Arrears are about one period but paid in another
Calculate arrears when an increment takes effect from an earlier date than the month it is processed in, and understand why the period it relates to matters.
Arrears calculator
What is owed when an increment takes effect from a date earlier than the month it is processed in.
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The Formula
The monthly difference between the old and revised salary, multiplied by the months since the effective date.
Two Periods
The months the arrears relate to, and the month they are paid in. Both need recording.
Statutory Effect
Arrears generally attract PF and, where applicable, ESI — computed against the period they belong to.
How arrears arise
Arrears occur when an increment takes effect from a date earlier than the month in which it is processed — most often because a review cycle ran late, or an approval came through after payroll had closed.
The arithmetic is straightforward: the monthly difference between the old and revised salary, multiplied by the number of months between the effective date and the month of processing. A rise from ₹25,000 to ₹30,000 effective three months ago produces ₹15,000 of arrears.
What is not straightforward is everything that hangs off it.
Why the period matters more than the amount
Arrears are about one period but paid in another, and that distinction runs through several calculations at once.
Statutory contributions. Arrears of wages generally attract provident fund, and where the employee is covered, ESI. The contribution relates to the period the arrears belong to, which is why an arrears payment can require a revised return rather than simply appearing in the current month.
Income tax. Tax is generally deducted on receipt, but relief is available where arrears relate to earlier years. That relief is only claimable if somebody recorded which years the arrears related to — a detail routinely lost when arrears are paid as a single lump with no breakdown.
The payslip. An employee who sees an unexplained lump on their payslip will ask what it is. Showing the arrears period, the monthly difference and the months covered answers the question before it is asked.
Arrears calculator FAQs
Do arrears attract PF?
Arrears of wages generally do, computed against the period the arrears relate to rather than the month of payment.
How are arrears taxed?
Generally on receipt, though relief is available where they relate to earlier years. Claiming that relief requires knowing which years — so record the period, not just the amount.
Should arrears appear separately on the payslip?
Yes. An unexplained lump sum generates a query every time. Show the period, the monthly difference and the months covered.
Which month do arrears belong to for statutory purposes?
Contributions generally follow the month of payment, while the entitlement relates to the earlier period. Keeping the two straight is the whole discipline — the period arrears are about is not the period they are paid in.
Do arrears change the earlier month's payslip?
They should not. Reissuing a settled payslip breaks the register and any filing already made from it. Show arrears as a separate line in the month paid, with the period they cover stated.
Do arrears affect gratuity or leave encashment already paid?
If a revision changes the last drawn wage retrospectively, terminal payments computed on the old figure may need revisiting. This is the expensive tail of a backdated increment and is usually missed.
Stop calculating this one employee at a time
Klok computes this on every payroll run, for every employee, from your own attendance and salary data — with the working shown.