Dry powder · position 7 of 11

Where idle cash sits

Baht or dollars for money you might need within a few years?

Hold Keep what you have; nothing here argues for changing it

Split it. Money you will spend in Thailand within about five years stays in baht; genuinely long-horizon idle cash earns materially more in dollars, and you are paid to wait.

−100 · argues against +17 argues for · +100
Conviction: high — most of the evidence for this is available and pointing the same way

The job Dry powder

Money that is deliberately doing nothing, so that it is available on the day everything is cheap.

The argument

The carry gap is -264 basis points — Thai policy at 1.00% against US overnight money at 3.64%. Held in a baht savings account, idle money earns close to nothing. Held in dollars, it earns several times that. Over a few years that difference compounds into something that matters.

The catch is not subtle and should not be minimised: you spend baht. A dollar deposit that earns four points more and then loses six points on the exchange rate has lost you money in the only currency that buys groceries. This is why the split matters more than the rate — the interest advantage is real, and it is only worth taking on money whose spending date is far enough away that the exchange rate has time to be irrelevant.

Practically, a foreign currency deposit at a Thai bank is the cleanest route: it holds dollars without an offshore account or an outward transfer, and there is no balance cap for residents. Interest is taxed at 15%. Watch the tier tables — advertised rates of "4%" and "4.50%" seen at some banks are undated promotions, and at least one applies only to the first US$2,000.

If you already have an offshore account, a short US Treasury bill fund does the same job at 0.07% a year with no bank credit risk at all.

Evidence What produced this stance

The stance is a starting point produced by arithmetic, not by an opinion. Every reading behind it is printed below with its value and where the value came from; if you disagree with a reading, the stance it produced is worth disagreeing with too.

Carry gap, Thai policy rate minus US overnight -264bp DERIVED argues for

Dollar overnight money pays 3.64% and Thai policy pays 1.00%. Idle savings earn far more in one currency than the other, and the gap is wide enough that it is not a rounding difference.

Dollar against the baht, versus its 2016 average 33.55 LIVE no push

Buying dollars is cheaper when the dollar is cheap. This partly offsets the interest advantage and partly reinforces it, depending on where the rate sits.

Currency you actually spend baht STATIC argues against

This weighs against the interest advantage permanently, not occasionally. Rent, school fees and groceries are settled in baht, so a dollar deposit is a bet on the exchange rate wearing an interest rate as a disguise. It is counted here rather than only mentioned, which is why a wide carry gap on its own does not push this past a split.

Direction of both policy rates awaiting history AWAITING not available

The carry gap is a snapshot. Whether it widens or closes depends on two central banks, and nothing here forecasts either.

What would change this. The carry gap narrowing back inside −150bp removes most of the reason to hold dollars for yield. A dollar above 37 baht makes buying them expensive enough to wait.

The flip is named in advance on purpose. A stance that can only be explained after it changes is a story; a stance that names its own reversal beforehand can be held honestly, and can be checked later against what actually happened.

The score is the strength of the argument among the evidence that is currently available, from −100 to +100. It is not a forecast, a probability or an expected return. Anything between −30 and +30 is a genuine shrug and leaves the stance where it started.

The conviction says how much of the evidence exists yet. Most of this dashboard's composite gauges need five years of stored history before they mean anything, and the pipeline has been running for weeks. A reading that cannot be computed is shown as unavailable and counts for nothing — it is never quietly scored as neutral.

How Reaching this from Thailand

The routes are the ways this is actually reachable from Thailand. They are not equivalent. The same fund bought through a Thai broker and through an offshore account attracts different tax, different limits and, in one case, a US estate tax exposure that has nothing to do with the fund itself.

Thai brokerage A normal Thai share-trading account

Buys anything listed on the SET, in baht, with no money leaving the country. The simplest route and the one with the fewest tax surprises.

What to ask for What it is Ccy Ongoing charge Why this one
BONDUS01 DR on Premia US Treasury Floating Rate ETF
Short US government debt whose interest resets with rates — dollar income without a dollar account.
THB A baht-traded receipt on floating-rate US Treasuries, if you want it through a Thai broker.
Frictions: dr_wht, dr_structure, fx_thb

Thai bank A deposit account at a Thai bank

Baht savings and fixed deposits, plus foreign-currency deposits. Not an investment so much as a place to park money with a known rate.

