Sales Tax Estimator (U.S. ZIP-Based)

Sales Tax Estimator (U.S. ZIP-Based)

Overview

Sales Tax Estimator makes it easy to calculate U.S. sales tax based on ZIP code, state, and transaction amount—no external APIs required. Built for speed and reliability, it returns accurate estimates with a full tax breakdown, ideal for quotes, invoices, e-commerce carts, and compliance tools.

Designed for consistent, high-frequency use, it delivers clear JSON output with region-specific rates so you can make informed financial decisions in real time.

Key features include:
✅ Estimate tax for any U.S. ZIP using built-in dataset—no internet calls required
✅ Get combined tax rates and full breakdowns (state, county, city, special)
✅ Optimised for e-commerce, invoicing, quoting, and automation workflows
✅ Fast, deterministic results with zero LLM dependency

Avoid tax guesswork and power smarter transactions with Sales Tax Estimator—the fast, local-first way to compute accurate sales tax.

Example prompts to invoke Tool Sales Tax Estimator (U.S. ZIP-Based)

What’s the estimated sales tax on a $250 sale to ZIP 94103 in CA?
Add tax to a $79.99 order being shipped to 78701 in Texas.
Estimate total with tax for $1,200 billed to ZIP 10001, NY.
If I sell a product for $500 to 98101 WA, what’s the tax?
I need the subtotal and tax amount for a $300 sale in ZIP 44101 (OH).
Give me the breakdown of taxes for 48201 in Michigan.

Context

Tools
function sales_tax_estimator

Estimate sales tax for a transaction using U.S. ZIP code data.