tds should be deposited upto the 7th of the following month & if it is deposited late then interest will be charged on tds amt. & rate of interest is 1% p.m. or part of month
eg: tds is deducted on 18th aug 2010 then the last date for deposit is 7th sep. 2010 & depositing tds amt. after this date interest will be charged @ 1% p.m. or part of month
There is not penalty provision on non payment. you will have to pay only interest liability @ 1% p.m. and if your TDS Return is late due to this, there is a provision of penalty by 100/- per day u/s 272A(2).
Apart from the interest, we are talking about, penalty under section 221 may be levied for failure to deduct / deposit TDS in time & the amount of penalty may be upto the sum of TDS involved.