Quebec GST + QST Calculator Guide (14.975%)

Quebec Tax Structure: GST + QST

Quebec is unique because the total tax burden is split between:

• GST: 5%
• QST: 9.975%
• Combined total: 14.975%

For quick estimates, use the combined multiplier:

• Add tax: Subtotal × 1.14975
• Remove tax: Total ÷ 1.14975

Practical Calculation Examples

Example 1: Add Quebec taxes

• Subtotal: $800.00
• Combined tax: $119.80
• Tax-in total: $919.80

Example 2: Remove tax from a total

• Total: $1,149.75
• Pre-tax: $1,149.75 ÷ 1.14975 = $1,000.00
• Tax included: $149.75

Filing and Compliance Notes

If you sell into Quebec, you may need both federal and Quebec registrations depending on your business setup and nexus.

You should also review:

• Small Supplier Rule ($30,000)
• GST Number Registration Guide

Related Quebec Resources

• Quebec Tax Special: Understanding GST + QST
• HST vs GST vs PST Comparison

Calculate Quebec GST + QST instantly with our free calculator →

FAQ: Quebec GST/QST

Is Quebec total tax exactly 15%?

No. The combined rate is 14.975%, not 15%.

Can I remove both GST and QST from a total at once?

Yes. Divide the total by 1.14975 for a combined reverse calculation.