HDFC BSE Sensex Index Fund: October 2026 AUM, TER, Tracking Risk and Tax Guide

Summary: HDFC BSE Sensex Index Fund is an open-ended passive equity mutual-fund scheme seeking returns commensurate with the BSE SENSEX Total Returns Index, subject to tracking error. Its benchmark comprises 30 large, actively traded Indian listed companies; the fund attempts index replication rather than discretionary selection of shares. The official HDFC Mutual Fund product page checked on 11 October 2026 displays assets under management of ₹7,972.95 crore as at 30 September 2026, a Very High scheme Riskometer, inception on 17 July 2002, and a minimum SIP of ₹100. The AMC’s September 2026 Index Insider, reporting fund statistics as at 31 August 2026, shows AUM of approximately ₹8,495.6 crore, total expense ratios of 0.38% for the Regular Plan and 0.22% for the Direct Plan, and annualised tracking errors of 0.04% for each plan. The scheme’s published exit load is 0.25% on units redeemed or switched out within three days of allotment, with no exit load thereafter. A fall in AUM between the two reporting dates should not be interpreted as a measure of scheme return because it also reflects investor flows. The fund carries equity-market and index-concentration risk notwithstanding passive management. The AMC website shows a since-inception return figure of 13.73% in the Regular Plan view when accessed on 11 October 2026, but does not clearly date that observation; the figure is therefore identified as an undated live-page indicator rather than a period-end performance comparison. For Tax Year 2026-27, qualifying equity-oriented fund redemptions ordinarily follow the 20% short-term and 12.5% long-term capital-gains framework above the aggregate ₹1.25 lakh threshold, subject to holding period, STT, taxpayer status and other conditions. This article explains the scheme’s structure, dated facts, expense drag, investor documentation, loss set-off and NRI considerations without predicting returns or recommending a transaction.

Scheme Identification and Primary Disclosures

The scheme is operated by HDFC Mutual Fund, managed by HDFC Asset Management Company Limited and governed by its Scheme Information Document (SID), Key Information Memorandum (KIM), subsequent addenda, monthly portfolio disclosures and the SEBI (Mutual Funds) Regulations, 2026. The official product page describes it as an open-ended scheme replicating or tracking the BSE SENSEX Index (TRI). The AMC states that achieving the objective is not assured. This is a mutual fund, not a fixed-income or capital-guaranteed product.

Investment Objective, Benchmark and Replication

The BSE Sensex is a widely followed large-cap Indian equity index consisting of 30 actively traded companies. The Total Returns Index (TRI) version incorporates dividends in the index-return calculation and is therefore the appropriate benchmark for assessing the fund’s total-return replication. A price-only index and a TRI are not interchangeable: comparison against the wrong index can create an artificial appearance of underperformance or outperformance.

An index fund normally seeks to hold the benchmark constituents in similar proportions, while retaining operational cash and adjusting positions for subscriptions, redemptions, index changes and corporate actions. Its portfolio is not static: a company may enter or leave the Sensex following index-provider review, and index weights change with market prices. The fund is therefore rule-based but not mechanically free of execution decisions, transaction costs or timing differences.

Portfolio Construction and Concentration Risks

The AMC’s product page identifies a portfolio-and-top-holdings disclosure section dated 31 August 2026, while the separately available Index Insider provides verified fund-level AUM, TER and tracking-error data. The accessible official extracts reviewed for this article do not provide a dependable individual-stock weight table for this scheme. Accordingly, this article deliberately does not reproduce or invent top-ten holding percentages. Readers requiring security-level exposure should consult the AMC’s full 31 August or 30 September 2026 monthly portfolio file before treating a stock weight as current.

Diversification across 30 securities is not equivalent to equal weighting across 30 securities. A market-cap-weighted benchmark can have a large share of assets in its biggest constituents. The fund’s 30-stock universe is narrower than a 50-stock or 500-stock broad-market benchmark, and all these indices remain exposed to Indian equity-market valuation and liquidity conditions. None of these statements imply that a particular index will outperform another.

