Prophit.ai Sales Tax Engine

5.7easy start · #27 of 28
in Tax Engine Software

Free to practise onnot on record
Free trialnot on record
Well documentedyes
Runs where you worknot on record

Runs on api, Web. Paid plans from $99/mo.

Prophit.ai Sales Tax Engine is ranked #27 of 28 in tax engine software on The Geeks Club. It runs on API, Web. There is no free plan. Paid plans start at $99/mo.

Prophit.ai Sales Tax Engine plans and pricing

All plans

Sales Tax Engine $99/mo Per location; sales-assisted setup; includes 10,000 calculations/month 10,000 calculations/month · no per-state fee prophit.ai · 8 Oct 2026

Compared on tax engine software

Free plan: No
Paid from: $99/mo
Tax return filing: No
Tax registration: No
Marketplace support: Yes

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The record

Purpose: The engine determines sales tax before a transaction is finalized and returns the result to the system that requested it.
Address and jurisdiction: It resolves rooftop addresses and maps them to filing jurisdictions using boundary checks against Census geography.
Tax calculation: It classifies products, exemptions, and separately stated shipping before selecting rates and calculating line-level tax.
Transaction lifecycle: The engine supports quote, apply, commit, adjustment, refund, and void events tied to the transaction document.
Evidence: It retains calculation inputs, resolved jurisdiction, content source, and line-level money math for review.
Integrations: The documented API and file uploads are available, with QuickBooks Online sales activity, Stripe billing, and Workday customer invoices listed as live data connections.
Integration limits: In-checkout real-time apply for QuickBooks, Workday, and Shopify, and Stripe payments, Connect-marketplace, and settlement profiles are described as in development.
Fail-closed controls: Unresolved addresses, ambiguous products, or unknown marketplace responsibility block application instead of prompting a guessed result.
Compliance handoff: Committed determinations flow to Sales Tax Compliance at period close for an independent re-check before return preparation.
Content transparency: The Sales Tax Atlas publishes the engine's content layer, including state guides and local rate pages with official source references.
Who it is for: The page presents the engine for teams connecting checkout, billing, or ERP transaction systems that need real-time sales tax determination.
Company history: Prophit.ai says it was founded in 2019 and has run production tax decisions since 2020.
Price from: $99/mo

Where it ranks on The Geeks Club

Best Tax Engine Software in 2026#27 of 28
Best Sales Tax Software in 2026#23 of 25

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Sources

prophit.ai/products/sales-tax-engine· checked 8 Oct 2026
prophit.ai/faq· checked 8 Oct 2026