SellerLab Blog

Actionable ecommerce insights for sellers who care about margin.

Track fee changes, pricing playbooks, and marketplace strategy notes, then move from context to calculator-ready decisions without losing the business signal in the noise.

Articles9
Platforms covered3
Latest review2026-05-04

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9 articles matching your current filters.

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Marketplace
TikTok ShopUpdate
TikTok ShopFee Updates
Fee UpdatesTikTok Shop
Fee UpdatesTikTok Shop

TikTok Shop Vietnam Fee Alert: What a Reported 6% Transaction Fee Means for Sellers

If your live TikTok Shop Vietnam notice confirms a 6% transaction fee from 2026-05-09, low-margin SKUs should be recalculated before the extra platform cost leaks into more orders.

Published: 2026-05-04Last reviewed: 2026-05-046 min read
tiktok shop vietnamtransaction feeseller marginaffiliate commission
eBayUpdate
ebay
eBayMarketplace Strategy
Marketplace StrategyeBay
Marketplace StrategyeBay

eBay Service Disruption: What Sellers Should Check After Search, Checkout, and API Issues

Use this checklist to review orders, inventory, ads, and pricing after eBay's 2026-04-26 to 2026-04-27 disruption.

Published: 2026-04-28Last reviewed: 2026-04-284 min read
ebay outageseller operationsapi disruption
TikTok ShopEvergreen
TikTok ShopMarket fee comparison
USUKVNTH
US
UK
VN
TH
CommissionTaxFulfillmentMargin
Marketplace StrategyTikTok ShopEvergreen

TikTok Shop Fees by Market: US vs UK vs Vietnam vs Thailand (2026 Seller Margin Guide)

A market-by-market TikTok Shop margin reality check for operators who do not want to mistake one clean commission number for true profit.

Published: 2026-04-16Last reviewed: 2026-04-168 min read
tiktok shop feesmarket comparisonseller margin
AmazonEvergreen
amazon
Break-even stackThree pricing thresholds
FloorProtect margin
TargetRun default price
PromoDiscount safely
COGSFBA FeesAds
Pricing & MarginAmazonEvergreen

Amazon Break-even Price Playbook (2026 Deep-Dive)

Build a three-layer pricing rule so promotions and ad spend do not push your Amazon listings below acceptable contribution margin.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
break-evenamazon pricingcontribution margin
AmazonEvergreen
FBA
Prime reach
VS
FBM
Control cost
Marketplace StrategyAmazonEvergreen

Amazon FBA vs FBM Margin Update (2026 Deep-Dive)

Compare fulfillment modes with the same margin framework so you can choose by contribution, not by habit.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
fbafbmfulfillment strategy
eBayUpdate
ebay
Fee categoriesRate changes by vertical
Category mixRecheck
Ad safe rateReset
Net marginProtect
Fee UpdateseBay

eBay Fee Changes: 2026 Q2 Deep-Dive

Use the latest eBay fee context to refresh category assumptions and protect net margin before losses spread across the catalog.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
ebay feescategory feesseller margin
eBayEvergreen
ebay
Promoted ListingsContribution margin cap
Ad cap
ROASContributionBid guardrail
Tool GuideseBayEvergreen

eBay Promoted Listings Margin Impact (2026 Deep-Dive)

Use contribution-margin guardrails to decide which eBay listings can support promotion and which ones need a tighter cap.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
promoted listingsadscontribution margin
eBayEvergreen
ebay
Store plan break-evenUpgrade only when math works
StarterBaseline
BasicBreak-even
PremiumScale
Pricing & MargineBayEvergreen

eBay Store Subscription Break-even Guide (2026 Deep-Dive)

Measure store-plan value with break-even math, category mix, and realistic downside scenarios instead of rough volume guesses.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
ebay storesubscriptionbreak-even

Evergreen guides

Core pricing and margin playbooks you can revisit across review cycles.

TikTok ShopEvergreen
TikTok ShopMarket fee comparison
USUKVNTH
US
UK
VN
TH
CommissionTaxFulfillmentMargin
Marketplace StrategyTikTok ShopEvergreen

TikTok Shop Fees by Market: US vs UK vs Vietnam vs Thailand (2026 Seller Margin Guide)

A market-by-market TikTok Shop margin reality check for operators who do not want to mistake one clean commission number for true profit.

Published: 2026-04-16Last reviewed: 2026-04-168 min read
tiktok shop feesmarket comparisonseller margin
AmazonEvergreen
amazon
Break-even stackThree pricing thresholds
FloorProtect margin
TargetRun default price
PromoDiscount safely
COGSFBA FeesAds
Pricing & MarginAmazonEvergreen

Amazon Break-even Price Playbook (2026 Deep-Dive)

Build a three-layer pricing rule so promotions and ad spend do not push your Amazon listings below acceptable contribution margin.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
break-evenamazon pricingcontribution margin
AmazonEvergreen
FBA
Prime reach
VS
FBM
Control cost
Marketplace StrategyAmazonEvergreen

Amazon FBA vs FBM Margin Update (2026 Deep-Dive)

Compare fulfillment modes with the same margin framework so you can choose by contribution, not by habit.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
fbafbmfulfillment strategy
eBayEvergreen
ebay
Promoted ListingsContribution margin cap
Ad cap
ROASContributionBid guardrail
Tool GuideseBayEvergreen

eBay Promoted Listings Margin Impact (2026 Deep-Dive)

Use contribution-margin guardrails to decide which eBay listings can support promotion and which ones need a tighter cap.

Published: 2026-03-22Last reviewed: 2026-04-162 min read
promoted listingsadscontribution margin

Turn blog insights into calculator-ready decisions

Read the context here, then validate your own fee stack, price floor, and margin assumptions with SellerLab Suite tools and comparison guides.