Pro-Rata Salary Calculator
Pay for a part month on the basis your payroll uses, split by component.
Breakup by component
The same days on each basis
Working days in each month
How this was calculated
About the Pro-Rata Salary Calculator
Work out the salary for part of a month: the month someone joins or leaves, or a month with unpaid leave (loss of pay). Choose the basis your payroll or employment terms use — calendar days, a fixed 30 days, a fixed 26 days, or working days after weekly days off and holidays — and see the amount payable, the day and hour rates, and the split across basic pay, HRA and the other components.
Because the basis can change the result by more than a day’s pay, the calculator also shows the same period on all four bases side by side, and lists the working days in every month of the year for payroll planning.
How to use it
- Choose the month and enter the monthly pay components (or one total).
- Enter the joining date or the last working day if the employee did not work the whole month, and any unpaid leave days.
- Choose the basis: calendar days, 30 days, 26 days or working days.
- For the working-day basis, set the weekly days off and type the holidays; the hours in a day give the hourly rate.
- Read the pay for the month, the component breakup and the four bases compared. Copy the summary or download the CSV, which includes the working days in each month.
Examples
Calendar days: 16 ÷ 31 → ₹25,806.45 30 days: 16 ÷ 30 → ₹26,666.67 26 days: 14 ÷ 26 (Sundays 18 and 25 left out) → ₹26,923.08 Working days (Sat–Sun off, 2 Oct holiday): 11 ÷ 21 → ₹26,190.48
₹50,000 − 2 × ₹1,666.67 = ₹46,666.67
Calendar days: 14 ÷ 28 → ₹25,000 30 days: 14 ÷ 30 → ₹23,333.33
The four bases
- Calendar days: a day is the salary ÷ the days in that month (28 to 31), so a day in February is worth more than a day in October.
- Fixed 30 days: a day is always a 30th of the salary. A full month still pays the full salary; a part month is paid for its calendar days, at most 30.
- Fixed 26 days: a day is a 26th of the salary, treating Sundays as paid days off. A part month is paid for its days other than Sundays, at most 26. Indian law uses 26 days in several places — gratuity is 15 days’ wages worked out as monthly wages ÷ 26 × 15 — but your employment terms decide which basis applies to salary.
- Working days: a day is the salary ÷ the working days in the month, after the weekly days off and holidays you enter; a part month is paid for its working days.
A full month always pays the full monthly salary. Unpaid leave is deducted at the day rate of the basis.
Component breakup and rounding
Each component is prorated in the same proportion as the total. The total is rounded to the paisa (or cent), and the components are rounded so that they add up to exactly that total — the leftover paisa goes to the component that lost most in rounding. Allowances that are not paid for part months (a fixed reimbursement, say) can simply be left out of the components and added back yourself.
Working days in each month
The year table counts, for every month of the calendar year or the Indian financial year (April–March), the calendar days, the weekly days off, the holidays that fall on working days and the working days left — with the day rate on the working-day basis. Weekly-off patterns include Saturday and Sunday, Sunday only, Sunday with the 2nd and 4th Saturdays, and Friday or Friday–Saturday for Gulf weeks. Holidays apply to whichever month they fall in; find dates with the public holidays tool.
Limitations
- Only the days are prorated. Statutory deductions — PF, ESI, professional tax, income tax — are not worked out; the PF & ESI calculator does a month’s contributions.
- Half days of unpaid leave can be entered (1.5); hourly deductions are not handled.
- One month at a time. For a final settlement with notice pay, leave encashment and gratuity, use the full and final settlement calculator.
Privacy
Everything happens in your browser. What you enter or open here is not uploaded or stored by MySmartCoPilot.
Frequently asked questions
How is salary calculated for the month someone joins?
Multiply the monthly salary by the days paid and divide by the basis: for someone joining on 16 October at ₹50,000 a month, 16 ÷ 31 × ₹50,000 = ₹25,806.45 on calendar days, or 16 ÷ 30 × ₹50,000 = ₹26,666.67 on a 30-day basis.
How is loss of pay (LOP) calculated?
The day rate times the unpaid days: on a 30-day basis, ₹50,000 ÷ 30 = ₹1,666.67 a day, so two days of LOP reduce the salary to ₹46,666.67.
Should I divide by 30 or by the days in the month?
It depends on your employment terms or payroll policy; neither is wrong in itself. Dividing by the days in the month makes each day’s value change from month to month; a fixed 30 keeps it the same. The comparison table shows how much the choice changes the result.
Why 26 days?
Many Indian payrolls treat a month as 26 working days with four paid Sundays, so a day’s pay is the monthly salary ÷ 26. The gratuity rule in the Code on Social Security works out 15 days’ wages the same way (monthly wages ÷ 26 × 15).
How many working days are there in a month?
Calendar days minus weekly days off and holidays. October 2026 has 31 days, 9 Saturdays and Sundays and, with 2 October as a holiday, 21 working days. The year table lists every month.