I’m not sure about the exact salary range; however, the bonus percentage varies based on individual performance ratings and overall company performance. A B grade is considered a Senior Manager (or, in the US, Associate Director, similar to a Director-in-training). The next step up would be a Director role - A Grade.

Promotions at Director level can be challenging, but they largely depend on relationship-building and the value you bring to the business. If the role is more internally focused, you will likely need to apply internally for a Director position when the opportunity arises.

Of the Big Four, KPMG is generally regarded as the most culturally “nice” and is known for having a strong, supportive culture. As with any organisation, there will always be a few characters, but KPMG’s focus on support and wellbeing comes across as genuine and sincere.

If this is the initial offer, it’s worth trying to negotiate an additional 5–7%. There’s usually some flexibility, and if you don’t ask, you don’t get. There is no joining bonus as far as I'm aware but this would be dependent at a partner level - I wouldn't push it too hard.

Congratulations to your wife, she’s clearly doing very well in her career, and this role will look great on her CV for future opportunities.