At a US based company I got 2 weeks until 5 years of service then I got 3 weeks. I started for a UK based company (but working in US) and now I get 4 weeks, 5 after 5 years, plus a 4 week sabbatical after 5 years. And I can buy a week for a week's salary or sell one for a week's salary. They used to let us sell a week for 5% of our salary, but not anymore after last year. 10 holidays at both companies, but the UK based employer doesn't provide floater days, we get Good Friday, Easter Monday, Christmas Eve and Boxing Day instead. All in all a much better deal now...