Free sales tax rate data, from the Prophit.ai Sales Tax Atlas
Free to download and free to cite with attribution to Prophit.ai. Every rate aggregates the official state sources — the Atlas pins each figure to the Department of Revenue or Streamlined Sales Tax publication it came from, so you can verify before you rely on it. This is the same content layer that drives Prophit.ai's tax calculation.
Downloadable datasets
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The Sales Tax Atlas carries 51 state and DC guides and over 3,800 county and city rate pages, each with its official source pinned.
Attribution and sources
Cite as: "Source: Prophit.ai Sales Tax Atlas (prophit.ai/resources/sales-tax-atlas)". Underlying figures aggregate official state Department of Revenue publications and Streamlined Sales Tax boundary and rate files; each Atlas page links its specific source. Rates change — verify the pinned source before filing on any figure.