Backward calculation only
You know the final ₹ paid—not the pretax base. ₹590 at 18% → ₹590 ÷ 1.18 = ₹500 taxable, ₹90 GST.
Subtracting 18% of ₹590 (₹106.20) is incorrect and understates taxable value.
Reverse GST Calculator
Zomato, contractor invoices, and POS totals hide taxable value. Reverse GST divides your paid amount by (1 + rate) to expose the base for expenses and ITC.
Live GST calculation
Reverse GST Calculator
Remove GST from a tax-inclusive price.
Enter values and GST rate to see your breakdown.
Standard rate
18.00%
Alternative slabs
5% / 12% / 18% / 28%
Combined example
18.00%
Freelancers and D2C sellers
Meesho sellers and consultants use reverse GST to separate revenue from tax before paying GST from collections.
Bangalore freelance developers reverse 18% GST on tax-inclusive client receipts before estimating net income for advance tax planning.
Common backward-calculation errors
Subtracting 18% from ₹1,180 yields ₹967.60—not the correct ₹1,000 taxable value. Always divide by 1.18 on GST-inclusive totals from Swiggy, Zomato, and contractor invoices.
Mixed-slab carts on Amazon.in need per-order rate before reverse calculation—never apply one blended 18% across 5% grocery and 18% electronics rows.
Reverse GST steps
Enter inclusive total and rate → taxable value and GST amount update instantly.
Archive the original invoice PDF showing HSN/SAC, rate, and GSTIN alongside your reverse calculation for ITC audit trails.
Zomato and Swiggy order confirmations often bundle 5% or 18% GST—inclusive totals need rate-matched division before freelancer expense coding.
- Taxable = inclusive ÷ (1 + rate/100).
- Subtracting rate% from gross is incorrect.
- 5% restaurant bills use divisor 1.05, not 1.18.
Common use cases
- Freelancer expense claims.
- Seller net revenue from gross UPI.
- Zomato receipt taxable split.
Tips for accurate calculations
- Divide, never subtract %.
- 5% restaurant bills differ.
- Match invoice date slab.
- IGST same formula.
India tax rate categories
| Rate | Category | Examples |
|---|---|---|
| 28% (Luxury/Sin) | Luxury goods and sin taxes | Cars (mid/large), motorcycles (>350cc), cigarettes, aerated drinks, luxury hotels — often + cess |
| 18% (Standard) | Most goods and services | Electronics, manufactured goods, professional services, AC restaurants, telecom |
| 12% (Reduced) | Selected goods | Processed food, butter, cheese, apparel above ₹1,000, business-class air travel |
| 5% (Lower) | Essentials and basics | Packaged food, apparel up to ₹1,000, footwear up to ₹1,000, economy travel |
| 0% (Nil) | Necessities | Fresh food, milk, eggs, vegetables, bread, educational and healthcare services |
₹590 food tech receipt
18% GST inclusive.
÷ 1.18
Taxable ₹500 | GST ₹90
Record-keeping
Store original invoice showing rate and GSTIN for ITC claims. Never subtract GST percentage from inclusive total—division by (1 + rate) is mandatory on all Indian backward calculations.
Frequently asked questions
Yes — both extract pre-tax value from a GST-inclusive total.
Reverse GST formula
Taxable = Inclusive ÷ (1 + GST%/100)
Example: ₹1,180 at 18% → Taxable ₹1,000, GST ₹180.