Job Switch Tax Guide 2026: Avoid a Surprise Bill at ITR
Switched jobs this year? See why two employers cut too little tax, what Form 122 does, what to collect from your old employer, and how to file your ITR.
You switched jobs this year. Both employers ran payroll by the book. Then you sit down to file your return and the portal says you owe ₹80,000.
Nobody made a mistake. Each employer did exactly what the law asks. The problem is that neither of them knew about the other. This guide explains why that happens, how to stop it with one form, what to collect before your last day, and what it costs if you leave it to filing time.
The rules quoted here are from the Income-tax Act, 2025, which applies from 1 April 2026. Where a section was renumbered, the old number is in brackets.
Why a job switch leaves tax unpaid
Your employer deducts TDS (tax deducted at source) from your salary. It works out the year's tax on the salary it expects to pay you and splits it across your months (section 392, earlier 192). It only counts what it pays. It has no way of seeing what your last employer paid you unless you tell it.
So each employer treats you as a person with one job. Each one gives you the ₹75,000 standard deduction. Each one starts you at the 0% slab. And under the new regime, each one applies the rebate that wipes out tax when taxable income is ₹12 lakh or less (section 156, earlier 87A).
Take an example. You earn ₹1 lakh a month for 5 months, then move to a job paying ₹1.2 lakh a month for the remaining 7 months, with a ₹50,000 joining bonus. New regime.
Who sees what
| Who | Salary it counts | Tax it works out |
|---|---|---|
| Old employer | ₹5,00,000 | ₹0 (taxable ₹4.25 lakh, rebate applies) |
| New employer | ₹8,90,000 | ₹0 (taxable ₹8.15 lakh, rebate applies) |
| Your tax return | ₹13,90,000 | ₹80,340 |
On ₹13.9 lakh you get one standard deduction, so taxable income is ₹13.15 lakh. That is above the rebate limit. The slab tax is ₹77,250 and the 4% cess takes it to ₹80,340. Not one rupee of it was deducted during the year.
Three or four jobs make it worse
The rule does not change with more jobs. It just repeats. Every employer that does not know about the others hands out the standard deduction and the low slabs again. Take three jobs in one year. ₹80,000 a month for 4 months plus ₹1 lakh of severance, then ₹1 lakh a month for 4 months plus a ₹50,000 joining bonus, then ₹1.5 lakh a month for 4 months. Not one employer deducts any tax, and you owe ₹92,820 at filing.
Joining bonus and severance are salary too
A joining bonus is taxed as salary in the year you receive it (section 18(1)(b), earlier 17(3)(iii)). So is compensation you get when a job ends (section 18(1)(a), earlier 17(3)(i)). Two kinds get a deduction under section 19. Retrenchment compensation paid to a workman, up to a limit set by law, and a voluntary retirement scheme payment up to ₹5 lakh. If your payout is neither, all of it is taxable.
Quick Tip
The fix is one form, Form 122
From 1 April 2026, Form 122 replaced Form 12B. You fill it in and hand it to your new employer. It lists each earlier employer this year, with their name, TAN, the period you worked there, the salary they paid and the tax they deducted. You attach their TDS certificates (section 392(4)(a), rule 204(1) of the Income-tax Rules, 2026).
Once your employer has it, it counts your full salary for the year so far, works out the tax on the whole thing, subtracts what your old employer already deducted, and spreads the rest over your remaining months (section 392(5)(c)).
Your monthly pay will dip
In the example above, the new employer would deduct about ₹80,000 across 7 months, roughly ₹11,500 a month more than you expected. It is the same tax you owe anyway, paid on time and with no interest.
The form is optional. Nobody will chase you for it. That is why people skip it and get the bill at filing time.
Quick Tip
What to collect from your old employer
Ask for these during your notice period. Once your last day passes, you lose access to the HR portal and every document means chasing someone by email.
Tax computation sheet
It shows the salary, exemptions and deductions your employer counted for the months you worked there, and the tax it deducted. These are the numbers that go into Form 122.
Payslips for the last 3 or 4 months
Include the full and final settlement. It carries items paid once, such as severance, a bonus or leave encashment, which change your tax and are easy to forget.
Latest appraisal or salary revision letter
If you got a raise during the year, this proves what you were actually paid after it, so the salary you report matches the employer's records.
Form 130 after the year ends
Form 130 replaced Form 16 from tax year 2026-27. It is your TDS certificate from that employer. Employers issue it by 15 June after the year, so put a reminder in your calendar.
