Notice Period Buyout Calculator India: ÷30 vs ÷26 Explained

Picture two employees resigning from the same company on the same day. Same CTC, ₹12 lakh a year. Same 60-day notice clause in the offer letter. One gets an HR-quoted buyout of roughly ₹48,000. The other is quoted just over ₹1,38,000, for the exact same 43 unserved days. Nobody broke a rule. They landed on opposite ends of a formula neither of them had ever seen written down.

That gap is the whole problem with typing “notice period buyout calculator India” into Google and expecting one formula to plug into: there isn’t one. Some HR teams divide your monthly pay by 30 calendar days. Others divide by 26, on the theory that Sundays aren’t working days you’re owed money for. Some run the math on your basic salary. Others run it on gross. A few, incorrectly, try to run it on your full CTC. All four choices are in play before you even get to the divisor debate.

What a Notice Period Buyout Actually Is

A notice period buyout, sometimes called notice pay recovery when it runs the other direction, is the amount you (or your new employer, if they’re sponsoring it as a joining incentive) pay in place of physically working out the days left on your notice. If your offer letter says 60 days and you can only serve 17 before your new company wants you at your desk, the remaining 43 days get converted into a rupee figure, and once that’s settled, HR signs off on an earlier last working day. Simple trade, on paper. Getting to the right number is where it stops being simple.

Why Every HR Team Uses a Different Formula

Start with the part almost nobody checks first: this isn’t governed by one national law. India has no central statute that caps or standardizes notice periods for private-sector resignations, and state Shops and Establishments Acts mostly regulate the minimum notice an employer owes an employee being let go, not what an employee owes on the way out. The buyout obligation, and the formula behind it, comes entirely from the contract you signed, enforceable the same way any other agreement is enforceable under the Indian Contract Act, 1872 (Quikchex’s breakdown of India’s notice period rules covers this well).

Which is why every HR vendor’s own worked example looks slightly different. GreytHR’s guide to notice period recovery walks through (Basic ÷ 30) × unserved days when the company is recovering money from a resigning employee, then switches to gross salary for the reverse case: paying out an employee being retrenched. FactoHR’s own recovery guide uses (Monthly salary ÷ 30) × remaining days and doesn’t specify basic or gross at all, leaving that to whatever the client company’s HR policy says.

On CiteHR, the closest thing India has to a running public forum of real HR practitioners comparing notes, the consistent answer is that IT and MNC employers commonly use 26 working days, government and PSU roles use Basic plus DA only, and everyone else defaults to whatever their own appointment letter literally says.

That 26-day convention shows up most often at the large Indian IT services employers, and it isn’t universal even inside that group. There’s more on how TCS, Infosys, Wipro, and Accenture structure their own notice clauses in our separate breakdown of how major Indian IT companies structure notice periods.

÷30 vs ÷26: What Actually Changes

Here’s the part most articles on this topic skip past. Swapping the divisor moves the number less than you’d think. Swapping the salary base moves it far more.

Divide by 26 instead of 30 and the buyout goes up about 15.4%. Switch from basic salary to gross salary, holding the divisor steady, and it can jump well past 100%, closer to 150% in a typical Indian pay structure.

The 15.4% comes straight from the arithmetic: 30 ÷ 26 works out to roughly 1.1538, so any amount calculated on a 26-day base is about one-sixth larger than the identical amount on a 30-day base, for the same number of unserved days. The salary-base swing is bigger because basic pay in most Indian compensation structures runs somewhere around 35 to 45% of gross. If HR quotes you a figure and won’t say which salary component it’s built on, that’s the question worth asking before you argue about 26 versus 30.

It’s tempting to read the 26-day convention as an IT-industry money grab. The likelier explanation, and this is a guess, not something verifiable from outside a company’s payroll system, is duller: it’s whatever number the payroll software shipped with by default, and nobody ever revisited it.