Dated AUM: Why Two Official Figures Differ

The difference is approximately ₹522.65 crore, or about 6.15% of the August amount, calculated as (₹8,495.60 crore minus ₹7,972.95 crore) divided by ₹8,495.60 crore. This arithmetic describes the change in assets under management, not a loss suffered by a continuing unit holder. AUM reflects both changes in NAV and net subscriptions or redemptions. A proper investment-return analysis requires matching NAVs for the same plan and option on the two relevant dates, adjusted for distributions where applicable.

Total Expense Ratio, Direct and Regular Plans

The AMC’s September Index Insider states TER of 0.38% p.a. for the Regular Plan and 0.22% p.a. for the Direct Plan as at 31 August 2026. The difference of 0.16 percentage point is an expense-structure difference, not an assured future return difference. TER is charged within the scheme and reflected in published NAV; it is not generally a separate invoice to an investor. Expense ratios may change within the current SEBI framework, so these historical rates must be dated and should not be described as permanently fixed.

A passive strategy does not make expenses irrelevant. Over time, expenses, transaction costs, cash positions and imperfect replication create tracking difference from the index. An investor comparing Direct and Regular figures must use matching dates, the same growth/distribution option and the appropriate benchmark. A difference in quoted NAV between plans is not by itself evidence of one plan having superior securities or a different underlying portfolio.

Tracking Error and Tracking Difference

The AMC’s Index Insider gives annualised tracking error of 0.04% for both plans at the August 2026 reporting date. Tracking error measures variability of the difference between fund and benchmark returns over the specified observation period; it is not the same as the cumulative shortfall between the scheme return and the benchmark return. Tracking difference is the actual return gap over a defined period and can reflect expenses, cash drag, dividends, securities lending, transaction costs and corporate actions.

A low historical tracking error does not cap future losses or guarantee that the fund will closely follow the index during a market disruption. The index itself can fall sharply. Tracking measures should therefore be assessed alongside the official Very High Riskometer and the actual composition of the benchmark, not used as a substitute for understanding equity risk.

Exit Load, Redemption and Investment Mechanics

The AMC’s current product page specifies an exit load of 0.25% for units redeemed or switched out within three days of allotment and nil for redemption after three days, subject to the scheme’s stated exceptions. Each purchase or SIP instalment has its own allotment date for load-period and capital-gains holding-period purposes. A switch between funds or between plans can create a tax event even if the proceeds are reinvested without reaching the investor’s bank account.

The website lists a minimum SIP of ₹100. A purchase or additional purchase minimum may differ by mode or transaction channel; the latest KIM and AMC order-entry screen should be used for the exact minimum. Transactions require compliant KYC, PAN or permitted exemption documentation, bank mandate and completion of applicable investor-risk and FATCA/CRS declarations. NAV allotment depends on the SEBI cut-off and realisation-of-funds rules, not merely the moment an investor clicks the submit button.

Historical Performance: Dated Evidence Versus Live Web Indicators

The official Regular Plan webpage displayed a since-inception return figure of 13.73% when accessed on 11 October 2026. The webpage extract did not clearly state the return-calculation end date or provide a matching benchmark return for that figure. It is therefore not presented as a return for September 2026, nor as an independently verified return to 11 October 2026. The current, dated facts used elsewhere in this article are the AMC’s 31 August TER/tracking-error and 30 September AUM. Investors comparing historical performance should obtain the AMC’s dated plan-wise 1-, 3-, 5- and 10-year table and benchmark data for the same end date.

Past performance may or may not be sustained and is not a guarantee of future returns. Any return reported for a period longer than one year must be interpreted as an annualised figure where the AMC states CAGR; one-year returns are point-to-point. Performance numbers are also plan- and option-specific. This article does not extrapolate the AMC’s historical indicator into a forecast, price target or expected CAGR.

SEBI Framework and Riskometer

The SEBI (Mutual Funds) Regulations, 2026 took effect on 1 April 2026; SEBI published an amended version dated 7 July 2026 and a Master Circular for Mutual Funds on 20 March 2026. The scheme’s SID dated 21 November 2025 must therefore be read with later amendments, addenda and the current regulatory framework. SEBI registration regulates the mutual fund but does not insure capital or endorse an individual scheme’s performance.

