The SellersNest blog
Seller Guides & Fee Breakdowns
Plain explanations of what selling online actually costs, with the calculator that answers each one.
TikTok Shop Affiliate Commission for BFCM 2026: Sample ROI Checklist
Set TikTok Shop creator commissions and sample budgets for BFCM 2026. Compare collaboration types, model profit, and track creator ROI.
TikTok Shop Late Dispatch Rate 2026: Scan Deadlines & Appeals
Learn TikTok Shop’s 2026 late dispatch rules, carrier scan deadlines, LDR thresholds, Seller Center checks and appeal evidence before BFCM.
TikTok Shop Peak Shipping Rates 2026: Seller Checklist
See TikTok Shop’s 2026 peak shipping increases, oversized-package surcharges and margin checks through January 17, 2027.
eBay Video Ads for Q4 2026: 15-Second Listing Plan
Plan 15-second eBay video ads with Priority CPC budgets, approvals and Q4 tests.
Mercari Holiday Shipping 2026: Protection Checklist
Protect Mercari holiday orders with correct labels, scans and packaging.
eBay Used – Part on Vehicle: 2026 Seller Guide
eBay Used – Part on Vehicle: CARE eligibility, inspection workflow and Q4 tips.
Amazon Black Friday Deals 2026: October 20 Submission Checklist
Amazon Black Friday deal deadline, fees and profit checks for October 20, 2026.
Amazon FBA October 28 Deadline: 2026 Holiday Inbound Checklist
Prepare FBA inventory for Amazon’s October 28 holiday arrival deadline and avoid delays.
eBay Handling Time for Holiday 2026: Delivery-Date Checklist
Set accurate eBay handling times and protect holiday delivery dates.
Etsy Holiday Trends 2026: Turn Search Data Into Listings
Use Etsy’s 2026 trend data to improve products, photos, titles and tags.
Shopify Compare-at Price for BFCM 2026: Sale Badge Checklist
Set Shopify compare-at prices for BFCM and sync sale pricing to Google.
Shopify Overselling Prevention for BFCM 2026: Inventory Checklist
Prevent Shopify overselling with inventory, location and bundle checks.
eBay Bundle Discounts 2026: Q4 Profit and Shipping Guide
Set profitable eBay bundle discounts and combined shipping for Q4 2026.
eBay Offers to Buyers 2026: Q4 Discount and Profit Guide
Send profitable eBay offers to interested buyers without over-discounting in Q4.
Walmart Marketplace Holiday 2026: Late Q4 Seller Checklist
A late-Q4 Walmart seller checklist for inventory, listings, shipping, fees and holiday profit.
Amazon FBA Missing Inbound Claims: New 30-Day Rule
Amazon FBA inbound claims now have a 30-day limit. Follow this Q4 checklist.
Amazon FBA Capacity Limits 2026: Q4 Restock Plan
Amazon FBA capacity limits for Q4: cubic feet, restocks and Capacity Manager fees.
Shopify Product Bundles for BFCM 2026: Margin and Inventory Checklist
Plan profitable Shopify BFCM bundles with inventory, discount and margin checks.
Shopify Abandoned Checkout Recovery for BFCM 2026
Set up Shopify abandoned checkout emails, test timing and protect BFCM margin.
Amazon FBM Holiday Returns 2026: Refund Workflow and Cost Reserve
Plan Amazon FBM holiday returns, inspections and refund cash flow for 2026.
Etsy Share & Save 2026: 4% Fee Refund Holiday Plan
Use Etsy Share & Save links to earn 4% back on eligible holiday orders.
Shopify EU Import Duty 2026: €3 Rule and Q4 Checkout Checklist
Shopify EU duty setup for Q4 2026: €3 tariff-code rule, HS codes, DDP and IOSS.
eBay Time Away 2026: Holiday Pause vs Keep Selling
Choose whether to pause eBay sales or keep selling during a holiday break.
Google Merchant Center Promotions for BFCM 2026: Approval Checklist
Set up and test Google Merchant Center promotions before BFCM 2026.
Etsy Personalized Gifts for Christmas 2026: Order Cutoff Checklist
Plan Etsy personalized-gift cutoffs and checkout fields for Christmas 2026.
Etsy Purchase Protection 2026: $250 Holiday Order Checklist
Use Etsy’s $250 protection checklist for holiday orders, tracking and cases.
TikTok Shop BFCM 2026: November 11–30 Seller Checklist
Prepare TikTok Shop BFCM pricing, stock, fulfilment and returns for 2026.
Black Friday Break-Even Units: Set a Profitable BFCM Sales Target
Calculate the BFCM orders needed to recover discounts, ads and fixed costs.
