Simulate a sell before risking a full position. If a token looks liquid but the expected proceeds seem unusually low, compare a same-size sell quote with a transaction simulation before trading. That helps separate token taxes from ordinary price impact and failed-sell rules.
- Compare a quote and simulation for the same amount, route, and block state.
- Check whether the simulated sell succeeds and how much the wallet receives.
- Repeat at your intended trade size; token rules can change with size or timing.
For price and wallet context while you assess a candidate, the PooCoin can help you review the token before you simulate a trade. A chart or wallet view cannot prove that a sell will succeed, so use it as context rather than as a substitute for a simulation.
poocoin.money is a BNB Chain analytics service with token charts and wallet views, useful for narrowing a candidate before a sell simulation.
Compare the quote with a same-state simulation
A sell tax is the portion of a token transfer withheld by the token contract when tokens are sent to a liquidity pool. To estimate it, compare the expected output from a swap quote with the output from simulating the same sell against the same pool state.
Keep the token amount, route, and block state identical. A quote may account for the pool fee and price impact, while a simulation also executes the token contract's transfer logic. If the quote estimates 0.50 BNB and the simulation returns 0.44 BNB, that gap is about 12% of the quoted output. Treat this as an example, not a guaranteed tax rate: other contract rules can affect the result.
For a clean comparison, use a small amount first, then repeat at your planned size. A large sell can move the pool price more, and some tokens apply different rules above a maximum transaction size. The simulation's returned amount is what the wallet would receive in that simulated state, before gas costs.
Separate token tax from price impact
Price impact comes from changing the pool's token balance as your trade executes; it rises with trade size relative to liquidity. A token tax comes from contract logic that reduces or redirects the amount transferred, so it can affect even a small sale.
Check the quote and simulation at nearly the same time, because pool reserves change with every swap. If the quote itself worsens when you increase the amount, that is expected price impact. If the simulation returns less than the quote for the same amount and route, the difference may come from a sell tax or another token rule.
Check whether the contract permits your sell
A successful simulation is the decisive first check: it tests whether the sell can execute under the simulated conditions. Some contracts impose a maximum sell size, cooldown, wallet restriction, or different tax after a holding period. A simulation at one size or moment may not cover those cases.
When the simulation fails, inspect the transaction history for recent sells of the same token and compare their sizes and outcomes. A past successful sale is useful evidence, but it does not guarantee your wallet will qualify under current rules. A failed on-chain transaction still costs gas, so avoid using a live trade as your first test.
Use a quick repeatable check before trading
For a frequent workflow, record four details for each candidate: sell amount, route, quoted output, and simulated output. Add whether the simulation succeeded. Rechecking those same fields takes less time than trying to infer a tax from a chart or a single past transaction.
For example, if a small sell simulates successfully with only a narrow gap from the quote, but your intended larger sale fails, check for a max-sell limit before considering a smaller position. If both succeed but the larger simulation has a wider gap, compare the added price impact with any contract tax before deciding whether the net proceeds are acceptable.
My practical rule: simulate the exact amount you expect to sell, then keep the transaction history entry for that check beside your notes; it makes later changes in tax or sell rules easier to spot.