Free Sales Tax Software
Which sales tax tools a startup can monitor its US sales tax nexus and calculate tax with for free today, what the free part leaves out, whether a card is needed and what filing or the first paid plan costs, read from each provider's own page.
Free allowances read on each provider's own pages, all checked on or after . Sales tax tools change their free plans from time to time: confirm the terms on the provider's page before you rely on it.
Sales tax tools a startup can use for free today include Kintsugi (Free global nexus monitoring), TaxJar (Free 30-day trial), Numeral (Free nexus monitoring and study), TaxCloud (Free 30-day trial), and Zamp (Free plan with nexus analysis). Each of the 8 free plans below links to the provider's page that states it, with its main limit, its transaction caps, whether a card is needed and what filing or the first paid plan costs.
A startup selling software or products across US states can owe sales tax in a state once its sales there pass that state's threshold, called nexus. Sales tax tools watch your sales against every state's threshold and calculate and file the tax, and several monitor nexus for free.
The headline rarely tells you how far it goes. Free monitoring usually stops at telling you where you owe, with registration and each filing charged separately, and calculation and filing tools often offer only a trial. Each tool below shows what is free, its main limit, its transaction caps, whether a card is needed and what filing or the first paid plan costs, quoted from the provider's own page with the date we read it.
Which tools we picked and the order they appear in are our editorial choices; the terms are the providers'. Some of these providers pay us a referral commission when someone signs up through our link: those links are labeled, and they play no part in which tools are listed or where.
Sales tax tools with free monitoring or a free plan
Track where you owe US sales tax, free, and pay only when you file.
- 1
Kintsugi
Global nexus monitoring at $0, no card
Kintsugi's Free plan includes free global nexus monitoring with no credit card. Registering and filing start on Starter, at $75 per action in the US and Canada.
- Filing or paid plan
- Starter: $75 per action, US and Canada (source: trykintsugi.com)
Start free at KintsugiTerms read on trykintsugi.com on Kintsugi: the free allowance and how to start - 2
Numeral
Nexus study first, pay per filing later
Numeral's Monitoring tier is free: connect your sales channels for a free nexus study. Filings and registrations are paid, at $75 per return and $150 per state.
- Filing or paid plan
- $75 per return, $150 per registration (source: numeral.com)
Start free at NumeralReferral linkTerms read on numeral.com on Numeral: the free allowance and how to start - 3
Zamp
Clarity on exposure from one expert check
Zamp's Free plan gives a one-time nexus analysis and a free API sandbox. Its paid U.S. plan is priced by contacting sales, so no price is published.
- Filing or paid plan
- U.S. plan: priced by sales contact (source: zamp.com)
- 4
Commenda
One free nexus check before a managed service
Commenda starts with one free check. After it, the page describes a managed service for growing global companies.
Sales tax tools with a free trial
Try automated calculation and filing free before you pay.
- 1
TaxJar
Sales tax reports and filing, 30 days to test
TaxJar's free 30-day trial covers its sales tax compliance platform, with no obligation. Its Starter plan is $39 a month, with up to 3 data import integrations.
- What's free
- Free 30-day trial (source: taxjar.com)
- Filing or paid plan
- Starter: $39 a month (source: taxjar.com)
- 2
TaxCloud
Shopify or Stripe sellers testing before paying
TaxCloud's free 30-day trial needs no credit card, but it does not include filing or registration for sales tax licenses. Filing starts at $39 a month.
- What's free
- Free 30-day trial (source: taxcloud.com)
- Payment card
- No credit card needed (source: taxcloud.com)
- Filing or paid plan
- Filing from $39 a month (source: taxcloud.com)
- 3
Avalara AvaTax
Developers building on AvaTax, 90 days, no card
Avalara's AvaTax trial runs for 90 days with no credit card needed. It caps calculations at 5 orders and 5 invoices per minute, with a daily cap of 1,000 total transactions.
Start free at AvalaraTerms read on developer.avalara.com on Avalara AvaTax: the free allowance and how to start - 4
Quaderno
Small sellers testing tax compliance for 7 days
Quaderno's 7-day free trial has no obligation and needs no credit card. Plans cap transactions each month, and Quaderno alerts you as you approach the cap.
- What's free
- 7-day free trial (source: quaderno.io)
- Payment card
- No credit card required (source: quaderno.io)
Also useful for bookkeeping, tax and finance
Referral links, picked for fit and ordered by fit (70%) and what a signup earns us (30%), at no cost to you. They never change this page's ranking.
Compare the top options
How this comparison is built
The list covers sales tax software a founder can use for free today without applying to a program. The order and the "best for" notes are our editorial reading of each tool's terms. Every term comes from the tool's own pricing or help page on the date shown, never from a third-party list; follow each link for the full conditions. Free nexus monitoring with filing charged per return, a cap on transactions, registration and filing kept for paid plans, a short trial can matter more than the headline, so the comparison quotes them wherever the provider states them. Some of these tools pay StartupPerks a referral commission, and their links are labeled as referral links; that decides neither whether nor where a tool appears, and no tool pays for a placement on this page.
Read the full methodologyCommon questions
What is the best free sales tax software?
By the terms each provider states, Kintsugi offers free global nexus monitoring, Numeral free nexus monitoring and a nexus study, Zamp a free plan with a one-time nexus analysis, and Commenda one free nexus check.
How much does sales tax filing cost?
Numeral charges $75 per return and $150 per registration, Kintsugi's Starter plan is $75 per action in the US and Canada, TaxJar's Starter plan is $39 a month, and TaxCloud's filing starts at $39 a month.
Does TaxJar have a free trial?
Yes. TaxJar has a free 30-day trial, and its Starter plan is $39 a month with up to 3 integrations.
Is there a free sales tax API?
Avalara AvaTax has a 90-day free trial with no credit card needed, capped at 1,000 total transactions a day.
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