Brokers Last Fact-Checked: 26 May 2026 · 6 min read

Cheapest CSPX Broker in Ireland 2026

CSPX charges 0.07% inside the fund. It's the same 0.07% at DEGIRO, Lightyear, Trading 212, every other Ireland-accessible broker. The bit you can change sits outside the fund — commission per buy, FX on the way in, custody for sitting still.

Not financial advice. The information on etf.ie is for educational purposes only and does not constitute financial, tax, or investment advice. ETF investing involves risk, including the possible loss of capital. Tax rules may change — always verify current Revenue guidance and consult a qualified financial adviser or tax professional before making investment decisions.

The short answer

• Lightyear is the cheapest for monthly buys at retail size — €0 execution and no FX on the EUR CSPX listing (you fund in euros, so there's no currency conversion).
• DEGIRO is the close runner-up at €1 per Core Selection trade on Tradegate in EUR. Twelve euro a year of pure broker cost on a monthly investor.
• "Commission-free" doesn't mean cost-free. Trading 212 and XTB both advertise €0 — and both quietly route your EUR through USD, charging 0.15% and 0.5% on every buy. On €500/month over 10 years that's €90 vs €300 of pure FX friction.
• Interactive Brokers becomes the cheapest above ~€2,500/month — the percentage commission undercuts DEGIRO's €1 floor and the FX is effectively zero.
• Davy Select is omitted — its €14.99-per-trade floor (and €500 minimum) makes monthly buys uneconomic until ~€3,000/month. Worth it only if you actively want the Irish tax pack.

Calculator

What CSPX actually costs you each month

Enter your monthly buy and how long you'll keep going. We compute total broker leakage (commission, FX, custody) across six Ireland-accessible brokers. Fund-level expenses (the 0.07% TER) are identical everywhere, so we strip them out and just show the bit you can change.

Monthly buy (€)

Years

Rank	Broker	Total cost	Per year

Cheapest-to-most-expensive gap

€0

over your horizon, pure broker friction with no fund-level cost difference.

Lowest total cost: Lightyear

Ranked on cost alone, and on this model the cheapest platform is the same whatever you enter. Check the tax-export column before you commit.

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Compare all 8 brokers

Fees verified against each broker's own fee page on 27 July 2026. Assumes one CSPX buy per month at the amount above. Lightyear and DEGIRO use the EUR listing so no conversion applies; T212, IBKR and XTB are modelled at their stated FX rates because their default routes go through USD for CSPX. Interactive Brokers is modelled with its USD 2.00 minimum per conversion (about €1.85), which at retail volume costs far more than its 0.002% headline rate. DEGIRO includes the €2.50 annual connectivity fee for the non-Irish venue. We model the brokers that publish a fee schedule and where we can confirm CSPX is available. That leaves out bunq, which does not publish which instruments it offers, and Davy Select, whose €15-per-trade floor makes monthly investing uneconomic below €3,000/month. Cheaper does not mean better: Davy Select is the only Irish-accessible broker that issues an Irish tax pack, and Interactive Brokers is the only one modelled here whose statement is straightforward to adapt to Form 11.

One practical limit this does not price in. A single share of this fund costs roughly €700, so a monthly budget below that only works on a broker offering fractional shares. Trading 212 and Interactive Brokers do. Lightyear does across most of its range but not every ETF. DEGIRO and IG do not, and XTB shows this particular fund as non-fractional, so on those three a monthly amount under about €700 buys nothing at all until you have saved enough for a whole share. Fractional support is set per instrument rather than per broker, so check the specific fund rather than the platform.

What we have confirmed, and what we have assumed (27 July 2026). This fund trades in different currencies on different exchanges: US dollars on the London Stock Exchange, euro on Xetra, Euronext Amsterdam and Borsa Italiana. So whether a conversion fee applies depends on which line your broker routes you to, not on the fund. Confirmed directly: DEGIRO offers it as SXR8 in euro on Tradegate at €1 per trade; Lightyear offers euro venues and charges nothing to execute ETFs; Trading 212 charges 0.15% only when the instrument is in another currency, and its Pies and AutoInvest force that conversion on recurring buys; Interactive Brokers applies a USD 2.00 minimum per conversion, but it offers the euro line (SXR8 on IBIS2) so a euro-funded account converts nothing; XTB lists the fund as SXR8.DE priced in euro at zero commission, so its 0.5% conversion fee does not apply either. The pattern that matters: nearly every broker here offers a euro listing, so conversion is usually avoidable and the real difference between platforms is per-trade commission, not FX. Not yet confirmed: which line IG routes to. IG alone is still modelled as though conversion applies, which overstates rather than understates its cost.

The real cost on each broker, broken down

Every number below is a stated rate on the broker's own website as of 26 May 2026 — not negotiated, not promotional. We model one monthly buy at the input amount, on the broker's default CSPX listing.

