When Does Interest Calculation Start for OKX Margin Account?
OKX margin account interest is calculated and deducted once every full hour, based on the 0:00 UTC+8 time zone. The billing and deduction take place at every full hour (e.g., 1:00, 2:00... 23:00).
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Below are the complete interest rules and step-by-step verification instructions.
Step 1: Confirm the exact time for interest calculation and deduction
According to OKX official rules, interest calculation and deduction for margin loans happen simultaneously:
Calculation frequency: Recorded once every full hour.
Deduction frequency: Also deducted once every full hour, synchronized with the calculation.
Reference time: Based on 0:00 UTC+8, and repeated at every subsequent full hour (1:00, 2:00, 3:00... 23:00).
Completion standard: You clearly understand that your interest will be calculated and deducted at every full hour (Beijing time).
Step 2: Understand the meaning of "interest calculation duration"
The calculation and deduction are not instantaneous; the system requires a certain amount of time to process the liability status at the exact full hour.
Ordinary margin interest calculation takes approximately 10 minutes to complete the statistics and computation.
For VIP loans, the calculation duration is approximately 5 minutes.
Key rule: New liabilities generated during the calculation period will also be included in the current cycle. The calculation and deduction process does not affect account balance or position balance; it only updates the liability records.
Completion standard: Understand that within a few minutes after the full hour, liability interest is still being tallied, and you need to wait a few minutes to see the complete deduction result.
Step 3: Use practical examples to determine if interest will be deducted
Use the official example to test whether your understanding is correct:
Scenario: A user borrows at 22:55, and then:
Case A: The user repays the loan at 22:57.
Result: The calculation period lasts 10 minutes (22:55 to 23:05), but the liability has been cleared before the calculation starts. This borrowing will not incur any interest.
Case B: The user borrows at 22:57 and does not repay before 23:00.
Result: At exactly 23:00, the system detects the existing liability, includes it in the interest calculation range, and deducts interest at the hourly rate. Even if the liability existed for only 3 minutes, interest will be calculated for a full hour.
Completion standard: You can accurately determine whether a borrowing will incur interest at the full hour. The core criterion is "whether the liability exists at the exact full hour."
Step 4: Confirm whether you have an interest-free quota
Under certain scenarios, liabilities benefit from an interest-free quota, and only the portion exceeding that quota is subject to interest.
Applicable scenario: In cross-currency margin mode, liabilities arising from unrealized PnL of contract positions enjoy an interest-free quota.
Reference for interest-free quotas of major currencies (Source: OKX Help Center, 2026-07-19):
| Currency | Interest-free quota (amount) |
|---|---|
| USDT | 20,000 |
| BTC | 1 |
| ETH | 5 |
| USDC | 5,000 |
Note: Liabilities from spot margin trading and from realized PnL of contracts do not have any interest-free quota.
Completion standard: Determine whether your liability falls within the interest-free quota. If it does, that part of the liability is not charged interest; the excess portion is still charged at the normal rate.
Common causes of misunderstanding
Mistakenly believing "interest is only charged after holding for a full hour"
Many users think borrowing is charged by the minute, but in fact OKX charges interest based on a snapshot at every full hour. Even if you borrow just 1 minute before the hour, as long as the system detects a liability at the full hour, a full hour's interest will be deducted. If you do not want to pay that hour's interest, you must complete the repayment before the full hour arrives.
Risk warning
Interest is calculated hourly, not daily: The daily rate is divided by 24 and deducted every hour. Even if the borrowing period is less than an hour, it will be charged as a full hour.
VIP loans accrue interest even if unused: Interest for VIP loans is calculated based on the "borrowed" locked quota, not the quota actually used for opening positions. Once the quota is locked, interest starts accruing regardless of whether it is used.
Insufficient interest triggers forced repayment: If there is not enough available asset in the account to pay the interest, the system will trigger a forced repayment and unlock the borrowing quota. If part of the liability occupies the VIP loan quota, after the quota is released, that part of the liability will automatically convert to a margin loan under Savings.
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How to confirm that interest deduction is complete
Go to [Assets] → [Margin Account] or [Unified Account], and check the "Liabilities" and "Interest" fields for the corresponding currency:
5-10 minutes after a full hour (e.g., 14:00), refresh the page.
Check whether the "Liabilities" amount has increased (interest accumulates into the liability and is deducted together), or whether there is a separate interest deduction record.
If the liability amount has not increased and there is no interest record, it means there is currently no interest-bearing liability, or the liability is within the interest-free quota.
