Finance
HIBOR Falls 6 Days:
Is a 4.2% USD Time Deposit Worth It?
Gary Chung (FinKit Editor-in-Chief) · Published: October 8, 2026
On 7 October, the 1-month Hong Kong Interbank Offered Rate (HIBOR) - the benchmark tied to H-plan mortgages - fell for a sixth straight session to 2.83905%, its lowest since 27 August. Over the same days, HKD time-deposit promotions did not follow it down: Dah Sing offered up to 3.3% for three months, Shanghai Commercial Bank 3.4% for 12 months, and a BOCHK promotion was quoted at 3.5% for 12 months. Meanwhile, 12-month US dollar deposits were widely available at 4.2% to 4.3%.
Interbank rates falling, promotional rates holding, dollar rates sitting a full point higher - put those three together and the obvious question is whether a USD deposit simply wins. The answer needs three separate calculations: the gap between board rates and promotional rates, the gap between HKD and USD, and the currency risk that the extra yield is paid to compensate for.
Three numbers, three directions
Start with the facts of the day. Each figure below carries its own period and publication date, so that market rates, daily fixings and bank promotions are not mixed into one comparison.
| Item | Figure | Period / source |
|---|---|---|
| 1-month HIBOR | 2.83905% (sixth day of falls) | Hong Kong Association of Banks, published 7 October 2026 |
| 12-month HIBOR | 4.00071% | Hong Kong Association of Banks, published 7 October 2026 |
| 1-month USD CME Term SOFR | 3.91411% | 7 October 2026; reports said the HKD-USD spread widened for a fifth day, the widest since 23 September |
| Highest HKD deposit promo (12 months) | 3.4% - 3.5% | Bank announcements, 2 to 6 October 2026 |
| Highest USD deposit promo (12 months) | 4.2% - 4.3% | Press round-up of bank offers, 6 October 2026 |
| USD/HKD | 7.8472 | Early hours of 8 October 2026 |
Note: interbank rates are published daily; deposit rates are promotional and carry conditions. Always confirm with the bank before placing.
The shortest tenors fell fastest
HIBOR moved lower across the curve on 7 October, but not evenly. The declines were concentrated at the front end: overnight fell 30.89 basis points, one week 24.46 and two weeks 24.29. The six-month rate was unchanged, and the 12-month rate slipped just 1.35 basis points to stay above 4%.
| Tenor | Rate | Change | Period / source |
|---|---|---|---|
| Overnight | 2.04333% | -30.89 bp | 7 October 2026 |
| 1 week | 2.38149% | -24.46 bp | 7 October 2026 |
| 1 month | 2.83905% | -6.1 bp, sixth day of falls | 7 October 2026 |
| 3 months | 3.27018% | -2.13 bp | 7 October 2026 |
| 6 months | 3.52964% | Unchanged | 7 October 2026 |
| 12 months | 4.00071% | -1.35 bp | 7 October 2026 |
Short rates falling while the long end holds means the curve has steepened: the gap between the 1-month and 12-month tenors has widened to roughly 1.16 points. That has two consequences for depositors. First, money parked short will reprice lower when it rolls over. Second, banks that want to lock in long-term funding still have to pay up at the long end - which is why 12-month promotional rates have not followed short rates down.
Board rates versus promo rates
The most common mistake with deposit rates is treating a bank's board rate and its promotional rate as the same number. At the same major bank, three-month standard new money may pay only 2.40%, while a time-limited promotion reaches 3.3%. Below are the standard board rates (excluding promotions):
| Bank | 3 months | 6 months | 12 months |
|---|---|---|---|
| HSBC | 2.40% | 2.20% | No board rate |
| BOCHK | 2.40% | 2.40% | Selected-client tier, unverified |
| Hang Seng | 2.40% | 2.40% | No board rate |
| Standard Chartered | 2.40% | 2.40% | 3.30% |
| BEA (new money, private banking tier) | 2.95% | 3.30% | 3.30% |
| ICBC (Asia) (98 / 188 / 388 days) | 3.20% | 3.30% | 3.40% |
| Citibank | 3.00% | 2.72% | 2.92% |
| DBS | 2.50% | 2.60% | 2.50% |
| Bank of Communications (digital channels) | 2.70% | 3.10% | 3.00% |
| CMB Wing Lung (new money, above HK$500k) | 1.95% | 3.05% | 3.05% |
Source: banks' official rate pages, verified via Hong Kong Economic Times bank pages on 8 October 2026. ICBC (Asia) figures use 98 / 188 / 388-day tenors. Some tiers require designated client status or minimum deposits. Rates change daily - confirm with the bank before placing.
