MONTPELIER, Vt. — As more students balk at the debt loads they face after graduation, some colleges are offering an alternative: We’ll pay your tuition if you offer us a percentage of your future salary.

Norwich University said Tuesday that it will become the latest school to offer this type of contract, known as an income-share agreement. Norwich’s program is starting small, mainly with students who do not have access to other types of loans or those who are taking