Also note your UAN (the PF account number that stays with you across jobs). You need it to move your PF, which is covered further down.
What waiting until filing costs you
If the tax left after TDS is ₹10,000 or more, you must pay it as advance tax (section 404, earlier 208). Advance tax is due in parts during the year, by 15 June, 15 September, 15 December and 15 March (section 408). Salaried people rarely think about it because TDS normally covers everything. After a job switch, it does not.
Miss those dates and two kinds of interest start running.
Interest on a ₹80,340 gap paid on 20 July
| Rule | How it works | Roughly |
|---|---|---|
| Section 424 (earlier 234B) | 1% a month from April until you pay. April to July is 4 months. | ₹3,210 |
| Section 425 (earlier 234C) | 3% on what was short at each of the first three dates, 1% at the March date | ₹4,060 |
| Total extra | On top of the ₹80,340 itself | ₹7,270 |
The department rounds a few figures along the way, so your exact amount can differ by a few rupees. The total stays close to this.
Miss 31 July and it gets worse
Salaried people without business income file by 31 July (section 263). File after that with tax still unpaid and section 423 (earlier 234A) adds another 1% a month until you file.
There is also a late fee of ₹5,000, or ₹1,000 if your total income is ₹5 lakh or less (section 428). You can still file a belated return until 31 December, 9 months after the tax year ends.
Spotted the gap during the year?
Good. You have two ways out. Give your current employer Form 122 now so it deducts the rest from your salary. Or pay the gap yourself as advance tax on the income tax portal before the next due date. Either one stops most of the interest from growing. Use the advance tax calculator to see what is due by each date, and the advance tax guide for how to pay.
Filing your ITR after a job switch
Before you submit your ITR (income tax return), go through this list.
- Report salary from every employer. Each Form 130 shows one employer's salary. Add them all, including the months at a job you left in April.
- Claim the standard deduction once. It is ₹75,000 under the new regime and ₹50,000 under the old, for the whole year (section 19, earlier 16(ia)). Each Form 130 shows it, but you get it only once.
- Old regime? Claim 80C (now section 123) once too. If you declared ₹1.5 lakh of investments to both employers, both let it reduce your TDS. In your return the limit is ₹1.5 lakh in total.
- Match your TDS with your AIS. The Annual Information Statement on the income tax portal lists the TDS each employer deposited against your PAN. If a payslip shows TDS that the AIS does not, ask that employer's HR to correct its TDS return.
- Pay the balance first, then file. Any tax still due, plus interest, is paid as self assessment tax before you submit the return (section 266, earlier 140A).
- Check for a refund. If an employer deducted on a full year's expected salary and you left before it adjusted your TDS, you paid too much. The return gets it back.
Not sure which regime suits two salaries plus your deductions? Run the totals through the old vs new regime calculator before you pick.
Move your PF, do not withdraw it
Leaving a job makes it tempting to cash out your PF. Before 5 years, that costs you tax. Your PF balance is tax free when you have 5 years of continuous service, and service with earlier employers counts if you transfer the balance across (Schedule XI, paragraph 8). Withdraw before 5 years and the employer's share, the interest and any 80C you claimed on your own share become taxable, with 10% TDS when the payout is ₹50,000 or more (Schedule XI, paragraph 9, and section 392(7)). The exception is a job that ended because of ill health or the employer closing down.
Transfer it to your new employer's account using your UAN on the EPFO portal. Your years of service keep counting and your money keeps earning interest. The EPF calculator shows what that balance grows to by retirement.
Work out your own gap
Enter each job below with its monthly salary, the months you worked, and any joining bonus or severance. Say whether you gave each new employer Form 122. If you have your payslips, enter the TDS actually deducted instead of the estimate. The calculator shows what you owe or get back at filing, and the full working.
Job Switch Tax Calculator
Tax due at filing after 2 to 4 employers in one tax year
Your jobs this tax year
Job 1
Gross pay on your payslip before TDS. Under the old regime, leave out the exempt part of allowances such as HRA.
Taxed as salary in the year you receive it (section 18(1)(b) of the Income-tax Act, 2025; earlier 17(3)(iii)).
Taxed as salary (section 18(1)(a); earlier 17(3)(i)). If part of it is exempt, such as retrenchment compensation to a workman or a voluntary retirement scheme payment up to ₹5 lakh, enter only the taxable part.
Job 2
Gross pay on your payslip before TDS. Under the old regime, leave out the exempt part of allowances such as HRA.
Taxed as salary in the year you receive it (section 18(1)(b) of the Income-tax Act, 2025; earlier 17(3)(iii)).
