You’d think the easy bit would be working out how much I’ve been paid. But no. That would be overlooking the length of time it can take me to submit an invoice, the (even more variable) time it can take an invoice to get paid, the way multiple invoices can be combined together, holiday pay nonsense, the fact that not all my work is invoiced (some is monthly payroll), the way expenses sometimes get rolled into pay, and that some documentation is sent by my employers to completely random addresses.
Result: I have payslips, contracts, invoices and bank statements. The correlation between these is neither obvious nor complete. Normally, I have about four contracts a year, so it’s really not too hard; last year, I had more like a dozen. Yowch.
Wish me luck. I’m going in.