Singapore Active Investors’ Guide to Trading Platform Fees: Tiger Brokers vs Moomoo vs Interactive Brokers and More

Key Cost Components Every Active Investor Should Know

Before comparing platforms one by one, it’s worth mapping out every cost line that eats into an active trader’s return. In Singapore, the headline commission for a trade on SGX is rarely the full story. You need to look at five layers:

Commissions – usually a percentage of trade value with a minimum per order, or a flat fee per share for US stocks. High-frequency traders care deeply about the minimum charge; a SGD2.88 minimum on a SGD1,000 trade is already 0.288%, far above the advertised 0.08%.

Clearing, exchange and regulatory fees – these are passed through by all brokers and are nearly identical. But how they are quoted matters. Some brokers wrap them into an all-in figure; others quote a clean commission and then add pass-throughs on the contract note.

Currency conversion costs – the silent killer for anyone trading US or HK stocks from a SGD base. Most zero-commission or low-commission platforms make their money on the forex spread. IBKR gives you spot rates with a transparent 0.03% markup, while some fintech brokers hide a 0.5%–1% spread in the exchange rate.

Platform and custody fees – thankfully less common now, but some older platforms still charge quarterly custody fees or inactivity fees. In Singapore, most mainstream brokers have scrapped these, but it pays to check the fine print.

Margin and financing rates – for investors who use leverage, the interest rate on the borrowed amount can dwarf all other costs combined. IBKR’s benchmark rate + 1.5% for SGD borrowing can be as low as 4%–5%, while other brokers routinely charge 6%–8%.

By understanding these five layers, you can look past marketing slogans like “free trades” and see which platform genuinely offers the lowest total cost for your specific trading pattern.

Platform-by-Platform Fee Breakdown: Tiger Brokers, Moomoo, Interactive Brokers, and Others

Here’s a snapshot of how the most popular trading platforms among Singapore active investors stack up on core fees. The data reflects publicly available standard pricing as of the second half of 2026. Promotional rates (e.g., lifetime free commissions) are noted separately because they can change.

• SGX stocks (commission): 0.08%, min SGD2.88 · 0.03%, min SGD1.50¹ · 0.08%, min SGD2.50 (fixed); tiered as low as 0.02% for high volume · 0.025%, min SGD0.80² · From 0.10%, min SGD10³
• US stocks (commission): USD0.005/share, min USD1.99 · USD0.0049/share, min USD0.99 · USD0.005/share, min USD1.00 (fixed); tiered USD0.0035/share · USD0 (free)⁴ · USD0.02/share, min USD10
• Currency conversion fee: Spread ~0.3%–0.5% (built into rate) · Spread ~0.3%–0.5% (built into rate) · 0.03% of spot (minimum USD2.00) · Spread ~0.3%–0.5% (built into rate) · Spread ~0.5%–0.6%
• Platform / custody fees: None · None · None (USD10/month if <USD100k and no trades, waived otherwise) · None · None
• SGD margin rate (approx.): 6.8%–7.5% · 6.8%–7.5% · 4.0%–5.0% (BM + 1.5%) · Not fully launched yet · Not applicable for Invest account

¹ Moomoo SG has occasionally run a lifetime 0-commission offer for SGX stocks; check current eligibility. ² Webull is expanding in Singapore and promotional pricing may apply. ³ CMC’s standard fee is high; its active trader plan reduces it, but volume requirements apply. ⁴ Webull US stocks currently free for Singapore accounts, subject to change.

This table reveals a clear pattern: for SGD-denominated trades, Moomoo and Webull offer the lowest headline cost, while for multi-currency trading, IBKR’s near-spot forex and tiered commissions become increasingly powerful. Tiger Brokers sits in the middle, blending a polished mobile experience with moderately competitive fees.

Commission Comparison Across Asset Classes: SGX, US Stocks, HK Stocks and ETFs

Not all trades are created equal. An active investor might run a short-term US stock position one day and a long-term SGX REIT the next. Here’s how the commission picture shifts by asset class.

SGX stocks and REITs

For local stocks, the contest is all about the minimum fee. If you trade in parcels of SGD5,000–10,000, Tiger Brokers’ 0.08% and Moomoo’s 0.03% look very close in percentage terms once the minimum is satisfied. But for smaller trades—say SGD1,500—Moomoo’s min SGD1.50 beats Tiger’s SGD2.88 cleanly. Interactive Brokers’ fixed plan charges SGD2.50 minimum, putting it between the two; if you qualify for tiered pricing (volume above 300,000 SGX shares/month), IBKR can become cheaper than any retail fintech. If you trade ETFs like the STI ETF, some brokers offer zero-commission for selected ETFs, so check the product list.

