GST
Calculator
Add or remove GST from any amount instantly. Shows CGST/SGST split. Supports all rates from 5% to 28%.
Enter the pre-tax amount — we will calculate the tax and total.
Custom: 18%
Total (with GST)
₹1,180
at 18% GST
Base Amount (excl. GST)
₹1,000
Total GST Amount
₹180
CGST (9%)
₹90
SGST / UTGST (9%)
₹90
| Base Amount | ₹1,000 |
| CGST @ 9% | ₹90 |
| SGST @ 9% | ₹90 |
| Total GST | ₹180 |
| Grand Total | ₹1,180 |
Frequently Asked Questions
What is GST?▾
What is the difference between CGST and SGST?▾
How do I remove GST from a total price?▾
Is GST the same as VAT?▾
How GST Works and Calculation Methods
Tax-inclusive and exclusive calculation methods, GST rate comparisons, and invoice systems explained.
GST/Consumption Tax Basic Calculation
GST (Goods and Services Tax) is a value-added tax on goods and services. To calculate tax-inclusive from exclusive: Tax-inclusive = Tax-exclusive × (1 + rate). For example, ¥1,000 + 10% tax = ¥1,100. Reverse calculation (exclusive from inclusive): Tax-exclusive = Tax-inclusive ÷ (1 + rate), so 1,100 ÷ 1.10 = ¥1,000.
Invoice System (Qualified Invoice)
Japan introduced the invoice system in October 2023. Qualified invoice issuer registration numbers (T + 13 digits) are now required, and qualified invoices are needed to claim input tax credits. Freelancers and small businesses need to carefully consider whether registration is necessary.
Items Subject to Reduced Tax Rates
- Food & beverages (8%): All food and beverages except alcohol and dining out
- Newspapers (8%): Subscription newspapers published at least twice weekly
- Others (10%): General goods and services at standard rate
GST/VAT Rates by Country
10% / 8%5/12/18/28%10%5% + 省税19% / 7%20% / 5% / 0%Varies by state9%