Cost Calculator AI
Education & SchoolDebt Burden

College Debt Calculator

Track cumulative borrowing across all 4 undergraduate years and evaluate your debt-to-income (DTI) ratio against expected post-graduation salary.

Year-by-Year Borrowing Projection

Calculation Results

College Debt Affordability Formula

Debt-to-Income (DTI) = (Total Cumulative Student Borrowing / Expected Starting Salary) × 100
  • Financial rule of thumb: Total student debt at graduation should not exceed your expected first-year annual salary.
  • Calculates monthly student loan burden as a percentage of gross post-graduation income (target: <8%–10%).
  • Classifies financial risk: Healthy (≤8%), Moderate (9%–12%), Burdensome (13%–18%), or Excessive (>18%).
  • Aggregates year-by-year borrowing (freshman through senior year) into a single repayment schedule.

Step-by-Step Worked Example

Scenario: Student borrowing $7,500/year for 4 years ($30,000 total) expecting a $55,000 starting salary in marketing.

Calculation Steps:

  1. Total Cumulative Debt: $7,500 × 4 = $30,000 principal.
  2. Debt-to-Income Ratio: $30,000 / $55,000 = 54.5% (Safe: well under 100%).
  3. Standard 10-Year Monthly Payment: $325.53 per month ($3,906/year).
  4. Payment Percentage of Gross Salary: $325.53 / ($55,000 / 12) = 7.1% (Healthy: under 8%).
Result: Total debt is $30,000 with a monthly payment of $325.53. At a $55,000 salary, your debt-to-income ratio is 54.5% and monthly payments absorb 7.1% of income (Healthy).

How to Use This Calculator

  1. 1Enter planned or existing borrowing for each academic year.
  2. 2Provide your realistic expected entry-level annual starting salary.
  3. 3Check whether your monthly payment stays under 8% to 10% of monthly earnings.

Assumptions & Limitations

  • Assumes a standard 10-year fixed amortization schedule for post-grad repayment.
  • Starting salary represents gross annual pre-tax compensation.

Frequently Asked Questions

What is the safe rule of thumb for student loan debt?

Never borrow more total student debt for your degree than you expect to earn in your first year working after graduation. If your starting salary is $50,000, your total debt should remain under $50,000.

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