When appearing for Central Government skill tests (such as SSC CGL DEST, SSC CHSL Typing Test, and RRB NTPC), candidate qualification is determined by the Maximum Permissible Error Percentage (गलतियों की अधिकतम सीमा).

The Staff Selection Commission (SSC) and Railway Recruitment Boards (RRB) set different mistake relaxation thresholds for Unreserved (UR), OBC, EWS, SC, ST, and PwD (Physically Handicapped) categories.

In this guide, we provide the complete official category-wise error cutoff breakdown, medical exemption rules, and calculation methods for 2026.

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Quick Overview: Category-Wise Mistake Relaxation Chart

Candidate Category	SSC CGL (DEST) Max Error %	SSC CHSL (Typing/DEST) Max Error %	RRB NTPC Max Error %	Required Net Speed
UR (General)	5% (Higher Posts) / 7%	7% Maximum Errors	5% Maximum Errors	35 WPM Eng / 30 WPM Hindi
OBC	7% / 10%	10% Maximum Errors	5% Maximum Errors	35 WPM Eng / 30 WPM Hindi
EWS	7% / 10%	10% Maximum Errors	5% Maximum Errors	35 WPM Eng / 30 WPM Hindi
SC / ST	7% / 10%	10% Maximum Errors	5% Maximum Errors	35 WPM Eng / 30 WPM Hindi
ESM (Ex-Servicemen)	7% / 10%	10% Maximum Errors	5% Maximum Errors	35 WPM Eng / 30 WPM Hindi
PwD / VH / HH / OH	10% / Exemption	10% / Exemption	Exemption Available	Medical Certificate Basis
Evaluation Simulator	Test on Typing Nexus	Full Error Breakdown	Instant Live Score	5-Keystroke Standard

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1. SSC CGL Tier-II DEST Error Cutoff Rules

In SSC CGL, the Data Entry Speed Test (DEST) is conducted for 15 minutes (2000 Key Depressions / ~400 words):

• Standard Qualifying Cutoff (Tax Assistant & General Posts):
  • UR: Up to 5% errors allowed (Max ~100 wrong keystrokes).
  • OBC / EWS: Up to 7% errors allowed (Max ~140 wrong keystrokes).
  • SC / ST / PwD: Up to 10% errors allowed (Max ~200 wrong keystrokes).
• High Cutoff Posts (Executive Assistant, Postal Assistant): SSC periodically enforces a stricter 5% threshold for UR to short-list candidates for higher grade-pay vacancies.

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2. SSC CHSL Typing Skill Test Error Cutoff (LDC / JSA / DEO)

For SSC CHSL Tier-II (10-minute test for 1750 key depressions / 350 words in English or 1500 key depressions in Hindi):

• For LDC / JSA (Lower Division Clerk / Junior Secretariat Assistant):
  • UR (General): Maximum 7% mistakes allowed.
  • OBC, EWS, SC, ST, PwBD, ESM: Maximum 10% mistakes allowed.
• For DEO (Data Entry Operator - 8,000 to 15,000 KDPH Grade):
  • UR: Maximum 5% mistakes allowed.
  • All Reserved Categories: Maximum 7% mistakes allowed.

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3. PwD Typing Test Exemption Rules (Medical Exemption)

Candidates with physical disabilities (Orthopedically Handicapped / Visually Impaired) that permanently prevent them from typing are eligible for Complete Exemption from the Typing Test:

Exemption Eligibility Criteria:

1. Candidate must produce a Medical Certificate from a designated Medical Board / Chief Medical Officer (CMO) / Civil Surgeon.
2. The certificate must explicitly state that the candidate is permanently unfit for typing duties.
3. Candidate must upload / submit this exemption proforma to the regional SSC/RRB office before or on the designated reporting date.
4. Merit Calculation: For exempt candidates, their final merit ranking is computed strictly on their Tier-I / Tier-II written examination scores without typing penalty.

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4. How Error Percentage is Calculated in Exam Software

Error Percentage (%) Formula:
Error Percentage (%) = [(Total Full Mistakes + Half Mistakes × 0.5) / Total Master Words] × 100

• Example: If a 350-word passage was assigned in SSC CHSL and you made 14 Full Mistakes and 8 Half Mistakes:
  • Total Errors = 14 + (8 × 0.5) = 18 Errors
  • Error % = (18 / 350) × 100 = 5.14%
• Result: Since 5.14% < 7%, a UR candidate is QUALIFIED!

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5. Frequently Asked Questions (FAQ)

Q1: What is the maximum mistake percentage allowed for UR category in SSC CHSL typing?
Answer: In SSC CHSL for LDC/JSA posts, the permissible mistake cutoff for General (UR) category is 7%.

Q2: What is the error cutoff for OBC and EWS categories in SSC CGL DEST?
Answer: For OBC and EWS categories in SSC CGL DEST, the permissible error threshold is typically between 7% and 10% depending on post preference.

Q3: Is the typing test marks added to the final merit list in SSC?
Answer: In SSC CGL and CHSL, the typing test is strictly qualifying in nature (Pass/Fail). Its marks are not added to the written score, but passing is mandatory for appointment.

Q4: Can visually impaired or OH candidates get extra time in typing tests?
Answer: Yes, PwD candidates opting for a scribe or taking the test with compensatory time are granted 5 extra minutes (total 15 minutes for a 10-minute test).

Q5: Where can I check if my error percentage is within the official cutoff?
Answer: You can practice full mock tests with automatic category-wise pass/fail evaluation on the Typing Nexus Practice Platform.

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6. Official Practice & Free Mock Tests

Evaluate your error percentage against official SSC & Railway cutoffs:

• Practice SSC CGL & CHSL Mock Tests on Typing Nexus
• Read Gross WPM vs Net WPM Formula Guide

Practice with precision, stay well below the error limit, and secure your government appointment with Typing Nexus!