Hitting cancel won't undo a buy that has already filled. Cancel only reaches the part of an order still waiting on the book; anything that filled is now a line in your Trade History. We went through the official FAQ and found nothing saying a filled spot trade can be reversed on request. What you can do is place the opposite trade yourself and swap the coin back.
There are two ways to do that. You can sell it back to USDT with a spot order, which costs a second trading fee: 0.1% for a regular user, or 0.075% with BNB fee deduction switched on (the rates in the official worked example, checked October 2026; the fee schedule shows the live figure). Or you can reverse it with Convert, which the Convert page says charges no fees, and where the amount in the quote is what lands in your account. Look at both in the same minute and take whichever gives you more back. Whatever is too small to sell at the end can be turned into BNB.
1. Check the order first: the unfilled part can still be cancelled
Start with one question: did this order actually fill, or is it just sitting there?
A limit order set at a price the market hasn't reached stays open until it does. Cancel it and the USDT goes back to your available balance; nothing traded, so there's no trading fee to speak of. A market order is different. It usually fills the moment you tap it.
The awkward case is a partial fill: some of the order went through, the rest is still open. Cancelling removes the open remainder only. The filled part stays filled and needs the fix in section 3. While you're in Trade History, note the fee on that fill. The official FAQ says "For the final fees charged, check the Trade History page," and that's the number to work from when you tally what the mistake cost.
2. A real wrong buy, or something else?
People say "I bought the wrong coin" about several different things, and they don't all need the same fix:
- Wrong pair. You meant coin A and got coin B with a similar ticker, or paid with the wrong quote currency. That's a genuine wrong buy; go to section 3.
- Too much. Right coin, extra zero. Sell back only the excess.
- Market instead of limit. Right coin, possibly a worse price than you planned. This one is usually best left alone. Selling back means another fee and maybe another bite of spread, and if it's the coin you wanted anyway, keeping it tends to be cheaper.
- It dropped right after you bought. That isn't a wrong buy. Whether to sell is a fresh investment decision. The FAQ in how to buy crypto step by step has a word on exactly this.
- The coin carries a risk warning or a delisting notice. Read what happens to delisted crypto first; the dates matter more than the sell decision.
- You actually picked the wrong network or address when withdrawing. That's an on-chain transfer problem, not a trade. See TRC20 vs ERC20 vs BEP20.
3. Sell back on spot or reverse with Convert
Pulled together from two official pages and the exchange's public trading-rule data, checked October 2026. If a screen or rule has changed since, go by what the order page shows you.
| Sell back on spot | Reverse with Convert | |
|---|---|---|
| Fee | 0.1% for a regular user, 0.075% with BNB deduction (from the worked example in Binance's BNB fee guide) | "There are no fees for using Binance Convert." |
| What you receive | Price times quantity, minus the fee. The fee is usually charged in the coin you receive, then converted into BNB if deduction is on | "The quoted amount of assets shown is the actual amount of assets you will receive" |
| Smallest trade | 5 USDT on BTC/USDT and ETH/USDT, 1 USDT on DOGE/USDT; other pairs differ | Depends on the coin and pair, and you can preview it before entering an amount |
| Settlement | On fill | Usually right after you confirm; in some cases up to a few minutes |
| Needs | An account that can trade | Completed identity verification (Convert FAQ) |
No fee doesn't automatically mean more money back. Convert hands you a quote; a spot sell takes whatever the book pays at that moment, and the two needn't match. So compare what you'd actually receive: the amount in the Convert preview against what the spot book would pay for your coins, minus 0.1%. Where each route hides its cost is worked through in Convert vs spot order, so it isn't repeated here.
A hypothetical, fees only. You bought 100 USDT of the wrong coin and sell it straight back on spot. The buy costs about 0.1 USDT at 0.1%, the sell roughly another 0.1 USDT, so around 0.2 USDT in total. With BNB deduction on for both, 0.075% each brings it to about 0.15 USDT; see the guide on paying fees with BNB for switching it on. Price movement between the two trades, and any spread a market order ate, come on top, and they can be larger, especially on small-cap coins.
Meant to buy a different coin altogether? Selling to USDT and then buying the right one is two spot trades and two fees. If Convert offers a direct swap between the two coins, it's one step; same rule, check the preview.
Start with Convert's preview, since it puts the received amount right in front of you. If the gap is small, take it and skip watching the book. A bigger amount with a visible gap is worth a spot order.
4. The bit that won't sell
Spot sells have a minimum order value: 5 USDT on BTC/USDT and ETH/USDT, 1 USDT on DOGE/USDT. Quantities move in fixed steps too, 0.00001 BTC, 0.0001 ETH, 1 DOGE, and a sell has to be a whole number of those steps. These come from the exchange's public rules, queried October 2026; every pair has its own values and the order form tells you when you're below them.
That's why selling the bulk often leaves a sliver behind. It's under the minimum value, or not a whole step, and the order simply won't submit.
Those leftovers can be turned into BNB. The developer docs call it Dust Transfer and describe it as "Convert dust assets to BNB," with a fee deducted. What counts as dust, how often you can convert and how the fee is set, we couldn't find stated as fixed numbers on a public official page. The small-balance conversion list in your app's assets or wallet section is the reference; the exact menu name may differ by app version. It's a small amount, so there's no rush.
5. Making it less likely next time
Read the pair name at the top of the order form out loud before you tap. The coin before the slash is what you're buying; the one after it is what you're paying with. Tickers a letter or two apart are where eyes slip.
Use a limit order when you're not in a hurry. Until the price is reached it just sits there, and if you've typed something wrong you can still cancel, which is the one case in section 1 that's fully reversible.
With a coin you've never bought, place a small order first, confirm it's the right one and that it arrived, then do the rest. If the spot screen is still unfamiliar, the Binance beginner guide walks from sign-up to a first buy, and how Binance fees are calculated breaks the rates down.
6. Questions people ask
Can support reverse a trade that already filled?
Usually not; the official FAQ we went through describes no way to reverse a filled trade on request. Support is worth contacting when the record doesn't match: the pair, price or amount in Trade History differs from what the order page showed you. Before you ask, find that fill in Trade History and screenshot the time, pair, price, amount and fee to send along. If the record matches what you did, the price keeps moving while you wait for a reply, so selling or converting back yourself is the faster fix.
Do I pay the fee twice if I sell it back?
Yes. The buy and the sell are two trades, and each is charged. The regular-user spot rate in the official example is 0.1% (checked October 2026; the fee schedule shows the live rate), so a round trip costs about 0.2% of the amount. Reversing with Convert adds no trading fee; the cost is inside the quote.
Should I hold the wrong coin and wait for it to recover?
That's a separate decision from the slip itself. Ask it this way: if you were holding the same amount in USDT right now, would you buy this coin? If not, swap back. If you would, it wasn't really a wrong buy; the timing just feels bad.