Got some spare cash sitting around? Maybe it’s earning little in your savings account, but you’re not quite ready to ride the ups and downs of stocks either. A fixed deposit can be a familiar middle ground: you lock your money away for a set period and earn a fixed interest rate.
Fixed deposits don’t have to be in Singapore dollars. USD fixed deposits let you deposit US dollars for a fixed tenure and earn a fixed interest rate, which can sometimes be higher than what you’d get from an SGD fixed deposit.
There’s just one catch though: exchange rates.
If your starting point is SGD, you’ll need to convert your money into USD first. So even if the USD fixed deposit offers a higher interest rate, changes in the exchange rate could affect how much you actually get back when you convert your money to SGD.
So, is the extra interest worth the currency risk? Here are 10 questions to help you figure it out.
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1. How does a USD fixed deposit work?
If you already know how an SGD fixed deposit works, there isn’t much new here. You place a lump sum with the bank, choose a tenure such as 3, 6 or 12 months, and earn a fixed interest rate while your money is locked in.
With a USD fixed deposit, the main difference is the currency. Your deposit goes in as US dollars, your interest is paid in US dollars and your maturity proceeds come back in US dollars too.
What happens before and after the fixed deposit depends on what currency you’re starting with:
- Already have USD? You can place those US dollars directly into the fixed deposit.
- Only have SGD? You’ll need to convert your Singapore dollars into USD first.
- Want your money back in SGD? Your USD maturity proceeds will need to be converted back into Singapore dollars.
Opening a USD fixed deposit doesn’t mean you’re sending your money overseas. Banks such as UOB and DBS offer foreign-currency fixed deposits in Singapore.
2. Do I need a US bank account to open one?
Nope. You don’t need an American bank account just because your fixed deposit is denominated in US dollars.
You can open a USD fixed deposit with a bank in Singapore, although you may need an eligible savings, current or foreign-currency account with the bank first. Minimum placement amounts can also vary depending on the bank, currency and tenure.
Starting with SGD isn’t a problem either. Say you want to put S$30,000 into a USD fixed deposit. The bank converts your S$30,000 into USD at its prevailing exchange rate, and those US dollars become your fixed deposit principal.
When the deposit matures, you’ll get that USD principal plus the interest earned. If you’re happy to keep the money in USD, that’s where it ends.
But if you want your money back in Singapore dollars, you’ll need to convert it again. And that second currency conversion is where the main trade-off with USD fixed deposits comes in.
3. How much more can a USD fixed deposit earn?
Here’s probably why you’re looking at USD fixed deposits in the first place: the interest rate.
As at 24 September 2026, UOB’s foreign-currency fixed deposit rates showed 3.40% p.a. for a 6-month USD fixed deposit below US$50,000. By comparison, SGD fixed deposit rates have generally been lower, although rates and promotions can change regularly.
You can check MoneySmart’s fixed deposit comparison and latest fixed deposit rates in Singapore for current offers.
But before you assume the higher USD rate means more money in your pocket, let’s put the numbers side by side.
Say you have S$30,000 and are comparing the USD rate above with an SGD fixed deposit paying 1.50% p.a. for 6 months:
Assuming the exchange rate stays unchanged and excluding currency conversion costs.
The gap between 1.50% and 3.40% looks pretty sizeable on paper. But translate those percentages into actual dollars, and the difference is more modest: you’re looking at roughly S$285 in extra interests over 6 months on S$30,000.
That S$285 is the number worth keeping in mind. It gives you a much better sense of what you’re actually getting for taking on the extra currency risk and hassle of converting between SGD and USD.
ALSO READ: Top 10 ETFs in Singapore—The Total Beginner’s Guide to Investing in ETFs (2026)
4. How can the USD/SGD exchange rate affect my return?
Here comes the part you don’t have to worry about with an SGD fixed deposit.
If you start with S$30,000 and eventually want Singapore dollars back, your money makes a round trip:
S$30,000 → USD → USD fixed deposit → USD + interest → SGD
The first conversion determines how many US dollars actually go into your fixed deposit. The second determines how many Singapore dollars you eventually get back.
For instance, the USD weakens against the SGD during those 6 months. You’ll still earn the interest promised by the bank, but each US dollar will be worth fewer Singapore dollars when you convert your money back. If the USD strengthens instead, the reverse can happen — you could get more SGD for the same amount of USD.
Then, there’s the exchange-rate spread. The rate your bank offers when you buy USD and the rate it offers when you sell USD may differ from the mid-market rate you see online. That difference can eat into your returns too.
While your interest rate in USD is fixed, your eventual return in SGD isn’t.
It’s the same currency trade-off Singapore investors face when buying US stocks or overseas ETFs: an investment can perform well in USD, but the amount you ultimately get in SGD can look quite different after the currency conversion.
5. How much can USD fall before the higher interest is wiped out?
Remember the S$285 of extra interest from our earlier example? Think of it as your cushion against currency movements and conversion costs.