What to ask for What it is Ccy Ongoing charge Why this one
USD FCD US dollar foreign currency deposit
Dollars held at a Thai bank — a way to own the currency without an offshore account.
USD 0.00% Dollars at a Thai bank. No offshore account, no transfer, 15% tax on the interest.
Frictions: fcd_wht, fx_thb
THB savings Thai baht savings account
Instant-access baht at roughly 0.25% at the major banks; digital accounts pay more on a capped first tranche.
THB 0.00% Baht savings at roughly 0.25%. Low, and the right place for money you will actually spend here.

Offshore broker An international broker account

Wider choice and lower fees, but the money leaves Thailand, which brings in the outward-investment limit, the remittance rules on the way back, and — for US-listed funds — US estate tax.

What to ask for What it is Ccy Ongoing charge Why this one
IB01 iShares $ Treasury Bond 0-1yr UCITS ETF (Acc)
US government debt maturing within a year — dollar cash that earns the dollar rate.
USD 0.07% US Treasury bills under a year, Irish-domiciled, 0.07% — dollar cash with no bank behind it.
Frictions: fx_thb, remittance, bot_outward_limit

Instrument details were verified against issuer and exchange pages on 2026-07-25. Tickers, ongoing charges and listing lines change; confirm before dealing. Where a charge shows as the published figure could not be confirmed and none is invented here.

Dates Things on a clock

A window that closes is the one kind of item on this dashboard where doing nothing is itself the decision. Each date below is published by the issuer or the authority named, not inferred.

30d

Bank of Thailand rate decision

Closes 2026-08-26

The Monetary Policy Committee meets on 26 August 2026. The policy rate — the 1-day bilateral repurchase rate — stands at 1.00% after meeting 3/2026 on 24 June voted 7-0 to hold. The remaining 2026 meetings are 26 August, 28 October and 23 December. This matters for a baht saver in two directions at once: it sets what deposits pay, and the gap between it and US rates is most of what moves the exchange rate.

The next policy rate decision is 26 August. The rate is 1.00% and the last vote was unanimous to hold.

Friction What this costs regardless

The frictions are the parts that cost money or attention regardless of whether the argument is right: tax, transfer limits, deadlines, structure. For most people most of the time they matter more than the market reading does.

Foreign-currency deposit interest — 15%

tax
Interest on a foreign-currency account at a Thai bank is taxed 15%.

Foreign currency deposit accounts are available to residents at all the major Thai banks and are a clean way to hold dollars without leaving the domestic banking system. Interest is subject to 15% withholding. There is no balance cap for residents; cash deposits of banknotes are capped at US$15,000 per person per day. Advertised rates of '4%' and '4.50%' seen at some banks are undated promotional teasers and in at least one case apply only to the first US$2,000 — read the tier table before assuming the headline.

Verified 2026-07-25 · https://www.bot.or.th/en/statistics/interest-rate.html

You spend baht

structural
A foreign asset can rise in its own currency and still lose you money in baht.

Every unhedged foreign holding is two bets: the asset and the exchange rate. Over a decade the exchange rate mostly washes out; over the two or three years in which someone actually needs the money it frequently does not. This is not an argument against foreign assets — it is an argument for keeping the money you will spend within five years in the currency you will spend it in.

Verified 2026-07-25 · https://www.bot.or.th/en/statistics/exchange-rate.html

Foreign income is taxed when you bring it in

tax
Money earned abroad from 2024 onward is taxable in Thailand in whatever year you remit it — the widely-reported 2025 relaxation was never actually enacted.

Departmental Instruction Por 161/2566, as amended by Por 162/2566, remains the law as at 25 July 2026. Foreign-sourced income earned from 1 January 2024 onward is assessable in Thailand when it is brought into the country, in any later year — not only in the year it was earned. Income earned before 2024 is grandfathered out entirely. The residence test that matters is applied in the year of remittance: money brought in during a year you spent fewer than 180 days in Thailand is not caught, even if it was earned in a resident year. The relaxation announced in 2025 and repeated widely since was verified negatively against the Revenue Department's own registers — Royal Decrees run to No. 805 of 4 March 2026 with none touching Section 41, and departmental instructions run to Por 164/2568 with none touching foreign-sourced income. Parliament was dissolved ahead of the February 2026 election and the proposal is shelved. Foreign tax credits exist only under a double tax agreement.

Verified 2026-07-25 · https://www.rd.go.th/fileadmin/user_upload/kormor/newlaw/di161.pdf

Context The other ten positions