Side by side

CSPX vs VOO

Same index, different home. CSPX is Irish-domiciled and reinvests dividends; VOO is US-domiciled and pays them out. Non-US investors often favour CSPX for lower dividend withholding tax and to avoid US estate-tax exposure.

$
$
yrs
Same return for bothIsolates the effect of fees
%
A fair, like-for-like testBoth funds get the same return, so any difference comes from fees alone.
Subtract fund fees
Show in today's moneyAdjust for inflation
Currency

After 25 years

CSPX vs VOO
CSPX
$542,276
8% − 0.07% fee · fees cost $6,639
VOO
$546,058
8% − 0.03% fee · fees cost $2,857

VOO ends $3,782 ahead (0.7% more), entirely because of its lower fee.

You put in $160,000 either way.

How they differ

CSPXVOO
IndexS&P 500S&P 500
Fee (TER)0.07%0.03%
DividendsAccumulatingDistributing
DomicileIrelandUnited States
ListingLondon Stock Exchange (USD)NYSE Arca (USD)
ProvideriSharesVanguard

Highlighted rows are where the two funds differ.

Growth side by side

Hover or tap the chart for any year
CSPX balanceYour contributionsVOO
$0$150k$300k$450k$600kNowYr 2Yr 4Yr 6Yr 8Yr 10Yr 12Yr 14Yr 16Yr 18Yr 20Yr 22Yr 25

Assumes monthly compounding at constant rates with contributions at the end of each month. Before personal taxes. Educational estimate only — real returns vary year to year.

Key differences

  • Both track the S&P 500, so their holdings are essentially the same.
  • VOO is cheaper: 0.03% a year versus 0.07%. On $10,000 plus $500 a month for 25 years at 7%, that fee gap is worth about $3,103.
  • CSPX reinvests dividends automatically; VOO pays them out to you. How your country taxes each can matter more than the fee.
  • CSPX is Irish-domiciled and VOO is US-domiciled. For many non-US investors, Irish funds mean lower US dividend withholding tax and no US estate-tax exposure.
  • CSPX trades on London Stock Exchange in USD; VOO trades on NYSE Arca in USD. Check which your broker offers and what it charges for currency conversion.

About each fund

CSPX — iShares Core S&P 500 UCITS ETF (Acc)

Tracks the 500 largest US companies, domiciled in Ireland. Often used by non-US investors who want S&P 500 exposure with reinvested dividends and a lower dividend withholding tax than US-domiciled funds.

VOO — Vanguard S&P 500 ETF

One of the most popular S&P 500 funds for US investors, with a very low fee. Non-US investors should check dividend withholding tax and estate-tax rules before buying US-domiciled funds.

Fund details checked November 2026. Always confirm current figures on each provider's factsheet.

Questions about CSPX vs VOO

Is CSPX or VOO better?

They track the same index (S&P 500), so neither is better at what it holds. Decide on fees, dividend handling and which one your broker offers cheaply.

Which is cheaper, CSPX or VOO?

VOO is cheaper at 0.03% a year, versus 0.07%. Fees checked November 2026; confirm with each provider.

Can I hold both CSPX and VOO?

You can, but it adds little: they hold the same companies, so owning both mostly duplicates your exposure.

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