Gratuity Calculation and Tax Rules: How the 15 by 26 Formula Actually Works

Gratuity looks straightforward on paper and surprisingly confusing in real life.

Employees often see it in their CTC, assume it is being deducted every month, and then only revisit it when the full-and-final settlement arrives. That is usually when the questions begin:

• •how was this number calculated?
• •which salary components count?
• •is the amount taxable?
• •what happens if I leave before five years?

This is where the formula matters.

What gratuity is

For establishments covered by the Payment of Gratuity Act, gratuity is a statutory terminal benefit. It is not a performance bonus and it is not a monthly deduction from your take-home salary.

Companies may show gratuity as part of CTC for costing purposes, but the employee does not see it as a monthly credit or debit. The actual payment generally shows up when the employment ends and the legal conditions are met.

The standard formula under the Act

For many employees covered by the Act, the basic formula is:

Gratuity = Basic + DA multiplied by 15 divided by 26 multiplied by completed years of service

The two most important details are easy to miss:

• •salary here usually means Basic plus Dearness Allowance
• •the denominator is 26, not 30

That 26-day convention is why gratuity is often a little higher than employees expect when they first try the math.

A worked example

Suppose your final monthly Basic plus DA is ₹60,000 and your service counts as 8 completed years.

Then:

• •15 divided by 26 = 0.5769
• •₹60,000 multiplied by 0.5769 = about ₹34,615
• •₹34,615 multiplied by 8 = about ₹2,76,923

That is the kind of calculation you should compare with the HR settlement sheet.

What counts as completed service

One source of confusion is the five-year threshold.

In most ordinary resignation cases, gratuity is discussed as a benefit that becomes payable after five years of continuous service. Death and disablement are different and are treated separately under the Act.

There is also a widely discussed issue around 4 years and 240 days. Some court decisions have supported employees in such cases, especially where the employee has completed the required days in the fifth year. But this is not a casual shortcut you should rely on without checking your exact facts and local interpretation.

Practical lesson: if you are close to the threshold, do not resign based on a WhatsApp summary of the law. Get the dates and service records checked properly.

The rounding rule people forget

For the formula, service beyond six months is generally rounded up to the next completed year.

So:

• •6 years and 4 months is usually treated as 6 years
• •6 years and 7 months is usually treated as 7 years

That rounding can materially change the final payout.

Which salary components do not count

Employees often try to calculate gratuity on gross salary or CTC. That is usually wrong.

In most covered cases, gratuity does not use:

• •HRA
• •bonus
• •special allowance
• •reimbursements

It is usually tied to Basic plus DA.

Tax treatment under Section 10(10)

Gratuity can enjoy a major tax exemption, but the exact treatment depends on category and applicable limits.

For many private-sector employees covered by the Act, the exempt amount is broadly the least of:

1. •actual gratuity received
2. •gratuity calculated under the formula
3. •the applicable statutory limit

The commonly cited limit for many private employees is ₹20 lakh, and employees should check how prior exempt gratuity, if any, affects their overall position.

In plain language: many routine gratuity payouts are either fully exempt or largely exempt, but you should still verify the tax treatment instead of assuming HR payroll has handled it perfectly.

Practical checks before you accept the full-and-final number

Use this list:

1. •confirm the final Basic plus DA used by payroll
2. •verify the counted years of service
3. •check whether rounding has been applied correctly
4. •ask whether the establishment is covered by the Act
5. •verify the tax treatment separately if the amount is large

The practical takeaway

Gratuity is one of those benefits that becomes simple once the correct inputs are in front of you.

If you know the salary definition, the service period, the rounding rule, and the broad tax framework, you can usually tell within a few minutes whether the settlement figure makes sense.

That is far better than discovering a mistake after the exit paperwork is already closed.