Amazon Business Hour Delivery Rate: 90% Rule Before October 30
Amazon BHDR 2026 guide: 90% rule, October 30 deadline and FBM recovery steps.
Facebook Seller App 2026: AI Listing Workflow for Holiday Sellers
Create faster holiday Marketplace listings with Facebook Seller app and Meta AI.
Shopify Gift Card Fees 2026: Holiday Profit Checklist
Calculate Shopify gift card fees, discounts and holiday profit before launch.
Shopify Chargebacks for BFCM 2026: Fraud and Evidence Checklist
Shopify chargeback fees, fraud checks and BFCM evidence checklist for sellers.
AI Shopping Optimization for Holiday 2026: Make Products Findable
Q4 AI shopping checklist for product data, feeds, stock, schema and shipping.
eBay Item Not Received Claims: 2026 Seller Protection Checklist
eBay INR checklist for tracking, deadlines, signature proof and seller protection.
Amazon Product Title Rules 2026: The 75-Character Q4 Checklist
Amazon 75-character title checklist for Item name, Item Highlights and Q4.
Amazon Coupon Fees 2026: Is Your Q4 Discount Profitable?
Calculate Amazon coupon fees, discount cost and profit before Q4 campaigns.
1099-K Threshold 2026: What Online Sellers Need to Know
2026 Form 1099-K threshold and year-end marketplace records for online sellers.
Black Friday Inventory Planning 2026: How Much Stock Should You Order?
Forecast BFCM demand, safety stock and order quantities before Black Friday.
Shop Pay Installments for BFCM 2026: Will BNPL Increase Profit?
Test Shop Pay Installments fees, margin and BFCM break-even sales.
Etsy Cyber Specials 2026: October 27 Opt-In and Profit Test
Etsy Cyber Specials 2026: dates, 25% discount math and listing checklist.
Google Merchant Center Holiday Feed Checklist for 2026
Holiday Google Merchant Center checklist for prices, stock, shipping and images.
USPS Holiday Shipping Surcharges 2026: Seller Cost Guide
USPS 2026 holiday surcharge dates, rates and margin checks for online sellers.
Daraz 11.11 Seller Checklist: Pricing, Stock and Listings for 2026
Prepare Daraz pricing, stock, listings and fulfilment for the 2026 11.11 sale.
Poshmark Seller Recognition Program 2026: Requirements and 90-Day Math
Poshmark’s 2026 seller recognition thresholds, 90-day rules and launch timing.
Amazon FBA Holiday Peak Fees 2026: October 15 Margin Test
Amazon holiday peak fees 2026: dates, surcharge math and inventory deadlines.
Shopify Black Friday Discount Stacking: Protect Margin in 2026
Test Shopify discount combinations before BFCM and protect margin.
eBay Promoted Listings Fees: General vs Priority for Holiday 2026
Compare eBay General and Priority ad fees and protect holiday profit.
Etsy Holiday Shipping Profiles: Processing Times for 2026
Set Etsy processing profiles and delivery dates for the 2026 holiday rush.
Holiday Return Policy 2026: Set Deadlines Without Losing Margin
Set holiday return deadlines, exclusions and refund costs without guesswork.
Holiday Gift Guide Backlinks: Vet Placements Before You Pay
Vet holiday gift-guide sites and paid placements before you spend.
Depop Selling Fees 2026: What US and UK Sellers Actually Keep
Calculate Depop processing and boost fees, then price for real profit.
Black Friday Product Page SEO: Titles, Meta Descriptions and Share Cards for 2026
Write stronger Black Friday titles, meta descriptions and social previews.
Holiday Shipping Cutoff Dates 2026: A Seller’s Order-Deadline Formula
Set safer holiday order deadlines using processing, transit and delay buffers.
Black Friday Free Shipping Threshold: A Profit Formula for 2026
Set a profitable free shipping minimum using margin, postage and target profit.
Poshmark Bundle Discounts: How to Protect Profit in 2026
Price Poshmark bundles without sacrificing seller profit.
Black Friday Discounts: Price Sales Without Losing Profit in 2026
Set profitable Black Friday discounts with formulas and a free calculator.
AI Product Listing Workflow: A Human-Checked Q4 Process for Sellers
Build accurate AI-assisted product listings with a practical seller QA checklist.
Prime Big Deal Days 2026: Last-Minute Seller Checklist
Prepare pricing, inventory and ads for Prime Big Deal Days 2026.
Amazon Low-Price FBA Fees: The $9.99 Profit Test
Calculate Low-Price FBA savings and protect Q4 profit.
StockX Seller Fees and Levels: What You Pay in 2026
Calculate StockX seller fees and your next level.
