Night Duty Allowance (NDA) Calculator Railways
This Night Duty Allowance calculator shows the ceiling-aware hourly NDA formula using basic pay, current DA, eligible night hours, and railway-side planning inputs.
Calculate Night Duty Allowance
Enter basic pay, DA, and eligible night hours to estimate the hourly NDA rate and the final railway night-duty amount for the month.
How it works
How this calculator works
Enter pay and eligible night hours
Use the current basic pay, DA rate, and total qualifying hours from your roster or shift sheet.
Apply the NDA rule
The page uses the hourly formula, applies the basic-pay ceiling where needed, and works out the allowance amount.
Read the allowance result
See the eligible hourly rate, qualifying hours, and estimated night-duty credit together.
Current assumptions
Night Duty Allowance assumptions used here
This page uses the standard NDA hourly model of Basic Pay plus DA divided by 200. It applies the prescribed basic-pay ceiling before calculating the rate, then multiplies that rate by the eligible night hours you enter. Use the result as a rule-based estimate and verify it with your shift record and payroll entry.
Key rule points
Key Night Duty Allowance reference points
The allowance rate should not be worked on a higher basic pay once the ceiling rule applies.
The hourly NDA rate is usually calculated by dividing ceiling-aware Basic Pay plus DA by 200.
The final credit depends on the night-duty hours that your railway payroll accepts as qualifying hours.
Worked scenarios
Common Night Duty Allowance scenarios
| Scenario | Basic used | DA | Eligible hours | Estimated NDA |
|---|---|---|---|---|
| Below ceiling | ₹35,400 | 60% | 48 hrs | ₹13,593.60 |
| Above ceiling | ₹43,600 capped | 60% | 48 hrs | ₹16,742.40 |
| Different eligible-hour total | ₹35,400 | 60% | 32 hrs | ₹9,062.40 |
Eligible hours
Eligible hours vs non-eligible hours
This calculator works only on the hours that your railway payroll treats as eligible night-duty hours. If your roster includes breaks, overlapping duty periods, non-night portions of a shift, or hours that are excluded by local booking rules, those blocks may not count for NDA even though they appear in your total duty time.
That is why two employees with similar basic pay can still see different NDA credits for the month. The hourly rule may be the same, but the final allowance depends on what the shift sheet and payroll office accept as qualifying night-duty hours.
Frequently asked questions
Frequently asked questions
How is Night Duty Allowance (NDA) calculated?
The hourly rate for NDA is (Basic Pay + DA) / 200. This rate is multiplied by the number of night duty hours performed.
Is there a ceiling on basic pay for NDA?
Yes, as per 7th CPC rules, the basic pay for calculating NDA is capped at ₹43,600.
Does more night-duty hours increase the NDA amount?
Yes. The Night Duty Allowance amount rises with the number of eligible night-duty hours because the hourly NDA rate is multiplied by the total qualifying hours.
Is the Night Duty Allowance formula different after the basic-pay ceiling applies?
The formula stays the same, but the calculator uses the capped basic pay instead of the actual higher basic pay once the ceiling applies. That keeps the hourly NDA rate within the prescribed rule limit.
Why is my Night Duty Allowance different from this result?
Your actual NDA can differ if payroll counts fewer eligible hours, excludes non-qualifying shift blocks, applies the basic-pay ceiling differently, or uses a different divisor or booking treatment. Use this page as a rule-based estimate and verify the final figure with your shift sheet and railway payroll entry.
References
References
Use these sources to verify the Night Duty Allowance formula, railway rule context, and nearby salary-planning pages tied to NDA.