What a % of ad spend really costs you.
Most Amazon PPC agencies and tools charge a percentage of your ad spend — so the more you grow, the more they take. See the real annual difference versus a flat fee, and the exact spend where % pricing starts working against you.
Get our occasional Amazon-profit playbook — pricing traps, what we automate on our own account, and how flat-fee changes the math as you scale.
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RedHen manages your Amazon PPC for a flat monthly fee — never a percentage of your spend. Real profit tracking, automated bid rules, keyword harvesting, and negative keywords — changes wait for your approval by default, or run unattended if you switch that on. A $1.5M seller pays the same flat fee as a $50k seller.
See flat-fee pricingRunning it yourself instead? Start with our Amazon PPC automation rules: the conditions, actions and thresholds, ready to copy.
Amazon PPC pricing — common questions
Most Amazon PPC agencies and many tools charge a percentage of your ad spend — commonly 5–20% — sometimes plus a minimum monthly retainer. A few charge a flat monthly fee. The percentage model means your management cost rises automatically every time you scale your ads, even if the work doesn't.
Then the same percentage costs several times more, because ad-attributed sales are usually a multiple of ad spend. On an account spending $4,700 a month on ads and making $13,600 in ad-attributed sales, 5% of spend is $235 a month; 5% of sales is $680. Some agencies quote on sales — both that quoted RedHen Labs' founder did — so check which number the percentage applies to before comparing quotes.
It depends on your spend. At low ad spend, a small percentage can be cheaper than a flat fee. But there's a crossover point — above it, the percentage costs more every month, and it keeps climbing as you grow. This calculator shows you exactly where that line is for your numbers.
Because it taxes your growth. If you double your profitable ad spend, a percentage-based fee doubles too — even though managing the account isn't twice the work. You end up paying more precisely because you succeeded. A flat fee keeps your cost fixed while your sales climb.
RedHen charges a flat monthly fee for Amazon PPC management and profit tracking — never a percentage of your ad spend. A large seller pays the same flat fee as a small one, so your management cost never punishes you for scaling.
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