The AMC labels the scheme Very High risk. Equity prices, index concentration, market-wide liquidity, corporate actions, operational replication, expense changes and investor behaviour can affect the NAV. A passive index fund can experience substantial drawdowns during a broad-market fall. No bank deposit-insurance protection applies to units of this mutual fund, and the index provider does not guarantee investment outcomes.

Income-Tax Treatment for Tax Year 2026-27

The Income-tax Act, 2025 governs Tax Year 2026-27. For units qualifying as an equity-oriented mutual fund and satisfying the relevant STT conditions, the special equity capital-gains framework applies. A redemption or switch can trigger capital gains even if the investor does not receive cash in a bank account. The acquisition date and cost of each unit lot must be maintained, particularly for systematic investment plans.

TaxGuru’s recent explanation of tax on ELSS redemption and the equity-fund capital-gains framework discusses the 20%/12.5% structure and the aggregate ₹1.25 lakh long-term threshold. Although ELSS has a statutory lock-in and this Sensex index scheme does not, the qualifying equity-fund capital-gains principles are relevant to the present analysis.

STT, Taxable Gains and Loss Carry-Forward

Securities Transaction Tax (STT) on eligible equity-fund redemptions or exchange transactions must be considered according to the actual transaction. STT is not the same as income-tax on the capital gain. The special rates depend on the statutory STT and other eligibility conditions. For capital-loss computation, a short-term capital loss can generally be set off against short-term or long-term capital gains, while a long-term capital loss is generally set off only against long-term gains. Eligible unabsorbed losses may be carried forward for the statutory period, subject to timely return filing and other conditions.

TaxGuru’s discussion of equity-oriented and debt-fund tax classification explains why the legal category of a mutual fund, not simply the word “mutual fund”, determines the capital-gains framework. This Sensex index fund is designed for domestic equity replication; a fund of funds or debt-heavy scheme should not automatically be assigned the same rates.

NRI, FEMA, Withholding and Treaty Questions

An NRI investor must separately examine eligibility under the applicable FEMA route, KYC and bank-account requirements, repatriation or non-repatriation basis, residential status for Indian income-tax and possible treaty entitlement. Non-resident withholding on redemptions may be applied under rules that differ from resident investor treatment, and the amount withheld need not equal the final tax payable. A non-resident should preserve the original investment remittance trail, transaction statements, tax residency documentation and any valid treaty forms.

TaxGuru’s NRI return-filing and TDS guide explains the separation between income-tax residential status, taxable Indian capital gains and refund/reporting mechanics. It should not be read as permission to ignore FEMA restrictions or foreign-jurisdiction tax rules.

SIP, STP, SWP and Accounting Records

An SIP is a series of separate purchases. The investor should record each instalment’s date, units, NAV, stamp duty and cost. A systematic transfer plan involves a redemption in the source scheme and a purchase in the destination scheme; a systematic withdrawal plan generally redeems units periodically. These are transaction methods, not exemptions from capital-gains tax. For accurate tax reporting, obtain the AMC/RTA capital-gains statement and reconcile it with the consolidated account statement and bank credits.

A business or institutional holder should consider the applicable accounting framework for investments in mutual-fund units, including classification, measurement, fair-value changes and disclosures under the relevant AS or Ind AS. For an Ind AS reporting entity, Ind AS 109 classification and fair-value measurement generally require attention; accounting treatment does not replace the separate tax computation. Custody, valuation, cut-off and related-party controls may also be relevant for audit purposes.

Comparison With Other Passive Structures: Facts, Not Rankings

TaxGuru’s existing HDFC Nifty 50 Index Fund explanation discusses a different 50-stock benchmark and its dated scheme facts. The present scheme tracks a 30-stock BSE Sensex TRI. Both are passive equity strategies but differ in index construction and holdings. A comparison should use each scheme’s current TER, tracking difference, portfolio concentration, benchmark and transaction terms rather than assume that two index funds have identical exposure.

A direct equity portfolio, an exchange-traded fund and an open-ended index mutual fund also differ in trading mechanism, expenses, settlement, operational controls and tax-event timing. These differences are explanatory; this article does not rank or recommend any route. The scheme’s own current SID, KIM, riskometer and monthly portfolio remain the decisive sources for product-specific disclosures.

