ISAC vs VWCE — iShares MSCI ACWI vs Vanguard All-World (Poland 2026)

Quick Answer

ISAC (iShares MSCI ACWI UCITS ETF, Acc) and VWCE (Vanguard FTSE All-World UCITS ETF, Acc) are both single-ETF "buy the whole world" solutions for European investors. Headline differences:

• ISAC — ISIN IE00B6R52259, TER 0.20%, AUM ~€10B+, ~2 900 holdings, tracks MSCI ACWI
• VWCE — ISIN IE00BK5BQT80, TER 0.22%, AUM ~€16B+, ~3 700 holdings, tracks FTSE All-World

Both are Irish-domiciled, accumulating, physically replicated, and accessible via every major broker serving Polish investors (XTB, Bossa, mBank eMakler, Revolut, Trading 212, IBKR, Degiro). Both qualify for IKE and IKZE wrappers on brokers that support them.

The practical differences come from index methodology rather than product structure: FTSE All-World classifies more countries as developed (notably South Korea), includes small-caps, and has more total holdings; MSCI ACWI excludes small-caps, classifies Korea as emerging, and has slightly tighter coverage. Country weights end up nearly identical (USA ~62-65% in both), and historical performance differs by single-digit basis points per year.

This is a "Vanguard fan vs iShares fan" decision in most cases. Some investors hold both to diversify provider risk on what is meant to be a 30-year position.

Index methodology — MSCI ACWI vs FTSE All-World

The funds differ because the index families differ. Each index provider runs its own committee with slightly different rules.

MSCI ACWI (All Country World Index):

• ~2 900 large- and mid-cap stocks across 23 developed markets and 24 emerging markets
• Excludes small-caps (covered by MSCI ACWI IMI, a separate index that ISAC does not track)
• Country classifications: USA, UK, Germany, France, Japan, Australia in DM; China, India, South Korea, Taiwan in EM
• Free-float adjusted, market-cap weighted
• Reviewed quarterly; semi-annual rebalances

FTSE All-World:

• ~3 700 large- and mid-cap stocks across 26 developed markets and 24 emerging markets
• Includes a small-cap tail at the boundary — broader bottom-up coverage than MSCI ACWI
• Country classifications: South Korea is developed in FTSE (since 2009), emerging in MSCI
• Otherwise nearly identical country mix
• Reviewed semi-annually

The Korea question: MSCI considers Korea EM (FX convertibility, market access criteria), FTSE considers it DM. In practice, this means VWCE's Korea exposure (~1.5%) sits in the DM bucket and ISAC's sits in the EM bucket. Total Korea weight is roughly the same; sector exposure is the same; Samsung Electronics shows up in both funds at similar weight.

The small-cap question: MSCI ACWI's cutoff is at the 85th percentile of market cap by country. FTSE All-World stretches a bit lower. The difference is at the margin and amounts to a few hundred extra small companies in VWCE. This adds slight diversification but rarely moves performance materially.

Country breakdown comparison

Approximate weights as of 2026 (these shift quarterly):

• USA: ~62-65% in both
• Japan: ~5-6% in both
• UK: ~3-4% in both
• China: ~2-3% in both
• Canada: ~2-3% in both
• France: ~2-3% in both
• Germany: ~2% in both
• South Korea: ~1.5% in both (DM in VWCE, EM in ISAC)
• Other: spread across 40+ markets

Sector exposure also tracks closely — IT ~22-25%, Financials ~14-16%, Healthcare ~10-12%, Consumer Discretionary ~10-12%, Industrials ~10%, with smaller weights to staples, energy, materials, utilities, real estate, communication services.

Top 10 holdings are essentially identical in both funds: NVIDIA, Microsoft, Apple, Alphabet (A+C), Amazon, Meta, Berkshire, JPMorgan, ExxonMobil. Combined top-10 weight is around 18-20% in both — so concentration risk in US mega-caps is identical regardless of which you pick.

Performance — historically near-identical

For the last 5-10 years, FTSE All-World and MSCI ACWI have tracked within ~10-30 basis points per year of each other. In some years FTSE wins (when small-caps outperform); in others MSCI wins (when DM large-caps lead). Over a decade the difference is rarely material.

Tracking difference (fund vs its index) for both ISAC and VWCE typically runs -0.10% to -0.25% per year, slightly worse than TER because of FX frictions and rebalance costs, sometimes offset by securities lending.

Important framing: anyone telling you ISAC will "beat" VWCE or vice versa over the next 10 years is guessing. The indices are 90%+ overlapping. The product-level differences (TER, AUM, liquidity) are bigger than the methodology differences for retail investors.