US stocks and ETFs

For US equities, fractional shares are a bonus, but costs matter. Webull currently has zero commission on US stocks in Singapore, making it an obvious cost winner for now. Moomoo charges USD0.99 minimum, Tiger USD1.99, IBKR USD1.00 (fixed). But here’s where active traders need to zoom out: if you are converting SGD to USD on the same platform, Moomoo and Tiger’s forex spread adds roughly 0.5% to every round-trip transaction. On a USD10,000 trade, that’s an implicit USD50 cost—far more than the commission. IBKR’s razor-thin 0.03% forex fee plus tiered commissions often yields the lowest all-in cost for US stocks once you trade above USD2,000–3,000 per lot.

Hong Kong stocks

Tiger and Moomoo both charge 0.03% on HKEX, with minimums of HKD18 and HKD3 respectively. IBKR’s fixed plan starts at 0.08% min HKD18, but tiered can go much lower. For HK-listed tech names popular with Singapore investors, Moomoo’s low minimum is attractive for small trades, while IBKR wins for larger volume.

ETFs and regular savings plans

CMC Markets allows one free buy order per day per ETF (up to USD1,000) for select US and SGX ETFs, an interesting option for dollar-cost averaging. Moomoo and Tiger also run periodic promotions on certain ETFs. However, if you’re an active ETF trader executing multiple trades a day, those free entries typically have limits, and you’ll revert to the standard commission.

Bottom line: For pure commission cost on small local trades, Moomoo or Webull lead. For medium-to-large US and HK trades, IBKR’s tiered pricing and forex edge make it the total-cost-of-trading champion.

The Hidden Cost of Currency Conversion: Who Gives You the Best SGD to USD Rate?

Among Singapore active investors, currency conversion cost is the most underestimated fee. If you trade US stocks with a Singapore-dollar funded account, every buy and sell involves a currency conversion unless you hold a multi-currency balance. Many investors don’t check the exchange rate they got—they only look at the commission.

Interactive Brokers is in a league of its own here. It connects directly to the interbank forex market, and charges a flat 0.03% (minimum USD2) on the spread. During London/NY overlap hours, you effectively get the spot rate plus a sliver of cost. Convert SGD10,000 to USD and you lose about USD3. Convert SGD100,000 and you lose USD30. The platform even allows you to hold multiple currency balances and convert on your own schedule.

Tiger Brokers and Moomoo, by contrast, package the conversion cost into a widened spread. Based on independent user comparisons across several trading communities, the effective cost typically ranges from 0.3% to 0.5% each way. That means a round-trip SGD-to-USD-to-SGD cycle can cost 0.6%–1.0% of your capital. For an active trader who turns over a USD100,000 portfolio multiple times a year, this can amount to hundreds or thousands of dollars in hidden fees.

Webull’s forex model is similar to Moomoo and Tiger, with the spread embedded. CMC’s Invest account also applies a spread of around 0.5%–0.6%.

What’s the practical takeaway? If you trade US stocks frequently and their total value exceeds SGD20,000 per year, opening an IBKR account solely for better forex rates can pay for itself even if you continue using another platform for SGX stocks. Some savvier investors even use one broker for SGD-denominated assets and IBKR for US and HK markets, transferring funds between them via FAST transfers.

Platform Fees, Custody Charges and Data Subscriptions for Active Traders

Thankfully, the era of custody fees is largely over for Singapore retail investors. Tiger Brokers, Moomoo, Webull and CMC charge no platform or custody fees. IBKR does have a monthly activity fee of USD10 if your account equity is below USD100,000 and you do not generate at least USD10 in commissions that month—but this fee is waived if you are 25 or younger, or for accounts with USD100,000 or more. For an active investor making several trades a month, you’ll naturally generate enough commissions to avoid the fee.

What still catches people off guard are data subscription fees. Real-time US Level 2 data, SGX live prices, and HKEX market depth are typically charged monthly by exchanges. Most platforms pass these on with a small markup. Tiger and Moomoo offer free delayed data, and free real-time SGX data with a funded account. IBKR charges for many real-time data packages but also provides Snap Quote credits that can offset the cost. An active trader likely needs at least US Level 1 data and SGX real-time data; these can add up to USD15–25 monthly across platforms. Check each platform’s data fee schedule before signing up for a heavy trading month.

