Hi HW,
I've been self employed as a consultant for 6 years. I've never had a seperate bank account so here is how I work it:
Clients pay on invoice seperated into fees and expenses (if they are paying). So for instance if they agree to pay me train fare to London then I attach my ticket.
I have a spreadsheet that has clients down one side and then anything invoiced on monthly columns. V. simple, so predicted in green, confrimed in black and then highlighted when paid into bank. It keeps monthly and yearly totals. New s/sheet each financial year. Only shows fees though and I insert a comment to match to invoice code.
Another worksheet keeps tally of hours/days per job/client.
All my invoices I keep electronically but back them up regularly.
Expenses - I have an envelope on the wall and stuff any receipts into it - tickets/lunches/ink cartridges etc. I don't have many expenses so only sort them out at the year end but you could do monthly if so inclined!
End of year - DP does my tax return but I could do it myself. He enters expenses into a s/sheet and checks my diary where I record milage. Any expenses paid by clients do not count of course. Then we calcualte a % of mobile/broadband/phone etc. and add to the total.
You also have to add in any interest earned on savings but not a prob for us right now!!
BTW do check out getting Prof Indemnity insurance - I should have it and in fact will have to get some for a new contract...any suggestions MNers?
Also be careful that you don't only end up with one client as the IR will not be happy. I also have to declare that I pay my own tax and NI on my invoices so that clients auditors are happy.
There you go - see I am incredibly lazy and disorganised but even I can do it.