Your first deposit: how to start with 100 USDT and how much interest a day
In one line: For a first deposit, starting in flexible savings is steadiest. At an 8% APY, 100 USDT earns about 0.022 U a day and roughly 8 U a year — don't scoff at small, the point of this first deposit is to get the flow down at a tiny cost, not to make money. Below we walk you through where to put it first, how interest is computed, why a small amount shouldn't bother with cross-chain transfers, and why you must not be lured by high-APY pools.
Where the first deposit goes: flexible, nothing else yet
The most common beginner dilemma is "what should my first deposit buy". The answer is clear: put it in flexible savings, and leave everything else alone for now. Binance's Simple Earn flexible and OKX's Simple Earn flexible are built for exactly this — deposit and withdraw any time, a minimum low enough to start with a few U, and the simplest risk structure.
Why not go straight to something else? Because the goal of a first deposit isn't to make money, it's to get familiar with the flow. Fixed terms lock your funds, which is a bad trade before you understand things; Dual Investment, Launchpool and those high-APY pools have complex mechanics and high risk, and need to be understood before you go near them. The beauty of flexible is that you can run through the whole "deposit → watch it accrue → withdraw" flow with zero pressure, and withdraw any time, with almost no cost to making a mistake. Run this through on flexible first, and only then do you know what you're actually doing.
The math: 100 USDT a day and a year
What everyone cares about most: put 100 USDT in, and how much do you actually get a day? We'll just compute it. The rough formula for flexible interest is:
daily interest ≈ principal × APY ÷ 365
Assume the current flexible APY is 8% (a somewhat optimistic example; the real APY changes every day):
| Basis | Formula | Approximate amount |
|---|---|---|
| Daily interest | 100 × 8% ÷ 365 | ≈ 0.022 U |
| Monthly interest | ≈ 0.022 × 30 | ≈ 0.66 U |
| Annual interest | 100 × 8% | ≈ 8 U |
If the APY is only 4%, just halve all the figures above: about 0.011 U a day and roughly 4 U a year. These are all rough estimates off a floating APY — go by what the product page shows at the moment you deposit.
Seeing "two cents a day" might be disappointing, but set your mindset straight: this first deposit was never about making money. It's a hands-on lesson with very low tuition — you pay an almost negligible price for a real understanding of the whole flow. That trade is worth it.
📋 Editorial field test · 2026-06-06
To write this piece, we actually ran it with a small amount. That morning we subscribed 100 USDT sitting idle in the account into flexible savings, with the product page showing an APY floating around 8% at the time. Subscribing completed instantly, but the page noted "interest starts accruing the next day", so there was no interest that day. Checking again the next morning, the account had a few hundredths of a U more in interest — matching the roughly 0.02 U a day we'd estimated with "100 × APY ÷ 365". We then hit redeem, and flexible credited fast. The biggest takeaway from the whole run wasn't those two cents — it was confirming with our own hands that "there's a one-day lag between subscribing and accruing, and flexible can be withdrawn any time". The APY floats, and we didn't treat the number we saw that day as a long-term promise.
Step by step: four steps to deposit this 100 U
Using Binance Simple Earn flexible as the example (OKX Simple Earn is almost the same flow), four steps do it:
- Have USDT in your account first. Using a balance you already hold on the exchange is the easiest (why not transfer specially — see the next section).
- Find the earn entry. On Binance look for Simple Earn / "Earn"; on OKX go to "Earn" → Simple Earn, and choose the USDT flexible product. You can check Binance's official Earn page to understand the product categories.
- Enter the amount, confirm the subscription. Type 100 (or a smaller amount you want to try), make sure it's flexible and deposit-and-withdraw-any-time, and confirm. Subscribing usually completes instantly.
- Wait for the next day to see interest, and try redeeming once. Most flexible products start accruing the next day; check the small bit of interest added to your account the following day, then redeem once on purpose to feel how fast flexible credits.
For more detailed step-by-step screenshots, see Binance Simple Earn walkthrough and OKX Earn walkthrough. Beginners just need to remember: pick USDT, pick flexible, put in a small amount, run through it once.
Ready to run your first deposit? The USDT flexible products in Binance Simple Earn and OKX Simple Earn both start from a few U and deposit and withdraw any time, ideal for beginners to practice. Use invite code BNB2628 at Binance or OK2628 at OKX for a fee discount — Go to Binance / Go to OKX.
Two pitfalls at small sizes: fees & the high-APY lure
Pitfall one: don't bother with cross-chain transfers for 100 U — fees will take over. Subscribing idle USDT into flexible inside an exchange and redeeming it usually carries no fee, so relax. What does eat small returns is on-chain transfer / withdrawal fees — if you specially withdraw coins from another wallet and shuttle them cross-chain just for this 100 U, that network fee could offset several months' or a whole year's interest. So for a small first deposit, deposit directly from a balance you already have on the exchange and don't bother. How scary the fee share gets at small sizes is essentially "fixed cost divided by a small principal", which is exactly why we suggest using your existing on-platform balance.
