If you’re preparing for the RRB NTPC Typing Skill Test (CBTST), one of the biggest doubts is:
👉 “Is 5% error allowed or 10%?”
Because retyping is allowed, many candidates think they can make more mistakes. Let’s understand the reality in a simple and practical way.
Basic Details of NTPC Typing Test
Before jumping to errors, here are the core rules:
- ⏱ Duration: 10 minutes
- 🌐 Language:
- English: 300 words minimum
- Hindi: 250 words minimum
- ⚠️ Important:
- You must type the full passage at least once
- Otherwise → Disqualified
- 🔁 Retyping: Allowed
- ⛔ Backspace: Not allowed
👉 (We’ve already explained all rules in detail in our previous blog)
How Mistakes Are Calculated
Mistakes are divided into:
- Full mistakes
- Half mistakes
Final calculation:
- Total Mistakes = Full + (Half / 2)
- Then 5% of typed words is ignored
👉 Final Mistakes = Total Mistakes – (5% of total words typed)
Maximum Error Allowed = 5% (Official Rule)
As per official NTPC rules:
👉 Only 5% of total typed words is ignored as mistakes.
Example:
- You type 400 words
- 5% = 20 mistakes ignored
Then Why Do People Say 10% Error Is Allowed?
This is where retyping changes the game.
When you retype, your total word count increases, which increases the 5% buffer.
Mistakes Allowed with Retyping (Practical View)
| Words Typed | Mistakes Allowed | % Error Allowed |
|---|---|---|
| 300 | 15 | 5.00% |
| 350 | 22.5 | 6.43% |
| 400 | 30 | 7.50% |
| 450 | 37.5 | 8.33% |
| 500 | 45 | 9.00% |
| 550 | 52.5 | 9.55% |
| 600 | 60 | 10.00% |
Real Meaning of This Table
👉 Official rule is still 5% only
👉 But because you type more (using retyping):
- Your total words increase
- Your 5% margin increases
- So you can handle more mistakes
✔ That’s why it feels like 8–10% error is allowed
Typing Speed Formula (Very Important)
WPM = (Total Words Typed – (Final Mistakes × 10)) ÷ Time
Minimum qualifying speed:
- English: 30 WPM
- Hindi: 25 WPM
Biggest Mistake Students Make ❌
Many candidates:
- Try to be too accurate
- Type slowly
- Avoid retyping
👉 Result: Low speed → Fail
Correct Strategy to Qualify ✅
✔ Type as much as possible with maintaining Accuracy
✔ Use retyping smartly
✔ Keep errors under control (not zero)
✔ Focus on Speed + Accuracy balance
👉 Remember:
More words = more mistake buffer = higher chances of passing
How TypingSathi Helps You Crack NTPC Typing
If you practice on normal typing websites, you’re missing the real exam logic.
TypingSathi gives you:
- ✅ Exact NTPC exam environment
- ✅ No backspace practice
- ✅ Retyping feature (same as real exam)
- ✅ Automatic mistake calculation (NTPC formula)
- ✅ Real WPM + Pass/Fail status
Why this matters:
Most students fail because:
- They don’t practice retyping strategy
- They don’t understand error calculation
👉 TypingSathi trains you exactly for this.
Final Conclusion
- ✔ Official error allowed = 5%
- ✔ Retyping increases your effective margin
- ✔ Smart strategy = Type more + control mistakes
👉 If you prepare the right way, NTPC typing is very easy to clear