What happens if my platform's native tax settings and Kintsugi disagree?

Kintsugi remains the system of record for filing on every plan. For the specific reconciliation behavior on your platform, see that integration on help.trykintsugi.com.

Does Kintsugi handle usage-based and subscription billing?

Yes. The calculation engine handles subscriptions, usage-based pricing, credit notes, and tax-inclusive pricing, not just single flat-rate sales.

Can I calculate tax through an API instead of a connected platform?

Yes. Kintsugi's API and SDKs let you call real-time calculation directly from your own checkout, billing, or invoicing flow.

Does Kintsugi calculate use tax too, or just sales tax?

Both. Alongside sales tax, VAT, and GST on what you sell, Kintsugi calculates use tax on what you buy from out-of-state or under-taxed vendors.

Tax calculation with the right rate, every time

Once you're registered, Kintsugi calculates the sales tax, VAT, or GST owed on every transaction: the right rate, the right jurisdiction, and the right product. If you haven't registered yet, start with Registrations.

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Trusted by 7,000+ businesses

Factors to consider

Four inputs behind every tax calculation

Kintsugi combines the transaction’s address, the product’s tax code, where you have nexus, and where you’re registered to calculate the right tax. The same engine handles sales tax, VAT, and GST.

AI Assisted

Not everything is taxable

Kintsugi Intelligence automatically helps you tag your products and services with the correct tax codes, since taxability rules (and rates) vary by category, not just by location. You can review and approve classifications in bulk or individually, including from the mobile app, before they apply to a live calculation.

Modern Selling

For modern billing

Kintsugi's calculation logic is built to handle modern billing, not just a single flat-rate sale.

Subscriptions
Recurring invoices are calculated on the same engine as one-time sales, renewal after renewal.
Usage-based pricing
Metered and consumption billing recalculates as usage totals change, not just at checkout.
Credit notes
Refunds and adjustments net correctly against the original calculation instead of counting as new sales.
Tax-inclusive pricing
Common with VAT- and GST-inclusive pricing outside the US: Kintsugi separates the gross amount into a tax-exclusive base and the calculated tax, rather than adding tax on top of a price that already includes it.

On Every Sale

Real-time on invoices, reconciled where it's platform-native

Kintsugi is the system of record for filing, no matter which platform calculated the number. On invoices, Kintsugi's own engine can calculate the tax in real time, so it provides the number from the start.

Use Tax

Tax calculation runs both ways

Kintsugi also calculates use tax, the liability created when you buy from an out-of-state or under-taxed vendor. Purchases are kept separate from sales totals, and Kintsugi nets the tax owed against whatever the vendor already charged, so you're never shown a negative liability.
Full depth on Use Tax.

Guaranteed

Backed by a real guarantee

“If a calculation we made or a filing error of ours leads to penalties or interest, we pay it.”

That's the Kintsugi Guarantee, and it applies to the calculations this page describes, not just filings.

Your Stack

Calculate tax at checkout, from your stack

Building your own checkout, billing, or invoicing flow instead of using a connected platform? Kintsugi's API and SDKs let you call real-time calculation directly from Stripe, Shopify, Chargebee, or a custom stack, and embed it in days, not weeks.
Full depth on Developers.