Six places Singapore retail investors quietly leak 1–2% per year

Singapore is one of the most thoughtfully-designed financial systems in the world. CPF, SRS, MAS, the broker ecosystem — they all push you toward saving and prudent investing. And yet most SG retail investors are quietly leaking 1–2% per year in places nobody talks about, because the people who should be telling you (your broker, your finfluencer, your robo-advisor) have economics aligned against telling you.

This post catalogues six of them. Plug three and you've earned a 1–1.5% raise on every dollar invested, every year, for the rest of your life. The math compounds brutally in your favor.

This is the biggest one. If you own SPY, QQQ, or VOO as a non-US resident Singapore investor, the US government withholds 30% of your dividends.

Compound any one of these over thirty years. That’s a house.The Ireland-domiciled equivalents — CSPX (S&P 500), EQQQ (Nasdaq 100), VWRA (FTSE All-World) — listed on the London Stock Exchange, settle the same exposure at a 15% withholding rate.

On a 2%-yielding US large-cap basket, that's a 0.3% pure drag from withholding alone, plus the long-tail compounding loss as those dividends would otherwise have been reinvested. The total drag, including reinvestment effects over a 30-year horizon, sits at roughly 1.0–1.5% annually.

On a SGD $200k portfolio, compounding 1.5% over 30 years means giving up approximately SGD $130,000 in terminal value, versus the Ireland-domiciled version. That's an HDB flat down payment, quietly forfeited because nobody told you to switch tickers.

The fix: replace SPY → CSPX, QQQ → EQQQ, VOO → VWRA (broader, includes ex-US). Done once. Saved forever.

The default savings account at a Singapore retail bank pays 0.05% per annum. T-bills auctioned by MAS regularly hit 3–4%. The gap is up to 3.95% per year on any cash you're holding.

For an emergency fund or short-term holding of SGD $50k, the leak is up to SGD $1,975/year — for doing literally nothing different except parking the cash in T-bills (via auctions on the IBKR or SGS website) instead of the savings account.

Money market funds and high-yield savings accounts (Stashaway Simple, Endowus Cash Smart, Mari Invest, etc.) sit in between at 2.5–3.5%, with daily liquidity. Pick one.

The fix: any SGD cash you won't touch for 90+ days lives in T-bills or a high-yield cash product, not the default deposit account.

The Supplementary Retirement Scheme lets you contribute up to SGD $15,300 per year (citizens/PR) or $35,700 (foreigners), and deduct the full contribution off your taxable income.

For a Singapore tax resident in the 11.5% bracket (earning between $80k–$120k), maxing the SRS saves $1,760 in tax per year. In the 15% bracket ($120k–$160k), $2,295. The 19% bracket gives back $2,907. Every year. Plus the contributions invest at whatever return you generate.

The fix: by 31 December each year, max the SRS contribution if you're a Singapore tax resident in any meaningful bracket. Invest the contributions in low-cost ETFs (you can hold them inside the SRS wrapper via brokerages like Endowus or Tiger). The tax savings alone often exceed the platform fees by 5–10x.

If you’ve maxed CPF and SRS but aren’t sure what to do next, the five-engine framework is the structural answer.

Retail SG brokers vary enormously in commission structures. The default DBS Vickers or POEMS rates are SGD $25 per trade minimum, ~0.28% commission. Tiger Brokers and Moomoo charge a fraction of that, sometimes zero on certain promotions. Interactive Brokers (IBKR) tiered pricing on US/UK/SG exchanges is among the cheapest available globally.

For an active investor doing 50 trades per year averaging SGD $5,000 each, the difference between DBS Vickers and IBKR could be SGD $1,000+/year in commissions alone — for trading the exact same assets.

The fix: any portfolio over SGD $10k that trades more than 6 times a year should be on IBKR, Tiger, or Moomoo, not a legacy bank brokerage.

Most brokerages and banks charge 0.3–1.0% on SGD↔USD conversions. IBKR's institutional FX rates are typically 0.002% — three orders of magnitude tighter.

On a SGD $50,000 conversion (e.g., funding a USD-denominated portfolio), DBS or Tiger Brokers' retail FX takes ~SGD $150–500 right off the top. IBKR's takes ~$1. Same trade.

The fix: convert SGD → USD via IBKR's FX trade function (not their auto-conversion at trade settlement, which uses retail rates). Saves the spread immediately.

The harshest leak, and the one you can't see on a bank statement. Studies of US retail brokerage accounts consistently show that the more frequently retail traders trade, the worse their returns versus buy-and-hold. The pattern repeats across markets and decades.

The two costs are (a) cumulative transaction fees and FX spreads, and (b) emotional reaction trades (selling at the bottom of a panic, buying at the top of a rally) which compound the wrong direction.

A study by Barber and Odean of 65,000 retail brokerage accounts found that the most active 20% of traders underperformed the least active 20% by 6.5 percentage points per year, almost entirely due to (a) and (b).

The fix: a written ruleset. Define when you'd enter, when you'd exit, what conditions would make you cut. If you can't articulate it, you're not investing — you're hoping. And hoping costs 6.5% per year.

Add the six up at conservative levels: 1% + 0.5% + 0.4% (SRS tax savings on portfolio basis) + 0.2% + 0.1% + 0.5% = 2.7% per year of recoverable drag.

A SGD $100,000 portfolio earning 5% net instead of 7.7% net, compounded over 30 years, leaves SGD $432,000 on the table.

You don't need to find better stocks. You don't need to time the market. You just need to stop bleeding.

If you want the weekly version of this — what's compounding, what's leaking, and what to do about it from the Singapore retail seat — subscribe in the box on the homepage. New issue every Sunday morning SGT.