AY 2026-27: Should Salaried Employees Lock Old or New Regime in FY 2025-26?

For salaried employees, the tax regime declared to the employer for FY 2025-26 usually drives TDS every month. That choice affects take home pay from April onward. The Income Tax Department may still allow certain taxpayers to compare old and new regimes at the time of filing the return for AY 2026-27, subject to conditions in the law and notifications for that year. Even when that flexibility exists, your monthly cash flow has already followed one path for twelve months, so the employer declaration should not be treated as a casual tick box.

How employers capture regime choice

Most large employers ask for regime selection in April or at joining. The choice is then wired into payroll software together with declarations under Form 12BB: rent paid, home loan interest, Chapter VI A deductions you intend to claim, and sometimes NPS employer contribution treatment. If you under declare deductions, TDS stays high and you may wait for a large refund after filing. If you over declare and fail to invest or produce proofs, January to March can bring sharp TDS spikes when the employer trues up.

Old regime: when the math still wins

The old regime allows deductions such as 80C (within the overall cap), 80D for health premiums, 80CCD(1B) for additional NPS, and significant housing loan interest for eligible self occupied or let out property, along with the traditional slab structure. For taxpayers with large, genuine deduction stacks (high home loan interest in early years, full family health cover, children's tuition within allowed limits, and consistent 80C use), the old regime can still produce lower total tax than the new regime on the same gross income. The only reliable test is a side by side calculation on projected full year numbers, not a WhatsApp forward.

New regime: simplicity and lower base slabs

The new regime offers fewer deductions but often lower headline slab rates for many income bands. It can suit young renters with minimal 80C discipline, single earners without a home loan, or those who find tracking proofs administratively costly. It also reduces the temptation to buy last minute tax saving products that do not match real goals.

Mid year switches and payroll pain

Switching regime mid year after changing jobs, or after an employer policy change, can create reconciliation issues between old Form 16 and new employer records. If you anticipate a job change, discuss regime continuity with HR before you sign the new offer components.

Documentation you should still keep

Even under the new regime, some components such as standard deduction on salary, employer NPS tier I contribution under 80CCD(2) where applicable, and certain other items may still appear on Form 16. Keep housing rent agreements and bank proofs if you later need them for HRA exemption under the old regime in another year or for landlord related records.

Conclusion

Before your employer closes the declaration window, model both regimes using projected March salary, expected bonuses, and full year deductions. Pick the regime that fits the numbers and your behaviour, not office gossip.

Nakotra Financial Advisor runs parallel old and new regime calculations on your actual payslip structure so the choice is numerical, documented, and easy to explain to HR.