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Published on:

December 26, 2025

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Understanding the Essential FASTag Rules

Indian highways are developing rapidly, and toll collection has also become digital. After the introduction of FASTag, long queues, cash hassles, and unnecessary stoppages at toll plazas have reduced considerably. From 2021, FASTag is compulsory for all four-wheelers, but there are many drivers who do not have clarity about the rules, penalties, and usage. Due to this, they are mistakenly charged extra fees.

What Is FASTag?

FASTag is a digital toll payment system that works on Radio Frequency Identification (RFID) technology. This is a small sticker that is pasted on the vehicle's windshield. When the vehicle passes through the toll plaza, the scanner reads the tag, and the toll amount is automatically deducted from the FASTag wallet or linked bank account.

In simple words:

No cash is required

Manual stops are reduced

Travel becomes smoother

Charges are automatically deducted

Why Is FASTag Mandatory In India?

The government made FASTag mandatory because;

Low crowding in toll plazas

Reduces cash handling and fraud cases

Traffic flows smoothly on national highways

Saves both fuel and time

Digital payments can be promoted

If a FASTag is inactive, non-affixed, or unavailable, there are chances of paying a higher toll at the plaza. That's why it is important to maintain a valid FASTag.

How FASTag Works?

The working process of FASTag is very simple:

The FASTag is affixed in the correct position on the windshield.

The toll plaza scanner reads your tag

The system vehicle verifies the class

Toll amounts are automatically deducted from a linked account.

You receive SMS notification (deduction and balance info)

This whole process is completed in seconds, making highway travel fast and hassle-free.

FASTag Rules Every Vehicle Owner Must Know

FASTag has become a mandatory system for smooth travel at toll plazas. Its rule structure will remain the same in 2025, but NHAI has stated that it is necessary to follow some strict guidelines for transparency and misuse control. When you do not use FASTag correctly, you may face erroneous deductions on toll fees, tax rejections, or double toll issues.

FASTag Is Mandatory For All Four-Wheelers:

After 2019, FASTag became gradually mandatory in India, and from 2021, this is permanent. Also in 2025:

FASTag is compulsory for all four-wheelers

No matter whether the vehicle is new or old, commercial or private

Minimum Balance Rule:

Every FASTag provider (bank / wallet) has a minimum balance requirement. If the balance below this limits:

Tags na be temporarily blacklisted on low balance

Deduction may fail at plazas

You will have to pay cash or face double tolls

One FASTag One Vehicle Rule:

NHAI rules for 2025:

Only one FASTag can active on one vehicle registration number

It is illegal to use one vehicle FASTag on another vehicle

Fixing two FASTags on one vehicle is also not allowed

KYC Rule:

According to the RBI and National Highway Authority Of India (NHAI) rules, it is mandatory for FASTag users to update their KYC.

‍Required Documents

Aadhaar

Vehicle RC

Mobile Number

Address Proof

‍On Incomplete KYC

Apply recharge limits

Tag can be made inactive and frozen at any time

Blacklisted or Inactive FASTag Rule:

FASTags rules can be blacklisted if:

Balance is low

KYC is incomplete

The chip is damaged

The wrong vehicle class is detected

The provider flags suspicion of misuse

Double Toll Rule (NHAI Standard):

Toll penalties apply when;

The FASTag is inactive

The tag is not scanned

The chip is damaged

FASTag is not in the vehicle

The tag is blacklisted

Recharge Options:

Google Pay

PhonePe

Paytm

MyFASTag App

Bank App

Net Banking

UPI

Fastag Rules Summary Table

Rules	Descriptions	Notes
FASTag mandatory	FASTag is important for all four-wheelers vehicles	Without FASTag double toll
Minimum Balance	It is important to maintain the threshold balance for active tag	NHAI removed the minimum balance requirement but for safety maintained a balance of Rs 200 - Rs 300.
One FASTag on vehicle	Only one FASTag is valid for one vehicle	It is not allowed to use same tag on another vehicle
KYC requirement	Must valid KYC update	Incomplete KYC, it means you have to face recharge limit and tag inactive risk
Blacklisted / Inactive tag	Low balance, incomplete KYC, damage, and misuse suspicion can blacklist a tag	Double toll on toll plaza
Correct vehicle class	It should update the correct tag on class (Car / Jeep / Truck)	Wrong class, means extra deduction or scanner rejection
Recharge rule	Allowed recharge from UPI, Wallet, and Bank	Wrong recharge: Refund depends on issuer policy
Tag placement rule	FASTag should fixed on the front windshield (top center or slightly right) for proper scanning	Wrong placement, scanner will not read properly

How To Avoid FASTag Errors At Toll Plazas

There are five points that you should learn:

1 Fix the FASTag in correct place:

The top of the windshield or the little right side is the best option for fixing FASTag. The scanner reads easily from this side.

2 Do not fold, scratch or laminate the tag:

FASTag is an RFID-based sticker. Due to lamination or creases, the chip signal becomes weak.

3 Maintain Minimum Balance For Safety:

NHAI has removed the minimum balance requirement. Users can maintain Rs 200 - Rs 300 for safety. Tag may be temporarily inactive on low balance as per issuer policy only.

4 Update correct vehicle class:

If the vehicle is a car but another class is selected in the tag, then either the toll will be higher or the tag will be rejected.

5 Replace the tag if it's damaged:

There are chances of damaging a chip due to heat, sunlight or rough cleaning. In that situation, a new tag is the best option.

Conclusion

FASTag has made the Indian toll system modern and efficient. However, if you want to truly benefit, knowing the correct way is very important, such as fixing it in the correct position, completing KYC , maintaining the balance, and replacing damaged tags in a timely manner. If you follow these basic rules, then you are safe from issues such as , double charges at tolls, scan failures, or long queues.

FAQ

1 What should I take if my FASTag fails to scan at the toll plaza ?

If your FASTag is not scanned, then first check the condition and position of the tag. Sometimes, dust, scratches or heat can damage the tag . If the tag still doesn't scan, toll staff may refer you to a manual toll check, and you will be charged double toll. To avoid these cases, it's best to get a replacement tag.

2 Am I able to move my FASTag to a new vehicle?

No, a FASTag cannot be transferred to another vehicle. Every FASTag is linked to a specific vehicle number. If you sell your car, then it's important to deactivate the old FASTag. Always apply for a new FASTag for new vehicles. It's a safer option.

3 What causes toll fees to be applied when FASTag is not active ?

Double toll is an NHAI penalty. If FASTag is inactive, blacklisted, has a zero balance, or unreadable, then the toll plaza directs you to the cash and charges double the amount. The purpose of this rule is to prevent misuse and encourage everyone to use FASTag.

4 How can I check my FASTag balance?

Checking your FASTag balance is easy. You can check instantly from your bank app, MyFASTag app, or PhonePe, or via SMS. Whenever the toll deductions occur , you will receive a message regarding the deductions immediately.

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