For e-commerce brands selling into the US
US sales tax handled in every state. Filings off your plate.
Kintsugi monitors every US state threshold, registers, files and remits. Month-to-month, no transaction fees.
Trusted by 7,000+ businesses · 4.8 Shopify App Store · 4.8 Capterra · G2 Leader, Fall 2026 · SOC 2 Type II
The gap nobody warns you about
Shopify collects the tax. Who files it?
- Shopify calculates and collects US sales tax at checkout. Its own automated filing ends with December 2026 sales, per Shopify's help center. Then you file with each state, or a filing service does.
- The US has no VAT. It has 13,000 sales tax jurisdictions, each with its own rules.
- Most states want you registered once you pass $100K in sales there. Some set it at $500K, and some still count 200 orders.
- Sell through marketplaces too? Marketplaces already withheld and remitted that tax, so brands remit it twice without realizing.
- No US entity does not mean no US tax bill.
The Kintsugi difference
From "wait, we owe there?" to filed and paid.
You approve once a month. Kintsugi does the rest.
- 01Connect in about 5 minutesRead-only sync of your store, billing and payments. No code.
- 02See your live exposure mapEvery US state and 100+ countries, with an alert before a threshold becomes back-taxes.
- 03Register without the paperworkRegistrations are prefilled from your data and ready to submit.
- 04Filed and remitted, every cadenceReturns prepared and filed, tax remitted once you confirm, every decision documented.
- 05AI where it helps, people where it countsProduct classification, address validation and monitoring run on AI, with Vertex's enterprise tax engine inside. Judgment calls stay with Kintsugi's tax team.
- 06One approval a monthReview and approve. No state portals, no spreadsheets, no filing calendar.
From Kintsugi's customers
Results and reviews, in their words.
As published on trykintsugi.com
Cut in sales tax compliance costs, per Kintsugi's homepage.
Of Kintsugi customers needed back filing when they joined.
"Kintsugi is solving multi-state sales tax for us, which is a real headache for a direct-to-consumer brand and every one of them has its own rules for when you owe tax. This means I can put my time back into actually growing the business instead of chasing tax deadlines."
Ahmed Ali, Founder and CEO, Juba Farms (ecommerce, functional food)
"They corrected errors in our past returns, enrolled us quickly and efficiently, filed everything on time, and thoroughly researched any questions or concerns we had. Their customer service is excellent."
Yuki Kinoshita, Co-founder, Plufl (ecommerce, furniture)
Your exposure review
See every state where you're exposed.
Connect your store read-only. In minutes you see every state where you're exposed or approaching a threshold. On the call, the team walks through your exposure and what filing would look like.
Monitor every state threshold · No credit card · Read-only connection
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FAQ
Questions founders ask first.
We sell through Shopify and marketplaces. Isn't the tax handled?
No. Shopify calculates and collects at checkout, and its own automated filing ends with December 2026 sales. Marketplaces remit tax on their own sales; your direct sales are on you, and gross reports can make you double-pay.
We don't have a US entity. Does this still apply to us?
Yes. Economic nexus is about sales into a state, not where your company is registered.
We already have an accountant.
Accountants rarely cover US state-by-state registrations and filings. That is the gap Kintsugi fills.
What does it cost?
Free plan, $0: exposure monitoring across the US and 100+ countries, threshold alerts, no credit card. Starter, $75 per action: registrations, filings, amended returns, in the US and Canada. Scale and Premium are custom flat-rate monthly plans. No onboarding fees, no transaction fees, month-to-month. From trykintsugi.com/pricing.
How is this different from Avalara, Anrok, or a spreadsheet?
You approve once a month. Kintsugi registers, files and remits end to end, with real tax experts on call and flat pricing with no transaction fees.
Is my data safe?
Kintsugi is SOC 2 Type II certified, and monitoring connects read-only.