they vest over a period of time, not usually all at once. my company does it evenly over 4 years with a 1 year cliff. other companies can have it skewed towards the latter 4 years. employees do get refreshers as well. so if it vests equally over a certain amount of years, totally should count that portion towards yearly income. In your analogy, it's like counting how much you owe in mortgage payments every year towards yearly expenses.