How to Reverse Calculate Saskatchewan Sales Tax
To back out the 11% sales tax from any Saskatchewan receipt or invoice, use the standard algebraic reverse formula:
For a total of $100.00 CAD:
- Total Paid: $100.00 CAD
- Pre-Tax Base: $100.00 ÷ 1.1100 = $90.09 CAD
- Total Tax Owed: $100.00 - $90.09 = $9.91 CAD
Breakdown: GST Portion (45% of tax): $4.50 CAD | PST Portion (55% of tax): $5.41 CAD
