How do I add GST to a price?

Enter the base price (excluding GST) and select your GST rate. The calculator will show the GST amount and the total price including GST.

How do I remove GST from a price?

Enter the total price (including GST) and select the GST rate. The calculator will show the pre-GST price and the GST amount included.

Can I use a custom GST rate?

Yes, you can enter any custom GST rate percentage to match your specific tax jurisdiction or product category.

Finance

Instantané, privé et gratuit

Calculatrice de TPS.

4 août 2026

Calculez facilement la Taxe sur les Produits et Services (TPS), avec prise en charge des taux standards et de la répartition localisée.

Cette calculatrice n'est pas encore entièrement traduite ; une partie du texte s'affiche en anglais.

Calcul sur l'appareilSans inscription

Saisissez vos valeurs

Les résultats se mettent à jour pendant la saisie.

02 / RÉPONSE

Montant original

Taux TPS

Présets

Résultats

Montant original

1,000.00

Montant TPS

180.00

Montant brut

1,180.00

Répartition

CGST

90.00

SGST

90.00

IGST

180.00

Calculatrices associées

Margin And Sales Tax CalculatorCalculate margin and sales tax from explicit inputs with documented assumptions and instant debounced results.Bill Split CalculatorSplit restaurant bills and expenses with custom shares, tips, and taxes VAT / Sales Tax CalculatorAdd or remove VAT and sales tax from prices with preset rates Roth IRA CalculatorProject tax-free retirement savings growth in a Roth IRA UK Salary CalculatorEstimate UK take-home pay after Income Tax, National Insurance, and student loans India Income Tax CalculatorEstimate Indian income tax under old and new regimes with FY 2024-25 reference deductions

Cite this calculator

Canonical URL: https://mathify.one/fr/finance/gst

Updated 4 août 2026

Cite as: Mathify. (2026). Calculatrice de TPS. https://mathify.one/fr/finance/gst

Use Cases

Retail Pricing

Determine the final selling price by adding GST to your wholesale or cost price, ensuring you cover the tax.

Example: Add 10% GST to a $100 product to get a total of $110.

Invoice Reconciliation

Extract the pre-tax amount from a total invoice to verify charges or claim input tax credits.

Example: Remove 18% GST from a $1,180 invoice to find the base amount of $1,000.

Frequently Asked Questions

How do I add GST to a price?: Enter the base price (excluding GST) and select your GST rate. The calculator will show the GST amount and the total price including GST.
How do I remove GST from a price?: Enter the total price (including GST) and select the GST rate. The calculator will show the pre-GST price and the GST amount included.
Can I use a custom GST rate?: Yes, you can enter any custom GST rate percentage to match your specific tax jurisdiction or product category.

Tips & Common Mistakes

Tips

Always double-check the GST rate for your country or region, as it can vary (e.g., 5%, 10%, 12.5%, 20%).
When adding GST, multiply the base price by (1 + rate/100). For removing, divide the total by (1 + rate/100).
Use the custom rate option for special cases like reduced rates on certain goods or services.
Keep a record of your calculations for accounting and tax filing purposes.

Common Mistakes to Avoid

Confusing the base price with the total price when adding or removing GST, leading to incorrect results.
Using the wrong GST rate, especially when a custom rate is needed for a specific product or service.
Forgetting to round the final amount to the nearest cent, which can cause discrepancies in invoices.

Last updated: August 13, 2026