You earned the same and worked the same days, so why is the credit a few thousand rupees short? Before you panic or fire off an angry email to HR, know this: in most cases your gross salary did not change, your deductions did. And every rupee is usually traceable on your payslip. This guide decodes every line, for private and government employees, so you can find exactly where the money went in ten minutes.
The 30-second answer
🟢 Verified and last reviewed: 29 May 2026 · RTI Wiki editorial team · Tax-regime figures for FY 2025-26, statutory caps, and contribution rates checked against primary sources.
You read the bottom line, see a smaller number, and your stomach drops. But the bottom line hides the story. The honest answer is almost never “the company underpaid you”. It is “one deduction moved”. Let us find it.
Short on time? Jump to the error-detection checklist.
When take-home drops, gross usually stayed the same and a deduction rose. Find the changed line.
| Deduction | Who pays it | What it is | Why it can suddenly change |
|---|---|---|---|
| TDS (income tax) | All taxable employees | Tax deducted at source on salary | New financial year, a withdrawn investment declaration, a switch in tax regime, or back-loaded TDS late in the year |
| EPF (Provident Fund) | Most private employees | 12% of Basic + DA to your PF | A Basic or DA revision, or arrears raising the PF base |
| NPS | Govt staff (post-2004) and opt-in private | Pension contribution; central govt staff contribute 10% of Basic + DA | A pay revision or DA hike raising the contribution |
| Professional tax | Most states | A state tax on employment, capped at ₹2,500 a year | Often deducted in specific months, such as a larger February cut |
| GIS / CGEGIS | Government employees | Group insurance, part savings and part cover | A slab change on promotion |
| CGHS | Central govt employees | Health-scheme contribution | A pay-level change |
| Loan EMI / advance recovery | Anyone with a loan or advance | EMI, or recovery of a salary or festival advance | A new loan, or an advance recovery starting |
| LOP / leave without pay | Anyone short on leave | A pay cut for unpaid-leave days | You took leave beyond your balance |
| Society / union / misc. | Varies | Co-op society dues, union fees | New enrolment or revised dues |
| Component | Last month (₹) | This month (₹) |
|---|---|---|
| Basic + DA | 30,000 | 30,000 |
| HRA + allowances | 20,000 | 20,000 |
| Gross | 50,000 | 50,000 |
| EPF | 3,600 | 3,600 |
| Professional tax | 200 | 200 |
| TDS | 2,500 | 6,200 |
| Net take-home | 43,700 | 40,000 |
Here gross did not move. TDS rose by ₹3,700 because the investment declaration lapsed. The fix: submit proofs to HR. Excess TDS is adjusted later in the year or refunded when you file your return.
| Component | This month (₹) |
|---|---|
| Basic Pay | 44,900 |
| Dearness Allowance | ~24,700 |
| HRA + Transport | 18,000 |
| Gross | ~87,600 |
| NPS (10% of Basic + DA) | ~6,960 |
| CGHS | 650 |
| CGEGIS (GIS) | 90 |
| Professional tax (state) | 200 |
| Income tax (TDS) | varies |
| Net | gross minus the above |
Government slips carry NPS, CGHS and GIS that private slips do not. A sudden change here is usually a DA hike, a promotion slab change, or a GPF or advance recovery. Figures are illustrative; check your own pay level and the latest DA notification.
Put both payslips side by side and tick through:
If everything reconciles, it is a deduction change, not an error. If a number does not add up, or a deduction is unexplained, raise it with HR.
Your TDS depends heavily on whether you are on the old or new tax regime. For FY 2025-26 (AY 2026-27) the new regime is the default, with a basic exemption of ₹4 lakh and a ₹75,000 standard deduction. Thanks to the enhanced Section 87A rebate, income up to ₹12 lakh (and up to ₹12.75 lakh after the standard deduction) carries zero tax for a resident salaried individual. A regime switch alone can swing your monthly TDS by thousands. Confirm the current slabs against the latest Finance Act before assuming an error.
To: HR / Payroll Subject: Clarification on salary deduction for [Month Year], Emp ID [XXXX] Hi [Name], My take-home for [month] is Rs [amount], which is Rs [difference] lower than [previous month]. On comparing both payslips, the change appears in the "[exact line, e.g. TDS / LOP / Recovery]" line, which moved from Rs [old] to Rs [new]. Could you please share: 1. The basis of this deduction (calculation, leave ledger or regime). 2. Whether it is a one-time or a recurring change. 3. If it is a TDS change, my latest declaration status. I would appreciate a written reply by [date]. Thank you. [Name / Employee ID / Department]
Representative case: central-government clerk, Bhopal, Madhya Pradesh A 41-year-old saw her take-home fall by ₹3,100 one month with no warning. She compared payslips: gross was actually higher because a DA hike had kicked in, but so were NPS and income tax, and a ₹1,500 festival-advance recovery had started. Nothing was wrong; three changes simply landed in the same month. A two-line email to payroll confirmed the advance would finish in four instalments. A lower net can hide a higher gross, so always read the deductions, not just the bottom line.
Yes, if you are a government employee or work for a public-sector undertaking. You can file a Section 6(1) RTI with your own department or PSU asking for your pay-fixation statement, the basis of a specific deduction, your GPF or NPS ledger, or a recovery order. This is one of the most effective uses of RTI for employees, because the office must give a dated, signed answer in 30 days. Draft it with the AI RTI Drafter and track the deadline with the Timeline Tracker. Private-sector employees cannot use RTI against their employer, so raise it through HR; if salary or PF is being withheld, read how to complain to the Labour Department.
Because CTC and take-home are different. Your gross can be unchanged while a deduction rose, most often TDS, a new loan or advance recovery, or an unpaid-leave adjustment. Compare this month's payslip to last month's line by line; the changed deduction is your answer.
Common triggers are a new financial year, failing to submit investment proofs, a switch between old and new tax regimes, or the employer back-loading TDS in later months to meet the annual liability. Submit your declaration to HR; any excess TDS is adjusted later or refunded when you file your income-tax return.
Government slips usually include NPS (pension), CGHS (central-government health scheme) and GIS or CGEGIS (group insurance), plus GPF and any pay-advance recovery. Private slips mainly show EPF, professional tax, TDS and loan EMIs. A change in NPS or GIS usually follows a DA hike or a promotion.
Professional tax is a state levy on employment, capped at ₹2,500 a year under Article 276 of the Constitution. Many states collect it unevenly, with a larger cut in one month, often February, and smaller amounts otherwise. So a one-month spike in professional tax is usually normal, not an error.
No. Gross is everything you earn before deductions. Take-home, or net, is what reaches your bank after TDS, EPF or NPS, professional tax, insurance and any loan recovery. Take-home is always lower than gross, and it is the figure that changes when a deduction moves.
First confirm it is actually wrong using the checklist. Then email HR or payroll citing the exact line, both months' figures, and ask for the calculation basis with a deadline. Government employees can additionally file an RTI for the pay-fixation or recovery order. Keep all replies in writing.
Yes, an employer can recover a genuine excess payment, but it should inform you and recover it reasonably, usually in instalments, not in one shock deduction. Ask for the recovery basis in writing. Government employees can RTI the recovery order; private employees should check their appointment terms and raise it with HR.
That is a different problem. The money may be on hold or unsettled rather than deducted. Read salary credited but balance not updated to check available vs ledger balance and trace the hold.