Mercari Selling Fees: What Sellers Pay and Keep
Calculate Mercari’s 10% selling fee, including buyer-paid shipping, and see payout, profit, withdrawal and pricing examples for US sellers.
TikTok Shop Seller Fees: What US Sellers Pay in 2026
Learn TikTok Shop’s 2026 US seller fees, referral-fee formula, affiliate costs, refund charges and real profit with worked examples.
Is an eBay Store Worth It? Calculate Your Break-Even Point
Compare eBay Store plans and calculate when Basic or Premium becomes cheaper.
Etsy Ads ROAS: Calculate Your Break-Even Point
Learn how Etsy Ads ROAS works, calculate your break-even return, estimate CPC profit and decide which listings deserve more ad budget.
Etsy VAT Explained: UK and EU Seller Guide
Understand Etsy VAT on buyer orders and seller fees, calculate VAT-inclusive prices, and check UK and EU registration rules.
Amazon FBA Storage Fees: Monthly and Aged Stock Costs
Calculate Amazon FBA monthly storage, understand Q4 rates and aged-inventory surcharges, and reduce costs before slow stock destroys profit.
Etsy Listing Renewal Fees: What Sellers Pay
Learn Etsy’s $0.20 listing renewal fee, auto-renew sold charges, multi-quantity costs and when to choose automatic or manual renewal.
How Much Does Poshmark Take? Seller Fees Explained
Calculate Poshmark’s $2.95 and 20% seller fees, see payout examples and set profitable prices and offer limits before you sell.
Gross Profit vs Net Profit: What Ecommerce Sellers Actually Keep
Learn gross profit vs net profit for ecommerce, calculate both margins correctly and find the costs that quietly reduce what your store keeps.
FAQ Schema for Ecommerce: Does It Still Help SEO?
Learn when ecommerce sites should use FAQ schema, how to create valid JSON-LD, Google’s rich-result limits and common markup mistakes.
Etsy Combined Shipping: Set Additional Item Rates Without Losing Money
Learn how Etsy combined shipping works, calculate profitable additional-item rates and avoid undercharging for multi-item orders.
Etsy Star Seller Requirements: How to Reach Every Target
Learn Etsy Star Seller requirements, calculate your 95% response and shipping targets, improve a 4.8 rating, and track progress toward the badge.
Etsy Offsite Ads: Fees, Opt-Out Rules and Break-Even Math
Learn how Etsy Offsite Ads fees work, when you can opt out, how the 30-day attribution window applies, and whether attributed orders remain profitable.
Customer Lifetime Value: How Ecommerce Sellers Calculate CLV
Learn how to calculate ecommerce customer lifetime value, compare CLV with acquisition cost, and increase repeat purchases without hurting profit.
Contribution Margin: What Each Ecommerce Order Really Earns
Learn how to calculate ecommerce contribution margin, include the right variable costs, find break-even volume and make better pricing decisions.
Safety Stock Formula: How Online Sellers Avoid Stockouts
Learn how to calculate safety stock using demand and supplier lead time, set a better reorder point and avoid excess ecommerce inventory.
Sell-Through Rate: How Online Sellers Find Slow Stock
Learn how to calculate ecommerce sell-through rate, compare SKUs, diagnose slow inventory and improve stock decisions without destroying margin.
ROAS vs ROI: Which Ecommerce Ad Metric Actually Matters?
Learn the difference between ROAS and ROI, calculate both correctly, include real ecommerce costs and judge whether an ad campaign is truly profitable.
Inventory Turnover Ratio: How Online Sellers Find Slow Stock
Learn how to calculate inventory turnover, convert it to days of stock, identify slow SKUs and improve reordering without causing stockouts.
Break-Even Point for Online Sellers: Formula and Examples
Calculate your ecommerce break-even point using fixed costs and contribution margin. Includes formulas, examples, discounts, returns and target profit.
Landed Cost Formula: Calculate the True Cost of Imported Products
Learn how to calculate landed cost per unit, including freight, duties, customs, insurance and handling, before setting a profitable selling price.
Ecommerce Return Rate: How to Calculate It and Reduce Avoidable Returns
Learn how to calculate ecommerce return rate, measure the real cost of refunds, find avoidable causes and reduce returns with better listings and packaging.
How to Create SKU Numbers for Inventory Without Making a Mess
Learn how to create a simple SKU system for ecommerce inventory, product variations, spreadsheets, stocktakes and reorder decisions.
Ecommerce Conversion Rate: How to Calculate and Improve It
Learn how to calculate ecommerce conversion rate and improve product pages with better images, trust signals, shipping details and profitable pricing.
