Free GST Tool
GST Calculator
Add or remove GST from any amount and see the CGST, SGST or IGST split instantly. Free, no login.
- Price before GST
- ₹0.00
- GST (18%)
- ₹0.00
- Total amount
- ₹0.00
CGST + SGST · same-state sale
- CGST (9%)
- ₹0.00
- SGST (9%)
- ₹0.00
Free · No sign-up · CGST/SGST/IGST breakdown
How GST is calculated
Adding GST (price → total)
GST = Price × Rate ÷ 100 Total = Price + GST
₹1,000 at 18% → GST ₹180 → Total ₹1,180
Removing GST (total → base)
Base = Total ÷ (1 + Rate ÷ 100) GST = Total − Base
₹1,180 incl. 18% → Base ₹1,000 → GST ₹180
GST rate slabs (2025)
The GST 2.0 reform (Sept 2025) simplified the structure to mainly three slabs, plus exempt and a 40% sin/luxury slab.
| Rate | Common items |
|---|---|
| 0% | Fresh vegetables, milk, eggs, bread, unbranded rice/wheat/pulses, salt, books, newspapers |
| 5% | Most medicines, packed/branded food, tea, coffee, fertilisers, footwear & apparel up to the price threshold |
| 18% | Most goods & services — electronics, mobiles, cement, paint, soap, shampoo, ACs, hotels, professional services |
| 40% | Sin & luxury goods — tobacco, pan masala, aerated & sugary drinks, and premium/luxury items |
Indicative examples only — confirm the exact rate for your product against the latest CBIC notification.
CGST vs SGST vs IGST
Which tax applies depends on whether the sale crosses a state border. The total GST is the same — only the split differs.
Central GST
Half of the total GST, paid to the Central Government.
Delhi → Delhi at 18% → CGST 9%
State GST
The other half of the total GST, paid to the State Government.
Delhi → Delhi at 18% → SGST 9%
Integrated GST
The full GST rate as a single tax, collected by the Central Government and shared with the destination state.
Delhi → Mumbai at 18% → IGST 18%
Why businesses choose Accountune
How Accountune compares with other billing and accounting tools.
| Feature | Accountune | Tally | Zoho Books | Vyapar |
|---|---|---|---|---|
| GST billing | Yes | Yes | Yes | Yes |
| Inventory management | Yes | Yes | Yes | Yes |
| Cloud based | Yes | No | Yes | Partial |
| Multi-user access | Yes | Limited | Yes | Yes |
| Automatic GST reports | Yes | Yes | Yes | Yes |
| Mobile app | Yes | Limited | Yes | Yes |
| Starting price | ₹799/yr | ₹18,000+ | ₹1,299/yr | ₹1,099/yr |
Competitor pricing and features are indicative and may change. See our full pricing.
Stop calculating GST by hand
A calculator is fine for a one-off. For daily billing, Accountune applies the correct CGST, SGST or IGST automatically on every invoice — based on the product's rate and the place of supply.
- Correct CGST/SGST/IGST split chosen automatically per invoice
- GST rate set once per product — it auto-applies every time
- GSTR-1 and GSTR-3B figures generated from your billing data
- Works in the browser and on Android & iOS — no installation
Frequently asked GST questions
Common questions about GST calculation, rates and compliance for Indian businesses.
- GST basics
What does 18% GST mean — with an example?
On a ₹1,000 product, 18% GST is ₹180, so the total is ₹1,180. For a same-state sale that splits into CGST ₹90 + SGST ₹90; for an interstate sale it is a single IGST of ₹180.
- GST basics
What is the difference between GST-inclusive and GST-exclusive?
Exclusive means GST is not yet in the price and is added on top. Inclusive means GST is already in the price and only needs to be extracted. Use 'Add GST' for exclusive prices and 'Remove GST' for inclusive ones.
- GST basics
Is GST included in the MRP?
Yes. In India the MRP on packaged goods is the final consumer price and already includes GST. Use 'Remove GST' to see the base price and the tax inside it.
- CGST / SGST / IGST
Are CGST and SGST always equal?
Yes. On a same-state sale, CGST and SGST are always exactly half each of the total GST — 18% becomes CGST 9% + SGST 9%.
- CGST / SGST / IGST
What is the difference between interstate and intrastate GST?
Intrastate (same state) attracts CGST + SGST in equal halves. Interstate (different states) attracts a single IGST at the full rate. The total tax is the same either way — only the split differs.
- Rates
What is the GST rate on footwear and apparel?
Both are price-band based: at or below the per-piece/per-pair threshold the lower slab applies, and above it the higher slab. A discount that drops the price below the threshold moves it to the lower slab.
- Rates
What is the GST rate on medicines?
Most retail medicines attract 5%, and a list of lifesaving drugs is exempt. Some medical devices sit higher. Verify the specific product against its HSN code.
- Compliance
When is GST registration required?
Generally when turnover crosses ₹40 lakh for goods or ₹20 lakh for services (lower in special-category states). Interstate supply and e-commerce sales can require registration regardless of turnover.
- Compliance
What is Input Tax Credit (ITC)?
ITC is the GST you paid on purchases, which you set off against the GST you collect on sales. Net GST payable = GST collected − ITC. Your supplier must have filed their GSTR-1 for you to claim it.
- Compliance
What is the penalty for late GST filing?
₹50 per day (₹25 CGST + ₹25 SGST), capped at ₹5,000 per return, plus 18% annual interest on unpaid tax. A nil return is ₹20 per day, capped at ₹500.
- Using Accountune
How do I avoid calculating GST on every invoice?
Use Accountune: set each product's GST rate once, and every invoice computes the GST and the correct CGST/SGST/IGST split automatically — with GSTR reports ready to file.
Also useful for
Industry billing software built on the same GST engine.
This calculator is for quick estimates. GST rates and rules change with GST Council notifications — confirm the correct rate and place-of-supply treatment for your transaction before issuing an invoice or filing. Accountune is not liable for filings made on the basis of this tool.
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