Documentation Checklist

• Confirm the exact scheme name, plan and option before using any historical performance number.
• Download the current SID/KIM and all addenda; the base SID was dated 21 November 2025.
• Record that the latest AUM figure used here is as at 30 September 2026, not 31 August.
• Treat TER and tracking error as dated 31 August 2026, subject to later revision.
• Verify the full portfolio weight disclosure from the AMC rather than assuming Nifty 50 weights apply to Sensex.
• Maintain SIP-lot cost, allotment dates, redemption confirmations, STT evidence and capital-gains statements.
• Check NRI FEMA, treaty and withholding documents separately from resident investor rules.
• Do not infer future returns from a since-inception web indicator or from AUM movements.

Frequently Asked Questions

1. What benchmark does HDFC BSE Sensex Index Fund track?

The BSE SENSEX Total Returns Index (TRI), subject to tracking error.

2. What was its AUM on 30 September 2026?

The AMC product page reported ₹7,972.95 crore.

3. What TER was disclosed for August 2026?

The AMC’s Index Insider showed 0.38% Regular and 0.22% Direct.

4. Is the scheme low risk because it is passive?

No. The AMC labels it Very High risk; passive replication does not remove equity-market losses.

5. What exit load applies?

The published exit load is 0.25% for redemption within three days of allotment and nil thereafter, subject to scheme exceptions.

6. Does the ₹100 minimum refer to all transactions?

The AMC product page states minimum SIP ₹100. Other transaction minima should be verified in the current KIM.

7. How are redemptions taxed in Tax Year 2026-27?

Qualifying equity-oriented fund gains generally follow 20% short-term or 12.5% long-term rates above the aggregate ₹1.25 lakh threshold, subject to law.

8. Can an NRI rely on resident withholding rules?

No. NRI withholding, FEMA account route, treaty documents and repatriation require separate review.

Key Takeaways

• HDFC BSE Sensex Index Fund passively tracks a 30-stock BSE SENSEX TRI benchmark.
• AUM was ₹7,972.95 crore on 30 September 2026; August AUM was approximately ₹8,495.6 crore.
• TER of 0.38% Regular and 0.22% Direct and tracking error of 0.04% for both plans are dated August 2026.
• The scheme and benchmark are equity-linked; the scheme Riskometer is Very High.
• Exit load is 0.25% within three days and nil thereafter under published terms.
• The AMC’s undated since-inception webpage indicator is not a verified September-end return series.
• Capital-gains, loss and NRI compliance must be computed for the investor’s actual transactions under current law.

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Disclaimer: This article is provided solely for general information and education and reflects HDFC Mutual Fund’s official scheme page accessed on 11 October 2026, its September 2026 Index Insider with data as at 31 August 2026, relevant scheme documents and the SEBI/Income-tax framework in force on the publication date. It is not an offer, ranking, recommendation, prediction, target, trading signal or personalised investment, financial, tax, legal or accounting advice. The live webpage since-inception performance indicator was not accompanied in the accessible extract by a clear calculation end date and is not presented as a dated comparative return; individual stock portfolio weights have deliberately not been invented. AUM, NAV, TER, tracking error, riskometer, holdings, exit load, eligibility and tax rules may change, and historical performance does not guarantee future results. Investors must review the latest SID, KIM, addenda, portfolio and official transaction terms and consult appropriate professionals where required. TaxGuru, its owners, management, editors, employees and contributors accept no responsibility or liability for any loss, tax, interest, penalty, investment decision, damage or other consequence arising from reliance on or use of this article.

Primary Sources Reviewed

• HDFC Mutual Fund, HDFC BSE Sensex Index Fund official Regular Plan webpage, AUM dated 30 September 2026, accessed 11 October 2026.
• HDFC Mutual Fund, September 2026 Index Insider, fund-level TER, AUM and tracking error as at 31 August 2026.
• HDFC Mutual Fund, HDFC BSE Sensex Index Fund SID and KIM dated 21 November 2025, subject to later addenda.
• SEBI, Mutual Funds Regulations, 2026 (as amended 7 July 2026), and Master Circular dated 20 March 2026.
• Income-tax Act, 2025, equity-oriented fund capital-gains treatment for Tax Year 2026-27.