How to calculate loss of pay (LOP)

Where LOP days come from

Collect LOP days from the closed attendance month, not from memory or messages. Each source below needs its own check before payroll, because a wrong LOP day is one of the most visible errors an employee can find on a payslip, and one of the hardest to explain afterwards.

• Approved leave without pay, including leave taken beyond a paid balance.
• Days absent without approval, after regularization requests are settled.
• Half days from late arrivals past the cut-off or short hours, counted as 0.5.
• Penalty days from late marks under your attendance rules.
• Weekly offs or holidays made unpaid by your sandwich rule, where the policy says so.

The formula on different bases

LOP amount = Monthly salary / Divisor x LOP days. The divisor is the loss of pay basis in your policy: calendar days in the month, working days in the month, or a fixed number such as 30 or 26. Kavya, an HR executive in Hyderabad, has a monthly gross of ₹32,500 and 2.5 LOP days in November 2026, a 30-day month with 25 working days from Monday to Saturday. Calendar basis: ₹32,500 / 30 x 2.5 = ₹2,708.33. Working-day basis: ₹32,500 / 25 x 2.5 = ₹3,250.00. Fixed 26 days: ₹32,500 / 26 x 2.5 = ₹3,125.00. A fixed 30-day basis matches the calendar basis in November, but keeps dividing by 30 in a 31-day month too.

Which components LOP reduces

Apply LOP to the components earned by working days: basic, DA, HRA and special allowance are normally reduced in the same proportion. Reimbursements tied to bills, and one-time payments such as a joining bonus, are normally left alone unless your policy says otherwise. Once earned wages are known, work out PF, ESI and professional tax on the earned amounts, not on the full-month salary, so recalculate them rather than subtracting LOP from a net figure. Show LOP days and the amount clearly on the payslip, so the employee can match them with their own attendance.

Mistakes to avoid

LOP errors damage trust quickly, because employees check them first on every payslip. Most come from process rather than arithmetic. Check your payroll routine against this list before the next run, and again whenever the policy or the salary structure changes.

• Switching the divisor between months or branches without a written rule.
• Taking LOP from raw punches before corrections and leave approvals are final.
• Counting a sandwiched weekly off as LOP when the policy does not say so.
• Deducting LOP from net salary instead of recomputing earnings and deductions.
• Charging LOP for a joiner's days before joining on top of prorating the salary.

Step by step

1. Fix the LOP basis in policy. Choose calendar days, working days or a fixed number of days and write it in the salary policy. ZeniaHR's deduction policy sets the loss of pay basis as working days, calendar days or a fixed 30, 26, 24 or 22 days, with branch overrides.
2. Close attendance first. Take LOP days only after corrections, leave approvals and penalty waivers are final and the attendance month is closed.
3. Count LOP days by source. List leave without pay, unapproved absence, half days and penalty days separately for each employee, then add them up.
4. Apply the half-day and sandwich rules. Count half days at the half-day pay fraction and check whether weekly offs between LOP days are unpaid. ZeniaHR's deduction policy sets the half-day pay fraction and whether weekly offs and holidays are paid.
5. Calculate the per day rate and LOP. Divide the monthly salary by the divisor and multiply by LOP days, component by component, rounding only at the end.
6. Recalculate statutory deductions. Work out PF, ESI and professional tax on the earned amounts after LOP, not on the full month's salary.
7. Show LOP on the payslip. Print the LOP days and the amount, so each employee can check them against their own attendance record.

Frequently asked questions