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 many 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. Address three of these and you could meaningfully reduce your structural drag — the math compounds materially in your favor.

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

Ireland-domiciled equivalents covering the same indices exist and are listed on the London Stock Exchange — these generally carry a 15% withholding rate for Singapore-resident investors rather than 30%.

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 estimated drag, including reinvestment effects over a 30-year horizon, sits at roughly 1.0–1.5% annually — actual figures depend on dividend yield, reinvestment timing, and individual circumstances.

On a SGD $200k portfolio, compounding 1.5% over 30 years means giving up approximately SGD $130,000 in terminal value versus a lower-withholding equivalent. These are illustrative figures — actual results depend on portfolio composition, dividend yield, and market conditions. That is a substantial compounding difference over a long horizon.

What to investigate: whether the ETFs in your portfolio are US-domiciled or Ireland-domiciled, and what withholding tax rate applies to your dividends. The domicile and tax treatment of any ETF should be verified before investing. Address this once and the structural drag is reduced going forward.

The default savings account at a Singapore retail bank pays 0.05% per annum. T-bills auctioned by MAS have in recent periods offered meaningfully higher yields — check current MAS auction results for the latest figures. The gap between a standard savings account and available alternatives can be substantial on any cash you're holding.

For an emergency fund or short-term holding of SGD $50k, this gap represents a meaningful annual opportunity cost — for doing literally nothing different except moving the cash into a higher-yielding product.

Money market funds and high-yield savings accounts sit between T-bill rates and standard savings rates, typically with daily liquidity. Rates vary by product and market conditions — worth comparing against current T-bill yields.

What to investigate: where your idle SGD cash is currently parked, what it's earning, and what alternatives exist at your required liquidity level. Current T-bill yields are published by MAS after each auction.

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.

What to investigate: whether you're maximising your SRS contribution before 31 December each year, and how the tax saving compares to your current bracket. SRS-approved brokerage platforms allow you to invest SRS funds in various assets within the wrapper. Check IRAS guidelines and your own tax situation before contributing — this is general educational information, not tax advice.

Retail SG brokers vary enormously in commission structures. Legacy retail bank brokerage rates typically carry higher minimum commissions and percentage fees. Newer platforms and internationally-licensed brokers often charge significantly less for the same trade.

For an active investor doing 50 trades per year averaging SGD $5,000 each, the difference between a higher-cost and lower-cost platform could easily reach SGD $1,000+ per year — for trading the exact same assets. Note: specific fee figures change frequently. Always check current published fee schedules from the relevant broker.

What to investigate: compare published commission schedules across MAS-licensed brokers for your typical trade size and frequency. For investors doing meaningful trade volumes, the difference in annual commissions between a legacy bank brokerage and a lower-cost platform is often significant — and the assets traded are identical.

Most brokerages and banks charge 0.3–1.0% on SGD to USD conversions. Some brokers offer institutional-rate FX execution with spreads dramatically tighter than retail bank rates — often orders of magnitude cheaper on equivalent conversions.

On a SGD $50,000 conversion to fund a USD-denominated portfolio, the difference between a retail bank FX rate and an institutional-rate broker FX execution can be SGD $150–500 on a single conversion. These are illustrative figures — actual rates vary by platform and market conditions.

What to investigate: how your brokerage or bank executes SGD to USD conversions, what rate methodology they use, and whether there are lower-spread alternatives available through MAS-licensed brokers. Some platforms execute FX automatically at settlement — others allow a separate FX instruction at a different rate. The method matters.

The harshest leak, and the one you can't see on a bank statement. Research on retail brokerage accounts has found a consistent pattern: more frequent trading tends to produce worse net returns, largely due to compounding transaction costs and emotionally-driven timing decisions. One widely cited study by Barber and Odean analysed 65,000 retail brokerage accounts and found that the most active 20% of traders underperformed the least active 20% by approximately 6.5 percentage points per year in US markets — a pattern observed 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.

What to measure: how often you trade, and why. If you can articulate the logic and exit conditions for each position before entering, you're making deliberate decisions. If the reasoning only arrives after the trade, it is worth examining whether emotion rather than analysis is driving the decision.

For illustration only — actual drag depends on individual portfolio composition, trading frequency, and market conditions. At conservative estimated levels: 1% (ETF domicile) + 0.5% (idle cash) + 0.4% (SRS tax savings on portfolio basis) + 0.2% (broker fees) + 0.1% (FX spreads) + 0.5% (overtrading) = approximately 2.7% per year of potentially recoverable drag.

A SGD $100,000 portfolio earning 5% net instead of 7.7% net, compounded over 30 years, leaves approximately SGD $432,000 in the illustrative difference. These are not projections — they are estimates using simplified assumptions.

You don't need to find better stocks. You don't need to time the market. You just need to reduce structural drag.

If you want a structured way to audit these leaks in your own portfolio, the Singapore Portfolio Leak Scorecard is free by email.