The Worked Example: ₹12L CTC, 60-Day Notice, 43 Days Unserved

Take a mid-level professional on a ₹12,00,000 CTC, roughly ₹1,00,000 a month. Assume a fairly typical pay structure: monthly gross of ₹83,500 (CTC minus the employer PF, gratuity accrual, and insurance that never actually lands in a payslip) and basic salary set at 40% of that, ₹33,400. They serve 17 days of a 60-day notice period before their new employer needs them.

Same employee. Same 43 days. Same offer letter clause that just says “notice pay applies.” Depending on which of those four boxes HR quietly defaults to, this person is looking at anywhere from ₹47,873 to ₹1,38,096, a spread of ₹90,223 on identical facts. We couldn’t find a single authoritative source that settles which one is “correct” either way, because there isn’t one to settle. Your offer letter is the only document that decides it, and if it’s silent, whatever HR’s payroll software defaults to decides it instead.

What to Check in Your Offer Letter Before You Trust Any Number

Five things worth finding before you accept whatever figure HR emails over:

1. The exact clause wording. Search your offer letter and HR policy document for “notice pay,” “buyout,” or “in lieu of notice.” The calculation, if one exists at all, usually sits right next to that phrase.
2. Which salary component it names: basic, basic plus DA, gross, or (incorrectly) CTC. If the document is silent, get HR to confirm it in writing before you pay anything.
3. Which divisor it specifies, if any. Most Indian offer letters don’t actually state 30 or 26. That silence means payroll software is making the choice for you, not the contract.
4. Whether your new employer is covering it. Some companies fold a buyout into a joining bonus, occasionally with a clawback clause if you leave within a year, which is worth raising during counter offer negotiations rather than after you’ve already signed.
5. Whether the shortfall gets rounded up to a full month regardless of the real gap. A handful of HR policies do this, and it quietly erases the entire 26-versus-30 debate in the company’s favor.

What Our Free Calculator Actually Computes

Everything above answers the rupee question. It doesn’t answer the other question sitting inside the same decision: what is your actual last working day, and how many of the remaining days are working days versus weekends you’d be paying for anyway? That’s what LastRound AI’s Notice Period Calculator is built to answer, not the buyout math. Enter your resignation date and your notice period (it has 30/60/90-day presets plus a custom field for anything else your offer letter specifies), and it returns your exact last working day, a working-days-versus-weekends breakdown, and the milestone dates in between. There’s a toggle for whether your resignation date itself counts as day one of the notice period, since that single setting can shift the final date by a full day, and different employers apply it differently.

Run your dates through the calculator first. Then come back to the table above, or build your own version of it with your real basic and gross figures, to work out what buying out the difference would actually cost. Those are two separate questions, and most people only ever ask one of them.

If the honest reason you’re trying to shorten a notice period is that a new offer has a start date you can’t move, the math above is worth doing carefully before you agree to anything. If you’re still mid-search and this is all hypothetical for now, tools like LastRound’s Auto-Apply exist for the earlier problem: getting enough tailored applications out the door to have a start date worth negotiating around in the first place.

FAQ

Is notice period buyout mandatory in India?

No. Indian labour law doesn’t require employers to offer a buyout option, and some HR policies refuse it outright, insisting employees serve the full period regardless of a new employer’s start date. Where a buyout exists, it’s a clause the company chose to write into its own policy, not a statutory right an employee can invoke.

Does the buyout use my CTC, gross salary, or basic pay?

It should be gross or basic salary, not full CTC, because CTC includes employer PF and gratuity contributions an employee never actually receives in hand. None of the real HR-vendor formulas checked for this piece, including GreytHR and FactoHR, used CTC as the base. If an offer letter’s number is built on CTC, that’s worth flagging to HR directly before paying it.

Why do some companies divide by 26 and others by 30?

Because the contract decides, not the law. Thirty represents calendar days in a month. Twenty-six represents working days, minus Sundays. IT and MNC employers lean toward 26 more often, according to HR forum reporting, but plenty of large employers across other sectors still use straightforward calendar-day math. Check the appointment letter’s exact wording before assuming either one applies.

The uncomfortable, honest part is that HR usually already knows which of those four boxes it uses, because the payroll software has it hardcoded. The employee is the only person in the conversation who doesn’t, until they ask. Ask before resigning, not after.