A new study found that in almost all 50 states, you need to make over $90,000 a year to truly be happy and stress-free. The state where you can truly be happy on the cheapest budget is Mississippi at $89,000 a year. It's followed by Oklahoma at $91,000, Arkansas also $91,000, New Mexico, $93,000 and Kansas, $93,000. The state where happiness costs the most is Hawaii. You'd need to make $201,000 a year. The rest of the five most expensive states for happiness are California, $145,000, New York, $144,000, Oregon, $141,000 and Massachusetts, $137,000. Researchers also looked at how much you need to make for your "emotional well-being." That means you're not completely happy, but not constantly stressed out. That number ranges from $51,000 to $115,000 a year, depending on the state.