Where promo rates come from
If interbank rates are falling, why are promotional rates holding up? Because promotions are not priced off HIBOR. They are bought with conditions: new-customer status, new money, specified tasks and specified channels. These are the main HKD offers announced in the first fortnight of October:
| Bank | Rate and tenor | Conditions | Announced |
|---|---|---|---|
| Dah Sing | Up to 3.3% for 3 months | New customers opening a YOU Banking integrated account, HK$100,000 to HK$800,000, via the mobile app; a further 0.2 points requires e-payroll registration, a multi-currency debit card and one FX trade | 7 October 2026 |
| Shanghai Commercial Bank | 3.4% for 12 months | New money or converted funds, opened at a branch | 6 October 2026 |
| CNCBI | Above 3% across 3, 4, 6 and 12 months | Deposit size and client tier as published by the bank | 6 October 2026 |
| BOCHK | 3.5% for 12 months | Designated funds and channels during the promotion period | 2 October 2026 |
| HSBC | 3.3% for 6 months, 2.95% for 3 months | Designated funds and channels during the promotion period | 2 October 2026 |
| PAObank | 12% for 1 month | New individual customers, first HK$100,000, open an account and place a 1-month HKD deposit; promotion runs to 31 October | 6 October 2026 |
Watch how a headline like 12% works: it applies to the first HK$100,000 for one month only. On HK$100,000, the actual interest is about HK$986 - a one-month outcome, not an annual return. The same logic applies to a 3.3% three-month deposit: the interest is 3.3% multiplied by three months, not by twelve.
USD deposits above 4%: how wide is the gap?
USD deposits generally pay more than HKD. A 6 October market round-up showed ICBC (Asia), CNCBI and OCBC offering 4.2% on 12-month USD deposits of US$100,000; among digital banks, PAObank quoted 4.3% and Ele Bank and livi 4.2%. At the short end, Fubon offered 4.1% on three-month US$100,000 deposits and Chong Hing 4.0% on US$10,000.
| Comparison | HKD | USD | Gap |
|---|---|---|---|
| Board rates (3 months, major banks) | 2.40% | 4.0% - 4.1% | About 1.6 - 1.7 points |
| Best promo (3 months) | 3.3% | 4.1% | About 0.8 points |
| Best promo (12 months) | 3.5% | 4.3% | About 0.8 points |
Gaps are the difference between the figures shown. Sources: bank announcements and press round-ups, 2 to 6 October 2026. Minimum deposits, channels and client tiers differ, so the same money cannot earn every rate in the table - each offer has to be checked on its own terms.
Two points stand out. First, the widest gap is board rate against board rate: a major bank pays 2.40% for three months in HKD while USD pays above 4%, a difference of more than 1.6 points. Second, once the HKD side also has a promotional rate, the gap narrows to roughly 0.8 points. Part of the impression that USD deposits win by a mile comes from comparing a USD promotional rate with an HKD board rate.
0.8 points against a 1.29% band
A USD deposit pays interest in dollars, so converting in and out of HKD involves two layers of cost.
The first is the bid-offer spread. Banks quote a buying and a selling price for the US dollar, and a round trip eats into the extra yield. Spreads differ by bank, amount and channel, so the actual quoted rate should be confirmed rather than assumed to be zero.
The second is the exchange rate itself. The Hong Kong dollar operates within a linked exchange rate system, broadly between 7.75 and 7.85 to the US dollar. On the morning of 8 October it stood at 7.8472, near the weak side. The band is about 1.29% wide, measured against 7.75. In other words, an annual yield advantage of 0.8 points is earned inside a range 1.29% wide - if the HKD strengthens from the current level to 7.75, the conversion loss is about 1.24%, which is larger than a full year of extra interest.
