What Is GST (Goods and Services Tax)?

Direct vs indirect tax

Income tax is a direct tax — you pay it on what you earn, and you file the return. GST is an indirect tax — it is collected by the seller on what you buy and passed on to the government. As a consumer you never file GST; you simply see it as a line (or two) on invoices, and it is already inside the "MRP" of packaged goods.

One tax, two halves

For a sale within a state, the GST charged is split equally into CGST (to the Central Government) and SGST (to the State Government; UTGST in a Union Territory). For a sale from one state to another, a single IGST is charged and later apportioned between the centre and the destination state. This is why a restaurant bill in your own city shows two lines (for example CGST 2.5% + SGST 2.5%) while an online order shipped from another state shows one line (IGST 5%). The total rate is the same either way.

Reading GST on a bill: a ₹ example

Two conventions appear on Indian invoices, and mixing them up is the most common GST arithmetic error.

Exclusive pricing — the price is quoted before tax and GST is added:

Formula: Total = Base × (1 + rate) → 2,000 × 1.18 = 2,360.

Inclusive pricing — one all-in number is quoted and the tax is inside it. If a service is billed at ₹1,180 "inclusive of 18% GST", the base is not ₹1,180 − 18% = ₹967.60. The correct split is:

Base = Total ÷ (1 + rate) → 1,180 ÷ 1.18 = ₹1,000, so GST = ₹180.

Subtracting 18% of the inclusive price instead would understate the base and overstate the tax by about ₹32 on this bill. Check which convention a quote uses before comparing two prices.

How input tax credit works

At each stage of a supply chain a business charges GST on its sales and pays GST on its purchases. It remits only the difference, claiming credit for tax already paid on inputs. A simple two-step chain at 18%:

The government receives ₹2,700 in total — exactly 18% of the ₹15,000 you paid — and no stage pays tax on tax. You, the final consumer, bear the whole amount; the businesses in between are collection points.

Which rate applies?

GST rates vary by the classification of the good or service, as decided by the GST Council. Following the 56th GST Council changes effective from 22 September 2025, many goods and services are concentrated around the 5% (merit) and 18% (standard) rates, with a special 40% rate for a short list of de-merit goods and services — while nil-rated, exempt, special-rate and product-specific treatments still apply (PIB release, Ministry of Finance). The headline structure therefore does not tell you the rate on a specific item. For that, look at the HSN (goods) or SAC (services) code printed on your invoice and check the current notified rate on the GST portal or CBIC. Classifications and rates change by Council decision, so a rate you remember from an old bill may no longer apply.

Where GST touches personal finance

• Loan charges. The interest on a loan is not subject to GST, but processing fees, foreclosure or prepayment charges and bounce charges are services and attract GST at the applicable rate. If a lender quotes a ₹5,000 processing fee and GST applies at 18%, you pay ₹5,900 — ask whether a quoted fee is inclusive. The EMI calculator shows interest only; add such fees separately when comparing offers (see how loan interest works).
• Insurance. The same 56th Council meeting exempted premiums on all individual life insurance (term, ULIP, endowment) and all individual health insurance policies, including family floaters and senior-citizen policies, from GST (PIB release). Other insurance, such as motor cover, continues to attract GST — check the premium receipt.
• Investing. Brokerage, fund-house expense ratios and advisory fees include GST on the service component. Bank interest, FD interest and mutual-fund returns themselves are outside GST (they are dealt with by income tax — see what is TDS).

Common misunderstandings

• "GST is deducted from my salary." No. GST applies to goods and services you buy; income is taxed under income tax and TDS. The two systems do not overlap.
• "The shop keeps the GST." A registered seller must deposit the GST it collects (net of input credit) with the government; the GSTIN printed on the bill lets you verify the seller is registered on the GST portal.
• "MRP plus GST." The Maximum Retail Price on packaged goods already includes GST; a seller cannot add GST on top of MRP.
• "18% off the inclusive price gives the base." As shown above, divide by 1.18 — do not subtract 18%.

Limitations of this guide

This page explains GST from a consumer's point of view. It does not cover registration thresholds, return filing, composition schemes, reverse charge, e-invoicing or input-credit rules for businesses, and it does not list item-wise rates, which are long and change frequently. Rates quoted here are from the official sources linked above as of October 2026; confirm the current rate for any specific item before relying on it.

Frequently asked questions

Can I claim back the GST I paid as a consumer?

No. Input tax credit is available only to GST-registered businesses on purchases used for their business. A salaried individual cannot claim GST paid on personal purchases in an income-tax return either.

Why does my restaurant bill show CGST and SGST but my online order shows IGST?

The restaurant and you are in the same state, so the tax is split between the centre and that state. The online seller shipped from another state, so a single integrated tax (IGST) is charged and shared later. The total rate is the same.

Is GST charged on the interest part of my EMI?

No. Interest on loans is exempt from GST. Fees and charges around the loan — processing, prepayment, late payment — are taxable services.

Does GST apply to my PPF, FD or mutual fund returns?

No. Returns on deposits and investments are not a "supply" of goods or services, so no GST applies. They may be taxed under income tax instead, and an FD may suffer TDS — see how FD and RD interest is taxed.

How can I check whether a seller is genuinely charging GST?

Every registered seller has a 15-character GSTIN that must appear on a tax invoice. You can enter it in the "Search Taxpayer" tool on the GST portal to confirm it is active. A bill without a GSTIN that still adds "GST" is a red flag.