Pro-Rata Salary Calculator
Pro-Rata Salary Calculator
Salary for a part month — the month you join or leave — on a calendar-day, 30-day or 26-day basis, and a yearly bonus or CTC pro-rated for the months you worked.
Salary for a part month
$45,000 a month, joining on Friday 18 September 2026 (a 30-day month), calendar-day basis
Pro-rata salary for a part month
- S
- the monthly salary
- d
- the days to be paid in the month, counting the joining or last day
- D
- the day basis: the calendar days in that month, 30, or 26 working days
- A, m
- a yearly bonus or CTC, and the months worked in that year
Worked example
$45,000 a month, joining on Friday 18 September 2026 (a 30-day month), calendar-day basis
Days to be paid: 18 to 30 September = 13 days
One day's pay: 45,000 ÷ 30 = $1,500
Pay = 45,000 × 13 ÷ 30 = $19,500
On the 26-day basis: 11 working days (Sundays excluded) × 45,000 ÷ 26 = $19,038
The same part month on each basis (salary 45,000)
| Situation | Calendar days | Fixed 30 days | 26 working days |
|---|---|---|---|
| Join 18 Sept 2026 (13 days, 11 working) | $19,500 | $19,500 | $19,038 |
| Leave 20 Feb 2026 (20 days of 28) | $32,143 | $30,000 | — |
How a part-month salary is worked out
When you join or leave in the middle of a month you are paid for the days you were employed, not the whole month. The arithmetic is one line — the monthly salary divided by a number of days, times the days to be paid — but the divisor varies, and in India three are in common use. The calendar-day basis divides by the days in that month, so a day in February is worth more than a day in July. A fixed 30-day month keeps a day’s pay the same all year. A 26-day month counts working days only, leaving out four weekly offs; it is the divisor the gratuity rules use for monthly-rated employees (see the gratuity calculator), and some employers use it for pay too. No statute fixes one for part-month salary, so your appointment letter, standing orders or HR policy decides — ask HR which one your payroll uses.
The bases can give different answers for the same days. Joining on 18 September 2026 is 13 calendar days, and on a salary of $45,000 both the calendar-day and 30-day bases give $19,500, because September has 30 days. On the 26-day basis you count the 11 working days, which gives $19,038. Leaving on 20 February 2026 is 20 days of 28: $32,143 on calendar days, but $30,000 on a fixed 30 days, since each February day is valued at a thirtieth of the month.
Count both the first and last day: 18 to 30 September is 13 days, not 12. Paid weekly offs and holidays inside your employment count on the calendar-day and 30-day bases; unpaid leave does not. For a yearly figure — a bonus, a variable pay target or your CTC — pro-rating is by months worked: a $60,000 annual bonus for seven months is $35,000. Whether a leaver gets any bonus at all is a policy question the arithmetic cannot answer.
When you leave, the Code on Wages, 2019 requires wages due to be paid within two working days of resignation, removal, dismissal or retrenchment; the full-and-final settlement also settles leave encashment, notice pay (see the notice period buyout calculator) and gratuity. For a day or hourly rate from an annual salary use the salary to hourly calculator. The figures here are gross; tax and PF come off afterwards. This is arithmetic on the figures you enter, not financial advice.
Frequently asked questions
How is salary calculated for a part month?
Monthly salary ÷ the day basis × the days to be paid. The day basis is the calendar days in the month, 30, or 26 working days, as your employer’s policy says.
Is a month taken as 30 or 26 days for salary?
Either, or the actual days in the month; there is no single legal rule for part-month pay. The 26-day month appears in the gratuity formula; payroll follows your contract or HR policy.
How many days do I count if I join on the 18th?
Count the joining day and the last day of the month: in a 30-day month that is 13 days, in a 31-day month 14.
How is a bonus pro-rated for part of the year?
Annual amount × months worked ÷ 12. A $60,000 bonus for seven months is $35,000, if the policy pays leavers or joiners a share at all.
When must my last salary be paid after I resign?
The Code on Wages, 2019 (in force from 21 November 2025) says within two working days of the resignation, removal, dismissal or retrenchment taking effect.
Related calculators
References
- Code on Wages, 2019 (Act 29 of 2019), section 17: wages on a monthly basis are paid before the seventh day of the following month, and wages due on removal, dismissal, retrenchment or resignation “shall be paid within two working days”. In force with the other Labour Codes from 21 November 2025.
- Press Information Bureau, Ministry of Labour & Employment. “Government makes the four Labour Codes effective…”, 21 November 2025: the Code on Wages, the Industrial Relations Code, the Code on Social Security and the Occupational Safety, Health and Working Conditions Code take effect from 21 November 2025, replacing 29 laws.
- Code on Social Security, 2020, section 53 (gratuity), carrying over section 4(2) of the Payment of Gratuity Act, 1972: for a monthly-rated employee, fifteen days’ wages are the monthly rate ÷ 26 × 15 — the best-known statutory use of a 26-day month in India.