Selling Price from Margin Calculator (with GST)
Enter cost price and the margin you want to get the price before GST and the price with GST. For pricing new stock.
Quick answer
₹500 cost, 25% margin, 18% GST: sell at ₹786.67.
How it is calculated
- Price before GST = cost ÷ (1 − margin ÷ 100) = 500 ÷ 0.75 = 666.67.
- Price with GST = that × (1 + GST ÷ 100) = 666.67 × 1.18.
- Adding 25% to cost (625) gives only a 20% margin, not 25%.
Worked example
An item costs ₹500, you want a 25% margin and GST is 18%. Price before GST is ₹666.67; charge ₹786.67 with GST.
| Cost price | ₹500 |
| Margin you want | 25 % |
| GST | 18 % |
| Price with GST | ₹786.67 |
| Price before GST | ₹666.67 |
Formula
pb = Cp/(1-Mg/100) Price with GST = pb×(1+Gr/100) Price before GST = pb
Good to know
- If you get input credit for GST paid on purchase, enter the cost without GST.
- Round to an easy figure like ₹789 or ₹799.
Questions people ask
How do I price for a target margin?
Cost ÷ (1 − margin%). For 25%, divide by 0.75.
Why is adding 25% to cost not enough?
That gives only a 20% margin on the sale.
What if there is no GST?
Set the GST rate to 0.
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Updated 13 Nov 2026 · Desktop N Calculator v1.2.0