I've got an interview this week for a job where they didn't specify a salary. I can't find anything online suggesting what they might pay. I want the job but am not willing to take a pay cut for it. How can/should I approach this in interview? Especially a problem if they don't explicitly ask what my salary expectations are?
I'd tell them what you've written, i.e. "I want the job, but I'm not willing to take a pay cut for it" but specify what your expectations are.
A good negotiation tactic can be to mention your base salary plus any benefits packages which are worth x as a whole number. If they query this (often this can add £5-10k on in some organisations), you can justify it by explaining the benefits and explaining how you'd be seeing a net loss if you weren't suitable compensated.
Example... you're on £50k with a 10% employer pension contribution, private medical and misc benefits. Asking for £60k is justified but will likely mean you're breaking even in an organisation with a worse pension scheme, so I'd be asking for more than £60k if they wanted me to leave. If they want you to relocate then I'd add more and explain that too.
They can only say no, so providing you aren't making numbers up and can give a good reason for why you feel you're worth x then you're fine.
The hard ball tactic (if you know they want you) is to say "I won't leave for less than X" but that can backfire