Margin Account 101 | 07 How much interest do you actually pay when you trade on margin?
Margin interest is generally calculated on the following factors:
amount actually borrowed × annual rate × number of days actually used
Tiger accrues margin interest daily and charges it monthly; the day-count basis may differ by currency. The current annual margin rate for AUD, USD, HKD and CNH is 7.99%, but rates may change — the figures shown in your account and on the official pages prevail.
Important: This material is provided for general educational and informational purposes only and does not constitute financial product advice, investment advice, or a recommendation. Margin lending, short selling, and other leveraged trading strategies involve significant risks and may not be suitable for all investors. Losses may exceed your initial investment. Before investing, consider whether the product is appropriate for your objectives, financial situation and needs, and read the relevant PDS and risk disclosures.
Two further details are worth spelling out:
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No compounding: interest that has accrued but is not yet settled does not itself accrue interest.
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Billed monthly: interest accrues daily and normally appears in your statement around the fourth US trading day of the following month; your statement prevails.
Check the latest margin rates: https://www.itiger.com/au/commissions/fees/financing_interest_rates
An example
Suppose a user actually borrows:
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USD 10,000
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annual rate: 7.99%
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period used: 10 days
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USD accrues on a 360-day basis
A rough calculation:
USD 10,000 × 7.99% × 10 ÷ 360
≈ USD 22.19
Which means that repaying the financing early reduces the number of days on which interest accrues.
What creates a margin loan?
Note that all of the following may create a margin loan:
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buying US stocks without sufficient USD (the system automatically creates a margin loan secured against account assets);
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using margin to increase position size;
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a cash balance in any currency turning negative;
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withdrawing more than "cash withdrawable" — the excess is a margin drawdown, expected to begin accruing interest after the daily settlement;
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holding cash in one currency but withdrawing another — withdrawals do not auto-convert, so financing arises in the withdrawn currency;
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in a cash account, trading or withdrawing after a currency conversion but before settlement completes may also incur interest (currency conversion takes 2 business days to settle).
How do you trade on your margin limit?
How do you check how much margin you have used?
How to view your accrued margin interest?
"I already closed my positions — why is interest still accruing?"
This is one of the more common questions our client service team receives. There are a few typical reasons:
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your margin position relates to all account activity — placing further orders or participating in an IPO after submitting a withdrawal request may also trigger interest;
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a debit balance remaining in another currency will also accrue interest;
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proceeds from closing positions or converting currency must settle (usually at least two trading days, excluding holidays) before they count towards "cash withdrawable"; withdrawing before then creates financing.
To withdraw everything without creating financing, you will generally need to wait for settlement, then submit a separate withdrawal for each currency based on the cash withdrawable shown on that currency's page. If a currency is in debit, that debit must be cleared via currency conversion before the withdrawal request.
Two things to check if you want to pay less interest
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Whether "end-of-day currency conversion repayment" is switched on: this feature is enabled when the margin account is opened, and before interest accrues each day it converts settled available funds in other currencies into the borrowed currency and repays outstanding borrowings automatically, reducing accrued interest. Check its status under Portfolio → Convert → Set up Auto Conversion (see Issue 3).
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The interest accrual cut-off: repayment generally needs to complete before interest accrues at 2:00 p.m. AEST / 3:00 p.m. AEDT the next day in order to reduce that period's interest.
Key takeaway
Interest is calculated on the margin balance actually outstanding and the time it is actually used. The more you borrow and the longer you hold it, the higher the financing cost.
Further reading (Help Centre)
Quiz: You borrow USD 10,000 at an annual margin rate of 7.99% for 10 days. Using a 360-day basis, approximately how much interest would you pay?
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A. USD 7.99
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B. USD 22.19
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C. USD 79.90
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D. USD 221.90
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Upgrade to Margin Account now and enjoy a limited-time offer: successfully open a margin account to receive 10 brokerage-free trades + 2,000 Tiger Coins*. Tiger Coins can be used to redeem vouchers, merchandise, and more.
*Min. brokerage waived. Third-party trading fees and other fees still apply. The card is valid for 60 days. See T&Cs . Trading in derivatives or leveraged financial products involves significant risks, including the risk of losses exceeding initial investment, and may not be suitable for every investor.
