There is no universal answer to “agency or in-house.” The right call depends on your revenue, how central Amazon is to your business, and how much day-to-day control you want.
I have run Amazon accounts since 2015 and built an agency after sellers came to me frustrated with agencies that treated them like a number. So this is not a pitch that agencies always win. Each model has real strengths, and the wrong one for your stage costs you money either way.
The guide below lays out the honest case for each, what they actually cost, and how to decide.
TL;DR — the short version
An Amazon PPC agency gives you expertise across many accounts, scale, and no hiring or ramp, which fits most 7 to 9 figure brands. In-house gives you total control and deep brand immersion, which pays off once your Amazon revenue is large enough to fund a full team. The best choice depends on your revenue, your margin, and how hands-on you want to be, and many brands land on a hybrid.
What Amazon PPC Management Actually Involves
Before you choose who runs it, it helps to see the scope of the work. Amazon PPC is not a set-it-and-forget-it channel.
Managing it well means ongoing keyword research, campaign structure, bidding, budget and negative targeting, placement adjustments, and weekly analysis of the search term report. On top of that sits the strategy: setting a target ACoS from your margin and judging performance on profit rather than raw sales.
That workload is why the choice matters. Someone has to own it every week, whether that is your own hire or an outside team, and the cost of doing it poorly shows up fast in wasted spend and lost rank.
The Case for In-House
In-house has one genuine advantage that no external partner can fully match: control and brand depth. A dedicated employee lives inside your margins, your roadmap, and your product line every day.
The upsides are real:
- ●Total control: you set priorities and see every decision as it happens.
- ●Faster pivots: a change in strategy can happen the moment you decide it.
- ●Deep brand immersion: one person focused entirely on your catalog builds context an outside team takes longer to reach.
The catch is cost and coverage. Replicating what a competent agency does usually takes more than one hire, since PPC, listing work, and account operations are different skills, and good Amazon talent takes months to ramp.
The Case for an Agency
An agency trades some of that control for breadth, speed, and lower total cost at most revenue levels.
- ●Pattern recognition: a team managing dozens of brands has seen what works in your category and what Amazon’s latest changes mean in practice.
- ●No hiring or ramp: you get an experienced team on day one instead of a months-long search and training cycle.
- ●Scale on demand: spend can flex up for a launch or Q4 and back down after, without hiring or layoffs.
- ●Lower total cost: one fee usually costs less than a full in-house function of salaries, benefits, tools, and overhead.
The honest downside is control. With an agency you meet less often than you would with an employee at the next desk, and you are trusting their process. That makes choosing the right agency the whole game, since a hands-on partner and a volume shop can look identical on a sales page and behave nothing alike in your account.
What Each Model Really Costs
Cost is where the comparison gets clearer, as long as you compare fairly.
The common mistake is assuming in-house means one hire. To match what a good agency delivers, you generally need a PPC specialist plus support for listings and account operations, and that is a large fixed cost you carry every month regardless of results. Add recruiting, tools, and the ramp time before a new hire is productive.
An agency fee is a single, flexible line item by comparison. For most brands, that math favors an agency until Amazon revenue is large enough that a full in-house team is both affordable and kept fully busy. Our guide on whether Amazon PPC is worth it digs into the return side of that equation.
Where the Hybrid Model Fits
The choice is not always either-or. Many mid-size brands run a hybrid, keeping a strategist or brand owner close to the account while an agency handles the daily optimization.
A hybrid captures brand depth and outside expertise at once, though it asks for tight process integration so nothing falls between the two. A hybrid works best when roles are clear: the agency owns execution and reporting, and your side owns brand, margin, and roadmap.
How to Decide Which Model Fits
Strip away the marketing and the decision comes down to three questions about your own business.
First, how much Amazon revenue do you have? At lower revenue, an agency fee is far easier to justify than a full team, so most growing brands start there. As Amazon becomes a large share of your business, a dedicated in-house function starts to pay for itself.
Second, how central is Amazon to your company, and how much control do you want? If Amazon is your core channel and you want a hand on every lever daily, in-house or a hybrid gives you that. If you would rather own strategy and hand off execution to specialists, an agency fits.
Third, can you actually hire and keep the talent? Good Amazon PPC people are hard to find and take months to ramp, and a single hire who leaves takes your account knowledge with them. An agency spreads that risk across a team, so a departure does not reset your account.
Answer those honestly and the right model usually becomes obvious. Many brands also revisit the question as they grow, moving from agency to hybrid to in-house as revenue and complexity climb. Our case study of an 8-figure Home and Kitchen seller shows what a hands-on partner can do at scale.
What Sets a Hands-On Agency Apart
Not all agencies are the same, and the difference comes down to time per account. As Isaac puts it, “the problem with many agencies is their business model, which prioritizes minimizing time spent on each account to manage more clients, ultimately compromising the quality of service.”
A hands-on agency runs the opposite way. That means a US-based, dedicated account manager who knows your catalog, weekly manual optimization rather than a rules engine left on autopilot, and success measured on your bottom line.
Our Amazon PPC management service is built on that model, and our Inc. 5000 ranking reflects the growth it produces for clients. The point is not the award, it is the hands-on approach that earned it.
When you weigh an agency, the model matters more than the logo. A team that spends real time in your account and reports on profit is worth more than a cheaper one that spreads attention thin.
Questions to Ask Any Amazon PPC Agency
Before you hire, these questions separate a hands-on partner from a volume shop:
- ●Who actually manages my account, and how much time do they spend on it each week?
- ●How do you measure success? A strong answer talks about profit and TACoS rather than only a low ACoS.
- ●How often will we meet, and what will the reporting show?
- ●What is your process for optimization? Look for weekly manual review rather than automated rules alone.
- ●Do I keep full ownership of my account and data? The answer should be yes.
Frequently Asked Questions (FAQs)
Conclusion
Amazon PPC agency versus in-house is a question of fit rather than of one model always winning. In-house buys you control and brand depth at a high fixed cost, while an agency buys you expertise, scale, and lower total spend for most brands. The wrong choice for your stage quietly drains money, so it is worth getting right before you commit.
Match the model to your revenue, your margin, and how hands-on you personally want to be day to day. If you go the agency route, choose one that spends real time in your account and measures success on your profit.
If you want to see what a hands-on approach would do for your brand, get a free Amazon PPC audit and we will show you where the opportunity is.
About the author: Isaac Gross is the founder and CEO of IG PPC, a hands-on Amazon and Walmart PPC agency for 7 to 9 figure brands. An Amazon seller since 2015, he founded IG PPC in 2019, and the firm now manages billions in annual Amazon sales.