🥇 Lightyear

Cheapest at retail size

EU-listed UCITS ETFs trade free of execution and trading fees. Lightyear charges 0.35% on currency conversion, but it stocks CSPX on its EUR Euronext line — so funding in euros means no conversion and no FX fee at all. On €500/month for 10 years, your total broker cost is zero.

Lightyear Europe AS, regulated by Estonia's EFSA under EU passporting. €20,000 investor protection. No Irish-specific tax statement — you compute exit tax and deemed disposal yourself from raw exports, same as DEGIRO.

New Lightyear customers:Sign up and deposit €100 to get a random €10–€100 added as a free fractional share or ETF. Use code ETFIE.

Investing involves risk. Returns can vary and aren’t guaranteed. See full T&Cs.

See the Lightyear card →

🥈 DEGIRO

€12/year on monthly investing

CSPX sits in DEGIRO's Core Selection on Tradegate in EUR. The trade fee is €1 per buy — handling charge only, no commission, no annual custody. On a monthly investor that's €12/year, full stop. No FX, because the trade settles in your account currency.

BaFin-regulated, SPV-segregated assets, €100,000 cash + €20,000 investment cover. No Irish tax statement.

🥉 Interactive Brokers

Best above ~€2,500/month

0.05% commission on European ETFs with a €1.25 minimum. FX of ~0.002% — effectively free. The combination is brutal at scale: a €5,000 monthly buy costs €2.50 in commission and €0.10 in FX. Below ~€2,500/month, the €1.25 floor makes IBKR more expensive than DEGIRO.

CBI-regulated via IBKR Ireland — one of only two CBI-supervised options on this page. The Activity Statement gives per-disposal FIFO — the cleanest raw export of any broker here, even without an "Irish tax pack" stamp.

Trading 212

€0 trade, 0.15% FX

The headline is €0 commission — and it's genuinely zero. The fine print is that T212 routes CSPX through the USD line on LSE, so every EUR you deposit is converted at 0.15%. On €500/month over 10 years, that's €90 of friction you don't see on a trade confirmation. Pies (auto-invest) is the real reason to use T212; it's the only Ireland-accessible broker that auto-rebalances between funds for you.

German-regulated (BaFin), passported into Ireland. €100,000 cash deposit guarantee + €20,000 investor compensation. No Irish-specific tax statement.

XTB

€0 trade, 0.5% FX

Zero commission on ETF trades up to €100,000/month — but 0.5% FX, the highest of the five. On €500/month over 10 years that's €300 of pure friction, and the gap grows linearly with your contribution size. XTB makes more sense if you're using its 2,000-strong ETF range plus stocks, indices and CFDs from one account — not as a pure CSPX vehicle.

XTB Ltd, CySEC-regulated (CIF licence 169/12) and passported into Ireland, so not Central Bank of Ireland supervised. €20,000 Cyprus ICF cover. €10/month inactivity fee if you go 12 months with no trades and 90 days with no deposit — easy to avoid but worth knowing.

The FX trap nobody puts on a trade confirmation

"Zero commission" is the most-quoted broker line of the last five years. It's also the one most likely to misprice CSPX for an Irish investor.

CSPX exists in three flavours on European exchanges: a EUR line on Xetra (ticker CSPX), a EUR line on Euronext Amsterdam (also CSPX), and a USD line on the London Stock Exchange (ticker CSPX, traded in USD). Every broker picks one as their default route, and the choice decides whether you pay FX.

Same fund, same ISIN, different default route

Lightyear, DEGIRO: route to the EUR line — no FX applied.
Trading 212, IBKR, XTB: route to the USD line — every EUR you deposit gets converted before the buy, at the broker's stated FX rate.

The fund's NAV is the same. Your tax treatment is the same. But your broker takes a slice on the way in or out of dollars, and that slice multiplies by every monthly buy. The 0.07% TER inside CSPX is roughly twice what a €500 monthly XTB buyer loses to FX per year.

The fix on Trading 212 and XTB: there isn't one — you can't override the default route. If FX matters and you want commission-free, Lightyear is the cleaner answer. If you'd rather keep T212 (Pies are genuinely good) or XTB (broad instrument range), the FX is the price you pay for those features.

When the cheapest broker isn't the right broker

Cheapest is one axis. Three other things matter and neither Lightyear nor DEGIRO win them.

Tax-statement quality

Lightyear and DEGIRO give you raw transaction exports. You — or your accountant — work out gains, the 8-year deemed disposal, and the 38% exit tax. Interactive Brokers provides a per-disposal Activity Statement in FIFO format, the cleanest export of any broker on this page. Davy Select issues an annual Irish "tax pack" with gain per disposal in Form-11-friendly format. Neither files for you, but both meaningfully reduce the homework.

