Fee to charge for mid year accounts?

Hi Guys,

I have a few contractors set up as limited companies that have taken out large sums mid way during year as dividend. After a meeting with a hmrc inspector, i was advised that mid year accounts need to be produced to prove that there was sufficient profits in the company for them to be able to pay a dividend and then a resolution / dividend voucher must be issued. otherwise they can try to levy NI if caught out.

I have done this work for these clients but unsure of what sort of fee to charge...

Any suggestions?

Thanks guys.