AmzLoss- The cost of a rate cut isn't the rate difference — it's the difference applied to your paid lines each month.
- Include returns, discounts and the eligible-order-amount rule in the calculation, or you overstate the loss.
- Free calculator method: sum net commission at the old rate vs the new rate on the same orders.
- Total the shortfall across a full billing period to decide whether a niche is worth keeping.
Knowing a category "dropped from 4.5% to 1%" is useful, but the number that should drive your decisions is how many dollars that change removes from your account this month. That figure is measurable in minutes with the right approach — no spreadsheets required.
The correct formula
Cost of the cut = (old rate − new rate) × eligible order amount, summed across every affected paid line, after returns and discounts are removed. The eligible order amount is the post-discount order value minus excluded fees like gift wrap and delivery. Applying the rate to the list price inflates the loss, so always start from the eligible amount.
Concretely: suppose you earn from a product that generated €1,200 of eligible order amount in a month. At 4.5% that would have paid €54. At the 2026 rate of 1%, it pays €12. The cut costs you €42 on that line alone — and you want every such line summed, not just the average.
Using the calculator to size it
Open the commission calculator, enter the sticker price, the discount applied, and the correct 2026 category rate, and it returns the real commission. Repeat for your handful of highest-earning products. Then compare against what the same entry earned in early 2025 on your report. The gap across your top ten lines is a good proxy for the whole account.
Why returns change the answer
A rate cut and a return both reduce commission, but they are different items in the report. Returns reverse the fee; rate cuts change the multiplier on future sales. When estimating the ongoing cost of the 2026 cuts, use only net-of-return eligible amounts, or you double-count the loss and may drop a category that is still profitable.
Decide with the number, not the headline
Once you have the monthly shortfall, compare it against the traffic and conversion cost of producing that content. If the category's paid lines still clear a believable profit, keep it. If the cut pushes realistic earnings below break-even, reallocate effort to apparel or digital content — and confirm with your earnings report rather than the category table alone.
Related Reading
- How to Verify Your Amazon Affiliate Commission
- Amazon Affiliate Commission Calculator Guide 2026
- Amazon Commission Rates by Category (2026)
Frequently Asked Questions
How do I calculate the exact cost of the commission cut?
Sum (old rate − new rate) × eligible order amount across your affected paid lines for a billing period, excluding returns and discounted amounts, then compare to your prior report.
Do discounts change what the cut costs me?
Yes. Amazon pays on the post-discount eligible amount, so a heavily discounted sale already has a smaller base. The cut's dollar cost is much smaller (or zero) on discounted lines.
Should I use my old or new rate when checking the report?
Use the rate that applied on each order date. Apply 2025 rates to pre-change orders and 2026 rates to later ones — that is exactly how the earnings audit checks each line.