Income Tax Slabs 2026: New vs Old Regime Rates (Simple Guide)

Every earning person in India is taxed using income tax slabs: bands of income, each charged at a rising rate. Understanding the slabs matters because the same salary can attract very different tax under the two regimes now on offer, and picking the wrong one quietly costs you money every year.

This guide explains the slab system for FY 2025-26 (assessment year 2026-27) in plain language: how the new and old regimes differ, the standard deduction and the Section 87A rebate, and a simple way to decide which regime saves you more. Because the exact band limits change in most Budgets, treat the structure below as the framework and confirm the current numbers on the income tax e-filing portal before you compute.

How the slab system works

India uses a progressive system. Your income is split into bands, and each band is taxed at its own rate. Only the money that falls inside a higher band is taxed at the higher rate, not your whole income. So moving into a higher slab never reduces your take-home pay overall; only the extra rupees above the threshold are taxed more. A health and education cess is then added on top of the tax you compute.

The two regimes, side by side

Since a few years ago you can choose between two regimes each year:

The new regime is now the default. It has more slabs and lower headline rates, a larger tax-free band at the bottom, and a more generous Section 87A rebate, so many small and middle earners pay little or nothing. The trade-off is that it strips out almost all deductions and exemptions. Salaried people still get the standard deduction, but 80C, HRA, home loan interest and most others are gone.

The old regime keeps higher rates but lets you reduce your taxable income with the familiar deductions: 80C investments, home loan interest under Section 24, HRA, 80D medical premiums, education loan interest and more. If you genuinely use these, the old regime can still beat the new one.

The standard deduction

The standard deduction is a flat amount taken off salary or pension income with no bills required. It is available under both regimes for salaried employees and pensioners at the amount notified for the year. For business and professional income there is no standard deduction; you subtract your real expenses instead, which is where good bookkeeping pays for itself.

The Section 87A rebate

The rebate under Section 87A is what makes tax genuinely zero for many people. If a resident individual's taxable income is at or below the threshold set for the year, the rebate cancels the tax so nothing is payable. The threshold is higher under the new regime, which is the main reason it works out cheaper for a large share of salaried earners and small proprietors.

How to decide which regime to pick

There is only one honest way to choose: calculate your tax both ways using your own numbers. Add up the deductions you actually claim, not the ones you theoretically could. Then:

• If your eligible deductions are small (you rent modestly, have no home loan, and invest little), the new regime almost always wins.
• If you have a home loan, pay high rent with HRA, and fully use 80C and 80D, run the old-regime numbers because it may still be cheaper.
• Salaried employees can switch regime each year at filing; those with business income have tighter rules on switching, so choose carefully.

A worked example (illustrative)

Suppose a shop owner earns a taxable profit after expenses. Under the new regime she applies the lower slab rates and the standard deduction does not apply to her business income, but the wider tax-free band and rebate keep her bill low. Under the old regime she could deduct her 80C investments and any home loan interest, lowering taxable income but at higher rates. Whichever produces the smaller final figure, including cess, is the one to elect. The point of the example is not a specific rupee answer, which changes every year, but the habit of computing both.

Keep the records that make tax easy

Whichever regime you pick, tax time is far simpler when your income and expenses are already recorded through the year. If every sale is a proper GST invoice and every expense is logged, your taxable income almost calculates itself, and advance tax estimates stop being guesswork.

Income tax slabs look intimidating but reduce to a simple idea: bands taxed at rising rates, with two regimes to choose from. Learn your real deductions, compute both ways once a year, and keep clean records so the numbers are ready when you need them.