Treasury Bills Income Tax 2026: TDS, Interest & Investor Guide

What Happened?

The Reserve Bank of India has announced an auction of Government of India Treasury Bills totaling ₹23,000 crore across three maturity periods on October 14, 2026. The auction includes ₹8,000 crore each for 91-day and 182-day bills, and ₹7,000 crore for 364-day bills. Individual retail investors can now participate directly through both competitive and non-competitive bidding, with retail allocation capped at 5% of the notified amount. Settlement will occur on October 15, 2026, making this a significant opportunity for conservative investors seeking government-backed securities with specific tax treatment under Income Tax Act 2025.

Background & Legal Context

Treasury Bills are short-term debt instruments issued by the Government of India and are highly rated for safety. From an income tax perspective, T-Bill investments have a distinct legal treatment that differs from other fixed-income securities.

Tax Treatment Under Income Tax Act 2025

• Nature of Income: T-Bill interest income is classified as "Income from Other Sources" under Section 56 of the Income Tax Act 2025 (corresponding to old Section 56 of 1961 Act). The discount at which T-Bills are purchased effectively represents interest income for tax purposes.
• TDS Provisions: Under Section 193 of the Income Tax Act 2025, TDS at the rate of 10% is applicable on interest income earned from Government securities, including Treasury Bills. However, if you have submitted a valid PAN and your income is below the taxable limit, you may claim TDS exemption by filing Form 15G (for individuals) or Form 15H (for senior citizens) before receiving the interest.
• Maturity Benefit: When the T-Bill matures, you receive the face value. The difference between the face value and the purchase price constitutes interest income and is taxable in the financial year of maturity under Section 56.
• Securities Transaction Tax (STT): While STT applies to equity transactions, Government securities including T-Bills are generally exempt from STT, providing a cost advantage compared to equity investments.

Applicability for Assessment Year 2026-27

Since these T-Bills are being auctioned in October 2026 (FY 2026-27), interest accrued or received during the financial year 2026-27 will be assessed in Assessment Year 2027-28. If the T-Bill maturity extends into FY 2027-28 (as is the case with 364-day bills), interest income will be taxed when it becomes due or is received, whichever is earlier.

What Does This Mean for You?

As an individual investor in this T-Bill auction, several important income tax implications apply to your investment decision:

1. Income Tax Slab Impact

Interest earned from T-Bills is added to your total income and taxed at your applicable slab rate (10%, 20%, 30%, etc.). Unlike dividend income or capital gains from long-term investments, T-Bill interest does not enjoy any preferential tax rate. This makes them less attractive for high-income earners but suitable for individuals in lower tax brackets or senior citizens who pay lower tax.

2. TDS Compliance Obligations

If you do not file Form 15G/15H, a 10% TDS will be deducted from the interest you receive. For a ₹1,00,000 investment yielding approximately ₹2,000-₹3,000 as interest (depending on the tenor), you would lose ₹200-₹300 to TDS. However, if your total income is below the basic exemption limit (₹2.5 lakh for individuals for AY 2026-27), you can claim a complete TDS refund in your income tax return or avoid TDS altogether by submitting Form 15G before maturity.

3. Long-Term Capital Gains Treatment — NOT Applicable

A common misconception among investors is that holding T-Bills for longer periods qualifies them for long-term capital gains treatment. This is not correct. T-Bills are not subject to capital gains tax at all—only the interest income is taxable. There is no "holding period" benefit. Whether you hold the T-Bill for 91 days or sell it after one day in the secondary market, the interest component is taxed as ordinary income.

4. Retail Investor Restrictions

Your maximum allocation as a retail investor is restricted to 5% of the notified amount (approximately ₹1,150 crore divided among all retail participants). In practical terms, you can typically invest up to ₹1-₹5 lakh per auction depending on demand. This cap is a compliance rule, not a tax rule, but it limits your investment exposure.

5. GST — Not Applicable

GST does not apply to T-Bill transactions or interest income. This is one advantage—you receive the full interest without any indirect tax burden. Government securities are exempted under Section 5(1)(zzzeee) of the CGST Act 2017.

What Should You Do Now?

Before Bidding (October 14, 2026)

• Assess Your Tax Bracket: Estimate your taxable income for FY 2026-27 to determine your applicable tax rate. If you fall in the nil or 10% bracket, T-Bills are more attractive after-tax returns.
• Decide on TDS Exemption: If your total income will be below ₹2.5 lakh, decide whether to file Form 15G to avoid 10% TDS. Consult with an accountant or CA to estimate your FY 2026-27 income accurately.
• Register on RBI Portal: If participating as a retail investor, register on the official Retail Direct portal to place bids electronically.
• Determine Investment Quantum: Decide how much to invest (minimum typically ₹10,000-₹25,000 depending on RBI norms). Ensure funds are available for settlement on October 15, 2026.

After Winning the Bid (October 15 onwards)

• Maintain Proof of Investment: Keep auction confirmation, allotment letter, and payment proof. These are required for your investment records and income tax filing.
• File Form 15G if Eligible: If your taxable income is below the basic exemption limit, file Form 15G before maturity to claim TDS exemption. Without this form, 10% TDS will be deducted automatically.
• Track Maturity Dates: Note the maturity dates (January 14, 2027 for 91-day; April 14, 2027 for 182-day; October 14, 2027 for 364-day bills). Plan your cashflow accordingly.
• Report Interest in Income Tax Return: When filing your ITR for the financial year in which interest accrues/is received, report it under "Income from Other Sources" (Section 56). Do not omit this—it is easily traceable to RBI records.
• Claim TDS Credit: If TDS was deducted, claim the TDS credit in your income tax return to avoid double taxation. This credit reduces your tax liability rupee-for-rupee.

For Senior Citizens

If you are above 60 years, you have a higher basic exemption limit (₹3 lakh for AY 2026-27). Consider filing Form 15H instead of Form 15G to claim TDS exemption if your income is below this limit. This is a tax-efficient strategy for senior citizen investors.

Key Takeaways

• TDS at 10% applies by default: Interest from Treasury Bills attracts 10% TDS unless you file Form 15G/15H to claim exemption under the Income Tax Act 2025.
• Interest is taxable income, not capital gains: All T-Bill interest is taxed as ordinary income under Section 56 at your applicable slab rate—there is no preferential rate or holding period benefit.
• TDS exemption is available if income is below basic exemption: For AY 2026-27, if your total income is below ₹2.5 lakh (or ₹3 lakh for seniors), you can avoid TDS by filing Form 15G/15H before maturity.
• GST does not apply: T-Bill investments and interest are exempt from GST—you receive the full interest amount.
• Compliance is mandatory: Report all T-Bill interest in your ITR under "Income from Other Sources" and claim TDS credit. Non-disclosure attracts penalties and interest under Section 270A of the Income Tax Act 2025.

Final Word: Treasury Bills are a safe, government-backed investment vehicle. However, they are not tax-free. Proper tax planning, TDS exemption filing where eligible, and accurate reporting in your ITR are essential to maximize your after-tax returns. If you are in the 30% tax bracket, an effective yield of 6% becomes only 4.2% after tax—which should factor into your investment decision.

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