Treasury Bills Investment Tax Guide 2026 — Income Tax Impact

What Happened?

The RBI successfully conducted a Treasury Bills auction on September 16, 2026, offering three tenures: 91-day (₹9,000 crore notified), 182-day (₹8,000 crore notified), and 364-day (₹7,000 crore notified). The auction received strong competitive bids totaling ₹56,466.25 crore across all three categories, demonstrating robust investor confidence. Weighted Average Yield (WAY) ranged from 5.27% (91-day) to 6.01% (364-day), reflecting current market interest rates and monetary policy stance.

Background & Legal Context

Treasury Bills are short-term debt instruments issued by the Government of India, and they enjoy a unique tax status under the Income Tax Act, 2025. As an investor or financial institution purchasing T-Bills, you must understand several critical tax implications:

• Nature of Income: Under Section 194A of the Income Tax Act 2025 (previously Section 194A of IT Act 1961), interest income earned on T-Bills is treated as income from other sources. However, T-Bills are special because they are issued at a discount and redeemed at face value — the difference constitutes the interest income.
• TDS on T-Bills: If you purchase T-Bills through a bank or authorized dealer, TDS (Tax Deducted at Source) is applicable at 10% on the interest income for individuals and HUFs, as per Section 194A. However, if the total interest income is below the basic exemption limit, you can file Form 15G or 15H to avoid TDS deduction.
• Capital Gains Treatment: If you sell T-Bills before maturity in the secondary market, the difference between sale price and purchase price is treated as capital gains. This is crucial for AY 2026-27 planning. Short-term capital gains (held for less than 12 months) are taxed as per your income slab. Long-term capital gains (held for 12 months or more) attract 20% tax with indexation benefit under Section 112 of the IT Act 2025.
• Section 80TTA Benefit: Individual investors earning interest income on T-Bills and other specified securities can claim a deduction of up to ₹10,000 per financial year under Section 80TTA of the IT Act 2025. This applies to senior citizens and individuals alike, subject to income limits.
• Non-Resident Status: Non-resident investors (NRIs) investing in T-Bills face different TDS rates and tax treatment. Interest income is taxed at 20% TDS (or treaty rate if applicable) under Section 194A, and they must file ITR even if income is below basic exemption.

GST Implications: Treasury Bills are financial instruments and GST is not applicable on the interest income or capital gains earned. However, if financial advisors charge fees for recommending T-Bill investments, GST may apply on those advisory fees at 18% under GST law.

What Does This Mean for You?

Based on the September 2026 auction results, here are the practical implications for different categories of investors:

• For Individual Investors: If you purchased T-Bills through banks at the cut-off prices shown in the auction (98.7007 for 91-day, 97.2128 for 182-day, 94.3200 for 364-day), your interest income will be subject to TDS at 10% unless you submit Form 15G/15H. For AY 2026-27, you must report this interest income in Schedule OI (Other Income) of your ITR. Remember to claim the ₹10,000 deduction under Section 80TTA if eligible.
• For Senior Citizens: Senior citizens also get the ₹10,000 deduction under Section 80TTA. Additionally, if your total income is within the slab but interest income is below ₹50,000, you can avoid TDS by filing Form 15H.
• For HUF (Hindu Undivided Family): HUFs are treated as individuals for TDS purposes and similarly enjoy the ₹10,000 Section 80TTA deduction. However, HUF income is not aggregated with individual members' income.
• For Corporate Investors: Companies and partnerships purchasing T-Bills will have TDS deducted at 10% on interest, but this is adjustable against their tax liability. For corporate entities, the weighted average yield of 5.27-6.01% provides a known return for cash management. The interest income is taxable under normal provisions without Section 80TTA benefit.
• For Financial Institutions: Banks, mutual funds, and other FIs bidding in the competitive segment (as shown by the 82, 76, and 103 bids received) must account for interest income and any trading gains/losses in their financial statements and tax filings. Unrealized losses cannot be claimed; only realized losses from secondary market sales are deductible.
• For Secondary Market Sales: If you sell T-Bills before maturity in the secondary market (RBI Retail Direct platform or through banks), the capital gain calculation is crucial. Calculate your cost of acquisition, deduct it from the sale proceeds, and classify the gain as short-term or long-term based on your holding period. Short-term gains add to your income tax slab; long-term gains are taxed at 20% with indexation.

Impact on Wealth Tax (if applicable): From AY 2025-26 onwards, under certain proposals, wealth components including financial securities may have reporting requirements. While T-Bills themselves are not yet subject to wealth tax in India, maintaining clear records is essential for compliance.

What Should You Do Now?

• Step 1 — Check Your TDS Eligibility: If your total income (including T-Bill interest) is below ₹5 lakh (individual/HUF) or ₹6.5 lakh (senior citizen) for FY 2025-26, file Form 15G/15H with your bank before or at the time of T-Bill purchase to avoid TDS deduction.
• Step 2 — Maintain Investment Records: Keep clear documentation of: (a) Purchase date, (b) Purchase price/cost of acquisition, (c) Auction price if purchased at auction, (d) TDS certificate (Form 16A) from the bank, (e) Sale date and price (if sold before maturity), and (f) Maturity date and redemption amount.
• Step 3 — Plan Your ITR Filing: For AY 2026-27 (FY 2025-26), note that interest income from the auction conducted on September 16, 2026, will be part of your FY 2026-27 income and will need to be reported in AY 2027-28. Mark this on your calendar and set reminders.
• Step 4 — Claim Section 80TTA Deduction: If eligible, ensure you claim the ₹10,000 deduction under Section 80TTA in Schedule EI of your ITR. This directly reduces your taxable income.
• Step 5 — Review Capital Gains Strategy: If you plan to trade T-Bills in the secondary market, be strategic about holding periods. Holding beyond 12 months converts short-term gains to long-term gains, which are taxed at 20% with indexation — often more favorable than slab rates for individuals in higher tax brackets.
• Step 6 — Consult for High-Value Holdings: If you or your organization are holding T-Bills worth more than ₹50 lakh, consider professional tax consultation. Complex scenarios involving multiple holdings, trading strategies, or non-resident status require expert guidance to ensure AY 2026-27 compliance.

Key Takeaways

• Interest Income Treatment: T-Bill interest is taxable under Section 194A with 10% TDS applicable for most investors; individuals can claim ₹10,000 deduction under Section 80TTA.
• Capital Gains Taxation: Secondary market sales attract short-term capital gains tax (slab rate) if held <12 months, or long-term capital gains tax (20% with indexation) if held ≥12 months under Section 112 IT Act 2025.
• Form 15G/15H for TDS Relief: Eligible individuals can avoid TDS by filing Form 15G/15H before T-Bill purchase if total income is below exemption limit; this is the most straightforward compliance step for AY 2026-27.
• Documentation is Critical: Maintain auction results, purchase/sale confirmations, TDS certificates, and bank statements. These documents are essential if the Income Tax Department raises queries for AY 2026-27.
• Non-Resident Different Rules: NRIs face 20% TDS on T-Bill interest (treaty rates may apply); they must file ITR regardless of income level and cannot claim Section 80TTA deduction.

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