Understanding Income Tax Slabs in India

India uses a slab system — different portions of your income are taxed at different rates, rather than one flat rate on your entire income. Higher income doesn't mean your whole salary is taxed at the top rate; only the portion within each slab is.

Progressive system

Each slab of income is taxed at its own rate — not your entire income at the top rate

Two regimes

Choose Old (more deductions) or New (lower rates) — whichever is cheaper for you

Choose every year

Salaried individuals can typically switch their regime choice each financial year

How "Only the Slab Portion" Actually Works

Imagine slabs are like buckets stacked on top of each other. Your income fills the first bucket completely before spilling into the next — and each bucket has its own tax rate. Only the amount that lands in a higher bucket gets taxed at that bucket's rate.

Why this matters

A ₹1 lakh raise that pushes you into a higher slab does NOT mean your entire income now gets taxed at that higher rate — only that extra ₹1 lakh does

Old Regime vs New Regime

The core trade-off you're choosing between every year.

Feature	Old Regime	New Regime
Slab rates	Higher	Lower
Deductions (80C, HRA, etc.)	Allowed	Mostly not allowed
Filing complexity	More paperwork to claim deductions	Simpler
Best suited for	Large deduction claims (home loan, 80C, HRA)	Few or no deductions claimed

💡 There's no universal "better" regime — it depends entirely on how much you claim in deductions. Run the numbers under both before filing each year, rather than assuming last year's choice still holds.

Why Knowing Your Slab Actually Helps

Estimating a bonus's real value

Knowing your marginal slab rate tells you exactly how much of a bonus or hike actually lands in your pocket versus going to tax.

Deciding if deductions are worth it

If your marginal rate is low, the paperwork for claiming deductions (only under Old Regime) may not be worth the effort compared to the New Regime's simplicity.

Frequently Asked Questions

What is a "marginal tax rate"?⌄

It's the tax rate applied to your next rupee of income — i.e., the rate of the highest slab you currently fall into. It's different from your "effective" tax rate, which is your total tax divided by total income, and is usually lower than your marginal rate.

Can I switch tax regimes every year?⌄

Salaried individuals with no business income can typically switch between Old and New regime every financial year when filing. Those with business or professional income face some restrictions on how often they can switch back.

Is there a basic exemption limit where no tax is owed?⌄

Yes — both regimes have a basic exemption limit below which no income tax is owed, and the New Regime additionally offers a rebate that can bring the effective tax to zero up to a higher income threshold. These limits are revised periodically, so check the current year's figures before estimating your liability.

Do freelancers and business owners use the same slabs?⌄

The same slab rates generally apply, but freelancers and business owners often have additional considerations — like presumptive taxation schemes, advance tax obligations, and different rules around switching between tax regimes each year.