A salary structure is more than a way of slicing up a number. How you break down an employee's cost to company into basic, allowances, and benefits determines their take-home pay, their provident fund corpus, their gratuity entitlement, their tax liability, and your statutory contribution costs as the employer. Get it right and everyone benefits — the employee optimises their tax and savings, and the company stays clean on compliance. Get it wrong and you either overpay statutory dues, expose the company to compliance risk, or leave the employee paying more tax than they needed to.
And as of late 2025, the rules of this game changed meaningfully, because the new Labour Codes introduced a uniform wage definition that constrains how salary structures can be built. So this guide covers both the fundamentals of salary structure design and the new constraints you now have to work within.
The anatomy of a salary structure
Most Indian salary structures are built from a familiar set of components. Understanding what each one does is the foundation for designing well.
Basic salary
Basic is the core, fixed component, and it is the anchor for almost everything else. PF is calculated on basic plus dearness allowance. Gratuity is calculated on basic plus DA. Many allowances are pegged as a percentage of basic. So basic is not just one line in the structure — it is the lever that moves PF, gratuity, and more. A higher basic means a larger PF corpus and higher gratuity, but also higher statutory deductions and therefore lower immediate take-home. A lower basic does the reverse. This trade-off is the central tension in structure design.
Dearness allowance
Dearness allowance is a cost-of-living component. In the private sector it is often folded into basic or kept nominal, but where it exists, it sits alongside basic for the purpose of PF and gratuity calculations. Under the new wage definition, basic and DA together form the core of "wages."
House Rent Allowance (HRA)
HRA is one of the most useful components for employees who pay rent, because part of it can be exempt from tax under the old tax regime. The exemption is the least of three amounts: the actual HRA received, the rent paid in excess of 10% of basic, or a percentage of basic (50% for metro cities, 40% for non-metros). HRA is typically set as a percentage of basic, often 40% or 50%. Note an important point for current planning: the HRA exemption is a feature of the old tax regime. Under the new tax regime, which is now the default, HRA exemption is not available, so the tax-saving value of HRA only applies to employees who have opted for the old regime.
Special allowance
Special allowance is usually the balancing figure — the amount left over after basic, HRA, and other defined components are set, to arrive at the target gross. It is fully taxable. Historically, companies loaded the special allowance to keep basic low and reduce PF. The new wage definition specifically curtails this, as we will see.
Other common components
Beyond these, structures often include conveyance or transport allowance, leave travel allowance (LTA, which can offer a tax exemption under the old regime for actual travel, subject to conditions), a flexible benefits or reimbursement portion covering things like fuel, telephone, or meal benefits, and an employer PF contribution that is part of CTC. Bonus and variable pay typically sit separately from the fixed monthly structure.
How each component is taxed
The tax treatment is what makes structure design worthwhile, particularly for old-regime employees.
Basic, dearness allowance, and special allowance are fully taxable. HRA can be partly exempt for those paying rent under the old regime. LTA can be exempt for actual travel under the old regime, subject to conditions and frequency limits. Certain reimbursements and benefits within a flexible benefits plan can be tax-advantaged when supported by bills, again largely under the old regime framework. The employer's PF contribution is not taxed as income in the employee's hands within limits, and it builds their retirement corpus.
The critical planning point for 2026 is the regime split. Most of the tax-saving levers in a salary structure — HRA exemption, LTA, 80C-linked components — only deliver value under the old tax regime. Under the new regime, which applies by default, the structure has far less impact on tax because the exemptions are stripped away and a flat standard deduction of ₹75,000 applies instead. So the value of an intricately optimised structure now depends heavily on which regime the employee is on. For a new-regime employee, structure design is mostly about compliance and PF/gratuity outcomes rather than tax saving.
The new constraint — the 50% wage rule
This is the part that changes how structures must be built going forward.
With the Labour Codes effective from 21 November 2025, a uniform definition of "wages" now applies for calculating PF, gratuity, ESI, statutory bonus, leave encashment, and overtime. The defining rule: basic plus dearness allowance — the "wages" components — must constitute at least 50% of an employee's total remuneration. If the excluded components (allowances and the like) exceed 50% of total pay, the excess is added back into wages for statutory calculation.