Taxed as salary (section 18(1)(a); earlier 17(3)(i)). If part of it is exempt, such as retrenchment compensation to a workman or a voluntary retirement scheme payment up to ₹5 lakh, enter only the taxable part.
Form 122 (earlier Form 12B) tells a new employer what your earlier employers paid you and deducted this year.
- Tax due when you file
- ₹80,340
- Tax for the year ₹80,340 − TDS by your employers ₹0
- Salary for the year
- ₹13.90 L
- Taxable income
- ₹13.15 L
- Tax for the year
- ₹80,340
- TDS by all employers
- ₹0
Why the gap
An employer without Form 122 works out tax on its own salary alone. Each one gave you the ₹75,000 standard deduction and the low slabs again, and up to ₹12,00,000 of taxable income the rebate under section 156 (earlier 87A) cleared the tax. Your tax for the year is on the total, with one standard deduction.
With Form 122 to every new employer
Your employers would have deducted ₹80,340 between them, the full tax for the year, and nothing would be left for filing.
A balance of ₹10,000 or more is advance tax (section 404 of the Income-tax Act, 2025; earlier 208), due in parts by 15 June, 15 September, 15 December and 15 March (section 408). Paying late adds interest under sections 424 and 425 (earlier 234B and 234C). Pay it as soon as you spot it, or, if your current employer does not have Form 122 yet, give it one so it deducts the rest from your remaining salary. A resident aged 60 or more with no business income pays no advance tax (section 403(3)).
Whatever is still unpaid is paid before you file your return, as self-assessment tax with any interest (section 266; earlier 140A).
What each employer saw
- Job 1
- Months
- 5
- Salary paid
- ₹5.00 L
- Salary it counted
- ₹5.00 L
- Taxable it counted
- ₹4.25 L
- Form 122
- —
- TDS deducted
- ₹0
- Job 2
- Months
- 7
- Salary paid
- ₹8.90 L
- Salary it counted
- ₹8.90 L
- Taxable it counted
- ₹8.15 L
- Form 122
- No
- TDS deducted
- ₹0
- Whole year
- Months
- 12
- Salary paid
- ₹13.90 L
- Salary it counted
- Taxable it counted
- ₹13.15 L
- Form 122
- TDS deducted
- ₹0
| Employer | Months | Salary paid | Salary it counted | Taxable it counted | TDS deducted | Form 122 |
|---|---|---|---|---|---|---|
| Job 1 | 5 | ₹5.00 L | ₹5.00 L | ₹4.25 L | ₹0 | — |
| Job 2 | 7 | ₹8.90 L | ₹8.90 L | ₹8.15 L | ₹0 | No |
| Whole year | 12 | ₹13.90 L | ₹13.15 L | ₹0 |
Tax for the year, step by step
T = S − SD − D = ₹13,90,000 − ₹75,000 − ₹0 = ₹13,15,000.
R: taxable income is above ₹12,00,000, so there is no rebate and no marginal relief here: R = ₹0.
P adds up the slabs of your regime. H is nil up to ₹50 lakh of taxable income; above it the surcharge is 10%, 15% above ₹1 crore and 25% above ₹2 crore (37% above ₹5 crore under the old regime) of P − R, cut by marginal relief at each step. K is 4% of P − R + H. T and the tax are each rounded to the nearest ₹10 (section 516 of the Income-tax Act, 2025; earlier 288A and 288B); D is that last step.
How the balance is worked out
Tax is slab tax on the taxable income, less the section 156 (87A) rebate or its marginal relief, plus surcharge and 4% cess, rounded to the nearest ₹10. Each employer's TDS is the same sum on the salary it counted. An employer given Form 122 counts everything paid so far and deducts the year's tax less what earlier employers deducted (section 392(5)(c); earlier 192(3)).
About the Job Switch Tax Calculator
When you change jobs during the year, each employer deducts TDS from the salary it pays you, at the average rate on your estimated salary for the year (section 392(1) of the Income-tax Act, 2025; earlier 192(1)). Unless you tell it, a new employer does not know what you earned before, so it gives you the standard deduction, the low slabs and the rebate as if it were your only job. This calculator adds up to four jobs, works out the tax on the whole year, and shows the gap you settle when you file.
How it works
- Enter each job in order: monthly salary, months paid, and any joining bonus or severance.
- Say whether you gave each new employer Form 122 (earlier Form 12B).
- The calculator estimates each employer's TDS on the salary it counted, then the tax on your total salary with one standard deduction.
