Gratuity Calculation Formula

The gratuity calculation formula is the statutory method prescribed by the Payment of Gratuity Act, 1972 to compute the lump-sum gratuity payable to an employee on cessation of employment after at least 5 years of continuous service. The formula — (Last Drawn Salary x 15 x Years of Service) / 26 — is the single most important number in full and final settlement calculations and one of the largest line items in any long-tenured employee’s exit package. The Payment of Gratuity (Amendment) Act, 2018 raised the tax-exempt ceiling to ₹20 lakh, where it remains today.

What is the Gratuity Calculation Formula?

The formula appears in Section 4(2) of the Payment of Gratuity Act, 1972, which governs gratuity for every establishment with 10 or more employees on any day in the preceding 12 months. The Act applies regardless of the employee’s salary level or designation — there is no upper salary ceiling for coverage, unlike the Payment of Bonus Act.

The formula has three components:

• Last Drawn Salary: Basic salary plus dearness allowance at the time of cessation. It does not include HRA, special allowances, performance bonus, overtime, or any other component.
• 15: The statutory multiplier representing 15 days of wages per completed year of service.
• 26: The statutory divisor representing the number of working days in a month (30 minus 4 weekly off-days).

The 15/26 ratio works out to approximately 57.7% — meaning gratuity pays roughly 0.577 months of salary for every full year of service.

Calculation Formula with Worked Example

Standard formula:

Gratuity = (Last Drawn Basic + DA x 15 x Years of Service) / 26

Example 1: An employee with last drawn basic+DA of ₹50,000 per month, completing 8 years of continuous service:

Example 2: A long-tenured employee with last drawn basic+DA of ₹2,50,000 per month, completing 30 years of service:

This example shows where the ₹20 lakh exemption becomes the binding constraint. For very senior or long-tenured employees, the taxable excess can be material and warrants tax-planning conversation at exit.

Tax Treatment

For non-government employees covered under the Payment of Gratuity Act, the tax exemption under Section 10(10)(ii) of the Income Tax Act 1961 is the lowest of:

1. Actual gratuity received
2. ₹20,00,000 (statutory limit)
3. (15 / 26) x last drawn salary x completed years of service

Anything in excess of the lowest of the three figures is taxable as salary income at the employee’s slab rate, with TDS withheld by the employer at the time of payment.

The ₹20 lakh ceiling is a lifetime aggregate — it applies across all employers in the employee’s career, not per employer. An employee who claims ₹15 lakh exemption from one employer and later receives ₹10 lakh gratuity from a subsequent employer can only claim a further ₹5 lakh exemption.

For government employees, gratuity is fully tax-exempt under Section 10(10)(i) without any monetary ceiling.

Statutory Ceiling: 2018 Amendment

The current ₹20 lakh ceiling was set by the Payment of Gratuity (Amendment) Act, 2018 (Act 12 of 2018). The amendment Bill was passed by the Lok Sabha on 15 March 2018 and the Rajya Sabha on 22 March 2018, and brought into force via Government Notification S.O. 1420(E) dated 29 March 2018, with effect from the same date.

The amendment raised the ceiling from ₹10 lakh to ₹20 lakh, aligning private-sector gratuity with the post-Seventh Pay Commission ceiling for central government employees. The 2018 Act also empowered the Central Government to notify the maximum amount of gratuity by executive notification rather than requiring further legislative amendment — a flexibility that has not yet been exercised.

The corresponding Income Tax exemption was notified to align with the statutory ceiling, ensuring the ₹20 lakh limit applies to both the entitlement under the Act and the Section 10(10) tax exemption.

Service Rounding Rules

Gratuity service is counted in completed years:

• 6 months or more above a completed year is rounded up to the next full year.
• Less than 6 months is ignored.

Examples:

This rounding is one of the most commonly mishandled details in payroll, and it materially affects the final amount — a single year’s difference at ₹1 lakh basic+DA is ₹57,692 of additional gratuity.

Common Employer Mistakes

1. Using gross salary instead of basic+DA. The Act is explicit: wages for gratuity means basic plus DA only. Including HRA, special allowance, or overtime overstates the liability.
2. Computing on CTC instead of last drawn. The 4.81% CTC provision is an estimate; the payout must be recomputed on actual last drawn salary at exit.
3. Withholding gratuity for poor performance. Forfeiture is permitted only for misconduct causing damage, riotous behaviour, or moral turpitude. Withholding for performance issues is illegal.
4. Missing the 30-day payment deadline. Beyond 30 days, simple interest under Section 8 of the Act becomes payable for the delay period.
5. Denying the 4 years 240 days rule. Employees with 4 years and 240 days of continuous service are entitled to gratuity under the Madras High Court ruling.

How Omnivoo Handles Gratuity Calculation

Omnivoo provisions gratuity monthly at 4.81% of basic salary as part of every payroll cycle, surfacing the accrued liability for each employee in real time. At the time of exit, the platform applies the statutory formula on last drawn basic+DA, applies the correct service rounding rules, computes the Section 10(10)(ii) tax exemption, and includes the net amount in the full and final settlement. The 30-day payment deadline is enforced automatically — the FnF cannot be marked complete without gratuity disbursement, and any delay-interest calculation is generated alongside the payout.