Sales Tax & Reverse VAT Calculator
Calculate sales tax additions or reverse-engineer net base and tax amounts from total receipts.
How Reverse Tax Works
To extract sales tax from a gross receipt, you don't simply multiply the total by the tax rate. Instead, divide the gross amount by 1 + (Rate / 100). For a 10% rate on $110: $110 ÷ 1.10 = $100 net base.
Expense Claims & Auditing
Essential for freelancers and small businesses preparing quarterly BAS, GST, or VAT returns where vendor invoices display only the gross card total.
Frequently Asked Questions
Is the Sales Tax & Reverse VAT Calculator free to use?▼
Yes, Sales Tax & Reverse VAT Calculator on SwiftKit is 100% free with no account creation, subscriptions, or usage caps.
Does Sales Tax & Reverse VAT Calculator store or transmit my data?▼
No. All calculations, formatting, and operations execute locally inside your browser memory. No data is sent to external servers.
Does Sales Tax & Reverse VAT Calculator work offline?▼
Yes. Once the page is loaded in your browser, all processing happens client-side without ongoing network calls.