You sue to recover money under an agreement both sides signed. The judge declines to look at it. Not because the contract was unfair or the claim was weak, but because the stamp duty was short paid, and an instrument that is not duly stamped is not evidence. The few thousand rupees you saved at signing has just cost you the case, or at least the year it takes to fix.
Stamp duty under the Indian Stamp Act, 1899 and the state stamp laws must be paid before or at the time a document is executed, and an under-stamped instrument is inadmissible in court until the deficient duty plus a penalty of up to ten times that amount is paid.
The bottom line
What it depends on: the type of document and the state where it is executed. Stamp duty is largely a state subject and rates differ across India.
How to pay it: e-stamping through SHCIL at shcilestamp.com, live in around 18 states and union territories, with some states running their own portal instead.
What it is not: registration. Stamping is the tax that makes a document admissible; registration under the Registration Act, 1908 is a separate step, and many documents need both.
What stamp duty is
A tax paid to the government when certain documents are executed, evidencing that the instrument has been legally recorded.
The amount turns on the type of document and the state of execution. Duty may be a fixed amount, as on an affidavit or a simple agreement, or ad valorem — a percentage of the value involved, which is how property and other high-value transactions are charged.
Which documents attract it
- Sale deeds and conveyances of property, which carry the highest duty, usually a percentage of value
- Lease and rent agreements
- Partnership deeds and LLP agreements
- Powers of attorney
- Share transfer instruments
- General business agreements, indemnities and bonds
Why under-stamping is the expensive mistake
Section 35 of the Indian Stamp Act makes an instrument that is not duly stamped inadmissible as evidence. Not void — unenforceable, which in a dispute amounts to the same thing at the moment it matters.
The document can usually be validated later. If a dispute reaches court and the instrument is found insufficiently stamped, the court impounds it and sends it to the Collector of Stamps. The party relying on it pays the deficient duty plus the penalty, which can run up to ten times the deficiency, and only then is the instrument treated as duly stamped.
That is a delay and a bill arriving at the worst possible moment in a case you are already fighting. Correct stamping at the outset is always cheaper.
e-stamping, and how to buy one
Duty was traditionally paid on physical non-judicial stamp paper or by franking. After repeated stamp paper scams most states moved to e-stamping, run by the Stock Holding Corporation of India as the central record-keeping agency, currently live in around 18 states and union territories.
- Go to shcilestamp.com and check your state is covered. Some states route e-stamping through their own portal instead.
- Register as a first-time user with your name, contact details and a password, then log in.
- Open the e-stamping service and enter the transaction — the type of document and the transaction value. The portal calculates the duty payable.
- Pay online by UPI, net banking or card. Some locations also accept payment at an authorised SHCIL collection centre.
- Download the e-stamp certificate. It carries a Unique Identification Number. Print it, attach it to the document, and execute the document on or after the stamp date.
The UIN is also a verification tool. When the other side hands you a stamped document, enter its UIN on the SHCIL portal and confirm the stamp is genuine before you rely on it. Keep proof of payment with the original instrument.
When duty must be paid
Before or at the time of execution, as a rule. Instruments executed outside India can be stamped within three months of first being received in India.
Buying stamp paper after a dispute has arisen and back-dating it is illegal, and it is detected easily — the stamp carries its own date.
Electronic agreements
Contracts signed electronically need stamping too. The medium does not change the duty. Electronic records are recognised under the Information Technology Act, and stamp duty obligations apply to them as they do to paper.
Many states now accept duty on such instruments through their online portals, and an e-stamp certificate can be linked to the agreement. A click-wrap or e-signed business contract deserves the same stamping discipline as one signed in ink.
Who pays
Unless the parties agree otherwise, the law specifies who bears the duty for each type of instrument — the buyer on a conveyance, the lessee on a lease.
Commercial contracts often allocate it by clause instead, and it is worth spelling out not just who pays but who is responsible for ensuring the document is properly stamped and, where required, registered. Those are two different jobs and both get forgotten.
Stamping is not registration
Stamp duty is the tax that makes a document admissible. Registration under the Registration Act, 1908 is the separate process of recording certain documents, such as property sale deeds and long leases, with the sub-registrar.
Many documents need both, in that order: stamp first, then register.
Common mistakes
- Treating stamp duty as a formality on a routine commercial agreement, then discovering Section 35 during a dispute.
- Using the rate from another state. Duty is a state subject and the rates differ.
- Executing the document before the stamp date on the certificate.
- Assuming an e-signed contract is outside the stamp regime.
- Not verifying the UIN on a stamp certificate handed to you by the other side.
- Leaving the stamping obligation unallocated in the contract, so neither party does it.
Frequently asked questions
What happens if my agreement is under-stamped? It is inadmissible as evidence under Section 35 until you pay the deficient duty plus a penalty, which can reach ten times the deficiency. The court impounds the document and sends it to the Collector of Stamps.
Is an under-stamped contract void? No. It is unenforceable until the deficiency and penalty are paid, which in a live dispute has much the same effect.
Can I stamp a document after signing it? Duty is payable before or at the time of execution. Instruments executed outside India may be stamped within three months of first receipt in India.
Do electronic agreements need stamping? Yes. The obligation follows the instrument, not the medium.
How do I check whether an e-stamp is genuine? Enter its Unique Identification Number on the SHCIL portal.
Is stamping the same as registering a document? No. They are separate requirements under separate statutes, and many documents need both.