State guides

State sales tax guides

Last updated Checked monthly

Rates and rules for every state with a sales tax. Each guide covers the state and local rates, what’s taxable, when returns are due and when remote sellers have to register.

Checked by the Sales Tax APIThe same engine Zamp customers use.

State sales tax guides

46states

City rates
4,473in 41 states, from the Zamp API
Rates checked
MonthlyLast checked November 3, 2026
Remote-seller threshold
$100,000in sales a year, in most states
See every state

Every state guide, A to Z

Delaware, Montana, New Hampshire and Oregon have no sales tax; the District of Columbia charges 6%.

Research, reports and guidesZamp’s annual sales tax research, plus guides for SaaS, ecommerce and switching providers.

Sales tax, off your plate.

Zamp registers you where you owe, calculates every order at the customer’s address, files every return and handles notices, with a sales tax team you can call.

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