keyword, campaign, and product level, you're flying blind.
You need to know your break-even ACoS for each product — the maximum ACoS at which advertising is still profitable after accounting for product cost, Amazon fees, FBA fees, and your margin requirements. Every keyword and campaign should be evaluated against this threshold.
The fix: Calculate your break-even ACoS for each product. Set target ACoS goals below break-even to ensure profitability. Review performance against these targets weekly and make adjustments.
When to Get Help
If you recognized your situation in three or more of these points, your PPC isn't just underperforming — it's actively burning money. The good news is that PPC optimization is one of the areas where professional management pays for itself fastest, because the waste you're currently experiencing turns into recovered margin almost immediately.
The brands we work with typically see a 25-40% improvement in advertising efficiency within the first 60 days — not by spending less, but by spending smarter. And because we work on a buy-sell model, every dollar of wasted ad spend comes directly out of our margins. That's a level of incentive alignment you won't get from an agency billing you hourly for PPC management.
New to how we work? Start with what is 2P selling on Amazon or the 2P Central homepage.