What Is Chart Preparation in Indian Railways?
Chart preparation is one of the most critical processes in the Indian Railways reservation system. It refers to the moment when the railway authorities finalize the passenger list for a particular train on a given date. Once the chart is prepared, the booking system locks in all confirmed, RAC, and waitlisted passengers, and any remaining vacant berths become visible. Before charting, the exact berth or seat assigned to a passenger is tentative and can change; after charting, every confirmed passenger receives a definite coach number, berth number, and berth type (lower, middle, upper, side lower, or side upper).
The process is managed by the Passenger Reservation System (PRS), which is the centralized computer network that handles all reserved ticketing across Indian Railways. When you check PNR status after the chart has been prepared, the system returns the final allocation rather than a provisional one. Understanding how and when charting happens is essential for travelers who want to confirm their berth, find vacant seats for current booking, or plan last-minute travel on trains that might still have availability after the chart is drawn.
When Is the Train Chart Prepared?
The timing of chart preparation varies based on the type of train, the originating station, and operational requirements. Indian Railways generally prepares two charts: a first chart (also called the initial chart) and a final or revised chart. The first chart is created several hours before the train departs from its source station, while the final chart is generated closer to departure. Between the two charts, a few waitlisted passengers may get confirmed if other travelers cancel their tickets.
| Train Type | First Chart Timing | Final Chart Timing |
|---|---|---|
| Rajdhani Express | 4 – 6 hours before departure | ~30 minutes before departure |
| Shatabdi Express | 4 hours before departure | ~30 minutes before departure |
| Mail / Express | 4 – 6 hours before departure | ~30 minutes before departure |
| Short Distance / Passenger | 2 – 4 hours before departure | ~15 – 30 minutes before departure |
After the final chart is drawn, no further cancellations or modifications are processed through the regular IRCTC portal. Passengers who wish to cancel after charting must file for a TDR (Ticket Deposit Receipt) refund. Meanwhile, berths freed by no-show passengers may be allotted to RAC or waitlisted travelers by the TTE (Travelling Ticket Examiner) on board.
Understanding Berth Types in Indian Railways
Every reserved coach in Indian Railways has a fixed layout of berths. Knowing the berth types helps you plan your travel better, especially if you need a lower berth for seniors or passengers with mobility needs. Here is a breakdown of all berth types found in Sleeper and AC coaches.
| Berth Type | Position | Best For | Notes |
|---|---|---|---|
| Lower (LB) | Bottom tier, bay side | Seniors, families, passengers with luggage | Doubles as a seat during the day; most in-demand berth |
| Middle (MB) | Middle tier, bay side | Flexible travelers | Folds up during the day; available only in Sleeper & 3AC |
| Upper (UB) | Top tier, bay side | Solo travelers who value privacy | Always available as a bed; limited headroom |
| Side Lower (SL) | Lower tier, passage side | Short journeys, window views | Converts to seat during the day; next to aisle |
| Side Upper (SU) | Upper tier, passage side | Travelers who prefer sleeping early | Narrower than bay-side berths; near the window |
How to Check Vacant Berths After Chart Preparation
Once the chart is prepared for your train, you can use ConfirmYatra's Confirm Berth tool to see exactly which berths are vacant, occupied, or allocated to RAC passengers. Follow these steps:
- Enter your train number in the search box above. You can also search trains between two stations if you do not know the train number.
- Select the journey date for which you want to check berth availability.
- Choose the boarding station from the dropdown. This is important because chart data is station-specific.
- View the berth map— once the chart has been prepared, the tool displays a coach-by-coach, berth-by-berth vacancy map. Green indicates a vacant berth, while occupied berths show the passenger's booking status.
- Book on IRCTC— if you spot a vacant berth, you can proceed to book a current-availability ticket directly on the IRCTC website before the train departs.
You can also cross-reference the vacancy data with the live train status to determine whether the train has left its originating station, giving you a clearer picture of whether last-minute booking is still possible.
What Happens to RAC and Waitlist After Charting?
Many travelers are anxious about their RAC or waitlist status when the chart is about to be prepared. Here is what happens at each stage:
Before the First Chart
All cancellations directly free up berths, and the system automatically promotes RAC passengers to confirmed status and waitlisted passengers to RAC in sequential order. This is the best window for movement up the queue, because online cancellations are still allowed.
