Methodology
How we rate student loan affordability
Updated September 24, 2026
An affordability rating answers one question: how much of a month's pay would go to the loan payment? We divide the estimated monthly payment, federal and private together, by gross monthly income, and put the result in one of four bands. Under 10% is Comfortable. 10% to under 15% is Manageable. 15% to under 20% is Stretch. 20% or more is Heavy.
The same four bands are used everywhere a rating appears on CollegeLens, so a rating on one calculator means exactly what it means on another.
The scale
| Rating | Payment as a share of gross monthly income | What it means |
|---|---|---|
| Comfortable | Under 10% | This payment leaves room for rent, savings and the costs you cannot predict. |
| Manageable | 10% to under 15% | This payment usually fits an early-career budget, with less room to save. |
| Stretch | 15% to under 20% | This payment takes a real bite out of a starting salary. Borrowing less would ease it. |
| Heavy | 20% or more | A fifth or more of a starting salary would go to loans. Cutting the amount borrowed, or a longer payoff, would lower the pressure. |
Bands are inclusive at the bottom. A payment that works out to exactly 10% of gross monthly income is Manageable, not Comfortable. Exactly 20% is Heavy.
Each rating carries its label as text, not colour alone, so it reads the same whether or not you can tell the colours apart.
What goes into the payment
- The total monthly payment, federal and private parts added together. A gap filled with private loans counts the same as federal borrowing.
- The payment on a standard 10-year plan, unless the page says otherwise. An income-driven plan such as RAP can lower the early payments, and we show that separately rather than folding it into the rating.
- Interest that builds up while you are in school, where the page is estimating a program you have not started yet.
What goes into the income
Gross annual income divided by 12. Gross means before tax and before deductions. We use gross rather than take-home because take-home varies with the state you live in, your filing status and your benefits, and we do not ask for any of those.
Where the income is an estimate rather than a number you entered, the page says where it came from: usually the Bureau of Labor Statistics median wage for the occupation the program leads to. You can replace it with your own figure, and the rating updates.
With no income to compare against, we show "Need income data" rather than a rating. We never guess a salary to fill the gap.
What this rating is not
- It is not a lending decision, and it is not advice. A lender's own underwriting uses different numbers and will reach its own answer.
- It is not a budget. Rent, childcare and the cost of living where you land all move what a given percentage actually feels like.
- It is not the Worth-It Score. That score weighs a school's total debt against earnings after graduation. This rating weighs one monthly payment against one month of income.
- A Heavy rating does not mean a program is a mistake. It means the payment would take a fifth or more of a starting salary, which is worth knowing before you sign.
Why these thresholds
There is no single official ceiling for student loan payments. The bands here sit deliberately below the debt-to-income limits a lender would use, because a lender is asking whether you will repay and we are asking whether the rest of your life still fits around the payment.
An earlier version of this scale used three bands and called anything under 20% manageable. A payment at 19% of gross pay is not manageable for most people starting out, so the scale was rebuilt with four bands and a tighter top. Some estimates now rate one tier worse than they did before. That is the point of the change.
See it applied
The CollegeLens Loan Limits and Affordability Calculator rates a graduate or professional program against this scale, and the Borrowing Calculator rates a borrowing plan you build yourself.