Once currency movements and conversion costs eat up that S$285, the higher USD interest rate has effectively lost its advantage over the SGD fixed deposit.
You don’t need to predict exactly where USD/SGD will be 6 months from now to understand the trade-off. If you’re converting SGD into USD purely to chase the higher fixed deposit rate, the more useful question is: how much currency movement can that extra interest absorb?
If the currency moves against you by more than that, the higher USD interest rate may no longer leave you better off in SGD terms.
Already have US dollars? The calculation changes quite a bit, because you may not need to convert SGD into USD in the first place. We’ll get to that in Question 7.
6. What else can I do with the money for 6 months?
Maybe the question isn’t really USD vs SGD. You simply have S$30,000 that you probably won’t need for the next 6 months, and you’re looking for somewhere better to park it than your regular savings account.
A USD fixed deposit is one option, but it’s far from the only one. You could also consider an SGD fixed deposit, T-bills, Singapore Savings Bonds or other short-term options, depending on how much access you need to the money and what return you’re looking for.
The bigger question is what happens after those 6 months.
Got a renovation payment, wedding bill or tuition fee coming up? Knowing exactly how much you’ll have when the bill arrives may matter more than squeezing out a few extra dollars of interest.
If you won’t need the money for several years, you may have more room to consider investments and ride out market ups and downs. MoneySmart’s guide to buying stocks in Singapore is a useful starting point. But if there’s a chance you’ll need the cash at short notice, compare savings accounts in Singapore instead.
7. What if I already have US dollars?
Here’s where the math gets simpler.
Say you sold some US shares and now have US$20,000 sitting in your account. You’re not ready to reinvest yet, but expect to do so in 6 months. Converting it to SGD now means exchanging once, then potentially converting back to USD when you’re ready to invest.
A 6-month USD fixed deposit lets you keep the money in USD while earning interest.
At 3.40% p.a.:
US$20,000 × 3.40% × 6/12 = US$340
The key point isn’t just the US$340 interest. Your money starts and ends in USD, so you don’t need to convert to SGD just to park it.
The same logic applies if you already have a future USD expense, such as university fees, an overseas move or a business payment. Keeping the money in USD can reduce the need to worry about USD/SGD movements for that particular pot of money.
Planning to reinvest? Check out MoneySmart’s guides to investing in US stocks from Singapore and choosing an investment brokerage.
8. When might keeping my money in SGD make more sense?
Now flip the situation around. Say your S$30,000 is your renovation fund, and your contractor wants to be paid in SGD in 6 months. Your money is already in SGD, so converting it into USD means taking on currency risk purely for the higher interest rate.
An SGD fixed deposit keeps things much simpler:
- Your money starts in SGD.
- Your interest is earned in SGD.
- Your maturity proceeds come back in SGD.
- Your future bill is also in SGD.
There’s no USD/SGD movement to worry about. There’s also a deposit-insurance difference: eligible SGD deposits are insured up to S$100,000 per depositor per Deposit Insurance Scheme member, while foreign-currency deposits aren’t covered.
So if you already know you’ll eventually spend the money in SGD, keeping it in SGD can make the calculation much more straightforward.
Prefer to keep the cash accessible? Compare the latest high-interest savings accounts or explore other alternatives to T-bills before locking your money away.
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9. What should I check before opening a USD fixed deposit?
Made it this far reading our piece and still am keen? Now the advertised interest rate becomes useful, although it shouldn’t be the only number you compare.
Before moving your money, check:
- Interest rate: How much will you actually earn over your chosen tenure?
- Minimum placement: How much USD do you need to qualify for the rate?
- Tenure: Will the fixed deposit mature before you need the money?
- Early withdrawal: What happens to your interest if you need the cash sooner?
- Exchange rate: How much USD will your SGD actually buy?
- Maturity instructions: Where will your principal and interest go afterwards?
- Conversion back to SGD: Will you need another currency exchange at the end?
Banks can have different minimum placements, tenures and early withdrawal conditions. A slightly higher rate may not help much if you need to place more money than planned or lock it away for longer than you’re comfortable with.
MoneySmart’s fixed deposit comparison lets you compare products by deposit amount and tenure, while its fixed deposit rates guide gives you a broader look at what banks are offering.
10. Is 2026 or 2027 a good time to open a USD fixed deposit?
If you already have USD sitting in your account, why wait until 2027? Interest rates can move in either direction, and waiting could simply mean leaving your cash earning little while you wait for a rate that may or may not materialise.
Heading into 2027, you should keep an eye on the US Federal Reserve’s scheduled policy meetings and rate projections, which are released quarterly. Changes in US interest rates can eventually feed through to USD fixed deposit rates, although banks may adjust their rates at different times.
If you already know you won’t need your USD for the next 6 to 12 months, it’s worth comparing available fixed deposit rates now rather than trying to time the market.
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