Irish regulation

Davy Select and Interactive Brokers are Central Bank of Ireland regulated. Every other broker on this page is EU-passported in from elsewhere (Germany for DEGIRO and Trading 212, Cyprus for XTB, Estonia for Lightyear). The €20,000 nominal investor-compensation ceiling is similar; the day-to-day reality of dealing with an Irish regulator if something goes wrong is not.

Auto-invest

Only Trading 212 auto-invests across multiple funds via Pies — useful if your portfolio is, say, 80% CSPX / 20% EIMI and you want monthly deposits split automatically. Every other broker on this page requires you to place each buy manually. For a one-fund CSPX investor that's a non-issue; for a multi-fund investor T212 buys back some of what it loses in FX.

The verdict

For monthly CSPX buys under €2,500, Lightyear is the cheapest answer. No commission, no FX on the EUR listing, no custody. The trade-off is the same trade-off you make with DEGIRO and T212: no Irish tax statement, EU-passported regulation, you do the Form 11 maths yourself.

Above €2,500/month, Interactive Brokers wins on cost alone — and brings the cleanest tax-export of any broker on this list as a bonus. If you can stomach the platform, the maths is decisive.

Avoid XTB unless you actively want the broader instrument range. The 0.5% FX on every buy is the second-largest line item in your annual CSPX cost after the 0.07% TER itself, and it's avoidable.

All cost figures are illustrative based on stated rates as of 26 May 2026. Fees change — verify on each broker's site before opening an account. Tax treatment described is for Irish-resident retail investors using a standard brokerage account; pension wrappers (Self-Directed PRSA, ARF) are taxed differently.

Related guides

How to buy CSPX from Ireland →

Once you've picked a broker, the actual steps: open account, deposit EUR, find CSPX by ISIN, place the buy.

Why CSPX over VOO →

The 15% US dividend WHT rate is worth ~€22,500 over 30 years on a €100k holding vs the 30% non-treaty rate.

Irish ETF tax guide →

38% Exit Tax, 8-year deemed disposal, no €1,270 exemption. The rules every CSPX buyer needs to know.

Best ETFs in Ireland →

CSPX isn't the only S&P 500 fund — SPYL is cheaper at 0.03% TER. And global-equity alternatives.

Frequently asked questions

Which broker is cheapest for buying CSPX in Ireland?

For monthly buys at typical retail volume, Lightyear is the cheapest, €0 commission and, because you fund in euros and buy the EUR-listed CSPX, no currency conversion and so no FX fee. DEGIRO is the closest paid alternative at €1 per Core Selection trade on Tradegate in EUR. Trading 212 and XTB are commission-free but route EUR through USD and charge 0.15% and 0.5% FX respectively, which adds up over years of monthly contributions. Interactive Brokers is competitive once monthly amounts exceed roughly €2,500 (where the percentage commission beats DEGIRO's €1 flat).

Does CSPX have FX fees in Ireland?

It depends on which exchange your broker routes the order to. CSPX trades in EUR on Xetra, Tradegate and Euronext Amsterdam, and in USD on the LSE. DEGIRO's Core Selection routes CSPX through Tradegate in EUR, no FX. Lightyear uses the Euronext EUR line. Trading 212, XTB and IBKR typically route through the USD line on LSE, applying their stated FX rate (0.15%, 0.5% and ~0.002% respectively) to every EUR you convert.

CSPX vs SPYL: which is cheaper for Irish investors?

SPYL (SPDR S&P 500 UCITS ETF Acc) has a lower TER, 0.03% versus CSPX's 0.07%, saving €40 per year on a €100,000 holding. Both are Irish-domiciled and qualify for the 15% US dividend withholding rate. CSPX is older, launched in 2010 against SPYL in 2023, and trades with deeper liquidity on every European exchange, though both are now large funds: SSGA put SPYL at $43.0bn in August 2026. For monthly contributions the spread on SPYL is wider on some brokers, narrowing the headline TER advantage. Most Irish investors pick CSPX for liquidity; SPYL wins on pure fund-level cost.

How is CSPX taxed in Ireland?

CSPX is taxed under the Irish Exit Tax regime: 38% on any gain at sale, or on the 8-year anniversary of each purchase (deemed disposal). There is no €1,270 annual exemption (that applies to CGT, not Exit Tax), and losses on one ETF cannot offset gains on another. Because CSPX is accumulating (dividends reinvest inside the fund), no annual income-tax event is triggered while you hold.

Is Lightyear available in Ireland for CSPX?

Yes. Lightyear Europe AS serves Irish customers under Estonian EFSA regulation, with €20,000 investor protection. CSPX is in their UCITS ETF range. Execution is free, and funding in euros to buy the EUR-listed line means no currency conversion and so no FX fee, meaning the calculator above will rank Lightyear as the cheapest broker for almost every retail-sized monthly buy.