Math & Calculator
GST Calculator
Calculate GST instantly — add or remove GST with CGST/SGST breakdown
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How to Add 18% GST to a Freelancer Invoice in India
Most Indian freelancers, designers, developers and consultants bill at the 18% slab. Keep the tool on GST Exclusive (Add GST), type your professional fee of 50000, and tap 18%. The result panel shows a base amount of 50,000, CGST of 4,500, SGST of 4,500, total GST of 9,000 and an invoice value of 59,000. That last figure is what the client transfers; the 9,000 is tax you collect on the government's behalf and later pay while filing GSTR-3B. Registration becomes mandatory once service turnover crosses 20 lakh rupees, or 10 lakh in special category states, but plenty of freelancers register earlier because Indian companies prefer vendors who issue a proper GST invoice they can claim credit against.
Removing GST From an Inclusive Price: The Reverse Calculation
Shop bills, marketplace listings and restaurant menu prices in India are usually GST inclusive, meaning the tax is already baked into the number printed on the bill. Switch to GST Inclusive (Remove GST) to work backwards. Enter 1180 at 18% and the tool returns a base value of 1,000, GST of 180, and a 90 plus 90 CGST and SGST split. It applies amount minus (amount times 100 divided by 100 plus rate), which is not the same as taking 18% off the total. A flat 18% of 1,180 would give 212.40 and inflate your figures by more than thirty rupees. Use this mode whenever you need the correct taxable value for your purchase register or input credit claim.
CGST Plus SGST or IGST? What the Split in Your Result Means
The calculator divides the total tax into equal CGST and SGST halves because that is how an intra-state supply works: an 18% invoice raised in Maharashtra for a Maharashtra client becomes 9% CGST plus 9% SGST. When the place of supply sits in another state, a Pune freelancer billing a Bengaluru company for example, you charge one IGST line at the full 18% instead. The rupee value is identical, so the Total GST figure here is exactly your IGST amount; you just print one tax row on the invoice rather than two. In Union Territories without a legislature the SGST half is called UTGST. Always match the split to the customer's state code, not your own registered address.
Which GST Rate to Pick: 3, 5, 12, 18 or 28 Percent
The rate buttons mirror the main GST slabs notified in India. The 3% rate covers gold, silver and jewellery. The 5% rate applies to packaged food staples, small restaurants, economy air tickets and much job work. The 12% band picks up business class travel, processed foods and apparel above the threshold price. The 18% slab is the catch-all and covers almost every professional service, including IT, marketing, design, consulting and freelancing, plus most electronics and stationery. The 28% rate is the demerit slab for luxury cars, aerated drinks, pan masala and tobacco, which often carry an extra compensation cess this tool does not compute. Slabs change after GST Council meetings, so verify your HSN or SAC code before filing returns.
Cross-Checking a Vendor Bill Before You Claim Input Tax Credit
Small business owners can treat this as a quick audit tool. Take any supplier invoice, enter the taxable value in Add GST mode at the rate printed on the bill, then compare the CGST, SGST and total against what the vendor charged. A one or two rupee gap is normal rounding, since results display two decimals, but a difference of hundreds usually means the wrong slab was applied, or the supplier charged tax on the pre-discount value instead of the negotiated price. The same check works on e-commerce settlement reports, courier bills and rent invoices. Because the maths happens locally in your browser and nothing is transmitted, you can run confidential contract values through it during a reconciliation without leaving a data trail.
Frequently Asked Questions
Most freelance services fall in the 18% slab, so on a 50,000 rupee fee you add 9,000 GST and invoice 59,000. Within your own state that is 4,500 CGST plus 4,500 SGST; for a client in another state it becomes a single 9,000 IGST line. Enter 50000 in Add GST mode and tap 18% to confirm.
Switch to GST Inclusive (Remove GST), enter 1180 and select 18%. The base value shown is 1,000 and the GST is 180. The formula used is amount minus (amount times 100 divided by 118), not 18% of the total. Deducting a flat 18% from 1,180 gives 212.40, which overstates your input tax credit and breaks reconciliation.
For most service providers the threshold is 20 lakh rupees of annual turnover, and 10 lakh in special category states; for goods it is generally 40 lakh. Below that, registration stays optional, though inter-state suppliers and sellers on e-commerce marketplaces must register regardless of turnover. Many small businesses register voluntarily so corporate clients can claim input tax credit.
No. The entire calculation runs in your browser with plain JavaScript, so the figures you type are never uploaded, logged or saved to any server or account. Once the page has loaded, the maths keeps working even if your connection drops. There is no sign-up and no usage limit, which helps when you are testing client pricing privately.
It depends on the place of supply. When supplier and customer sit in the same state, the tax splits into equal CGST and SGST halves, which is exactly what this calculator displays. When they are in different states, one IGST line at the full rate applies instead. The rupee total is identical, so read Total GST as your IGST amount.