Seller intelligence
Field notes on marketplace fees, 2026 EPR enforcement, and cross-platform profit math. Written for sellers doing the actual work.
May 29, 2026 · 8 min read
Vinted Pro Germany 2026 guide to fees, access, seller requirements, VAT expectations, and when business sellers should use Pro or stay private.
Use Custom mode in FeeHelper to model your Vinted Pro margin until dedicated Vinted presets are available.
May 29, 2026 · 8 min read
Vinted Pro France 2026 guide covering fees, access, seller requirements, VAT, invoices, and when French sellers should switch or stay private.
Use Custom mode in FeeHelper to model your Vinted Pro margin until dedicated Vinted presets are available.
May 22, 2026 · 9 min read
Learn why Shopify profit margin is often overstated after payment fees, refunds, shipping leakage, discounts, apps, taxes, and ad spend in 2026.
Run a Shopify order through FeeHelper with refunds, shipping, ad spend, and app costs in mind before trusting the dashboard margin. FeeHelper.
May 6, 2026 · 9 min read
See how Vinted Pro Germany 2026 fees affect reseller margins, fixed fees, sourcing costs, bundles, and when to use Custom mode in FeeHelper.
Use Custom mode in FeeHelper to model your Vinted Pro margin until dedicated Vinted presets are available.
May 3, 2026 · 8 min read
Compare paper vs plastic packaging costs under 2026 EPR rules and see when eco packaging can improve marketplace margins for online sellers.
Model the EPR savings from switching materials in the FeeHelper calculator — set the region to DE and swap plastic grams for paper to see the per-order delta.
May 1, 2026 · 10 min read
A plain-English guide to German VAT for online sellers in 2026, covering MwSt, OSS, IOSS, marketplace collection, and DE registration risk today.
See how DE 19% VAT changes your net revenue in the FeeHelper calculator — toggle the VAT-registered flag and watch the break-even move.
April 30, 2026 · 9 min read
See eBay UK fees in 2026, including final value fees, VAT, EPR packaging costs, and shipping choices for international sellers entering Britain.
Test eBay UK fees against your current marketplace in the FeeHelper calculator to see if the switch actually helps your margin.
April 28, 2026 · 9 min read
Learn what US sellers need for EU EPR compliance in 2026, including Germany, France, Spain, marketplace checks, registrations, and packaging fees.
Model the 2026 German EPR fees on a real order in the FeeHelper calculator and see what they do to your margin.
April 26, 2026 · 8 min read
Compare Vinted seller fees in Europe for 2026, including Pro commissions, fixed fees, shipping limits, VAT invoices, and margin impact for sellers.
Use Custom mode in FeeHelper to model your Vinted Pro margin until dedicated Vinted presets are available.
April 24, 2026 · 7 min read
See how .99 vs .00 pricing affects marketplace margins, fee rounding, conversion, and net profit for Etsy, eBay, and Shopify sellers in 2026.
See what a $0.01 price change actually does to your net in the FeeHelper calculator — some platforms round fees at tier boundaries, and the difference is real.
April 22, 2026 · 8 min read
Compare flat-rate and calculated shipping in 2026, including carrier zones, marketplace fees, buyer conversion, and margin impact for sellers.
Test flat-rate and calculated shipping side by side in the FeeHelper calculator — the net profit difference on a real SKU is usually larger than sellers expect.
April 20, 2026 · 6 min read
Understand Etsy fees in 2026, including transaction fees, payment processing, ads, VAT, and packaging costs that affect seller margins by region.
Run your own Etsy listings through the FeeHelper calculator to see the 2026 numbers on your SKUs.
April 18, 2026 · 9 min read
See how Amazon FBA low-inventory fees work in 2026, when they hurt seller margins, and how to avoid overstocking while staying in stock today.
Test the effective FBA cost per unit — including the low-inventory surcharge — in the FeeHelper calculator before committing to a replenishment cadence.
April 12, 2026 · 8 min read
Compare Amazon FBA and Shopify margins in 2026, including referral fees, payment processing, fulfillment costs, and customer acquisition for sellers.
Compare Amazon FBA and Shopify side by side in the FeeHelper calculator to see which platform wins on your SKU.