Why is my IRCTC OTP not arriving?

The most common reason is that the OTP is going to the mobile number registered with your Aadhaar, which may be different from the number saved on your IRCTC profile. Network congestion during Tatkal rush, spam filters, and resend cooldowns are the other common causes.

What should I check first if an IRCTC OTP doesn't arrive?

Confirm which mobile number is actually registered with your Aadhaar for authentication purposes — that's where the OTP goes, not necessarily your IRCTC account's saved number.

Is OTP verification mandatory for all IRCTC Tatkal bookings?

Yes, since mid-2025 OTP-based mobile verification is mandatory for Tatkal bookings made online, through agents, and at PRS counters.

Booking Rules

IRCTC OTP Not Received? Common Fixes

Updated 13 October 2026 · 5 min read

OTP delays are painful any time, but during a Tatkal rush every second counts — and since mid-2025, OTP verification is mandatory for Tatkal bookings, which means an OTP that doesn't arrive can cost you the booking entirely. Here's what's usually going wrong and how to fix it fast.

The Most Overlooked Cause: Wrong Mobile Number

This is the fix that resolves the problem most often. IRCTC's Aadhaar-authentication OTP is sent to the mobile number registered with your Aadhaar — not necessarily the mobile number saved on your IRCTC profile. If these two numbers are different, you'll keep waiting for an OTP that's actually landing on a phone you don't have in hand. Check which number your Aadhaar record uses before assuming the system is broken.

Other Common Causes

Network congestion during Tatkal rush — thousands of OTPs get triggered in the same 60-90 seconds nationwide; SMS delivery can lag by 30-60 seconds during that spike.
DND (Do Not Disturb) settings on your number can sometimes block promotional-looking SMS; OTP messages are usually exempt, but carrier misclassification happens occasionally.
SMS-blocking or spam-filter apps on your phone silently filtering it out — check your spam/blocked-messages folder before requesting a resend.
Resending too quickly — most systems enforce a short cooldown (often 30-60 seconds) before a new OTP can be issued; repeated taps on "resend" within that window don't help and can sometimes extend the wait.
Poor signal or airplane mode accidentally left on — an obvious one, but worth a 2-second check before you panic.

What To Do Right Now If It's Not Arriving

Check you're looking at the right phone — the one registered with Aadhaar, not just your IRCTC profile number.
Check your spam/blocked messages folder.
Wait out the cooldown period fully before requesting resend again — don't spam the button.
If on a weak signal, step toward a window or switch Wi-Fi calling on if your carrier supports SMS over Wi-Fi.
As a last resort during a live Tatkal attempt, you likely won't get a second shot that window — but fix the underlying mobile-number mismatch immediately so it doesn't repeat next time.

Prevent It Before Your Next Tatkal Attempt

Don't wait until you're mid-booking to discover a mobile-number mismatch. Complete your Aadhaar linking well in advance and confirm the OTP actually reaches you in a calm test, not during a live Tatkal rush.

Quick FAQ

Why does my Tatkal booking need an OTP at all now? Since mid-2025, Indian Railways made OTP-based mobile verification mandatory for Tatkal bookings — including those through agents and counters — specifically to curb bot-driven and agent-abused bookings.

Can I change which number receives the Aadhaar OTP? Only by updating your registered mobile number through UIDAI's own Aadhaar update process — IRCTC can't redirect it to a different number on its own.

Sort out your Aadhaar/OTP setup today — then use our free 60-day calculator to never miss a booking-opening date again.

Useful tools: IRCTC booking date calculator · Tatkal booking time · advance reservation period (ARP)