If so, do you use 3rd party software, and which one?
To date, I've used HMRCs web based PAYE and NIC calculators, and kept the equivalent of an old paper P11 for each employee on an excel spreadsheet. Now RTI is coming in, that obviously won't serve any more. (Including DH & me, we generally have around 7 people on the books at any one time.)
I've tried the free HMRC software and can't get along with it (and that's putting it politely), so I guess we'll have to cough up, but it'd be good to hear others' recommendations. Cheers!