US sales-tax rates

State rate and, where the state's revenue department publishes an open ZIP-keyed file (OH, WA on 2026-10-24), the combined state + local rate averaged across the jurisdictions in the ZIP with its minimum and maximum. coverage says what you got: zip_average, state_only (state rate plus the statewide population-weighted average and maximum local rates, from the dated 51-row table), or none (unknown prefix, territory, military mail). Address-level jurisdiction assignment is not offered. Table verified 2026-10-24; next review 2027-01-15.

Published 2026-10-24

About the coverage

State rates for the 50 states and DC from a dated table (verified 2026-10-24, next review 2027-01-15); ZIP-level combined averages for OH and WA from the revenue departments’ own files. Address-level jurisdiction assignment is not offered: it needs licensed boundary data. The per-state coverage table is on the "US sales-tax rates by ZIP" page.

GET/us/sales-tax

US sales-tax rate for a ZIP code

Tiers: anonymousfreecreditsplan
Cost: 1 call

Parameters

Name	In	Type	Description
zip*	query	string	Five-digit ZIP; ZIP+4 accepted, the +4 is ignored.Example: 98101

Request

curl

curl "https://veriport.io/api/v1/us/sales-tax?zip=98101"

Response 200

The lookup, with its coverage.

Field	Type	Description
zip*	string
state	string \| null
stateName	string \| null
coverage*	"zip_average" \| "state_only" \| "none"
stateRate	number \| null	Percent. CA, UT and VA include their mandatory statewide local add-on (source convention, said in `notes`).
combined	object \| null	With `zip_average`: the combined rate across the ZIP.
combined.average	number
combined.min	number
combined.max	number
combined.jurisdictions	integer
combined.period	string
combined.fetchedOn	string (date)
combined.method	string
statewide	object \| null	With `state_only`: statewide figures to estimate with.
statewide.averageLocalRate	number \| null
statewide.maxLocalRate	number
statewide.averageCombinedRate	number \| null
statewide.localRates	boolean
verifiedOn*	string (date)
nextReview	string (date)
sources*	object[]
notes*	string[]

200 OK · application/json

{
  "zip": "98101",
  "state": "WA",
  "stateName": "Washington",
  "coverage": "zip_average",
  "stateRate": 6.5,
  "combined": {
    "average": 10.55,
    "min": 10.55,
    "max": 10.55,
    "jurisdictions": 1,
    "period": "2026Q4",
    "fetchedOn": "2026-10-24",
    "method": "Average of the combined rates of the ZIP+4 ranges in the ZIP, weighted by range width; min and max over those ranges."
  },
  "statewide": null,
  "verifiedOn": "2026-10-24",
  "nextReview": "2027-01-15",
  "sources": [
    {
      "title": "Washington State Department of Revenue — downloadable database",
      "url": "https://dor.wa.gov/taxes-rates/sales-use-tax-rates/downloadable-database",
      "consulted": "2026-10-24"
    }
  ],
  "notes": [
    "Address-level jurisdiction assignment is not offered: a ZIP is a postal route, not a tax boundary."
  ]
}

Headers: RateLimit-Limit, RateLimit-Remaining, RateLimit-Reset, RateLimit-Policy, X-Quota-Remaining, X-Tier.

Errors

400invalid_parameter — A parameter is missing or malformed.
401unauthorized — The API key is missing, unknown or revoked.
402quota_exceeded — Monthly allowance and credits are used up.
429rate_limited — Too many requests per second.

Sources

State and Local Sales Tax Rates, Midyear 2026 — state rates, population-weighted average local rates, maximum local rates (sources: Sales Tax Clearinghouse, state revenue departments) — Tax Foundation, consulted 2026-10-24. Used for the 51 state rows (state rate, average local rate). The Tax Foundation folds the mandatory statewide local add-ons of California (1.25 %), Utah (1.25 %) and Virginia (1 %) into the state rate; the table keeps that convention and says so per row.
Washington State Department of Revenue — Sales & use tax rates, downloadable database (quarterly rate and ZIP+4 files) — Washington State Department of Revenue, consulted 2026-10-24. File Zip4Q426C.zip (Q4 2026, 1 Oct – 31 Dec 2026) read on 2026-10-24: 167,832 ZIP+4 ranges aggregated to 715 ZIPs.
Ohio Department of Taxation — The Finder, file downloads: Ohio County Rate Table by Zip Code (CSV) — Ohio Department of Taxation, consulted 2026-10-24. CountySalesTaxRateReport.csv read on 2026-10-24: 2,130 ZIP/county rows, 1,393 ZIPs; a ZIP crossing counties lists one row per county.