Between the First and Final Chart
A limited number of cancellations may still occur (mostly through the 139 helpline or counter cancellations). The revised chart picks up these changes, and a few more RAC or waitlisted passengers may get promoted. If your PNR status still shows RAC after the first chart, there is still a small chance of confirmation in the final chart.
After the Final Chart
No more automatic promotions happen through the system. However, once the train departs, the Travelling Ticket Examiner (TTE) can manually allot vacant berths to RAC passengers on a first-come basis. Waitlisted tickets that are not confirmed after the final chart are automatically cancelled, and a refund is initiated to the original payment method. RAC passengers, on the other hand, are still permitted to travel — two RAC passengers share a single berth (one sits while the other has the option to use the berth when it folds down at night). Once on board, the TTE may upgrade them if no-show vacancies exist.
Coach Types and Berth Layout
Indian Railways offers several classes of travel, each with a distinct berth layout and set of amenities. Understanding these layouts helps you anticipate comfort, charging facilities, and the total number of berths per compartment.
| Class | Berths per Compartment | Layout Description | Charging Points |
|---|---|---|---|
| Sleeper (SL) | 8 berths (6 bay + 2 side) | 3-tier layout with open bays; no air conditioning; curtains optional | 1 – 2 per bay (varies by coach age) |
| Third AC (3AC) | 8 berths (6 bay + 2 side) | 3-tier with AC; curtains or modular partitions in newer LHB coaches | 2 per bay; individual points in Humsafar coaches |
| Second AC (2AC) | 6 berths (4 bay + 2 side) | 2-tier with AC; heavy curtains for privacy; wider berths | 2 per bay; additional point near side berths |
| First AC (1AC) | 4 berths (2 lower + 2 upper) or 2 berths (coupe) | Fully enclosed cabin with lockable door; premium bedding provided | 2 – 3 per cabin including USB in newer rakes |
Tips for Getting a Confirmed Berth
Securing a confirmed berth, especially on popular routes and during festival seasons, can be challenging. Here are practical strategies that improve your chances:
- Book early— Reservation opens 120 days in advance for most trains. Booking on the opening day gives you the best chance of a confirmed lower berth.
- Use Tatkal wisely — If general quota is sold out, the Tatkal quota opens one day before departure at 10:00 AM for AC classes and 11:00 AM for non-AC classes. Have your payment details ready and log in a few minutes early.
- Check alternate routes— If your preferred train is fully booked, use the alternate route finder to discover trains via connecting stations that may still have availability.
- Opt for flexible travel dates— Midweek departures (Tuesday, Wednesday) tend to have higher availability than weekends and holidays.
- Monitor your PNR after booking — If you are on the waitlist, keep tracking your PNR status regularly. Cancellations by other passengers happen throughout the booking window, and your chances of confirmation improve as the departure date approaches.
- Check vacancy after charting— Use the Confirm Berth tool on this page to see if any berths have opened up after chart preparation. Current-availability tickets can be booked right up until departure.
Frequently Used Terms
Indian Railways uses a number of abbreviations and terms that can be confusing for first-time travelers. Here is a quick glossary of the most common ones:
- CNF (Confirmed)— Your berth is confirmed. You have a definite coach and berth number assigned, and your seat is guaranteed on the train.
- RAC (Reservation Against Cancellation)— You are allowed to board the train, but you share a berth with another RAC passenger. If a confirmed passenger cancels or does not board, RAC passengers get promoted to confirmed status.
- WL (Waitlist)— You are in the waiting queue. If enough cancellations happen before chart preparation, your status moves to RAC and eventually to confirmed. Learn more about waitlist confirmation chances.
- Chart— The finalized passenger list for a specific train and date. Once the chart is prepared, berth allocations are locked and vacant berths become visible for current booking.
- Berth— An individual sleeping space in a reserved coach. Each berth is identified by a number and a type (LB, MB, UB, SL, SU).
- Coach Position— The sequential placement of a coach in the train rake. Knowing your coach position helps you stand at the right spot on the platform. You can check this via the live train status tool along with real-time running information.
- TTE (Travelling Ticket Examiner)— The on-board railway official who verifies tickets, allots vacant berths to RAC passengers, and handles on-train ticketing queries.
- PNR (Passenger Name Record)— A unique 10-digit number assigned to every railway reservation. You can check your PNR status online to track your booking from waitlist to confirmed.