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.
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 five 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.
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 sizeEU-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.
🥈 DEGIRO
€12/year on monthly investingCSPX sits in DEGIRO's Core Selection on Xetra 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, IBKR sub-custodian, €100,000 cash + €20,000 investment cover. No Irish tax statement.
🥉 Interactive Brokers
Best above ~€2,500/month0.05% 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% FXThe 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% FXZero 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.
CySEC-regulated, EU passported. €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
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.