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US/CA Sales Tax Auditor
US & Canada Sales Tax Nexus / GST-HST Auditor
Aggregate transactions by Region (US state or Canadian province) to flag Wayfair economic-nexus threshold breaches, and audit charged tax against the correct Canadian GST/HST/PST rate.
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CSV with Region, Amount, and optional TaxCharged columns
US thresholds cover major states as a reference snapshot — states revise these regularly, verify against each state Department of Revenue before registering or de-registering.
AboutUS/CA Sales Tax Auditor
Aggregate transactions by US state or Canadian province to flag post-Wayfair economic nexus threshold breaches, and audit charged tax against the correct Canadian GST/HST/PST rate.Category: Fiscal ComplianceFinding which states now require sales tax registrationAuditing whether the correct HST rate was charged per provinceFlagging the Canadian GST small-supplier threshold
The US/CA Sales Tax Auditor tool is compatible with:US Multi-State SellersCanadian GST/HST Registrants. This tool alone can help you manage and analyze your data effectively. However, a composed workflow using EU VAT COMPLIANCE, INDIA GST COMPLIANCE may provide even more powerful data processing capabilities. Consider exploring these related tools for a comprehensive data solution.Since the 2018 South Dakota v. Wayfair ruling, US sales tax registration obligations are no longer about having a physical presence in a state — they kick in automatically once your revenue or transaction count in that state crosses a threshold the state itself sets, and nobody notifies you when that happens. This tool takes a transaction export, groups it by region, and for US states compares cumulative revenue and transaction count against each state's published nexus threshold, flagging exactly which states you've likely triggered a registration obligation in. For Canadian provinces it does something different but related: it checks whether the tax you actually charged matches what the correct GST, HST or PST rate for that province should have produced, catching cases where the wrong rate was applied at checkout — Ontario's 13% HST charged as if it were Alberta's 5% GST, for instance — and separately flags when revenue crosses the $30,000 GST small-supplier threshold. Both checks exist because these obligations accumulate silently in the background of normal sales activity, and the practical cost of missing one is back taxes and penalties discovered much later, not a graceful warning at the time.
Frequently Asked Questions:
How do US nexus thresholds work?
Since the Wayfair ruling, crossing a state's revenue or transaction-count threshold creates a tax registration obligation automatically, with no notification from the state.
Are the US thresholds always current?
They're a reference snapshot covering major states, states revise these periodically, so verify against the state's Department of Revenue before registering.
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