Sources & References Policy

Every figure on CostsAZ is sourced from a real, citable government or institutional origin. This page explains what counts as an acceptable source for us.

What We Accept

• Official government fee schedules and agency websites (e.g., U.S. Department of State, USCIS, state Secretary of State offices)
• International institutions with public data platforms (e.g., the World Bank’s Purchasing Power Parity dataset)
• Primary legal/regulatory publications where a fee or tax rate is formally set

What We Don’t Use

We do not use crowdsourced estimates, unverified forum posts, or “average cost” articles without a named primary source as the basis for a published figure.

Linking to Sources

Wherever possible, we link directly to the official source on the same page as the figure, so you can verify it yourself.

Suggest a Source

Know of an official data source we should be using? Tell us at contact@costsaz.com.