The question most brands ask when evaluating Amazon PPC agencies: "How much does it cost?" That is the wrong question.
The right question is: what will my TACoS be 90 days after I hire this agency, and what will my total revenue look like at month 12? The agency fee is a line item. The cost of bad PPC management — wasted ad spend, suppressed organic rank, missed keyword opportunities, compounding budget bleed — is often ten times the agency fee itself.
Cheap PPC management is not a savings. It is usually the most expensive decision you make this year.
How Amazon PPC Agencies Typically Price Their Services
There are three common fee structures in the Amazon PPC agency market. Each has different implications for how your interests and the agency's interests align:
Percentage of Ad Spend
The most common model. Agencies charge 10–20% of your monthly ad spend as their fee. On $20,000 in monthly ad spend, that is $2,000–$4,000 per month to the agency.
The structural problem is obvious: the agency earns more money when you spend more on ads — regardless of whether more spend improves your outcomes. The incentive to scale your ad spend is built into the fee model. Cutting wasted spend, which is often the highest-impact thing a real PPC manager can do, reduces the agency's revenue.
We do not price this way at OBG. We have seen too many accounts where percentage-of-spend agencies let budgets run high on low-performing campaigns simply because reducing spend meant reducing their fee.
Flat Monthly Retainer
A fixed monthly fee regardless of ad spend. Typical range in the market: $1,500–$8,000/month depending on catalog complexity, number of ASINs managed, and the agency's positioning. This model better aligns incentives — the agency makes the same amount whether you spend $10,000 or $50,000 on ads, so there is no financial incentive to inflate spend.
The risk with flat retainers is on the other side: agencies that take on too many clients at a flat fee are incentivized to underservice each one. If the economics demand 40 clients at $2,000/month, each account gets less attention than it deserves. Ask how many accounts each strategist manages. The answer tells you a lot about the depth of management each client actually receives.
Retainer Plus Performance Fee
A base retainer with an additional performance component tied to revenue growth or profitability improvement above a baseline. This model aligns agency incentives most directly with client outcomes — the agency only earns the performance component if the client's business actually improves. It also requires clearly defined baseline metrics, which forces a real conversation about what success looks like before the engagement starts.
This is the model we believe in at OBG. We want our economics tied to whether your business grows, not to the volume of ad spend we help you generate.
What the Market Rate Actually Looks Like
Here is a realistic breakdown of Amazon PPC agency pricing by tier:
- Budget agencies and freelancers ($500–$1,500/month): Typically limited to basic campaign setup and occasional bid adjustments. No proprietary frameworks, no strategic phase management, minimal SQP analysis. The work often follows a template applied across every client regardless of category, lifecycle stage, or competitive dynamics. This tier can maintain an existing account at roughly its current performance. It rarely produces meaningful growth.
- Mid-market agencies ($1,500–$5,000/month): More experienced teams, more structured processes, more consistent communication. Quality varies significantly by agency. The differentiator at this tier is not the price — it is whether the agency has a real strategic framework or is running the same generic campaign structure for everyone. Ask specifically how they manage a launch-phase product differently from a mature one. The answer tells you whether they have a framework or a formula.
- Premium agencies ($5,000–$15,000+/month): Dedicated strategists, proprietary frameworks, tool stacks that produce real insight rather than just automated reporting. Access to specialists across listing optimization, creative, and PPC who work as a coordinated team rather than siloed departments. At this tier, the fee is not the cost — the cost of not having this level of management is.
These ranges are for management fees only. Ad spend is separate — and is where the real money flows. A $2,000/month management fee with $30,000 in monthly ad spend is a very different conversation than a $5,000/month fee with $8,000 in ad spend.
The Real Cost of Cheap PPC Management
Here is what we see in accounts that have been managed by low-cost or inexperienced agencies:
No negative keyword management. Auto and broad match campaigns that have been running for six months with no negation are typically spending 15–25% of budget on irrelevant traffic. On $20,000 in monthly spend, that is $3,000–$5,000 wasted every month. Over a year: $36,000–$60,000 in ad spend that produced nothing. The cheap agency saved you $2,000/month. The neglect cost you five times that in wasted spend alone.
No phase-aware strategy. Launch-phase campaign logic running indefinitely on a product that has been live for 18 months. No trimming cycle. No graduation of auto-campaign converting terms into exact match campaigns. The account looks active. It is not being managed strategically.
Missing organic rank opportunities. A skilled PPC manager uses SP campaign data to build organic rank — not just to generate ad-attributed sales. Accounts that are not managed with organic rank as an explicit goal are paying for every sale indefinitely, instead of building the organic engine that eventually generates sales without ad spend. The compounding cost of this is enormous over 12–18 months.
Blended reporting that hides problems. Account-level ACoS that blends branded and non-branded keywords, making the efficiency look better than it is. TACoS never reported. Organic rank never mentioned. The report looks clean. The business is underperforming what it could be.
What to Look For Beyond the Price Tag
When evaluating any Amazon PPC agency — at any price point — ask these questions before the fee conversation:
- "What metric do you primarily optimize for — ACoS or TACoS — and what is your reasoning for that choice?" An agency that optimizes for ACoS is managing for ad efficiency. An agency that optimizes for TACoS is managing for business growth. These are different jobs.
- "How does your campaign structure change between a product in its first 60 days versus a product that has been live for 18 months?" If the answer does not involve meaningfully different strategies for different lifecycle phases, the agency does not have a framework — they have a template.
- "How do you handle negative keyword management and how often?" If the answer is vague or infrequent, budget is being wasted on your behalf right now.
- "What tools do you use and what do they specifically do for my account?" Agencies that cannot name their tools or explain what they actually do with them are not running a sophisticated operation.
- "What does the first 90 days look like and what will I be able to measure at day 90 to evaluate whether the engagement is working?" A good agency can answer this specifically. A weak agency will give you generalities about "optimizing your account" and "improving ROAS."
OBG's Model and What You Actually Get
We operate on a retainer model with performance alignment. Every engagement begins with a full account audit — campaign structure, keyword coverage, SQP analysis, TACoS calculation by ASIN, and breakeven modeling using Sellerise. We tell you exactly where you are before we charge you anything.
Then we manage through our PPC Product Lifecycle Framework — four phases, phase-appropriate targets, TACoS as the north star metric. We use Scale Insights for bid automation, DataDive for keyword research, Sellerise for profitability tracking, and AMC audiences for conversion rate optimization. We report on TACoS, organic ranking movement, total revenue trend, and new-to-brand acquisition — not just campaign-level ACoS.
And we back it with a 30-day profitability guarantee. If we cannot show you a clear path to better outcomes within the first 30 days, you do not owe us for that time.
Minerva Research Labs came to us after cycling through two agencies that had managed their account for over a year without meaningful revenue growth. We relisted, restructured PPC, and applied operational strategies that increased contribution margin significantly. The previous agencies were cheaper. The previous agencies were also costing them far more than our fee in wasted spend and missed opportunity.
Work With OBG
The right question is not what the agency costs. It is what a better-managed account will produce 90 days from now — and what the gap between current performance and optimized performance is worth to your business. That gap is almost always larger than any reasonable agency fee.
OBG offers a free strategy call and a 30-day profitability guarantee. Let us show you exactly what we would do with your account, what it would cost, and what we expect the outcome to be. Schedule your free strategy call and get a straight answer on whether we are the right fit.