the limit is for full year..the 250000 is just basic exemption limit amt..when u deposit more than 2.5L it means that u have income chrgbl to tax ..so the IT dept verifies it with or return and if any deviation is found notice will be sent to u.later u have to show reasons for not showing it as income...if it was found that u r guilty then after long process 200%penalty is levied......mostly they don't take that seriously about a common man like u and I...so no need of much fear.