Pitfall two: do not be lured by high-APY pools. Just starting out, it's easy to be tempted the moment you see a pool touting "100% APY" or "X% a day": same 100 U, and that side could earn tens or hundreds of U a year — who'd settle for these 8 U? But treat that impulse as a danger signal. An absurdly high APY almost always corresponds to risk you can't see — you can't say where the yield comes from, and the principal can hit zero in an instant. The habit a first deposit should build most is "only earn yield you can actually explain": the few points on flexible, you can say come from the platform's lending spread, and the risk is relatively controllable. On why high yield deserves the most caution, we wrote a whole piece, Why the highest-APY pools deserve the most caution — strongly recommended before your first deposit.
Next step: estimate it yourself with the calculator
This piece uses 8% and 4% as examples, but when you actually deposit, it's best to compute your own APY, term and likely return yourself. We built a compound yield calculator: enter your principal, current APY and how long you plan to keep it, and it estimates the rough interest and compounding effect. Running a few numbers yourself beats memorizing someone else's conclusion — you'll see directly that small-amount interest really isn't much, but stacking APY, time and compounding still adds up to something meaningful over the long run.
Once your first deposit has gone through and you have a feel for it, look at Flexible vs fixed vs staking to decide where a bigger next deposit should go. One step at a time, no rush.
Risk warning
Crypto earn is not principal-protected. The 0.022 U / 8 U figures in this piece are all rough estimates off an 8% floating APY; the real APY changes every day, so go by the product page at the moment you deposit. Flexible savings is relatively steady, but in extreme conditions platform risk and stablecoin de-peg risk can still cost you part or all of your principal. This piece is for learning reference and is not investment advice. Use only money you can afford to lose, and start with a small amount you can bear.
FAQ
How much interest does 100 USDT in flexible savings earn a day?
Estimating off the current floating APY, if the APY is 8%, 100 USDT earns roughly 100 × 8% ÷ 365 ≈ 0.022 U a day, and about 8 U over a year. If the APY is only 4%, that's about 0.011 U a day and roughly 4 U a year. These are all rough estimates off a floating APY — the real rate changes every day, so go by what the product page shows at the moment you deposit. The amount looking tiny is normal — the point of a first deposit is to get the flow down, not to make much.
Which product should a first deposit go into?
Flexible savings (Binance Simple Earn flexible, OKX Simple Earn flexible). The reason: flexible deposits and withdraws any time, has a low minimum and the simplest risk structure, and is ideal for getting used to the whole flow of subscribing, accruing interest and redeeming. Don't start with fixed terms (which lock funds), and definitely don't touch Dual Investment, Launchpool or high-APY pools — those you should understand the mechanics of before going near. Run a small amount you can afford to lose through flexible first, then talk once you have a feel for it.
100 USDT is so small — is it worth putting into earn?
Yes, but set your expectations straight. 100 USDT earns only a few U of interest a year, which is trivial from a money-making angle. But the real value of a first deposit is 'a hands-on lesson with very low tuition': you'll walk through depositing, watching interest accrue and redeeming with your own hands, and learn whether there's a lag between subscribing and accruing, whether flexible can be withdrawn any time, and how interest is credited. That experience is worth far more than those few U of interest. Treat it as paying a tiny price to get familiar with the flow, not as a way to make money.
Will fees on a small deposit eat up the interest?
Subscribing idle USDT into flexible savings inside an exchange and redeeming it usually carries no fee in itself, so this step doesn't really erode interest. What does easily eat small returns is 'on-chain transfer / withdrawal fees' — if you specially withdraw coins from another wallet or shuttle them cross-chain just for this 100 U, that network fee could offset several months' or a whole year's interest. So for a small first deposit, deposit directly from a balance you already have on the exchange and don't bother with cross-chain transfers.
Why not chase higher yield and find a pool with a bigger APY?
Because an absurdly high APY almost always corresponds to risk you can't see. The habit a first deposit should build most is 'yield you can actually explain': the few points of APY in flexible savings, you can say where they come from (the platform's lending spread), and the risk is relatively controllable. Pools touting tens, hundreds, even thousands of percent APY — you can't say where the yield comes from, and the principal can hit zero in an instant. Chasing high yield with your first 100 U teaches the wrong habit, and it's not worth it.
Start with interest the size of a cup of milk tea
Don't wait until you've "researched it all" to act. Put 100 U into flexible first and watch it grow a few hundredths of a U of interest day by day — your understanding of crypto earn will run deeper than reading ten articles. We use Binance and OKX ourselves: use invite code BNB2628 at Binance or OK2628 at OKX for a fee discount.