RRB Normalization Method & Formula 2026 Out for Group D, ALP, NTPC, & Other Railway Exams

The Ministry of Railways, Government of India, has officially released a detailed notice regarding the Normalisation Methodology for Computer-Based Tests (CBT) conducted by Railway Recruitment Boards (RRBs). The normalisation process will apply to all Centralised Employment Notices (CENs) for recruitment to various posts under the 7th CPC Pay Matrix.

RRB Normalization Method & Formula 2026 Out

As per the latest update, RRB will opt for the Percentile Score method to normalise candidates’ scores across different shifts. The notice released explains how raw marks will be converted into percentile scores and normalised marks to ensure fairness in exams conducted in multiple shifts.

What is a Percentile Score?

Percentile scores reflect the relative performance of candidates in a particular shift. The percentile score will serve as the RRB Score (RRC Score for Level-1 exam) and will be used for merit preparation.

1. The marks are converted into a scale ranging from 0 to 100.
2. The topper of each shift will receive a percentile score of 100.
3. The percentile score is not the same as the percentage of marks.

Percentile Formula

Tie-Breaking Criteria

Percentile scores will be calculated up to 5 decimal places to reduce tie cases. In case two or more candidates secure the same percentile score:

1. An older candidate will be placed higher in merit.
2. If age is also the same, alphabetical order (A to Z) of the name will be considered

Minimum Qualifying Marks

Only those meeting the qualifying criteria will be considered for further processing. Candidates must secure the minimum qualifying percentage to be included in the merit list:

Calculation of Normalized Marks

If a candidate’s percentile score is found in the Base Shift, the corresponding normalised marks are directly taken. Normalized marks will be used to determine eligibility for minimum qualifying marks and weightage (including CCAA weightage for Level-1 exam).

RRB Normalization Method and Formula PDF

The normalisation, percentile, minimum qualifying marks and tie-breaking policy have been explained and released through a PDF. Download the official pdf from here and check all details carefully.

RRB Normalization Method and Formula Released For All RRB Exams- Download PDF

Detailed Step-by-Step RRB Normalization Process

The Railway Recruitment Board (RRB) conducts exams in multiple shifts across different days. Since the difficulty level of each shift may vary, RRB uses a normalization method to ensure fairness in evaluating candidates’ performance. Below is a step-by-step explanation of how the RRB normalization process works:

Step 1: Calculation of Raw Marks

First, the candidate’s raw score is calculated based on:

• Total correct answers
• Negative marking (usually 1/3rd mark deducted for each wrong answer)

Raw Marks = (Number of Correct Answers × Marks per Question) – Negative Marks

This raw score is calculated separately for each candidate before applying normalization.

Step 2: Determining Shift-wise Statistics

Since the exam is conducted in multiple shifts, RRB calculates the following for each shift:

• Mean (Average) marks of the shift
• Standard Deviation (SD) of the shift
• Total number of candidates in that shift

These statistical values help measure the overall difficulty level of a particular session.

• A lower mean indicates a tougher shift.
• A higher mean suggests an easier shift.

Step 3: Identifying the Base Shift

RRB selects a base shift for normalization.

• The base shift is generally the shift with the highest mean marks, assuming it to be the relatively easiest session.
• All other shifts are then adjusted in comparison to this base shift.

Step 4: Applying the RRB Normalization Formula

RRB uses a statistical formula to convert raw marks into normalized marks. This formula adjusts the marks of candidates from tougher or easier shifts to bring everyone onto a common scale.

Step 5: Rounding Off Normalized Marks

After calculation, normalized marks are:

• Rounded off up to two decimal places
• Used for preparing the merit list
• Considered final for shortlisting and cut-off determination

Step 6: Preparation of Merit List

Once normalization is complete:

• Candidates are ranked based on normalized marks, not raw marks.
• Category-wise cut-offs are prepared.
• Tie-breaking rules (age preference, alphabetical order, etc.) are applied if required.