If you have 10,000 USDT, the interest calculation is straightforward only when the full balance receives one constant APR. In real products, the rate can change, some offers use balance tiers, and the amount earning interest may change when you trade or redeem.
This guide turns the question into practical numbers and shows how MEXC Earn Plus calculates interest on a flexible balance.
At a constant simple APR, 10,000 USDT would generate approximately:
| APR | Per day | 30 days | Per year |
| 2% | 0.55 USDT | 16.44 USDT | 200 USDT |
| 3% | 0.82 USDT | 24.66 USDT | 300 USDT |
| 4% | 1.10 USDT | 32.88 USDT | 400 USDT |
| 5% | 1.37 USDT | 41.10 USDT | 500 USDT |
| 6% | 1.64 USDT | 49.32 USDT | 600 USDT |
| 8% | 2.19 USDT | 65.75 USDT | 800 USDT |
These are simple estimates. Actual Earn Plus interest depends on the live variable APR and the hourly balance. MEXC explains the current accrual rules in its Earn Plus FAQ.
For a simple annual estimate:
10,000 × APR = annualized USDT interest
For a 30-day estimate:
10,000 × APR × 30 ÷ 365
For example, at 5% APR:
annualized: 500 USDT;
30 days: about 41.10 USDT;
one day: about 1.37 USDT.
This assumes the APR and principal do not change.
MEXC states that interest for the current flexible Earn Plus product starts from the hour after subscription, is calculated hourly and is distributed daily.
That means the most accurate conceptual formula is:
sum of each hourly eligible balance × applicable hourly rate
The platform performs the calculation automatically. Users mainly need to understand that subscriptions and redemptions can change the balance used for future accrual.
Suppose you begin the day with 10,000 USDT and redeem 2,000 USDT at hour H.
MEXC's FAQ says the interest-bearing balance adjusts from H+1. So the earlier hours still use the previous balance, while later hours use 8,000 USDT.
This is more precise than assuming you either earn on 10,000 USDT for the whole day or 8,000 USDT for the whole day.
Imagine a simplified 30-day period:
first 15 days: 5% APR;
next 15 days: 4% APR.
For 10,000 USDT, the simple estimate is:
first 15 days: about 20.55 USDT;
next 15 days: about 16.44 USDT;
total: about 36.99 USDT.
A variable APR therefore produces a realized return based on the sequence of rates, not the rate visible on the first day.
Suppose another product advertises 10% APR but only on the first 500 USDT, with 2% on the rest.
For 10,000 USDT:
500 × 10% = 50 USDT annualized;
9,500 × 2% = 190 USDT annualized;
total = 240 USDT;
effective APR = 2.4%.
The question “How much can 10,000 USDT earn?” therefore cannot be answered from the headline APR alone.
MEXC's current Earn Plus FAQ says the flexible product has no maximum subscription limit, which simplifies full-balance comparisons.
Compounding depends on whether distributed interest is added back to the earning principal. MEXC's product materials should be checked for the current Auto-Earn or reinvestment workflow on the specific product.
The mathematical effect of compounding is straightforward: reinvested rewards can themselves begin earning future rewards. But users should not assume that daily distribution automatically means daily compounding unless the product actually re-subscribes the interest.
USDT does not automatically pay interest to ordinary holders. Tether describes its reserve-backed token model through How Tether Works and publishes reserve information through Transparency.
MEXC says Earn Plus can deploy subscribed assets into products such as USDC or USDGO and distribute returns generated from those allocations. Circle publishes USDC reserve disclosures; Anchorage Digital publishes USDGO reserve attestations.
That is why the product rate is a feature of the earn strategy, not a native property of USDT.
It is large enough that balance tiers start to matter. A 500 USDT promotional cap covers only 5% of a 10,000 USDT position. A 1,000 USDT cap covers 10%.
At this size, you should calculate effective APR and expected monthly USDT income before choosing a product.
About 500 USDT per year on a simple annualized basis if the full balance remains eligible and the APR stays at 5%.
A simple 30-day estimate is about 41.10 USDT. A 1/12 annual estimate is about 41.67 USDT.
MEXC states that interest is calculated hourly and distributed daily.
The interest-bearing balance adjusts from the next accrual hour, according to MEXC's current FAQ.
No. Earn Plus APR is variable.

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