Customer Acquisition Cost: How Online Sellers Know If Marketing Pays
Learn how to calculate customer acquisition cost, compare CAC with profit and lifetime value, and decide whether your ecommerce marketing is sustainable.
Average Order Value: How Online Sellers Can Increase Basket Size
Learn how to calculate average order value and increase ecommerce basket size with bundles, add-ons, shipping thresholds and profitable offers.
eBay Seller Fees Explained: What eBay Actually Takes
Most eBay sellers pay a final value fee of about 13.6 percent of the total sale plus a per-order charge of 30 to 40 cents. Across categories the rate ranges…
The $800 De Minimis Exemption Is Gone: What It Changes for Your Pricing
The United States has ended the $800 de minimis exemption, so packages arriving from outside the US now clear customs with real duties attached. The…
Markup vs Margin: The Difference That Quietly Costs Sellers Money
Markup measures profit against your cost. Margin measures profit against your selling price. A $10 item sold for $15 carries a 50 percent markup but only a…
How to Price Handmade Products Without Working for Free
Price handmade products by adding materials, your labour at a real hourly rate, and overhead, then applying a markup. Most makers skip the labour line…
Amazon FBA Fees Explained: When FBA Is Worth It and When It Is Not
Amazon FBA costs you a referral fee, usually around 15 percent of the sale price, plus a fulfilment fee based on the item's size and weight. Below roughly…
What Is ACoS? Break-Even ACoS Explained for Amazon Sellers
ACoS is advertising cost of sale: your ad spend divided by the revenue those ads produced. There is no universally good ACoS. What matters is whether yours…
Why Your Shipping Costs More Than the Item Weighs
Carriers charge for the space a parcel occupies as well as its weight. Multiply length by width by height, divide by the carrier's DIM divisor, and if that…
How Deep Can You Discount Before You Lose Money?
The largest discount you can afford is equal to your profit margin. If you keep 35 percent of each sale after all costs, a 35 percent discount takes you to…
Print on Demand Profit Margins: The Real Numbers
Print-on-demand margins are thin because base cost plus supplier shipping typically takes 60 to 70 percent of a normal selling price before marketplace and…
Etsy vs eBay vs Shopify: Which Actually Costs Less to Sell On?
Etsy takes roughly 11 to 15 percent of an order before ads, eBay around 12 to 16 percent, and Shopify charges no commission but bills a monthly subscription…
What Is a Good Profit Margin for an Online Seller?
Most healthy small ecommerce businesses run a net margin between 10 and 20 percent, with handmade and niche products often higher and resale or dropshipping…
Etsy's AI Disclosure Rules: What Sellers Must Do Now
Etsy began enforcing a generative AI disclosure requirement on 14 January 2026. If you used AI to create a listing image, description, mockup or design, you…
Depop vs Poshmark vs Mercari: Which Resale App Pays You Most?
On a $35 sale, Poshmark's 20 percent commission takes about $7, Depop's roughly 10 percent marketplace fee plus payment processing takes close to $5, and…
PayPal Fees for Sellers: What You Actually Receive
PayPal typically takes around 3.49 percent plus a fixed fee on commercial transactions in the US, with different rates for international payments and…
Shopify Fees Explained: Subscription, Processing and the Break-Even Point
Shopify charges no sales commission. You pay a monthly subscription plus payment processing of roughly 2.9 percent and $0.30 per order on the entry plan…
Sales Tax for Online Sellers: A Practical Starting Point
In most US states, marketplace facilitator laws mean Etsy, eBay and Amazon collect and remit sales tax on your behalf. Selling through your own store is…
How to Never Run Out of Stock (or Drown in It)
Your reorder point is daily sales multiplied by supplier lead time, plus a safety buffer. Sell eight units a day with a 14-day lead time and a week of…
Etsy SEO: Writing Titles and Tags That Actually Rank
Etsy search reads your title, tags, categories and attributes together. The strongest titles put the most specific buyer phrase first, avoid repeating the…
How to Write Product Descriptions That Sell
A description that converts answers three things fast: what the item is, who it suits, and what happens after they buy. Buyers skim, so the first two lines…
How to Respond to a Bad Review Without Making It Worse
Reply briefly, acknowledge the specific problem, say what you will do, and move the conversation to a private channel. Your reply is not for the reviewer…
Product Image Sizes for Every Marketplace
Most marketplaces want a square image of at least 1000 by 1000 pixels, with Etsy favouring landscape for the first photo and Amazon requiring the product to…
Bulk Listing: How to Clean a CSV Before You Import It
Most failed bulk uploads come from four things: stray whitespace, duplicate SKUs, inconsistent column headers, and numbers stored as text. Fixing them…