Old Tax Regime Slabs and Rebate

Rule summary · verified 2026-10-10

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What changed since last year

The official rate page lists AY 2026–27. The old-regime rebate threshold is distinct from surcharge marginal relief and from new-regime rebate rules.

In plain language

Use the correct age category and year; treat deductions, rebate, surcharge, and cess as separate calculation steps.

Use the matching age category and year

The old-regime rates on this page are scoped to the individual category specified in the official table for Assessment Year 2026–27. Age can change the basic exemption threshold, so do not apply the under-sixty schedule to a senior citizen without checking the relevant row. Match the assessment year to the income period and confirm residence status before using the table. The Department's tax-rate page and Finance Act material are linked as primary references. A rate summary may not include every special case that appears on a filed return.

Work through the progressive bands

Allocate taxable income in order, applying each percentage only to the amount within its band. The basic slab calculation is distinct from the standard deduction, eligible exemptions, Chapter VI-A deductions, rebate, surcharge, and cess. Keep those items as separate lines so a deduction is not accidentally counted twice. A taxable-income figure is not the same as gross salary or CTC. The return computation may include other income and adjustments not represented by a salary-only worksheet, so reconcile source documents before using a rate table to compare two regimes.

Keep Section 87A and surcharge relief apart

For the modeled old-regime resident individual, Section 87A rebate is available only when total income does not exceed ₹5 lakh; it is limited to income tax or ₹12,500, whichever is lower. The rebate does not receive surcharge marginal relief above that boundary. Surcharge relief addresses a different high-income calculation and must not be blended into the old-regime rebate. Consult the official Act and return validation rules for the selected assessment year, then calculate each relief in its correct order. If a tax tool combines them without showing the steps, ask which rule produced the result.

Check whether a deduction is actually eligible

Receipts alone do not establish that a deduction qualifies. Verify the taxpayer, payment date, eligible recipient, instrument, documentary evidence, cap, and regime restriction for each item. House rent, home-loan interest, insurance, education, and retirement contributions have different statutory conditions. The old regime can permit deductions that the alternative regime does not, but that does not make every claimed expense deductible. Keep one evidence folder and label each document with the section it may support. Use the official return guide to confirm the schedule rather than relying on a generic list circulated without a tax year.

Illustrative scenario: compare before electing

Illustrative scenario: an employee has rent receipts and investment evidence but also values simple withholding and has income from a fixed deposit. The employee computes the old-regime taxable amount only after checking which items qualify, then compares it with the new-regime result for the same year and income. The employee does not assume that a higher deduction total guarantees lower final tax, because rates and eligibility differ. They retain the underlying receipts and compare the return rules before making an election. This is a decision method, not a prediction of the employee's liability.

Know when a salary-only view is insufficient

The rate table does not cover every capital gain, business receipt, foreign income, loss set-off, deduction interaction, or residency question. It cannot decide whether an expenditure meets the law or whether a document is adequate evidence. If the return includes multiple heads of income or a disputed exemption, use the official e-filing tool and consult a qualified tax professional. Do not modify payroll declarations just to make this comparison's displayed totals match a desired outcome. Record the source version and date so a future calculation can be rebuilt using the same assumptions.

Model the old-regime rebate separately

For the general resident-individual example, Section 87A rebate is limited to tax or ₹12,500, whichever is lower, and is not available once total income exceeds ₹5 lakh. A senior citizen may have a different basic exemption threshold, but that does not automatically change the rebate boundary. The sequence matters: determine income, compute eligible tax, apply the qualifying rebate, and add cess according to the official order. Do not carry a marginal-relief rule from a surcharge calculation into the rebate. Keep the taxpayer category visible on any worksheet so the result cannot be mistaken for a universal rate.

Make deduction evidence traceable

Create a ledger with the claimed section, payer, beneficiary, transaction date, amount, permitted limit, proof location, and the regime in which it may be used. Match bank debits to receipts and verify that a premium or contribution belongs to the taxpayer claiming it. A declaration filed with an employer can influence withholding but is not final evidence that a return claim qualifies. Remove duplicate entries when a payment appears in both a salary declaration and a personal spreadsheet. Preserve rejected or corrected claims with a short explanation, because an audit trail should show why an attractive deduction was not used.

Questions to check

Does an old-regime rebate receive surcharge marginal relief?

Do not assume so. The rebate boundary and surcharge relief are separate rules with different thresholds.

Can every rent or investment payment be deducted?

No. Eligibility depends on the statutory condition, selected regime, year, and supporting evidence.

Official sources

• Income Tax Department: Tax Rates
• Income Tax Department: Highlights to Finance Act 2025