KudTax Tools & Utilities

Between referral fees, FBA fulfilment charges and storage costs, many sellers only discover on the monthly settlement what a sale really cost them. A fee calculator shows the true per-unit margin before you set a price — so you can tell early whether a supposed bestseller is still profitable once every Amazon cost is deducted, and adjust your fulfilment model or pricing deliberately.

Since July 2021, a single EU-wide threshold of €10,000 per year applies to cross-border B2C sales. Above it, the destination country's VAT is due and must be reported through the OSS scheme. Sellers who keep calculating with domestic rates quietly lose margin in higher-rate countries — or risk back payments. Our profit & VAT simulator runs the numbers per destination country.

Pulling invoices from marketplace portals, matching payments, retyping fee statements, answering your tax advisor's queries: each step looks small on its own, but as order volume grows they add up to a fixed block of work every month. The accounting cost calculator converts your actual time spent into euros per month and year — using your own numbers rather than blanket promises.

Yes — every tool is free to use, with no sign-up required. All calculations and file checks (such as the DATEV EXTF validation) run 100% locally in your browser. No accounting, revenue or customer data is transmitted to any server, so you can safely use the tools with real export files without confidential figures ever leaving your device.

The tools show you the numbers — kud.tax then takes over the recurring work behind them: automatic document matching across marketplaces and payment providers, DATEV-ready exports for your tax advisor, and OSS-ready reporting. You can look around in the product tour without signing up, drive a live demo on sample data for 30 days, or start straight away.