This is not a forecast of where the exchange rate is going. It is a description of the risk structure: the peg makes currency risk in USD deposits far smaller than in other foreign currencies, but not zero - and part of the extra yield exists to compensate for it.
Lock short, or lock in the long rate?
Short-tenor interbank rates falling while the 12-month rate holds above 4% creates a clear trade-off.
A one or three-month deposit tracks the front end, so it may reprice lower when it rolls over - useful for money that may be needed at short notice. A 12-month deposit locks in today's relatively high long rate, but ties the money up: early withdrawal typically means no interest, and some banks charge a fee as well.
The practical approach is to layer the money. Cash needed immediately should not go into a time deposit at all; funds that may be used within three to six months suit shorter tenors; only money that will genuinely stay untouched for a year should be considered for a long lock. That is the same principle that governs where emergency cash is kept.
Three checks before you commit
1. Confirm which tier the rate belongs to
A single bank can run a board rate, a new-money rate, a designated-client rate and a task-based bonus at the same time. Promotions are usually advertised as "up to", meaning every condition must be met. Confirm which tier applies and what rate actually lands, rather than remembering only the headline number.
2. Work out the currency round-trip cost
For a USD deposit, ask the bank for its buying and selling prices on the day and calculate the round trip with real figures before comparing against an HKD rate. The larger the amount, the bigger the absolute impact - and the more worth negotiating.
3. Check the tenor and the penalty
Minimum deposit, maturity date, early-withdrawal arrangements and auto-renewal all need to be confirmed. Deposit protection matters too: the Hong Kong Deposit Protection Scheme covers up to HK$800,000 per depositor per bank, and foreign-currency deposits are covered, though the protected amount is calculated in HKD.
Frequently asked
If HIBOR is falling, will deposit rates follow?
Board rates usually track interbank rates; promotional rates do not have to. Promotions are priced according to a bank's funding needs and customer mix, so short-term HIBOR can fall while promotional rates hold or even rise. Promotions also expire - after which rates generally revert towards the board level.
If USD deposit rates are higher, is it always the better choice?
Not always. Three things should be counted together: the FX bid-offer spread, the exchange-rate move over the deposit period, and the opportunity cost of locking the money up. A USD deposit suits someone who already holds dollars or has a known future dollar need. Converting purely to chase the yield gap may leave most or all of that gap consumed by costs.
Are headline rates like 12% or 6% real?
They are real, but very narrow in scope: typically capped at a set amount, limited to a specific tenor (often one month or seven days), restricted to new customers, and sometimes subject to a draw or tasks. What matters is the actual amount earned, not the annualised headline. A separate article breaks down how these conditions work.
How does HIBOR relate to mortgage payments?
The 1-month HIBOR is the benchmark for H-plan mortgages. When it falls, the effective rate on those mortgages usually follows; if it drops below the capped rate, payments are calculated on the actual HIBOR-based rate. So the same fixing moves both deposit returns and mortgage costs.
The bottom line
The three numbers from 7 October - six days of falling HIBOR, HKD promotional rates still holding high, and USD deposits above 4% - look contradictory but are prices from three different markets. Interbank rates are the market cost of funds; promotional rates are what a bank pays to buy specific conditions; and USD deposit rates include compensation for currency risk. Before comparing, work out which layer the number belongs to, then run the comparison again using the bank's actual exchange rate and a single sum of money. That is far more reliable than comparing which headline rate looks bigger.
Before you place a deposit, compare rates across banks and work out the interest at maturity
Related reading
Disclaimer: This article is for general information only and is not investment advice, an offer, or a recommendation of any bank or deposit product. Interbank rates come from the Hong Kong Association of Banks; deposit rates come from banks' official rate pages and media reports, and USD deposit rates are a market round-up. Rates, offer conditions and exchange rates change daily, and some offers carry limits, deadlines and eligibility conditions. Confirm the latest terms with the bank before opening any deposit. Deposits and currency conversion carry risk, past rates are not a guide to future levels, and you should assess your own circumstances and seek professional advice before acting. Written on 8 October 2026.