Let’s start with a simple situation.
You get your first salary. Everything looks fine… until you notice tax has been deducted.
Naturally, you wonder: “How is this tax calculated?”
And the most common misunderstanding is this:
“If my income crosses a limit, will my entire salary be taxed at a higher rate?”
That is not how it works. In India, income is taxed in parts, not as a single block.
What exactly are income tax slabs and how do they work?
Think of your income like steps on a staircase. As your income increases, it moves step by step. Each step has a different tax rate. Only the part that reaches the next step gets taxed at a higher rate.
For example, if you earn ₹12 lakh:
- You don’t pay one single rate
- Your income is split into parts
- Each part is taxed differently
This system is called a progressive tax system, where tax increases gradually as income increases.
Two Tax Systems You Can Choose From
Now comes the part that usually confuses beginners.
In India, you don’t just have one system. You actually have two options:
- New Tax Regime
- Old Tax Regime
If you don’t choose anything while filing your return, the system automatically uses the new tax regime.
Understanding the New Tax Regime
Let’s first understand the simpler one.
The new tax regime was introduced to make tax calculation easy.
Here’s how it works in real life:
- Tax rates are lower
- But you don’t get many options to reduce your income
There is one important benefit though.
If you are a salaried employee, the government automatically reduces ₹75,000 from your salary before calculating tax. This is called standard deduction.
Many people choose this system because:
- They don’t want complicated calculations
- Their salary is straightforward
- They don’t invest much for tax saving
Understanding the Old Tax Regime
Now let’s talk about the older system.
At first glance, it looks worse because the tax rates are higher.
But here’s the important difference.
This system allows you to reduce your income using different expenses and investments.
For example, if you:
- Invest in LIC, PF, or ELSS
- Pay health insurance
- Pay house rent (HRA)
- Have a home loan
Then your taxable income can be reduced.
And when income reduces, tax also reduces.
Simple Way to Think
- New regime → lower rates, fewer adjustments
- Old regime → higher rates, but you can reduce income
In real life, people who actively invest or have expenses often still consider the old system.
What are the income tax slab rates under the new tax regime?
Let’s first see the new tax regime, because this is now the default system.
New Tax Regime Slabs (FY 2025–26)
| Income Range | Tax Rate | What it means |
|---|---|---|
| Up to ₹4 lakh | 0% | No tax on this portion |
| ₹4 lakh – ₹8 lakh | 5% | Small tax begins |
| ₹8 lakh – ₹12 lakh | 10% | Slightly higher tax |
| ₹12 lakh – ₹16 lakh | 15% | Moderate tax |
| ₹16 lakh – ₹20 lakh | 20% | Higher tax |
| ₹20 lakh – ₹24 lakh | 25% | Even higher tax |
| Above ₹24 lakh | 30% | Highest tax rate |
Important: These rates apply step-by-step, not on the full income.
Why is the new tax regime considered simpler?
In real life, many people prefer this system because it is straightforward.
Here’s what happens:
Before tax is calculated, ₹75,000 is reduced from your salary automatically.
After that:
- Slab rates are applied
- Very few adjustments are allowed
You usually cannot claim:
- investment deductions (like 80C)
- HRA
- health insurance
So calculation becomes simple.
That’s why people with straightforward salaries often choose this.
Can income up to ₹12 lakh really become tax-free in the new regime?
Yes, in many cases.
This happens because of something called Section 87A rebate.
Here’s how it works in real life:
Suppose your taxable income becomes around ₹11 lakh.
Your tax may come to ₹50,000.
Then the rebate reduces this ₹50,000 to zero.
Final tax becomes zero.
That’s why people say:
“Income up to around ₹12 lakh can become tax-free”
What are the income tax slab rates under the old tax regime?
Now let’s look at the older system.
Old Tax Regime Slabs (Below 60 Years)
| Income Range | Tax Rate | What it means |
|---|---|---|
| Up to ₹2.5 lakh | 0% | No tax |
| ₹2.5 lakh – ₹5 lakh | 5% | Small tax begins |
| ₹5 lakh – ₹10 lakh | 20% | Higher tax |
| Above ₹10 lakh | 30% | Highest tax rate |
Compared to the new regime, this has fewer slabs but bigger jumps.
Why do people still use the old tax regime?
Because this system allows you to reduce your income before tax is calculated.
For example, you can claim:
- investments (Section 80C)
- health insurance (80D)
- HRA
- home loan interest
Also, ₹50,000 is reduced as standard deduction.
So even though rates are higher, your taxable income becomes lower.
Can income up to ₹5 lakh become tax-free in the old regime?
Yes.
If your income after deductions becomes ₹5 lakh or less, then the rebate removes your tax completely.
Final tax becomes zero.
What is the difference between deduction and rebate?
This is where many beginners get confused.
- A deduction reduces your income before tax
- A rebate reduces your final tax after calculation
In simple terms:
- Deduction works first
- Rebate works at the end
Both reduce tax, but at different stages.
What extra taxes are added apart from slab rates?
Even after calculating tax, two additional things may apply.
Even after calculating tax, two additional things may apply.
