Form 173A Explained: Who Must File It — and Who Need Not

Form 173A, notified by the CBDT on 19 October 2026, is mandatory only for two narrow categories claiming a specific government-securities tax exemption: foreign institutional investors (entry 13D) and the Bank for International Settlements (entry 13E) under Schedule IV of the Income-tax Act, 2025. Ordinary investors need not file it.

If you saw a headline this week saying the tax department has made a new form "mandatory" for tax exemption on government securities, you may have wondered whether you now have one more form to file. For the overwhelming majority of Indian investors, the answer is no.

On 19 October 2026, the Central Board of Direct Taxes (CBDT) notified the Income-tax (Seventh Amendment) Rules, 2026, through Notification No. 137/2026, published as G.S.R. 901(E) in the Official Gazette. The amendment came into force on the date of its publication in the Gazette. The amendment does two things: 1. It inserts a new Rule 281A after Rule 281 of the Income-tax Rules, 2026. 2. It inserts a new Form 173A, placed immediately after Form 173. Rule 281A, as reported by multiple outlets, provides that an assessee claiming exemption under Schedule IV (Table entries 13D and 13E) of the Income-tax Act, 2025, must furnish information in Form 173A. In plain language: the form is the prescribed disclosure route for claiming those two specific exemptions — it is not a new filing requirement for the investing public at large. Note on sourcing: this article paraphrases Rule 281A from corroborating secondary reporting (Business Standard, The Hindu BusinessLine, The Economic Times). The Gazette text itself was not independently quoted here, so no verbatim quotation of the rule appears in this article.

This is the heart of the story, and it is where most social-media summaries go wrong. Only two categories of claimant fall within entries 13D and 13E: - Entry 13D — foreign institutional investors (FIIs): eligible FIIs claiming exemption on specified interest income and capital gains from government securities. - Entry 13E — the Bank for International Settlements (BIS): the Basel-based institution owned by central banks, claiming exemption on interest income and capital gains from government securities. The exemptions cover interest income from government securities and capital gains arising from their sale, exchange or transfer. Everyone else is outside this form. That includes: - Individual investors who buy government securities directly through RBI Retail Direct. - Investors who hold gilt funds or other debt mutual funds that invest in government securities. - Companies, trusts and other ordinary taxpayers holding government bonds, Treasury Bills or State Development Loans. - Any investor who is not claiming an exemption under entries 13D or 13E. Business Standard states the point plainly: the exemptions are not available to ordinary investors. If you do not fall under entry 13D or 13E, Form 173A simply does not apply to you, and no new compliance step has been added to your tax life.

For the small set of entities that do need it, Form 173A is a detailed disclosure document in two parts. Understanding its contents also shows why it was never designed for retail investors — it asks for institutional-level identifiers and security-level transaction data. Part A — identity details: - Name of the claimant - Country of residence (or headquarters, for the BIS) - Address in the country of residence or headquarters - Permanent Account Number (PAN) - Tax year for which the exemption is claimed - Email address and contact number - Tax Identification Number (TIN) in the country of residence - SEBI registration number as a foreign portfolio investor (FPI) or foreign institutional investor (FII) The TIN and the SEBI registration number are optional for the Bank for International Settlements, which is not a SEBI-registered market participant in the usual sense. Part B — holdings and income details, reported security by security: - International Securities Identification Number (ISIN) of each security - Type of government security — Treasury Bills, fixed-rate bonds, floating-rate bonds, State Development Loans (SDLs), or others - Tenor of the security - Total value of securities held on 1 April and on 31 March of the tax year - Value of securities purchased during the year - Sale consideration for securities sold during the year - Gross interest received or accrued during the tax year - Capital gains earned during the tax year The form also requires a statement by an authorised person confirming that the information provided is correct. In effect, it is a verification trail: the tax department wants to see exactly which securities generated the exempt income, and how much, before allowing the exemption.

If you are an ordinary Indian investor, here is your complete action list on Form 173A: nothing. Specifically: 1. Do not file Form 173A. It is not part of your return, and filing it would not give you any exemption. 2. Do not expect a new tax break on your G-Secs. Interest on government securities you hold directly continues to be taxed under the normal rules that apply to you — coupon interest is generally added to your income and taxed at your applicable slab rate. There is no new exemption for retail holders. 3. Do not change how you report gilt-fund gains. Units of a mutual fund are taxed under the rules for mutual-fund units when you redeem them, not under the government-securities exemption entries. 4. Do keep your usual records. Your interest certificates, account statements and capital-gains statements remain the documents that matter for your own return. 5. Do not confuse a sovereign guarantee with a tax exemption. Government securities are backed by the government, which addresses credit risk. That backing has never, by itself, made their interest tax-free for retail investors. If you are unsure whether any exemption applies to your own situation, that is a question for a chartered accountant who can look at your specific holdings — not something a general news article can settle for you.

Readers of this blog may remember our 16 October post on another new CBDT form, Form 161. The two forms are unrelated, and mixing them up could cause real mistakes: - Form 161 (notified 8 October 2026, Notification No. 134/2026): a penalty-waiver route — an assessee could pay 100–120% extra tax to seek waiver of penalty in specified cases. It was aimed at taxpayers facing penalty proceedings. - Form 173A (notified 19 October 2026, Notification No. 137/2026): a disclosure form for claiming a specific government-securities exemption, available only to FIIs and the BIS. Different numbers, different dates, different purposes, different audiences. Neither form is something the average retail investor needs to rush to file.

For an FII or the BIS, the practical consequence is straightforward: the rule makes furnishing Form 173A the prescribed route for claiming the 13D/13E exemption. The reporting reviewed for this article does not describe a new penalty attached to Form 173A itself, and this article does not invent one. For everyone else, there is no consequence at all — because there is no obligation in the first place.

Exemptions are exceptions to the normal tax net, and tax administrations increasingly ask claimants to show their workings. Form 173A fits that pattern: rather than accepting an exemption claim at face value, the department now collects security-level data — ISINs, tenors, holdings, purchases, sales, interest and gains — so claims can be matched and verified. Nothing in this notification changes the investment case for government securities for ordinary savers.

Disclaimer: This article is for educational purposes only and is not financial advice. Please consult a SEBI-registered investment adviser for personalized guidance. Investments are subject to market risk. Tax filing specifics should be confirmed with a chartered accountant, since individual circumstances vary.

Sources: Business Standard, "CBDT notifies new form for tax exemption claims on govt securities", 20 October 2026; The Hindu BusinessLine, "CBDT introduces Form 173A for tax exemption claims on government securities", October 2026; The Economic Times, "CBDT makes Form 173A mandatory to claim tax exemption on interest and gains from government securities", October 2026; The Financial Express, "A new tax benefit on government bonds? Who qualifies and what you should know", October 2026 (corroboration on G.S.R. 901(E) and the notification text).