The 8th Pay Commission was constituted in November 2025 with consultations continuing through 2026, though no final report has been submitted. According to reports from ClearTax, the effective date is widely expected to be January 1, 2026, but implementation could extend into 2027 if consultations continue. This timeline gap could result in employees receiving arrears covering approximately 18 to 24 months depending on the actual implementation date and fitment factor approved by the government. As reported by Financial Express, many analysts believe a similar lag is possible, with implementation potentially during the second half of 2027 if the government takes time to finalise and implement the recommendations. The consultations for the 8th Pay Commission are currently underway, with the revised pay structure widely expected to take effect from January 1, 2026, though implementation could be delayed until 2027. The expectation of a sizeable arrear payment comes from the experience of the 7th Pay Commission, which was set up in 2014, submitted its report in 2015, and its recommendations were approved in 2016. Although the revised salary was made effective from January 1, 2016, employees received arrears for the period before the actual implementation, and similar delays may occur with the 8th Pay Commission.
The eventual arrear payout will depend on two critical factors: the fitment factor approved by the government and the employee's current pay level. As reported by ClearTax, employee unions have proposed different fitment factors, while current estimates range between 1.92 and 3.83. A higher fitment factor would result in larger salary revisions and correspondingly higher arrears. The main issue is called "income bunching" - normally, a salary increase would be spread across different years, but if delayed arrears covering several months or years are paid together, the entire amount may be added to the employee's income in the year of receipt. This can increase total taxable income, potentially pushing some employees into a higher tax bracket and resulting in higher tax deduction. The final arrear amount will largely depend on the fitment factor approved by the government and the employee's pay level, with the fitment factor being the multiplier used to revise existing basic pay. Since employees could receive arrears covering multiple years in one go, concerns have emerged that the lump-sum payment may increase taxable income and potentially lead to a higher tax outgo.
Section 89(1) of the Income Tax Act, 1961 provides relief for employees receiving lump-sum arrears by preventing excess taxation due to salary from earlier years being received in later financial years. According to CA Chandni Anandan from ClearTax, the calculation involves determining the tax liability difference with and without arrears for both the year of receipt and the years the salary pertains to. If the difference in the receipt year is higher, the excess can be claimed as relief. For arrears spanning multiple years, the calculation must be done year-wise by spreading the arrears over relevant previous years. As reported by Financial Express, there is no fixed amount of relief because Section 89(1) relief depends on the employee's income in the year of receipt, tax position in earlier years, and how much arrears relate to each year. The relief can be modest or significant depending on whether the arrears move the employee into a higher slab in the current year and how much tax would have applied in the earlier years. The provision ensures that taxpayers are not unfairly burdened with higher taxes simply because salary that pertains to earlier years is received in a later year, adjusting the tax impact by allocating the arrears to the years to which they actually relate. Employees who want to claim relief under Section 89(1) must submit Form 10E before filing their income tax return. Failure to file this form can lead to rejection of the tax relief claim.
Experts recommend comparing tax liability under both the old and new tax regimes to determine which is more beneficial. As reported by ClearTax, employees with substantial deductions such as Section 80C investments, Section 80D health insurance, House Rent Allowance (HRA), or home loan benefits may find the old tax regime more advantageous. For employees with limited deductions and simpler salary structures, the new tax regime could still prove beneficial after receiving arrears. According to Financial Express, in many cases, the old regime may be more useful for employees with significant deductions such as Section 80C, 80D, HRA, or home loan benefits, because those deductions can soften the impact of the arrears. However, if an employee has fewer deductions and a simpler salary structure, the new regime may still work better even with arrears, especially if the overall tax rate remains lower after comparison. The only reliable approach is to compute tax under both regimes for the year of receipt and check the net liability after Section 89(1) relief. Employees can also review eligible tax-saving options such as investments under Section 80C, health insurance deductions under Section 80D and National Pension System benefits, depending on their individual eligibility.
Tax experts advise employees to obtain a year-wise breakup of arrears from their employer once the pay revision is implemented. According to CA Chandni Anandan from ClearTax, employees should first obtain detailed arrears statements showing allocation across financial years, compare tax impact under both regimes, and file Form 10E where Section 89(1) relief is being claimed. They should also review available deductions such as Section 80C, Section 80D, National Pension System (NPS) contributions, and carefully verify Form 16 to ensure arrears and relief claims are correctly reflected. As reported by Financial Express, employees should first ask for a detailed pay revision and arrears statement from the employer showing the breakup by financial year, because this is the foundation for claiming the correct relief. They should then calculate the tax under both regimes and identify whether Section 89(1) relief will reduce the burden materially. The amount of tax relief available varies from employee to employee, with experts cautioning that Section 89(1) should be viewed as a neutralising mechanism rather than a guaranteed fixed benefit. Employees should obtain a detailed arrear statement from their department or employer that clearly mentions the revised salary, allowance changes, total arrear amount and the breakup of arrears for each financial year. This information will be necessary to calculate tax correctly and claim relief.
