how much cash is allowed to be paid in banks?

[stripes11]

habþve some amounts from gifts for children . how to pay cash into accpunt?

You can pay in as much cash as you like into your own bank. Unless it is £10,000+ in which case they will have money laundering questions and you will have to prove that it has come from a legitimate source.

Some banks don't like you paying in a load of coins though, so you would have to check that.