Selling Cash-Secured Puts from Singapore: Where the 30% Withholding Actually Hits

If you sell cash-secured puts on US stocks from Singapore, the withholding you have probably been warned about will never touch your premium. Premium is not withheld at all. The 30% arrives later, on dividends, and only once assignment has made you a shareholder. And the bigger exposure isn't income tax.

Here is what Singapore residence does and doesn't cost you when you run the wheel on US names.

This is not tax advice, and you should not act on it. It is a general explanation, written to help you ask better questions. Tax outcomes depend on your own facts: your residence and domicile, how you hold the assets, how you finance them, how you trade, and how the rules read on the day you file. Rates, thresholds and treaty positions change. Before making any decision that turns on tax, take your circumstances to a qualified tax adviser or accountant licensed to advise in your jurisdiction. Where this article and a professional who knows your situation disagree, follow the professional.

Premium is not withheld

The US taxes non-resident aliens on FDAP income (fixed, determinable, annual or periodical) at a flat 30% where no treaty reduces it. Dividends are FDAP. So are interest, rents and royalties.

Option premium isn't. Premium received for writing an option counts as gain from the sale of personal property, which falls outside FDAP, and a non-resident alien's capital gains sit outside the US net anyway. Three things bring them back in:

• the gain relates to a US real property interest
• the income is effectively connected with a US trade or business you actively conduct
• you are physically present in the US for 183 days or more in the tax year, which puts US-source capital gains into a 30% charge

Run a wheel from a desk in Singapore and none of those normally apply. That is why your statement shows the full premium credited with no withholding line beside it, while dividends on the same account arrive short.

Dividends are

Singapore has no comprehensive income tax treaty with the United States. The one bilateral tax agreement between the two countries covers international shipping and aircraft operations, which doesn't reach portfolio income. There is no treaty article to claim, so the statutory rate applies in full.

Tax residence	Typical US withholding on portfolio dividends
Singapore	30% (no treaty)
United Kingdom	15%
Japan	10%

You still file a W-8BEN. It certifies that you are not a US person and prevents backup withholding at the higher domestic rate. What it cannot do is reduce your 30%, because there is no treaty rate to certify into. The form generally stays valid until the end of the third full calendar year after signing, so it needs renewing.

Assignment is the switch

While you are selling puts, you hold cash and an obligation. No dividend, nothing to withhold.

Once a put is assigned you own the shares, and every dividend is withheld at 30% until the stock is called away by a covered call. A wheel run on dividend payers will spend a fair portion of its life in that state. That is the design working, not a fault.

To put a number on it: assigned 100 shares of a US$60 stock yielding 2.5% is US$150 of dividends a year, of which US$45 never arrives. Against the premium on the same position that is a modest drag, not a thesis-breaker. But it does reduce yield on the capital you have committed, and it belongs in the arithmetic rather than turning up as a surprise on the statement.

What follows from it is narrow: from Singapore, weight dividend yield less heavily when choosing what to wheel than a US-based seller would. Not avoid payers, just stop treating the yield as a bonus. If the dividend was the reason for the position, the wheel was the wrong wrapper to begin with. You are there for the premium.

US estate tax

US-listed shares are US-situs assets. A non-resident, non-domiciled individual gets a US estate tax exemption of US$60,000, and tax on the excess runs at graduated rates reaching 40%. A US citizen or domiciliary has roughly US$15 million from January 2026.

Singapore has no estate tax treaty with the US either, so again there is nothing to claim.

This part tends to get skipped, and it matters more to option sellers than to most people for one specific reason. The standard mitigation offered to Singapore investors is to hold Irish-domiciled UCITS ETFs rather than US-listed securities: non-US situs, plus a 15% treaty rate on the underlying dividends at fund level. Sound advice for a buy-and-hold portfolio. Useless to a wheeler. UCITS funds have no US-listed options written on them, so you cannot sell a cash-secured put on one. Wheeling requires US-listed optionable underlyings, which means holding US-situs assets every time you are assigned.

There are recognised ways to approach this, involving how assets are held, insurance, or structures. All of them are estate planning rather than trading decisions. The point here is only that this exposure scales with the size of your account rather than how actively you trade, and a wheeler accumulating assigned shares accumulates it without noticing. Worth raising with an adviser well before the account gets large.

What Singapore taxes

Singapore doesn't tax capital gains, which is the reason this is a good place to run the strategy at all. No CGT when the covered call is exercised, none on the premium.

The qualification: IRAS separates capital gains, which aren't taxable, from trading income, which is, and decides between them using the badges of trade. Frequency of transactions, holding period, reason for sale, method of financing, whether the activity is your main source of income. No single badge settles it. Someone running a high-frequency options book as their livelihood sits somewhere different on that spectrum from someone selling a few puts a month against a long-term portfolio. If it is recharacterised, the result is Singapore income tax at progressive rates up to 24% for individuals.

This is not a warning that wheeling is taxable here. For most people running it as an investment strategy it isn't. It is a note that the boundary exists, that it turns on facts rather than a bright line, and that "Singapore has no capital gains tax" is a shorter sentence than the actual rule.

The short version

• Premium: not withheld. The common fear is misplaced.
• Dividends after assignment: 30%, no relief. Price it into your choice of underlying instead of fighting it.
• Estate exposure: unavoidable if you want optionable US underlyings, and worth planning for early.
• Singapore: no capital gains tax, with a facts-based boundary around trading income.

The FX and settlement side of running this from Singapore, including when premium actually lands and what T+1 means eight hours ahead of New York, is a separate set of mechanics.

At levelbox.ai we screen cash-secured puts on quality, premium and downside, showing the capital each candidate ties up next to its breakeven and maximum loss. We don't compute your tax. This post is educational and analytical, not investment advice, and certainly not tax advice. Tax outcomes turn on personal facts. The two questions worth taking to a qualified Singapore tax adviser are your own trading-income boundary and your US estate exposure.

Sources: IRS — FDAP income · IRS — Taxation of nonresident aliens · 26 U.S. Code § 871 · IRAS — tax treatment of gains from sale of assets