CSPX vs VUAA: Which UCITS ETF Should Indian Investors Buy?

CSPX is BlackRock's iShares Core S&P 500 UCITS ETF. As an Ireland-domiciled, accumulating fund with over €117 billion in assets, it is the largest and most established S&P 500 ETF available to Indian investors looking for tax-efficient US market exposure.

VUAA is Vanguard's answer to the exact same index. It offers the same S&P 500 exposure, the same 0.07% Total Expense Ratio, and the same accumulating structure, quickly growing to over €26 billion in assets since its 2019 launch.

Indian investors are often confused between these two because, on paper, they look nearly identical. Here is exactly how and where they differ under the hood, and which one makes the most sense for your portfolio.

Table of contents

• What CSPX and VUAA Have in Common
• Where They Differ
  • Fund Size and Liquidity
  • Tracking Difference vs TER
  • Provider Philosophy
  • Share Price and Fractional Shares
• Which Should Indian Investors Buy?
• Already Holding One? Should You Switch?

What CSPX and VUAA Have in Common

• Both track the exact same 500 US companies.
• Both are Ireland-domiciled, which eliminates the 40% US estate tax risk for Indian investors.
• Both are accumulating funds, meaning dividends are automatically reinvested internally without creating an annual taxable event.
• Both share the same Indian tax treatment: Short-Term Capital Gains (STCG) at your applicable slab rate if sold within 24 months, and Long-Term Capital Gains (LTCG) at 12.5% if held longer.
• Both are readily available on global platforms like Interactive Brokers and Paasa.

Where They Differ

Fund Size and Liquidity

CSPX is roughly five times larger than VUAA. Because it has been around nearly a decade longer, it trades with significantly higher volume.

This translates to tighter bid-ask spreads on every purchase. If you are an active trader or a long-term investor executing large monthly Systematic Investment Plans (SIPs), a tighter spread means less money lost to market makers.

Tracking Difference vs TER

The Total Expense Ratio (TER) is the headline fee you see on the fact sheet, but the tracking difference is what you actually lose versus the index in reality.

Because both ETFs physically hold the underlying stocks, they can lend those shares out to short sellers for a fee. BlackRock runs a highly active securities lending program for CSPX, generating extra revenue that goes back into the fund.

Because of this, CSPX actually outperforms its own TER, resulting in a tracking difference of around -0.02%, compared to VUAA's -0.05%.

Provider Philosophy

BlackRock is a publicly traded corporate entity driven by maximizing shareholder profit.

Vanguard, on the other hand, is structurally unique. It is owned by its own funds, which in turn are owned by the investors. This means Vanguard is structurally incentivized to cut fees and return value to the end investor over time.

Share Price and Fractional Shares

Because CSPX was launched earlier, its unit price has compounded over a much longer period and trades at a significantly higher absolute value than VUAA.

If your brokerage does not support fractional shares for European markets, VUAA's lower share price makes it much easier to invest exact amounts every month without leaving uninvested cash sitting idle in your account.

Which Should Indian Investors Buy?

For the vast majority of Indian investors, CSPX is the superior choice. The sheer size of the fund, the incredible liquidity, and the consistently better tracking difference mean you are getting the tightest execution and the best possible replication of the S&P 500.

You should pick VUAA only if your broker does not offer fractional shares and you need a lower share price to ensure your monthly capital is fully deployed. You might also prefer VUAA if you align strongly with Vanguard's investor-first corporate structure and want to support their philosophy.

Ultimately, do not overthink it. Both are top-tier, highly efficient vehicles for building long-term wealth, and picking either one puts you on the right path.

Already Holding One? Should You Switch?

If you already hold VUAA, do not sell it just to switch to CSPX. Selling your shares triggers a capital gains event in India. If you have held the ETF for less than 24 months, you will pay STCG at your slab rate. If you have held it longer, you will pay LTCG at 12.5%.

The tiny advantage you gain from CSPX's better tracking difference or bid-ask spread will be completely wiped out by the taxes you pay on the sale and the brokerage fees required to switch. If you want to transition, simply leave your existing VUAA shares alone and direct all future investments into CSPX.

Building your portfolio with Ireland-domiciled UCITS ETFs is the single most tax-efficient way for Indian investors to access global markets. You can read our complete LRS guide to learn how to fund your global account seamlessly.

About Paasa

Paasa is a global investing platform built specifically for Indian residents and returning NRIs. We bridge the gap between complex global brokerages and the specific, everyday needs of Indian investors.

• Estate Tax Protection: Paasa gives you direct access to Ireland-domiciled (UCITS) ETFs, including CSPX and VUAA. This allows you to legally shield your long-term wealth from the 40% US Estate Tax.
• Seamless Funding & LRS: We handle the LRS compliance process and secure competitive FX rates, ensuring your capital reaches the global markets efficiently.
• The Compliance Advantage: We generate ready-made capital gains and Schedule FA tax reports tailored for the Indian tax system, so you can focus entirely on growing your portfolio instead of managing spreadsheets.