The moment you hire your first employee, you've taken on a set of monthly obligations that don't pause, don't wait, and have real penalties when missed. Most small businesses manage the first two or three employees reasonably well. Problems usually start around five to eight employees, when the complexity crosses the point where a spreadsheet can handle it reliably.
Here's what that complexity actually looks like.
PF kicks in at 20 employees, but you should understand it earlier
Provident Fund registration is mandatory when you cross 20 employees. Both you and the employee contribute 12% of basic wages. Of your 12%, most goes to the EPF account and a portion goes to the Employee Pension Scheme.
The key thing to understand: PF is on basic wages, not gross salary. If an employee earns ₹30,000 gross but their basic is ₹14,000, PF is calculated on ₹14,000. This is why salary structure decisions — how you split CTC between basic, HRA, and allowances — have real cost implications for both you and the employee.
PF challan is due by the 15th of the following month. Late payment attracts interest at 12% per annum. It adds up quickly if you're running behind.
ESI applies until employees cross ₹21,000 gross
ESI is mandatory if you have 10 or more employees (in most states) and those employees earn up to ₹21,000 per month gross. You contribute 3.25% of gross wages; they contribute 0.75%.
Employees who get salary increments above ₹21,000 exit ESI coverage — but only from the start of the next ESI contribution period, not immediately. Your payroll system should track this transition automatically so you don't keep deducting after eligibility ends.
ESI deadline is also the 15th of the following month, same as PF.
TDS on salary is a year-long calculation
When an employee joins, collect Form 12BB from them — this is their declaration of planned investments and deductions for the year (Section 80C, HRA, home loan interest, etc.). You use this to estimate their annual taxable income and calculate how much TDS to deduct monthly.
You're deducting 1/12th of the annual liability each month. If an employee's investments fall short of what they declared, their TDS in the last quarter increases to compensate. If you don't adjust for this, they end up with a large tax shortfall when they file their ITR, and they'll blame you for not deducting correctly.
Deposit TDS by the 7th of the following month. File Form 24Q quarterly. Issue Form 16 to every employee by May 31st. Missing any of these creates penalties — on the business, not on the employee.
Professional Tax is a state-level thing
PT rates and slabs vary by state. Karnataka, Maharashtra, Tamil Nadu, West Bengal all have it at different thresholds and amounts. The maximum across any state is ₹2,500 per year per employee. You deduct it from the employee's salary and remit to the state government.
If you operate across states, each state has its own registration and filing requirement. It's minor in amount but the compliance is separate from everything else.
The practical point
Once you're at 10 or more employees, manual spreadsheet payroll becomes a liability. One wrong formula, one missed TDS adjustment, one late challan — these create problems that aren't proportional to the error. Payroll software that integrates with your accounting system handles the calculations, generates the challans, and keeps the compliance calendar. The investment pays for itself in the first month you don't spend a weekend fixing a payroll error.