In plain terms, you can no longer keep basic at, say, 30% of CTC and pile the rest into allowances to suppress PF. The wage base must be at least half of total remuneration. A structure with basic below that threshold either needs restructuring, or the statutory calculations will treat the wage base as if it were 50% anyway.
The practical impact
Consider a structure built the old way: on a CTC of ₹50,000 a month, basic set at ₹15,000 (30%) with the remaining ₹35,000 spread across allowances. Under the new rule, the wage base for PF and gratuity has to be lifted to at least ₹25,000 (50%). PF, being 12% of the wage base, rises accordingly, and gratuity entitlement grows because it too is calculated on the higher basic plus DA.
The visible result for the employee is a dip in monthly take-home, because more money is being routed into PF rather than paid as cash allowance — even though total CTC is unchanged. The employee is not poorer; they are accumulating more in retirement savings and building a larger gratuity entitlement. For the employer, statutory contribution costs can rise, and every existing salary structure needs to be checked against the new threshold.
What this means for new structures
When designing a salary structure today, start from the 50% rule rather than trying to minimise basic. Set basic plus DA at a minimum of 50% of total remuneration. Build HRA and other components around that, keeping in mind that their tax value now depends on the employee's regime choice. Treat the structure primarily as a compliance-and-benefits exercise for new-regime employees, and additionally as a tax-optimisation exercise for old-regime employees.
A worked structure
Here is how a compliant structure might look on a monthly CTC of ₹1,00,000, built to respect the 50% rule.
Basic could be set at ₹50,000 (50% of CTC), satisfying the wage definition. HRA at 40% of basic would be ₹20,000. A flexible benefits or special allowance portion would make up a further chunk, say ₹20,000. The employer PF contribution (part of CTC) of around ₹6,000 and other components like gratuity provision would account for the rest, bringing the total to the ₹1,00,000 CTC.
The employee's PF is now calculated on a healthy basic, their gratuity accrues on the same, and an old-regime employee can still claim HRA exemption if they pay rent. A new-regime employee gets the standard deduction instead and a compliant structure underneath. The exact split would be tuned to the employee's regime, rent situation, and the company's policy, but the ₹50,000 basic anchors the whole thing in compliance.
Common mistakes in salary structure design
Several errors are worth avoiding.
Building new structures with a low basic to minimise PF — this no longer works under the 50% wage rule and creates compliance exposure.
Designing an elaborately tax-optimised structure for an employee who is on the new regime, where most of those exemptions do not apply, and so the complexity delivers no benefit.
Forgetting that the HRA exemption and LTA benefit are old-regime features, and over-promising their tax value to new-regime employees.
Not revisiting the entire salary structure framework after the Labour Codes came into force, leaving older structures non-compliant.
Treating the structure as fixed when an employee changes regime, since the optimal structure genuinely differs between the two regimes.
Why structure design and payroll belong together
The reason salary structures cause downstream pain is that the structure is the input to everything — PF, ESI, gratuity, TDS, take-home — and when the structure lives separately from the engine that computes all of those, every change has to be propagated by hand. Change the basic and someone has to remember to recompute PF, re-check the 50% rule, redo the gratuity provision, and re-run the TDS projection.
When salary structures and payroll sit on a single database, the structure is not a document that feeds the engine — it is part of the engine. Adjust a component, and PF, ESI, gratuity, and TDS recompute off the new structure immediately, with the 50% wage rule applied consistently. A regime change re-optimises the relevant calculations without re-keying. Because there is no separate structure file to reconcile against payroll, the numbers stay coherent. This is exactly how Helion is built — the salary structure and the payroll engine are the same system, so a compliant structure produces compliant payroll automatically rather than through careful manual checking.
For a company that hires across roles, levels, and states, having the structure and the calculation be one system removes a whole layer of error.
This guide reflects the position as of 2026, including the four Labour Codes effective from 21 November 2025 and the new Income Tax Act, 2025 regime framework for FY 2026–27. The detailed scope of the wage definition continues to settle, and tax treatment depends on the employee's regime. This is general information for employers, not a substitute for advice from a qualified professional on your specific salary structures.