Income Tax Slabs FY 2026-27: Old Regime vs New Regime Comparison

The slab structure itself hasn't changed for FY 2026-27, but a surprising number of taxpayers are still filing under the wrong regime for their situation, simply because they defaulted into whichever one auto-populated on the portal. If you want the conceptual background on how the new regime works and why it was introduced, see our earlier guide on the new tax regime. This post focuses on the current FY 2026-27 numbers and a practical way to decide between the two.

New Tax Regime Slabs for FY 2026-27

Add applicable cess (4% Health and Education Cess) and surcharge for higher incomes. The Section 87A rebate wipes out tax liability entirely for taxable income up to Rs 12 lakh under this regime, and salaried individuals or pensioners get a flat Rs 75,000 standard deduction, which pushes the effective tax-free gross salary to roughly Rs 12.75 lakh.

Old Tax Regime Slabs for FY 2026-27

Senior citizens (60 to 80 years) get a higher basic exemption of Rs 3 lakh under the old regime, and super senior citizens (above 80 years) get Rs 5 lakh; the new regime's slabs are age-neutral and don't offer this. The old regime is where the familiar deductions live: Section 80C (up to Rs 1.5 lakh), home loan interest under Section 24(b), HRA exemption, 80D health insurance premium, and dozens of other provisions that the new regime largely strips out.

Old vs New: Side-by-Side Decision Framework

There is no single answer that fits everyone; the decision comes down to how much of your income is shielded by deductions you can genuinely claim. As a practical starting framework:

• Choose the new regime if: you have minimal deductions, no home loan, rent-free or company-provided accommodation, or you are early in your career with limited 80C investments. The lower rates and higher effective tax-free threshold usually win outright.
• Choose the old regime if: you have a home loan on a self-occupied property generating meaningful interest deduction, you pay significant rent and claim HRA, you max out 80C through PF/ELSS/life insurance, and you have health insurance premiums and other itemised deductions that collectively exceed roughly Rs 4 to 5 lakh.
• Run both calculations if you are close to the line. The crossover point depends heavily on individual circumstances (rent paid, city of residence for HRA, loan interest amount), so there is no fixed income level at which one regime universally wins.

Business and professional taxpayers should note that once they opt out of the new regime, their ability to switch back in future years is more restricted than for salaried individuals, who can choose afresh every year at the time of filing. This is worth factoring in before making a one-time exit from the new regime if your income mix might change.

A Worked Comparison

Consider a salaried individual with a Rs 15 lakh gross salary, a home loan with Rs 2 lakh annual interest, Rs 1.5 lakh in 80C investments, and Rs 25,000 in 80D premium. Under the old regime, after the standard deduction and these itemised deductions, taxable income comes down meaningfully, and the tax computed at old-regime slab rates on that lower base may work out close to, or even below, what the new regime charges on the higher unadjusted base despite its lower rates. This is exactly the kind of case that needs an actual calculation rather than a rule of thumb; a taxpayer with the same salary but no home loan and minimal 80C would land squarely in new-regime territory.

What Hasn't Changed

It is worth being explicit that Budget 2026 left both slab structures untouched from the prior year. If you were filing under a particular regime for FY 2025-26 and your income situation is largely similar this year, the same regime is likely to remain optimal, though it is still worth re-checking if your deduction profile has changed; for example, a new home loan, a marriage, or a jump in salary that changes which slab you land in.