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TaxJar

Sales tax calculation, nexus monitoring and filing for online sellers.

Visit TaxJar Reviewed Oct 27, 2026

TaxJar calculates sales tax at checkout, monitors economic nexus thresholds across states, and files returns through its AutoFile service. Rates are resolved down to jurisdiction level from product tax codes, marketplace and cart data is aggregated into reports, and an API exposes calculation and order endpoints for custom builds. Exemption certificate storage, a nexus dashboard with alerts, and audit support round out compliance, with CSV import as a fallback for channels that have no direct integration.

Who it is for

Marketplace and DTC sellers who have crossed nexus in several states and need filing handled without an accountant on retainer.

Key features

  • Jurisdiction-level tax calculation API
  • Economic nexus dashboard and alerts
  • AutoFile return preparation and remittance
  • Exemption certificate storage
  • Multi-channel data import and reporting

Where it falls short

AutoFile is credit-based — each plan bundles only a couple of filings a year and additional returns are billed individually — so a seller registered in a dozen states pays per return on top of the subscription, while order-volume banding charges a high-AOV, low-order store for capacity it never uses.

Pricing

Subscriptions are banded by average monthly order volume, with a lower tier for smaller sellers that limits integrations and API throughput. AutoFile credits are bundled per year and additional returns are bought individually, so filing cost scales with the number of registered states rather than with sales. Flex fees allow a temporary move to a higher volume band during a peak month.

Prices move; the tier structure is the part that stays true. Check current pricing on TaxJar.

Alternatives to TaxJar

Frequently asked

How much does TaxJar cost?

TaxJar is paid software. Subscriptions are banded by average monthly order volume, with a lower tier for smaller sellers that limits integrations and API throughput. AutoFile credits are bundled per year and additional returns are bought individually, so filing cost scales with the number of registered states rather than with sales. Flex fees allow a temporary move to a higher volume band during a peak month.

What is TaxJar best for?

Marketplace and DTC sellers who have crossed nexus in several states and need filing handled without an accountant on retainer.

What are the best alternatives to TaxJar?

The closest substitutes we list are Avalara and QuickBooks. They sit in a similar price bracket but make a different trade-off, so read the weaknesses section of each review before switching.

Which platforms does TaxJar run on?

TaxJar is available on Web and API.