A red light at a toll lane does not yet mean you owe anything. The system has failed to finish the toll, and the reason decides what you pay.
Well, there are three reasons. The reader may miss the tag, the bank may decline the payment, or the plaza's own system may be down.
Drivers lump all three into one complaint, a FASTag not read at toll plaza, yet the answers run from free passage to double the toll. This guide separates the cases, then covers the lane steps, the charges and the refund route for a private car on a National Highway.
But How Does A FASTag Actually Work
A FASTag is a radio-frequency identification (RFID) enabled sticker on the inside of the windscreen. Its chip holds a tag ID linked to one vehicle number and one prepaid wallet or bank account.
As the car moves through the lane at 25 to 30 kmph, with at least 10 metres to the car ahead, the lane reader reads that ID. The plaza's bank, called the acquirer, then asks the National Payments Corporation of India (NPCI) to collect the toll charges from your bank, called the issuer, which debits the wallet.
The lane also checks the tag against an exception list of blacklisted, closed, replaced and low-balance tags.
So Why does FASTag Scanning Fails and How to Prevent It
Six causes sit behind a FASTag not scanning, and you control five of them.
Tag not on the glass: The National Highways Authority of India (NHAI) lists a tag that is not fixed to the windscreen, or is held in the hand, as a violation that can lead to blacklisting.
Wrong place or re-stuck tag: Most if not all bank publish guides on how to place a FASTag for example, Axis Bank's fitting guide says to fix the tag from inside the car at the top middle of the windscreen, behind the rear-view mirror, and never to peel it off, reposition it or add tape.
Blocked signal: ICICI Bank's guide asks you to keep metal surfaces and other stickers away from the tag.
Low balance or blacklist: NHAI lists low balance and a class mismatch among the blacklist reasons, so keep enough in the wallet for the highest toll on your route.
Old tag: Wear and tear can damage a physical tag which is valid for 5 years and may not get scanned well in later years, and a damaged one goes back to the issuer for a replacement.
Faulty plaza equipment: This is the cause outside your control. The plaza must repair a system fault within 7 working days.
What to Do at the Lane for a FASTag Not Read at Toll Plaza
Six steps cover the lane and the follow-up.
Slow down and follow the staff: The barrier can come down once the light is red.
Record the scene: Note the plaza name, lane number and time, and photograph the lane display and the tag on the windscreen. This is our advice, not a rule.
Ask for the handheld reader: Every plaza must keep portable readers as a backup. If one reads and validates the tag, the plaza must let the car pass.
Ask for a receipt if the plaza is at fault: Get the zero-transaction receipt before you leave.
Pay by UPI if the tag is invalid: Keep the payment record.
Follow up: Call the 1033 helpline and check your SMS and issuer app for any debit.
What You Pay When the Tag Fails, From Nothing to Double
Three rules apply to a FASTag not read at toll plaza, and the cause decides which one.
Nothing, when the plaza equipment is at fault
A Gazette notification of May 7, 2018 lets a driver with a valid and funded tag pass free if the plaza's electronic toll equipment malfunctions. The National Electronic Toll Collection (NETC) guidelines require the plaza to issue a zero-transaction receipt.
1.25 times the toll, when the tag is invalid or missing
A car without a valid tag pays 1.25 times the toll by UPI, a rule in force since November 15, 2025. The Press Information Bureau (PIB) says National Highway fees are collected only through FASTag or UPI from April 10, 2026. Older NHAI documents still mention cash, so follow the 2026 rule.
Double, when the tag is not on the car
NHAI has charged a FASTag double toll since July 18, 2024 to a car that enters the lane with a tag not fixed to the windscreen, and the tag can be blacklisted. Holding it up to the reader is therefore a costly shortcut.
And What If I Am Wrongly Charged
Report a FASTag wrong deduction to your issuer within 40 days of the transaction, as the user page of the Indian Highways Management Company Limited (IHMCL), which runs electronic tolling for NHAI, states.
The issuer raises a chargeback, a reversal request sent to the plaza through the banks, which normally takes 20 to 30 working days. If the issuer does not act, write to the IHMCL nodal email: nodal@ihmcl.com
NHAI accepts a plaza that cannot read the tag, and a tag blacklisted without cause, as complaints for 1033. Keep the zero-transaction receipt, the UPI record and your lane photos, because they settle most disputes.
About the Barrier-Free Plazas
NHAI is rolling out barrier-free multi-lane free flow (MLFF) plazas, such as Shahjahanpur in Rajasthan, live since August 1, 2026.
Overhead gantries read the tag and the number plate, so a missed read stops nothing. The registered owner instead receives an e-notice, an electronic demand for the unpaid toll.
Under the national rule, the owner pays the normal fee within 72 hours, and after that the fee doubles. Unpaid dues can also restrict services on VAHAN, the national vehicle registration database.
A Final Word
Before you pay anything at the plaza, work out which failure you have. A plaza fault with a valid, funded tag is free. An invalid tag costs 1.25 times the toll, and a tag held in the hand costs double.
A FASTag not read at toll plaza is rarely a reason to pay on the spot, so photograph the lane, keep every receipt and use the 40-day window.
FAQs
What should I do about a FASTag not read at the toll plaza?
Ask the staff to check it with a handheld reader. If it validates the tag, you pass. Note the plaza, lane and time, photograph the display and call 1033.
What if the FASTag scanner is not working at the lane?
With a valid and funded tag, you pass free under the May 7, 2018 Gazette rule. Ask for a zero-transaction receipt before you leave.
Can I pay cash if my FASTag is not scanning?
No. From April 10, 2026, National Highway fees are collected only through FASTag or UPI. A car without a valid tag pays 1.25 times the toll by UPI.
How long do I have to report a wrong deduction?
You have 40 days from the transaction to report it to your issuer. A chargeback normally takes 20 to 30 working days.
Is the FASTag double toll charged if I hold the tag in my hand?
Yes. NHAI charges double the toll for a tag not fixed to the windscreen, and the tag can be blacklisted.