Upgrading to a margin account provides access to a broader range of tools and features. Whether to use these features should be considered carefully based on your investment objectives, financial situation, trading experience, and risk tolerance. For more details on margin account features, currency-specific interest rates, and fee schedules, please visit the Margin Account page and Pricing page, Help Centre and our Risk Disclosure.
This material is provided for general information purposes only and does not constitute financial product advice, investment advice or a recommendation. This information does not take into account your objectives, financial situation or needs. Any securities mentioned are provided for illustrative purposes only and do not constitute a recommendation, solicitation or endorsement. All investment products carry risk and are not suitable for all investors. Margin lending and short selling carry a high level of risk and may not be suitable for all investors. If the value of your collateral falls or your position moves against you, Tiger Brokers (AU) may be required to sell your holdings or close your positions without prior notice to meet margin requirements or limit potential losses. Rates, margin requirements, product features and eligibility criteria are subject to change, and the information available on the Tiger platform and official website at the relevant time will prevail. Before trading, please read the relevant PDS and T&Cs, ensure you fully understand the risks involved, and seek independent professional advice where appropriate.
Disclaimer: Investing carries risk. This is not financial advice. The above content should not be regarded as an offer, recommendation, or solicitation on acquiring or disposing of any financial products, any associated discussions, comments, or posts by author or other users should not be considered as such either. It is solely for general information purpose only, which does not consider your own investment objectives, financial situations or needs. TTM assumes no responsibility or warranty for the accuracy and completeness of the information, investors should do their own research and may seek professional advice before investing.

1) 融资就是(借钱买股票)
- 例如你有 US$5,000,但买了US$15,000 股票。多出来的 US$10,000 = 借来的钱。
- 这 US$10,000 就会产生融资利息。
2)利息怎么算?
借得越多 + 借得越久 = 利息越多。
给个例子:
US$10,000 × 7.99% × 100 ÷ 360
≈ US$222
- 所以答案是 B. USD 221.9
3)想提醒的
- 如果你是投资新手,我个人不建议为了长期投资而使用7.99%左右的融资。
- 原因非常简单:假设股票一年只赚 5%,但你借的钱要付 7.99%利息。
- 股票赚5% − 融资成本7.99% = 反而亏约3%。而且股票下跌时,利息不会因为股票跌了就停止。
- 保险点,谨慎点
自己的钱慢慢买股票 → 风险较低。
- 借钱买股票 → 股票涨时放大赚钱,股票跌时也放大亏钱。
- 对新手来说,我更倾向:不用融资,长期慢慢买。
Calculation:
$10,000 × 7.99% × (10 ÷ 360) = $22.19
So the approximate margin interest for 10 days is USD 22.19. 📊
Using a 360-day basis: USD 10,000 × 7.99% × (10/360) ≈ USD 22.19. The 7.99% is an annual rate, so for 10 days we only pay the corresponding fraction of the annual interest.
What matters here is not simply the 7.99% annual rate, but how much money is actually borrowed and how long it remains outstanding. Margin interest is generally accrued daily, so closing a position or repaying the borrowing earlier can directly reduce the financing cost.
The bigger lesson is that margin is not “free cash.” Even if you only use it temporarily, every day counts. A negative USD balance, an early withdrawal, or unsettled sale proceeds can quietly create financing costs.
For active traders, the key is therefore simple: borrow only what you need, repay as soon as practical, and always check the actual debit balance rather than assuming your account is fully settled.
@Tiger_AU [龇牙]
计算是:
10,000 × 7.99% × 10 ÷ 360 ≈ 22.19 美元
我觉得这题最值得提醒的,不只是会套公式,而是要明白 融资成本取决于“实际借了多少 + 借了多久”。有额度不代表在付利息,但只要账户真的形成了负余额,哪怕仓位后来已经卖掉,只要借款还没因为结算、换汇或还款而归零,利息都可能继续累计。
另外,多币种账户更容易忽略这一点:你可能觉得“钱还在账户里”,但如果某个币种仍是负数,实际上融资还没有结束。
一句话:融资利息真正怕的不是借一天,而是负余额拖太久;金额和时间,才是成本的核心。