Tommys,I'm assuming this is the first time you've been approached in this manner. This is an excellent time to learn some skills that will stand you in good stead for the rest of your career.First of all decide what you want in the next 5-10 years. If you want to work in technology for another few years before getting a job as a mid-level manager in the IT department of a bank or utilities then I suspect Tata is a perfectly acceptable brand to do this with. What you do at Tata will be more important than their brand.If you decide that you want to stay in consulting then the acn brand will be of far more value than TCS. Progression to Manager will open doors at places like EY, Deloitte, etc.If you decide to go to Tata then you get a bunch of money - simple. When you get your next big increase is rather open to debate.If you decide not to go to Tata then you need to maximise the opportunity. Go to your accenture manager and explain that you have been approached. Explain that you really went to the interview just for experience, not really expecting to be impressed. However, you were really pleasantly surprised by how professional Tata are and now they've come back with a fantastic offer. Show him the letter/e-mail. Explain that you didn't have any intention of leaving as you love accenture, but you're really had your eyes opened to the opportunities at other firms. They really made you feel special, offering you a really interesting role. Stress that while it’s not all about money, the increase in salary would help a lot right now as you’re trying to buy a house/trying to pay off some debts/some other important financial activity. Explain you are in a quandry - you know the accenture culture is all about excelling and standing out from the crowd, and here you find yourself doing just that, but in the eyes of a competitor. Ask your manager what he would do if one EY or PWC offered him a huge raise to move?Do not simpy make it about the money - make it about what the money will allow you to do. The first sounds greedy and transactional. The second sounds like you can’t afford to turn down such a great raise.At best you will get a raise at acn.Mid-table result is that you get no added cash, but you reposition yourself in the eyes of the career managers and cenhance your path to managerWorse outcome is that they express genuine surprise that TATA would pay you so highly - in which case you might want to rethink taking the offer - it woud mean ACN dont rate you.