If you leave your job to do a Master's, not only do you pay your tuition and living expenses, but you are also not earning what you would if you didn't go to school. In this scenario, the one-year option is better. Furthermore, good quality education is always a serious investment when it comes to paying your dues. In this sense, a 1 year courses after graduation will be much lighter on your wallet or will leave you with a minor debt post-graduation, which you will be able to pay back much faster.