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Built for sellers like you

If this sounds familiar, Chart Climber is for you.

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You sell on Amazon FBA or Shopify
Doing real volume — $100K+ a year — where a single fee change actually moves your margins.
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You found out too late, again
The last fee increase or policy change hit before you saw it coming. You repriced after the damage.
🕐
You don't have hours to track it
Between Seller Central, the Federal Register, and tariff news, staying current is a part-time job you don't have time for.
See it for yourself

Here's what just one 2026 fee change is costing you.

Enter your monthly units. This is the kind of dollar math every Chart Climber issue does for you automatically.

Based on Amazon's combined 2026 FBA fee increases of $0.25/unit · Source: Amazon Seller Central
This is what lands in your inbox every Tuesday Issue 4 — Published May 27, 2026
Chart Climber · Issue 4 · May 27, 2026
This is Issue 4. This is what you get every Tuesday.
Fee Watch
Low-Inventory-Level Fee — Now Calculated at FNSKU Level
Amazon changed how the Low-Inventory-Level Fee is calculated in 2026. It now applies at the individual FNSKU level rather than the parent ASIN level. Each FNSKU is assessed separately against the 28-day supply threshold. Now extends to Small Bulky and Large Bulky products. Grocery items remain exempt.
Action required before Prime Day
SIPP Packaging Program
Products not enrolled in Ships in Product Packaging may face fees exceeding $2 per unit for bulky items. SIPP enrollment is available inside Seller Central at no cost.
Check enrollment status
Sources: Amazon Seller Central 2026 fee schedule · eFulfillment Service fee analysis (April 2026)
📋 Policy Radar
Prime Day 2026 — June, Not July. Inventory Deadline: Today.
Amazon confirmed Prime Day 2026 will take place in June — the first time since 2020 it has moved off its traditional July dates. Expected week of June 15 or June 22. AWD inventory deadline was May 27. Deal submissions closed May 26 at midnight Pacific.
Deadline passed — standard FBA only
Supplier Invoice Requirements — April 2026
Sellers must now maintain verifiable supplier invoices and detailed inventory records for all products. Amazon has increased the frequency of spot audits on product authenticity documentation.
Variation Review Policy Ends May 31
The phased variation review adjustment ends May 31. After this date Amazon's updated review display rules are fully permanent. The policy limits review sharing to variations with only minor non-functional differences.
Permanent after May 31
Sources: Amazon Seller Central Prime Day announcement · About Amazon (May 2026)
🌐 Tariff & Trade Wire
Section 122 Tariffs Ruled Invalid — May 7, 2026
The Court of International Trade ruled 2-1 that the 10% global tariffs under Section 122 are invalid. The ruling is expected to be appealed. Section 301 tariffs on Chinese goods were not affected and remain fully active.
IEEPA Tariff Refunds Now Being Processed
CBP opened its CAPE portal for Importers of Record to apply for refunds on IEEPA tariffs paid between February 2025 and February 2026. Refunds include 6% interest. Only the Importer of Record on each entry is eligible. Phase One covers unliquidated entries.
Refund available — act now
Dollar impact of Section 122 removal — non-China sourcing at 500 units/month
Product CostSection 122 RateMonthly Savings
$5 / unit-10%+$250/mo
$10 / unit-10%+$500/mo
$20 / unit-10%+$1,000/mo
$50 / unit-10%+$2,500/mo
Sources: Avalara trade update (May 2026) · Court of International Trade ruling · CBP IEEPA refund portal
📊 Platform Intel
Amazon Rufus — 274M Daily Queries, $10B in Incremental Sales
Amazon's AI shopping assistant Rufus now handles over 274 million daily queries and has driven $10 billion in incremental sales. Products with comprehensive A+ Content and strong review quality are surfacing more frequently in Rufus results.
Amazon Ads Upfront — May 11, 2026
Expanded AI-powered advertising capabilities announced. New ad products rolling out over the next 30-60 days.
Mobile-First Indexing — A10 Now Penalizing Non-Optimized Listings
Amazon's A10 algorithm is now penalizing listings not optimized for mobile in search visibility rankings.

Platform Intel and all past issues are in the subscriber archive.

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The math

$299/month. One caught change pays for a year.

Seller at 2,000 units misses the 2026 fee increase −$6,000/yr
Seller catches IEEPA tariff refund via CBP CAPE portal Refund + 6% interest
Seller at $10 product, 500 units catches tariff shift early +$1,500/mo saved
Chart Climber annual cost $3,588/yr
Break-even: one caught change.
Why Chart Climber exists
"I started Chart Climber because every other tool gives you data, but none of them tell you what it actually costs you. That's all we do."
— Nick, Founder
Every issue sourced from
📜 Amazon Seller Central
🏛 Federal Register
🛃 CBP / Trade Remedies
⚖️ Court of International Trade
📊 Avalara Trade Updates

Every Tuesday.
Every dollar.

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