Another often-overlooked charge is the GST on brokerage fees. In Singapore, brokerage commissions are subject to 9% GST. When a platform quotes “SGD2.88 minimum,” the final debit is usually SGD3.14 after GST. The logic applies uniformly, but it’s a useful mental adjustment when comparing against net-of-tax returns.

Which Platform Suits Your Trading Style? Matching Frequency, Asset Mix and Account Size

With all the numbers on the table, the right choice depends on your trading profile. Here’s a quick mapping:

• The low-frequency SGX dividend investor (5–15 trades/month, mainly REITs and banks): Moomoo or Tiger Brokers. The streamlined mobile interface and low minimums make small, regular local trades cost-efficient. If you only buy SGD stocks and do no forex conversion, IBKR’s forex advantage means little to you.
• The active multi-asset trader (20–80 trades/month, mixing US, HK and SGX): Interactive Brokers. The tiered commission structure plus ultra-low forex spreads will easily save you 1%–2% of turnover per year compared with fintech brokers. The desktop platform (TWS) has a steeper learning curve, but the cost advantage is real. Webull’s free US stocks could supplement for US-only strategies, but check the forex cost.
• The US-stock swing trader with a medium account (SGD50k–150k): A hybrid approach works well. Use IBKR for currency conversion and US/HK stock execution, and keep SGX trades on Moomoo or Tiger if you prefer the mobile experience. FAST transfers between Singapore bank accounts make it easy to move funds.
• The margin user: IBKR is almost impossible to beat. Its SGD margin rate of around 4%–5% is roughly half what Tiger and Moomoo charge. Over a year, that difference on a SGD100,000 loan is SGD3,000–4,000, far outweighing any commission savings elsewhere.

One final thought: many active investors obsess over commissions while ignoring the bid-ask spread and execution quality. IBKR’s smart routing often gets better price improvement than zero-commission brokers that route flow to market makers. While difficult to quantify upfront, execution quality can easily add or subtract tens of basis points per trade—something to keep in mind when your turnover is high.

FAQ

Which platform has the lowest total cost for Singapore active investors trading US stocks? For accounts above USD10,000 in monthly volume, Interactive Brokers generally offers the lowest total cost because of its near-spot currency conversion (0.03%) and tiered commissions. Webull’s zero-commission US stock offer is attractive for small trades, but the hidden forex spread adds cost once you convert SGD to USD on the platform.

Do Tiger Brokers and Moomoo really charge no forex fee? They advertise “no currency conversion fee,” but the exchange rate you receive includes a mark-up. Independent tracking shows an effective spread of roughly 0.3%–0.5% each way compared with interbank rates. This is how the platform earns revenue on currency swaps.

Is Interactive Brokers suitable for beginners? IBKR’s Trader Workstation can feel complex, but its mobile app and Client Portal have improved significantly. Beginners who trade infrequently may find Tiger or Moomoo more intuitive, but for anyone willing to spend a few hours learning, IBKR’s cost savings make it worthwhile.

What about other platforms like Saxo or CMC Markets? Saxo charges higher minimum commissions and forex spreads, making it less suitable for most active retail investors unless you need access to futures and bonds. CMC’s Invest platform is more competitive for ETF regular savings plans, but its standard commissions and forex spreads are steeper than the fintech peers.

How do I avoid the IBKR monthly activity fee? Make sure your account equity is at least USD100,000, or generate USD10 in commissions per month (roughly 10 US stock trades at the fixed rate). The fee is also waived for account holders aged 25 and under.

Are my assets safe with these platforms? All the brokers mentioned are regulated by the Monetary Authority of Singapore (MAS) or equivalent top-tier regulators. Tiger, Moomoo and IBKR segregate client assets in custodial accounts. IBKR additionally offers up to USD500,000 investor protection (SIPC) on US securities. Nonetheless, always check the latest investor protection scheme details.

Summary

For Singapore active investors, the cheapest platform on paper often isn’t the cheapest in practice. Headline commissions can distract from the much larger costs of currency conversion, margin interest and execution quality. This comparison shows that interactive Brokers delivers a hard-to-match total cost advantage for anyone trading US and HK stocks, using margin, or moving significant sums between currencies. Tiger Brokers and Moomoo shine for local SGX trades and offer approachable mobile experiences, while Webull’s zero-commission US stocks are attractive for smaller accounts. The smartest approach is often a two-platform setup: one for SGD assets and one for multicurrency efficiency. Pick the combination that aligns with your monthly trade frequency, account size and asset mix, and revisit your costs at least twice a year—promotions expire and pricing tiers evolve.