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Salary calculator: a month’s pay from days off and advances
A day of pay is the monthly salary divided by the days in that month. ₹15,000 is ₹500 a day in a 30-day month, ₹483.87 in a 31-day month and ₹535.71 in a 28-day February. Days off beyond what you allow — the weekly offs the month holds plus any paid leave — cost one day of pay each, a half day costs half, and an advance comes off what is left.
In a 30-day month with four Sundays, ₹15,000 with two days off, one half day and a ₹2,000 advance comes to ₹11,750.00. It is arithmetic, not legal advice.
Everything is worked out in your browser. Nothing you type is saved or sent anywhere — no sign-up, no account, and the numbers never leave this device.
How the calculator works
- It counts the days in the month — 28, 29, 30 or 31 — and divides the salary by it. That is one day of pay.
- It counts the weekly offs the month really has. September 2026 has four Sundays; March 2026 has five. Those, plus any paid days off you allow, are the month’s allowance.
- It adds up the days off taken: the weekly offs not worked, the other full days off, and half of each half day. A weekly off somebody worked makes up for one day off.
- Only the days beyond the allowance cost money — one day of pay each. Nothing is rounded until the end, and then only to the paisa, so two people with the same days off always get the same answer.
- It adds anything you enter for overtime or a bonus and takes off the advance. If the advance is more than the month’s pay, it says how much is left to take back next month.
A worked example
Priya earns ₹18,000 a month with Sunday off and one paid day off a month. In both February and March 2026 she took two days off and two half days, worked one Sunday, and had a ₹3,000 advance to repay.
| February 2026 | March 2026 | |
|---|---|---|
| Days in the month | 28 | 31 |
| One day of pay (₹18,000 ÷ the days) | ₹642.86 | ₹580.65 |
| Sundays the month holds | 4 | 5 |
| Days off allowed (Sundays + 1 paid day) | 5 | 6 |
| Days off taken (Sundays not worked + 2 days + 2 half days) | 3 + 2 + 1 = 6 | 4 + 2 + 1 = 7 |
| Over the allowance | 1 day | 1 day |
| Taken off for that day | −₹642.86 | −₹580.65 |
| Advance taken back | −₹3,000.00 | −₹3,000.00 |
| Net pay | ₹14,357.14 | ₹14,419.35 |
Same person, same days off, different months — and a different day of pay, because February’s salary is spread over 28 days and March’s over 31. March also holds five Sundays, so its allowance is a day larger and the extra Sunday off costs her nothing.
Why the days in the month, and not 30
Many employers divide by a fixed 30 because it is easy to remember. The trouble is that months are not 30 days long. With a fixed 30, the 28 days of February are worth only 28/30 of the salary, so somebody away for the whole of February would still have two days’ pay left over; a 31-day month is worth 31/30, so a whole month away would take off more than the salary.
Divide by the days in the month and each day is exactly its share — 1/28, 1/29, 1/30 or 1/31 — so the days always add up to the salary, no more and no less. Set the weekly off to “No weekly off”, enter every day of any month as a day off, and the net comes to exactly ₹0.00.
Some employers divide by 26, counting working days only. If an appointment letter or your state’s rules fix a method, that method governs. This calculator uses the days in the month because it is the rule Nivasik’s own salary screen uses: a day of pay is the monthly salary over the days in that month, never a fixed 30.
What it does not do
This calculator leaves out
- It does not work out PF, ESI, professional tax or TDS. Take those off separately if they apply to the person.
- It does not decide an overtime rate. The Government’s summary of the Labour Codes, in force from 21 November 2025, describes overtime paid at double the normal wage for the workers they cover — work the amount out for your case and add it under “Anything to add”.
- It does not check minimum wages. They are notified by the Government and differ by state and by skill; check the current rate that applies to your staff.
- It does not keep anything. Close the tab and the numbers are gone.
Do this for the whole team in Nivasik
The calculator does one person and one month, from numbers you type. Nivasik’s People & pay does the same arithmetic for everybody, from the attendance you mark each day:
- Attendance — one square per person per day; half days are half.
- Salary — a day of pay is the monthly salary over the days in that month, never a fixed 30.
- Advances — booked as money out on the day they are handed over, and taken off the payslip.
- Payslips — frozen once paid, so correcting an attendance mark later cannot change what was paid.
It is salary and payslips, not statutory payroll. Like this calculator, it does not work out PF, ESI, professional tax or TDS, and it files nothing — those stay with you or your accountant.
People & pay comes with the Group plan — ₹2,499 per property a month, from 3 properties. Every property can try it, with the rest of the product, free for 45 days; we do the setup.
Questions people ask
How do I calculate salary per day?
Divide the monthly salary by the number of days in that month. ₹15,000 a month is ₹500 a day in September (30 days), ₹483.87 in October (31 days) and ₹535.71 in February 2026 (28 days).
Is salary calculated on 30 days or on the actual days of the month?
Both are in use. A fixed 30 is simpler, but it makes a day in February worth less than its share of the month and a day in a 31-day month worth more. This calculator — like Nivasik’s salary screen — divides by the actual days, so a month always adds up to exactly the salary. If an appointment letter or a state rule fixes another method, that governs.
How is a half day counted?
As half a day present and half a day off. Two half days count the same as one full day off, and if they fall within the allowance they cost nothing.
Are Sundays and other weekly offs paid?
In this calculator, yes: the weekly offs the month actually holds are part of the allowance, so they are paid. If somebody works a weekly off, enter it under “Weekly offs worked” and it makes up for a day off elsewhere. Your own policy may differ.
Does it work out PF, ESI or tax?
No — and neither does Nivasik. It works out the month’s pay from attendance and advances only; it does not deduct PF, ESI, professional tax or TDS. Statutory deductions depend on the person and on how your business is registered, so take them off separately, with your accountant.
More free tools
Attendance register
A printable monthly attendance sheet — or a CSV for Excel — with weekly offs shaded.
Open the tool →GST calculator
Add GST, take it out of an MRP, and split it into CGST and SGST or IGST, to the paisa.
Open the tool →Margin calculator
Markup against margin, pricing from cost, and the real profit on an MRP item.
Open the tool →Official sources
Last reviewed 25 September 2026. The calculator does arithmetic; it is not legal or tax advice.
Stop doing these sums by hand.
Nivasik does this arithmetic from your real records — every bill, booking and attendance mark — free for 45 days, set up for you, with no card.