Cost comparison

Total cost is more than headline TER:

• TER: ISAC 0.20% vs VWCE 0.22% — ISAC marginally cheaper
• Tracking difference: both -0.10% to -0.25% — historically very close, sometimes ISAC ahead, sometimes VWCE
• Bid-ask spread: VWCE slightly tighter on most venues thanks to higher AUM and trading volume; both <0.10% for retail-size trades
• Broker commission: identical regardless of which ETF — depends on broker, not on fund
• FX conversion: identical — both trade in EUR (and USD/GBP/CHF on other venues)

Over a 30-year hold, the 2 bp TER gap (0.02%) compounds to roughly 0.6% of total return — material if you are optimizing every basis point, negligible if you care more about behavioral discipline (sticking with one fund).

AUM and liquidity

• VWCE: ~€16B+ AUM, established 2019, by far the most popular single-ETF global solution among European retail investors
• ISAC: ~€10B+ AUM, established 2011, growing steadily

Both are far above the "is this fund safe from closure" threshold (typically €50-100M). Either would survive a major market downturn without liquidity issues for retail orders.

VWCE has higher daily trading volume on Xetra, Borsa Italiana, and London — which means slightly tighter spreads. For a buy-and-hold investor placing one trade per month, this matters about as much as a few cents.

Where to buy in Poland

Both ISAC and VWCE are listed on multiple European exchanges and accessible via every major broker covering Polish retail investors:

• XTB — both available on Xetra, LSE, and other venues. 0% commission under monthly turnover threshold (~100k EUR), 0.2% above with min ~10 EUR. Available in XTB Emerytalne (IKE).

• mBank eMakler — both available. Commission ~0.29% min ~19 PLN. Available in IKE / IKZE wrapper.

• Bossa (DM BOŚ) — both available via Bossa World. Commission 0.29% min 19 PLN. IKE / IKZE support.

• PKO eMakler — coverage of foreign ETFs is narrower than XTB / Bossa. Verify VWCE / ISAC presence in account dashboard before assuming.

• Revolut — VWCE is part of Revolut's curated ETF list. ISAC may not be directly available on the retail product, depending on tier and country. https://revolut.com/referral/?referral-code=rafa9jcta!MAR1-26-AR for a Revolut account.

• Trading 212 — both available, fractional shares supported, commission-free trades, FX spread applies.

• Interactive Brokers (IBKR) — both available across all listings, Tier pricing typically <2 EUR per trade.

• Degiro — both in their Core (commission-free) selection in past years. Verify current core list.

For Polish investors, both are equally accessible. The decision is rarely "which can I buy" — usually "which do I prefer at the level of provider, methodology, and personal preference."

ISAC vs VWCE inside IKE / IKZE

Both qualify for both wrappers wherever the broker supports the underlying market and the IKE/IKZE structure simultaneously.

• IKE limit 2026: 26 019 zł — gains free from Belka tax (19%) when withdrawn after age 60 (with 5 years of contributions).
• IKZE limit 2026: 10 407 zł (standard) / 15 611 zł (B2B / self-employed) — contributions deductible from current-year tax base; 10% flat tax on full withdrawal after age 65.

For a 30-year horizon, the tax shelter is the dominant variable — far more impactful than 2 bp of TER difference. If you can fit either ISAC or VWCE inside IKE, do that before optimizing on which provider.

Decision matrix — which to choose

Approach this as preference, not optimization. Frames that may help:

• You like Vanguard's mutualized ownership structure → VWCE. Vanguard is owned by its funds, which are owned by investors. Some find this aligns incentives over decades.
• You like iShares' broader product family → ISAC. iShares (BlackRock) has the largest UCITS ETF lineup; if you plan to add other iShares funds, sticking with one provider may simplify reporting.
• You want small-cap inclusion → VWCE has more bottom-of-the-barrel companies thanks to FTSE methodology.
• You want lower TER → ISAC by 2 bp.
• You want maximum liquidity / tightest spread → VWCE slightly ahead on Xetra and Borsa Italiana volume.
• You are using Trading 212 / Revolut and one is on a free list while the other is not → use whichever is cheaper at your broker.

Why not both?

A small but defensible reason to hold both ISAC and VWCE: you diversify against provider-specific operational risk (back-office issue, regulatory change, fund liquidation). Functionally the funds are 95%+ overlapping, so this is not portfolio diversification in any meaningful sense — it is fund-house diversification.

For a single-ETF portfolio investor, holding two near-identical global funds adds rebalancing complexity without performance benefit. Most people pick one and stay with it for the long term.

Risks both share

• US concentration: ~62-65% of either fund is US equities. A repeat of 2000-2002 (US underperforms by 30-50% vs ex-US) hits both equally.
• Currency exposure: neither is hedged. Polish investor returns are subject to PLN/USD/EUR/JPY/GBP movement.
• Single-day liquidation risk — extremely low for both, given €10B+ AUM, but theoretically possible in extreme scenarios.
• Index reconstitution — every quarter / semi-annual rebalance creates small turnover and tracking-difference noise.
• Tax mechanism in Poland — no W-8BEN needed (Irish domicile handles it), but Belka 19% on capital gains outside IKE/IKZE applies. Brokers like IBKR do not issue PIT-8C, so you self-calculate from CSV statements.

