I've been offered a new role at a US led company which is expanding internationally and setting up a new team in the UK. It offers growth opportunities and interesting work. But its the same salary I'm on already and with fewer overall benefits. I haven't got a good feel.for the culture and expectations and the interview process has been really quick, rushed almost, so I am not sure how hard to negotiate on the package available. My current role has a car allownce, pension top up, private health cover, life assurance, travel insurance and dental insurance. The offer letter doesn't say anything other than the basic salary and a 3% employer pension which is the statutory minimum.
Would it be considered rude to go back to them and ask them to match my other benefits? I assumed a US company would offer everyone healthcare due to the US system but if its not in the offer letter presumably I can't rely on that. What is the cultural norm when negotiating with a US based HR team?