Disclaimer

These calculators produce estimates for planning. They are not accounting, tax, or legal advice.

Estimates only

Every calculator on this site is a model of a real-world process, and every model leaves things out. Marketplace fees vary by category, size tier, season and region. Tax rules vary by jurisdiction and change annually. Supplier costs vary by volume and negotiation. The output of any calculator here should be treated as a directional estimate, not a figure you can rely on for filing or contracting.

Check the current rate card

Where a rate varies by category or region, the calculators ask you to enter it rather than assuming one. This is deliberate: a hard-coded rate would go out of date and quietly produce wrong answers. Please verify current rates against the official source for your marketplace before committing to inventory.

No professional relationship

Using this site does not create any professional relationship. Nothing here substitutes for advice from an accountant, tax adviser or lawyer familiar with your specific circumstances.

Affiliate relationships

Some pages may contain links to third-party tools for which this site receives a commission if you purchase. This does not change what a calculator computes, and it does not affect the ranking of recommendations, because the calculators do not make recommendations.

No liability

To the fullest extent permitted by law, this site accepts no liability for decisions made on the basis of a calculation performed here. Verify figures that matter before acting on them.