Amazon profit margins can shrink quickly if sellers don’t monitor costs closely. This guide highlights the key expenses, common margin leaks, and proven strategies to stay profitable in 2025—plus how tools like SentryKit help protect your bottom line.

Staying profitable on Amazon starts with knowing your FBA fees. This guide covers the 2025 fee changes, hidden charges many sellers miss, and the steps you can take to stay compliant, reduce costs, and safeguard your earnings.