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Reverse GST/HST Calculator (Canada)

↻ Updated 2026 tax year

Work backwards from a tax-included total to the pre-tax amount and the GST/HST component, using the 2026 sales-tax rate for your province or territory.

Educational calculators — always consult a licensed professional before making financial decisions.

Your inputs

Total amount (tax included)

Province / territory

Pre-tax amount

$100

from $113 incl. tax

Tax component

$13

13% HST

Combined rate

13%

backed out of the total

Total, split back out

Pre-tax amount$100

Sales tax$13

Breakdown

Tax-inclusive total$113

HST (13%)− $13

Pre-tax amount$100

ASSUMPTIONS — 2026 rates. Works backwards from a GST/HST-inclusive total to the pre-tax price and tax component for Ontario (13% HST). For GST+PST/QST provinces both taxes are assumed to apply to the same pre-tax base (Quebec QST is charged on the pre-tax amount, not on GST). Consult a tax professional for exempt or zero-rated items.

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Sources & rate references

·Retail Council of Canada — sales tax rates by province (2026) — Nova Scotia HST reduced to 14% (Apr 2025)

Rates, brackets and limits here are checked against primary sources. If a number still looks off, email support@realmoneyiq.com and we'll review and fix it.

RealMoneyIQ provides free educational calculators, not financial, tax, investment or legal advice. Results are estimates based on the assumptions you enter and publicly published rates; your actual outcome will differ. Always confirm decisions with a licensed professional who knows your full situation.