Reverse Tax Calculator India
Calculate the original amount from a total bill (Reverse GST) or calculate the amount to bill to get your desired net income (TDS Gross Up).
Updated for Indian GST & TDS rules – 2026
Calculator Type
A bill of ₹ 11,800 includes ₹ 1,800 tax.
Often when you pay a bill, the amount includes GST. To find the actual cost of the service or product before tax, you need to “back-calculate” the GST.
The Formula:
Base Amount = Total Amount / (1 + (GST Rate / 100))
What is “Grossing Up” for TDS?
Freelancers and consultants often face this issue: “I want ₹50,000 in hand, but the client will deduct 10% TDS.” If you bill ₹50,000, you will only receive ₹45,000.
To solve this, you need to Gross Up the amount. This calculates what amount you should bill so that after tax deduction, the remainder matches your desired net income.
For normal deduction calculations, you can also use our TDS Calculator.
Note: For slab-based salary tax calculations, please use our Income Tax Calculator.
The Formula:
Bill Amount = Net Required / (1 – (TDS Rate / 100))
Reverse Tax Calculator for GST & TDS in India
This reverse tax calculator helps Indians remove GST from inclusive prices and calculate TDS gross-up amounts for freelancers, consultants, and businesses. It supports CGST/SGST split, IGST, and invoice-friendly rounding.
Frequently Asked Questions
What is a Reverse Tax Calculator in India?
A reverse tax calculator in India helps you calculate the original amount before tax from a total bill that includes GST or determines the bill amount needed for a desired net income after TDS deduction. It supports both reverse GST calculations and TDS gross-up for freelancers and businesses.
Official GST rules are governed by the Central Board of Indirect Taxes and Customs (CBIC) .
How does a Reverse GST Calculator work?
A reverse GST calculator finds the base price and GST amount from a GST-inclusive total. The formula is: Base Amount = Total Amount / (1 + GST Rate/100). For example, for ₹11,800 at 18% GST: Base = ₹11,800 / 1.18 = ₹10,000; GST = ₹1,800.
How to Remove GST from Amount in India?
To remove GST from amount, enter the total bill and GST rate (e.g., 5%, 12%, 18%, or 28%) into a reverse GST calculator. It shows the pre-tax base amount and GST breakdown (CGST+SGST for intra-state or IGST for inter-state supplies).
What is GST Back Calculation and why do I need it?
GST back calculation (also called reverse GST) determines the original price before tax from an inclusive bill. It’s essential for expense tracking, invoice verification, reimbursement claims, and accounting accuracy.
How to use a Gross Up TDS Calculator in India?
A gross up TDS calculator computes the bill amount needed to receive your desired net income after TDS deduction. Formula: Gross Bill = Net Amount / (1 – TDS Rate/100). For ₹90,000 net at 10% TDS: Bill ₹1,00,000 (TDS ₹10,000).
What are common TDS rates for Gross Up calculations for freelancers?
As of 2026, common rates include: 10% (professional services u/s 194J – standard for freelancers), 2% (technical services), 1-2% (contractors u/s 194C), and 20% (if no PAN). Use custom rate for specific cases.
Can I use this Reverse Tax Calculator India for both GST and TDS?
Yes! Switch modes: “Remove Tax (GST)” for reverse GST calculations, or “Gross Up (TDS)” for billing calculations with optional rounding (nearest rupee or round up).
Is Gross Up TDS Calculator useful for salary or only freelance income?
It’s ideal for freelance/professional fees with flat TDS rates. For salary (u/s 192), TDS uses slab rates, so this provides an approximation only.