- The difference is what you owe, or get back, when you file.
The rule people miss
The standard deduction (₹75,000 in the new regime) and the rebate (taxable income up to ₹12,00,000) apply once a year, not once per employer. Two salaries of ₹8 lakh are each tax-free on their own; ₹16 lakh together is not.
What to get from each old employer
- Tax computation sheet for the months you worked there: the salary, exemptions and deductions it counted, and the TDS.
- Payslips for the last 3–4 months, including the full-and-final settlement with any severance, bonus or leave encashment.
- Latest appraisal or salary revision letter, so the salary you report matches what was paid after any raise.
- Form 130 (earlier Form 16) after the year ends; employers issue it by 15 June.
How to tell a new employer
Give the new employer Form 122 (earlier Form 12B) with each earlier employer's name, TAN, period of work, salary and TDS, and attach their TDS certificates. It is optional, but once your employer has it, it deducts the rest of the year's tax from your remaining salary, so nothing piles up for filing (section 392(4)(a) of the Income-tax Act, 2025; rule 204(1) of the Income-tax Rules, 2026).
What this estimate assumes
- Each employer squares up its TDS on the salary it actually paid by your last month there.
- Gratuity and leave encashment paid on leaving are left out: they have their own deductions under section 19 of the 2025 Act (earlier 10(10) and 10(10AA)).
- Professional tax, other income, house-property loss and interest for late advance tax are not included.
- Under the old regime, your deductions were declared to every employer.
- You are a resident below 60.
Sources: the Income-tax Act, 2025 (sections 18, 19, 156, 202, 266, 392 and 403 to 425), as published in the Gazette of India; Forms 122 and 130 from TaxGuru's copies, because incometaxindia.gov.in does not open for automated checks.
Want to explore more scenarios?
Try Full CalculatorThe short version
- Every employer deducts tax as if it is your only job. That is why a switch leaves a gap.
- Give your new employer Form 122 in your first month. It closes the gap through your salary.
- Before you leave, collect the tax computation sheet, 3 or 4 payslips, your latest appraisal letter, and later Form 130.
- A gap of ₹10,000 or more is advance tax. Waiting until filing adds interest.
- When you file, report every salary and claim the standard deduction once.
- Transfer your PF. Do not withdraw it.
References
- Income-tax Act, 2025, Gazette of India (sections 18, 19, 263, 266, 392, 403 to 408, 423 to 425 and 428)
- TaxGuru, Form 122 (earlier Form 12B), salary from earlier employers
- TaxGuru, Form 130 (earlier Form 16), the salary TDS certificate
- Income Tax Department, guide for salaried taxpayers
- Income Tax Department, e-Pay Tax (advance and self assessment tax)
- Finance Act, 2026, Gazette of India (return due dates and late fee)
Frequently Asked Questions (FAQs)
Why do I owe tax after changing jobs when both employers deducted TDS?
Each employer works out tax on the salary it pays you, as if that were your only income. Both give you the standard deduction and the low slabs, and each salary can sit under the ₹12 lakh rebate limit. Your tax for the year is on the total, with one standard deduction, so the gap shows up when you file.
What is Form 122 and do I have to give it?
Form 122 replaced Form 12B from 1 April 2026. It tells your new employer what earlier employers paid you this year and how much tax they deducted. It is optional, but once the employer has it, it deducts the rest of the year's tax from your remaining salary, so nothing piles up for filing.
What should I collect from my previous employer?
The tax computation sheet for the months you worked there, your last 3 or 4 payslips including the full and final settlement, your latest appraisal or salary revision letter, and Form 130 (earlier Form 16) after the year ends. Employers issue Form 130 by 15 June.
Are a joining bonus and severance pay taxable?
Yes. Both count as salary under section 18 of the Income-tax Act, 2025 and are taxed in the year you receive them at your slab rate. Retrenchment compensation paid to a workman, up to a limit set by law, and a voluntary retirement scheme payment up to ₹5 lakh have a deduction under section 19.
How much interest will I pay if I settle the gap only at filing?
Section 424 charges 1% a month from April until you pay. Section 425 adds interest for missing the advance tax dates. On a ₹80,340 gap paid in July, the two come to roughly ₹7,300.
Should I withdraw my PF when I switch jobs?
Transfer it instead. PF stays tax free after 5 years of continuous service, and service with earlier employers counts when the balance is transferred. Withdraw before 5 years and the employer's share, the interest and any 80C you claimed become taxable, with 10% TDS when the payout is ₹50,000 or more.
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