Published on August 08, 2026 • Last updated August 08, 2026
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An income tax slab is a range of income taxed at a specific rate under a progressive tax system, where higher portions of income are taxed at higher rates.
Most income tax systems, including India's, don't tax your entire income at a single flat rate. Instead, income is divided into ranges called "slabs," with a different rate applied to each slab — a progressive tax system, where people with higher incomes pay a higher rate on the portion of their income that falls into higher brackets. Here's the detail that trips people up: moving into a higher tax slab does not mean your entire income is taxed at that higher rate — only the portion within each slab is taxed at that slab's rate, and the rest continues to be taxed at the lower rates below it.
Your final tax liability is calculated by working through each slab, applying the relevant rate, and adding up the tax owed at each level. From that total, further adjustments apply — deductions (like Section 80C investments or HRA exemptions) reduce taxable income before slab rates are applied, while rebates (like Section 87A) can reduce the final tax bill at lower income levels. Many countries, including India, also offer a choice between tax regimes — for example, an "old regime" with more deductions but higher slab rates, versus a "new regime" with fewer deductions but lower rates — and the better choice depends on an individual's income and deduction profile.
Understanding slabs is essential for salary negotiation, tax planning, and choosing between available deductions and exemptions.
Learn how Income Tax Slab is calculated
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