Excel vs portfolio tracker

Tracking ISAC or VWCE alone in Excel is trivial. The complexity arrives when you start adding satellite positions (an EM tilt with EIMI, a bond sleeve with AGGH, individual stocks, IKE separately from your taxable account, IKZE in another broker). Each new layer adds reconciliation work — pulling current prices, computing FX, separating Belka-eligible gains from IKE-shielded ones.

Freenance integrates with Polish brokers and sums positions across all your accounts in one view. Your VWCE in XTB IKE shows up next to your ISAC in mBank eMakler taxable account, with realized and unrealized PLN gains separated by tax wrapper. No Excel maintenance.

FAQ

What is the TER of ISAC?

0.20% per year as of 2026, slightly cheaper than VWCE's 0.22%. The 2 bp gap compounds to roughly 0.6% of total return over 30 years.

What is the difference between ISAC and VWCE in terms of Korea exposure?

Total Korea weight is similar (~1.5% in both). The classification differs: FTSE All-World (VWCE) treats Korea as developed market; MSCI ACWI (ISAC) treats Korea as emerging market. Underlying holdings (Samsung, SK Hynix, etc.) appear in both at similar weights.

Are ISAC and VWCE both accumulating?

Yes. Both reinvest dividends inside the fund (~1.5-1.8% gross yield for global equity in 2026). No cash payout to holders. NAV reflects the reinvestment.

Can I buy ISAC and VWCE on PKO eMakler?

PKO eMakler's foreign ETF coverage is narrower than XTB or Bossa. Check current offer in your account; in past years both have been available, but the list shifts. If neither is in PKO's selection, XTB and Bossa cover both reliably.

What is the currency exposure of these funds for a Polish investor?

Both funds hold global equities denominated in many currencies (USD ~62-65%, EUR ~10%, JPY ~5-6%, GBP ~3-4%, others ~15-20%). Neither is currency-hedged. Your PLN return reflects equity performance plus the basket of FX movements against PLN.

Is currency hedging available for ISAC or VWCE?

Not as standard share classes. iShares offers some hedged variants of regional indices (e.g. EUR-hedged S&P 500), but no widely-distributed EUR-hedged share class of either MSCI ACWI or FTSE All-World as of 2026. For a multi-decade horizon, most investors accept FX exposure as part of global equity ownership.

How do the ISINs differ?

ISAC: IE00B6R52259. VWCE: IE00BK5BQT80. Both Irish-domiciled UCITS — the country code IE is the relevant indicator for tax purposes (no W-8BEN needed for Polish residents).

What does "accumulating" mean in practice?

You receive no cash dividend distributions. The fund collects dividends from its ~3 000+ underlying companies, pays applicable withholding taxes inside Ireland's tax-treaty network, and reinvests the net amount into the index basket. Your unit count stays the same but each unit's NAV grows from both price appreciation and reinvested dividends.

What is the typical tracking difference?

Both funds historically track their respective index within -0.10% to -0.25% per year. This is normal for global ETFs with high holding count and FX rebalancing. Some years one beats its index slightly thanks to securities lending revenue.

Are both ISAC and VWCE eligible for IKE and IKZE?

Yes, on brokers that support both the Xetra/LSE listings and the IKE/IKZE wrapper. XTB Emerytalne, Bossa IKE/IKZE, and mBank eMakler IKE/IKZE all support both funds.

Which is better for a beginner?

Both are defensible choices. VWCE has slightly higher visibility in European retail communities (Bogleheads-EU, r/EuropeFIRE) which can ease the learning curve via shared discussion. ISAC is functionally equivalent and 2 bp cheaper. The decision rarely matters more than the discipline of regular contributions.

Is there a "Why not VOO?" answer for global ETFs?

US-domiciled global equity ETFs (e.g. VT) face the same EU access restrictions as VOO — most EU retail brokers cannot offer them due to PRIIPs/MiFID II KID requirements. Irish UCITS like ISAC and VWCE are the practical route for Polish investors.

How does Polish Belka tax treat gains on these funds?

On sale outside IKE/IKZE, capital gains (sell price minus average buy cost, both PLN-equivalent) are taxed at 19% via PIT-38, due April 30 of the following year. PL brokers issue PIT-8C; foreign brokers (IBKR, Degiro) require self-calculation. Inside IKE there is no Belka. Inside IKZE, withdrawal after age 65 incurs 10% flat tax on the full amount (capital plus gains).

What if I already hold IWDA and EIMI separately?

IWDA (developed) + EIMI (emerging) at roughly 88/12 weight approximates MSCI ACWI exposure with two funds. Some investors prefer this for the flexibility to overweight or underweight EM independently. Single-fund VWCE or ISAC is simpler; two-fund IWDA + EIMI is more granular. Neither is "better" — depends on whether you want to control the EM weight separately.

This article is informational and does not constitute investment advice. Past performance does not guarantee future returns. Consider consulting a licensed advisor before making investment decisions.