Plain-language explainers for the questions our calculators get used for most. No jargon, no long detours — just what you need to invoice and price with confidence.
Longer walkthroughs with formulas, rupee examples and comparison tables.
Multiply the taxable value by the GST rate to add tax; divide the inclusive price by 1 + rate/100 to remove it.
Same-state sale: GST splits equally into CGST and SGST. Different-state sale: the whole rate goes on one IGST line.
A tax invoice needs your GSTIN, a consecutive number, the customer details, HSN/SAC, taxable value and the GST split.
Exclusive: tax is added on top of your price. Inclusive: the price already contains tax, so you divide it back out.
Margin % = (Selling price − Cost) ÷ Selling price × 100 — always measured against revenue, not cost.
Markup is calculated on cost; margin on the selling price. The same rupee profit gives two different percentages.
EMI = P × r × (1+r)^n ÷ ((1+r)^n − 1), where r is the monthly rate and n the number of months.
CTC includes employer PF, gratuity and benefits. Take-home is gross pay minus PF, professional tax and TDS.
Same-state sales split the tax equally into CGST and SGST. Inter-state sales carry the full rate as a single IGST line. The place of supply decides, not where your customer's office is registered.
Try the GST calculatorWhen a price already includes tax, divide by 1 + rate/100 to get the taxable value. On ₹11,800 including 18%, the base is ₹10,000 and GST is ₹1,800.
Remove GST from a priceA 50% markup on cost is only a 33.33% margin on revenue. Quoting one when you meant the other is one of the most common pricing mistakes in retail and trading.
Compare margin and markupFestive offers look harmless until you compare the discounted price against landed cost. Run the offer price through profit and margin before you announce it.
Plan a discountGuidance only — confirm the rate and treatment for your goods or services with your accountant. See our disclaimer.