I need help with the work offer

Oslo has a much higher cost of living than the rest of the country.  If you annual bonus can take that annual salary into the million NOK+ range, you should be good.  Expect about 35% of that to be taken in taxes if you are single.  Less if you are the single bread winner for a family.

I would search on real estate around the area where they want you to work and find out how much leasing a place to live would cost.  You would not be able to take a home loan against a Norwegian bank until you have filed taxes for three years (we learned that one the hard way), so you might consider financing through your country of origin if you are looking to buy.

Many companies that bring in foreign workers also have housing arrangements, so you might want to talk to your human resources department.

Personally, I would be more inclined to want to commute a bit in order to keep the prices lower.  It would be a GREAT salary pretty much anywhere outside of the city.
Hope that helps.
Sarah

Hello! The sallary seems to be pretty good, but you have to be aware about the taxes, which are pretty high. As you were told before, Oslo is the most expensive city in Norway, even an ordinary tram ticket is insane comparing to Berlin or Amsterdam.
   My advice is to work in Oslo but to try to live somewhere outside the city.
   Good luck anyway!

Hey - it is a pretty good salary even for Norway. The average salary being around NOK 300K per year.

With such a salary the tax rate will be more like 45% than 35% as indicated on another message. All in all it depends of your life style and what would be your main cost here:
- cars are at least 100% more expensive than anywhere else in Europe (except Denmark)
- food is at least 35% more expensive but it varies a lot based on what you eat (e.g.; frozen pizzas are not so expensive)
- cinema, restaurants, clubs are way more expensive than anywhere in Europe
- booze is also 100% more expensive
- outdoor activities are cheaper
- air tickets are very cheap

so if you like to ski and eat frozen pizzas, Norway os for you, if you like fine food, big cars, and strong alcohol then you may feel that your salary is not big enough

Yes, that's right! Booze is my opinion is 500% more expensive than anywhere else! Cigarettes the same! Even British are shocked about the prices...I can give you some...Around 4,5 Euro 1 Carlsberg at supermarket and, pay attention! around 11 Euro one Kent package (20 cigarettes).
   Another shocking price for me: around 5 Euro a tram ticket in Oslo, valid for just 1 hour.
   So, be careful and good luck!