Treasury Bills Income Tax 2026: TDS, Investment Rules & Tax Planning

What Happened?

The Government of India successfully conducted a Treasury Bills auction in November 2026, offering ₹23,000 crore across three categories: 91-day (₹8,000 crore), 182-day (₹8,000 crore), and 364-day (₹7,000 crore) bills. The auction saw strong investor participation with competitive and non-competitive bids heavily oversubscribing the notified amount. Yield-to-Maturity (YTM) ranged from 5.8871% to 6.6330%, indicating the current interest rate environment for government securities.

Background & Legal Context

Treasury Bills (T-Bills) are short-term debt instruments issued by the Reserve Bank of India on behalf of the Government of India. Under the Income Tax Act 2025, interest income earned on T-Bills is taxable as "income from other sources" under Chapter VIA (Section 80 onwards for deductions and Section 56 for income computation).

Key Tax Rules for Treasury Bills:

• Section 194A - TDS on Interest: Banks and financial institutions must deduct Tax-Deducted-at-Source (TDS) at 40% of the basic rate (currently 10% + 4% cess = 10.4%) on T-Bill interest when the interest exceeds ₹50,000 in a financial year for individuals. This applies to Assessment Year 2026-27 (FY 2025-26 onwards).
• Section 80TTA - Interest Exemption: Senior citizens (age 60+ as on 1st April of the relevant FY) can claim exemption of up to ₹50,000 from interest income earned on deposits, including T-Bills. Non-seniors can claim exemption up to ₹10,000.
• Section 139(1) - Filing Obligation: Any individual earning T-Bill interest income exceeding the basic exemption limit (₹2.5 lakh for general individuals; ₹5 lakh for senior citizens in AY 2026-27) must file an ITR, even if TDS has been deducted.
• Section 56 - Computation: T-Bill income is computed as interest income. The "difference" between face value and purchase price (discount) is treated as interest and is fully taxable.
• GST Treatment: T-Bills issued by RBI are exempt from GST under GST exemption schedule for government securities.

The strong auction results (₹20.5 crore bids for 91-day bills against ₹8,000 crore notified) indicate healthy demand for low-risk government securities, particularly in the current high-interest-rate environment.

What Does This Mean for You?

For Individual Investors:

• Tax Planning Opportunity: With YTM at 5.89% (91-day) to 6.63% (364-day), T-Bills offer tax-efficient returns. If you're in the 20% or 30% income tax bracket, the post-tax yield is approximately 4.7% to 5.3%. However, senior citizens claiming ₹50,000 exemption under Section 80TTA can reduce taxable income significantly.
• TDS Impact: If you invest ₹80 lakh at 6% YTM, annual interest will be ₹48,000 (below ₹50,000 TDS threshold), avoiding TDS deduction. However, you must still file ITR if total income exceeds exemption limit.
• Higher Yield vs. Savings Account: T-Bills at 5.89% YTM beat savings bank interest (4% average). After TDS @ 10.4%, effective return is 5.28%, still higher than taxed savings income.
• Non-Competitive Bid Advantage: If you bid non-competitively (as 14 individuals did in this auction), you get guaranteed allotment at the weighted average price (₹98.5535 for 91-day bills), removing auction uncertainty.

For Corporate Investors & Mutual Funds:

• Corporate tax rate on T-Bill interest is 20% (basic) + surcharge + cess under Section 112A (for companies with turnover ≤ ₹400 crore). Surcharge depends on profit level.
• Mutual Funds investing in T-Bills are subject to Income Distribution Tax (IDT) under Section 2(42), though dividend reinvestment is preferred for tax deferral.
• Portfolio managers and funds must report T-Bill holdings under Schedule FA (Foreign Assets) if any portion is held offshore (not applicable here as these are domestic auctions).

For HUF and Trusts:

• HUFs are taxed at slab rates like individuals, making Section 80TTA exemption applicable at ₹10,000 (₹50,000 only if senior citizen member is primary investor).
• Trusts taxed at flat 30% + surcharge + cess, losing exemption benefits. Hence, T-Bill investment through trusts is less tax-efficient.

What Should You Do Now?

Step 1: Assess Your Investment Eligibility

• Check if you have Demat and Current Account with RBI-approved banks. Only these account holders can participate directly in T-Bill auctions.
• Senior citizens should prioritize T-Bill investment to maximize Section 80TTA exemption (₹50,000 vs. ₹10,000 for others).

Step 2: Evaluate Bid Strategy

• Decide between competitive bid (uncertain allotment, possible lower price) vs. non-competitive bid (guaranteed allotment at WAY). For most retail investors, non-competitive bids are safer.
• 364-day bills (6.63% YTM) offer higher returns but lock funds for longer. For emergency funds, 91-day bills are better.

Step 3: Tax Planning & Documentation

• Calculate estimated T-Bill interest income and cross-check against Section 80TTA exemption limits.
• If you expect TDS deduction, ensure your bank has updated PAN and avoid penalty under Section 271G (TDS compliance).
• Maintain T-Bill purchase statements and interest credit memos for ITR filing in AY 2026-27.

Step 4: ITR Filing Compliance

• Even if TDS is deducted at source, file ITR if total income exceeds basic exemption limit. Report T-Bill interest under "Income from Other Sources" (Schedule VIA in ITR-1 or Schedule OS in ITR-2).
• Claim exemption under Section 80TTA (if applicable) in Part B-II of ITR.

Step 5: Track for Future Auctions

• T-Bill auctions occur bi-weekly. Track upcoming auctions based on your liquidity needs and interest rate forecasts.
• Current YTM levels (5.89%-6.63%) are favorable. If RBI indicates rate cuts, lock in current rates through 364-day bills.

Key Takeaways

• T-Bill Interest is Taxable: All interest income from Treasury Bills is taxable as "income from other sources" under Income Tax Act 2025, with TDS deduction @ 10.4% if interest exceeds ₹50,000 p.a. (Section 194A).
• Section 80TTA Exemption is Critical: Senior citizens can exempt ₹50,000 T-Bill interest; others only ₹10,000. Plan investments accordingly to maximize this deduction in AY 2026-27.
• Post-Tax Yield Beats Alternatives: At 5.89%-6.63% YTM, T-Bills provide 4.7%-5.3% post-tax returns for taxed investors, outperforming savings deposits (4% average, taxed at slab rate).
• Non-Competitive Bids Reduce Risk: Guaranteed allotment at weighted average price removes auction uncertainty, making them ideal for first-time T-Bill investors planning for AY 2026-27 tax filing.
• ITR Filing Mandatory if Income Exceeds Limit: Regardless of TDS deduction, file ITR if total income (including T-Bill interest) exceeds ₹2.5 lakh (₹5 lakh for seniors). Failure invites penalty under Section 271G.

Important Note: This advisory is based on Income Tax Act 2025 provisions effective for Assessment Year 2026-27. Consult a tax professional before making investment decisions, as individual circumstances vary and amendments may occur.

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