- health and education cess
- surcharge
What is health and education cess?
After your tax is calculated, 4% extra is added.
This applies to everyone.
What is surcharge and when does it apply?
If income becomes very high (above ₹50 lakh), an extra tax is added on your tax amount.
For example:
| Income Level | Extra Tax (Surcharge) |
|---|---|
| Up to ₹50 lakh | No surcharge |
| ₹50 lakh – ₹1 crore | 10% |
| ₹1 crore – ₹2 crore | 15% |
| ₹2 crore – ₹5 crore | 25% |
| Above ₹5 crore | Up to 37% (old), 25% (new) |
Most beginners don’t encounter this early.
Do tax slabs change for senior citizens or different taxpayers?
Yes, but only in the old regime.
Senior Citizens (60–80 years)
| Income Range | Tax Rate |
|---|---|
| Up to ₹3 lakh | 0% |
| ₹3 lakh – ₹5 lakh | 5% |
| ₹5 lakh – ₹10 lakh | 20% |
| Above ₹10 lakh | 30% |
Super Senior Citizens (80+)
| Income Range | Tax Rate |
|---|---|
| Up to ₹5 lakh | 0% |
| ₹5 lakh – ₹10 lakh | 20% |
| Above ₹10 lakh | 30% |
The new regime does not give this extra benefit.
Also:
- Men and women → same tax rates
- NRIs → can choose regime but with some conditions
- HUF → same slab rates apply
Are all types of income taxed using slab rates?
No.
Some types of income are taxed at fixed rates.
| Income Type | Tax Rate |
|---|---|
| Short-term share gains | 20% |
| Long-term gains | 12.5% |
| Lottery winnings | 30% |
| Crypto income | 30% |
These are taxed at fixed rates instead of slab rates. That’s why sometimes your total tax doesn’t match your expectations.
Which tax regime usually works better?
There is no one-size answer.
But in practice:
- If you have fewer deductions → new regime often works better
- If you claim many deductions → old regime may be better
Most people calculate both before filing.
How is income tax actually calculated step by step?
In real life, tax calculation follows this flow:
- First, all income is added.
- Then deductions are reduced.
- Then taxable income is calculated.
- Then slab rates are applied.
- Then rebate is applied if eligible.
- Then 4% cess is added.
- Then TDS or advance tax is adjusted.
Final result:
- You either pay tax
- Or get a refund
What is the last date to file an income tax return for FY 2025–26?
For most individuals: Due date is 31 July 2026
Filing late may lead to extra fees and interest.
Can you switch between tax regimes every year?
If you are salaried: Yes, you can choose every year. If you have business income: Switching is restricted.
What happens if tax is already deducted from salary?
Employers deduct TDS every month. When you file your return: This amount is adjusted against your final tax.
Will income tax slabs change for FY 2026–27?
No.
There are no changes.
- Same slab rates continue
- New regime remains default
- Same rules apply
Old vs New Regime Comparison Table
| Feature | New Regime | Old Regime |
|---|---|---|
| Tax Rates | Lower | Higher |
| Deductions | Limited | Many |
| Complexity | Simple | Complex |
| Best For | Salaried (low deductions) | Investors |
Final Thought
If you remember just three things:
- Income is taxed in parts
- You can choose between two systems
- Final tax depends on deductions and rebate
And one practical habit: Always calculate tax in both regimes before filing
That alone solves most confusion.
Summary: Income Tax FY 2025–26 (AY 2026–27)
| Topic | Key Takeaway |
|---|---|
| Tax System | India follows a progressive tax system – income is taxed in parts, not as a whole |
| Available Regimes | Two options: New Tax Regime (default) and Old Tax Regime |
| Default Regime | New regime is automatically selected if you don’t choose |
| Standard Deduction | New: ₹75,000Old: ₹50,000 |
| Rebate (87A) | New: Up to ₹12 lakh → Zero taxOld: Up to ₹5 lakh → Zero tax |
| New Regime Benefit | Lower tax rates, simple calculation, fewer deductions |
| Old Regime Benefit | Higher rates, but allows deductions to reduce taxable income |
| Deductions (Old Regime) | 80C (PF, ELSS, LIC), 80D (insurance), HRA, home loan interest |
| Deductions (New Regime) | Limited: Standard deduction, employer NPS (80CCD(2)) |
| Best for New Regime | Salaried individuals with fewer investments or deductions |
| Best for Old Regime | People claiming multiple deductions and tax-saving investments |
| Slab Application | Tax is applied step-by-step, not on total income |
| Rebate vs Deduction | Deduction reduces income • Rebate reduces final tax |
| Cess | 4% Health & Education Cess applies to everyone |
| Surcharge | Applies if income exceeds ₹50 lakh |
| Special Tax Rates | Some incomes taxed separately (e.g., equity gains, lottery, crypto) |
| ITR Due Date | 31 July 2026 (for most individuals) |
| Switching Regime | Salaried: can switch every yearBusiness income: restricted |
| Decision Rule | Few deductions → New RegimeMany deductions → Old RegimeNot sure → Compare tax under both regime |
| Practical Tip | Always calculate tax under both regimes before filing |
