Taking out student loans feels like a leap of faith. You are signing up for payments that will not start for years, based on a career you have not begun yet. But here is the good news: there is a straightforward way to figure out how much borrowing actually makes sense. By matching your expected salary to a few simple rules, you can take on debt you will be able to pay back without putting the rest of your life on hold. This article walks you through the math, shares real earnings data by major, and gives your family a clear framework for making smart borrowing decisions for the 2025-26 school year.
The Salary-to-Debt Rule You Need to Know
Financial aid experts keep coming back to one guideline: your total student loan debt at graduation should not exceed your expected first-year annual salary. This is sometimes called the 1:1 rule.
Why does it work? If you borrow $45,000 and your starting salary is $45,000 or more, you can typically pay off those loans within ten years on a standard repayment plan without spending more than about 10% of your gross income on monthly payments. According to Federal Student Aid, the standard repayment plan stretches payments over ten years with fixed monthly amounts, and keeping payments at or below 10% of income is widely considered manageable.
Some advisors use a stricter version: borrow no more than 70-80% of your expected starting salary. That gives you breathing room for lower-than-expected earnings, job search delays, or life expenses like rent in a new city.
Here is what this looks like in practice:
- Expected starting salary of $55,000 -- borrow no more than $38,500 to $55,000 total
- Expected starting salary of $40,000 -- borrow no more than $28,000 to $40,000 total
- Expected starting salary of $75,000 -- borrow no more than $52,500 to $75,000 total
If you find yourself needing to borrow more than your expected salary, it is time to seriously reconsider your plan. That might mean choosing a less expensive school, living at home, working part-time during school, or looking harder for scholarships and grants.
What Do Graduates Actually Earn by Major?
Not all degrees lead to the same paycheck. Your choice of major has a huge impact on how much borrowing makes sense. The National Association of Colleges and Employers (NACE) tracks starting salaries by field, and the Bureau of Labor Statistics (BLS) publishes detailed occupation data. Here is a snapshot of average starting salaries for recent bachelor's degree graduates:
High-Earning Majors
- Computer Science: $80,000 to $90,000
- Engineering (all types): $73,000 to $85,000
- Nursing (BSN): $65,000 to $70,000
- Finance and Accounting: $60,000 to $68,000
- Information Technology: $65,000 to $75,000
For these fields, the federal loan limit of $27,000 in subsidized and unsubsidized loans for dependent undergraduates over four years (per Federal Student Aid) falls well within the 1:1 rule. Borrowing the full federal amount still leaves plenty of room.
Mid-Range Majors
- Business Administration: $55,000 to $62,000
- Communications: $42,000 to $50,000
- Biology (non-medical career path): $40,000 to $48,000
- Criminal Justice: $42,000 to $47,000
- Political Science: $44,000 to $52,000
At this level, the federal loan limit is still reasonable, but adding private loans could push you past the comfort zone. Be careful about out-of-state tuition or expensive private schools if your major falls in this range.
Lower-Earning Majors
- Education: $38,000 to $42,000
- Social Work: $36,000 to $42,000
- Fine Arts: $34,000 to $40,000
- Psychology (bachelor's only): $36,000 to $42,000
- Liberal Arts / General Studies: $35,000 to $40,000
These are important, rewarding careers. But the math demands extra attention. A student graduating with $60,000 in debt and a $38,000 salary is going to feel squeezed for a long time. If you are drawn to one of these fields, minimizing borrowing is not just smart -- it is essential.
How to Calculate Your Personal Borrowing Limit
Here is a step-by-step way to figure out what makes sense for your situation:
Step 1: Research your expected salary. Use the BLS Occupational Outlook Handbook to find median salaries for the careers you are considering. Look at entry-level pay, not mid-career numbers.
Step 2: Apply the 1:1 rule. Your total borrowing across all four years should stay at or below that entry-level salary figure. If you want to be conservative, aim for 70-80% of it.
Step 3: Subtract grants and scholarships. According to Sallie Mae's "How America Pays for College" 2025 report, scholarships and grants covered an average of 32% of college costs in the most recent academic year. Factor in every dollar of free money first.
Step 4: Factor in family contributions and savings. What can your family contribute from income or savings each year? Even $3,000 to $5,000 a year adds up to $12,000 to $20,000 over four years.
Step 5: Calculate the gap. Whatever is left after grants, scholarships, family contributions, and your own savings and work income is the amount you would need to borrow. Compare it to your limit from Step 2.
Step 6: Run the monthly payment. Use the Federal Student Aid loan simulator to see what your monthly payment would be on a standard 10-year plan. If that number is more than 10% of your expected monthly gross income, you are borrowing too much.
Federal Loan Limits: Your Built-In Safety Net
One thing working in your favor: federal student loan limits are designed to keep most borrowers in a reasonable range. For the 2025-26 academic year, Federal Student Aid sets these annual limits for dependent undergraduate students:
- Freshman year: $5,500 ($3,500 subsidized)
- Sophomore year: $6,500 ($4,500 subsidized)
- Junior and Senior years: $7,500 each ($5,500 subsidized)
- Aggregate limit: $31,000 ($23,000 subsidized)
That $31,000 total is below the starting salary for nearly every major listed above. In other words, if you stick to federal loans only, you are almost always within a safe borrowing range. The trouble starts when families turn to Parent PLUS loans or private loans to cover the rest of the bill at expensive schools.
According to College Board's Trends in Student Aid, the average bachelor's degree recipient from the class of 2023-24 who borrowed graduated with about $29,400 in federal student loan debt. That is a manageable number for most graduates -- but it does not include private loans, which push the true total higher for many families.
The Monthly Payment Reality Check
Abstract numbers are hard to feel. Let us make them real. Here is what different debt levels look like as monthly payments on a standard 10-year repayment plan at a 6.53% interest rate (the current rate for Direct Unsubsidized Loans for the 2024-25 year):
- $27,000 borrowed: about $307 per month
- $31,000 borrowed: about $352 per month
- $50,000 borrowed: about $569 per month
- $75,000 borrowed: about $853 per month
- $100,000 borrowed: about $1,137 per month
Now compare those to starting salaries. A teacher earning $40,000 a year takes home roughly $2,800 per month after taxes. A $352 monthly payment is 12.6% of that take-home pay -- tight, but workable. Jump to $569 per month and that is 20% of take-home pay, which means real sacrifices in housing, food, and savings.
A software engineer earning $85,000 takes home roughly $5,200 per month. Even a $569 monthly payment is only about 11% of take-home -- much more comfortable.
This is why the same dollar amount of debt can be perfectly fine for one graduate and crushing for another. Your major and career path matter enormously.
Income-Driven Repayment: A Safety Valve, Not a Strategy
You may have heard about income-driven repayment (IDR) plans like the SAVE plan that cap payments at a percentage of your discretionary income. These plans are valuable as a safety net. If you hit a rough patch -- job loss, medical bills, a slow start to your career -- IDR keeps your payments affordable.
But do not borrow more than you should just because IDR exists. Here is why:
- IDR plans extend your repayment period to 20 or 25 years, meaning you pay far more in interest over time.
- Forgiveness after 20-25 years may be taxable depending on future tax law.
- Counting on a government program staying exactly the same for two decades is risky. Policy changes happen.
Think of IDR as a backup plan, not your primary strategy. Your primary strategy should be borrowing within the 1:1 rule.
Roadblocks to Watch
Falling in love with a school you cannot afford. This is the most common challenge families face. A dream school with a $60,000 annual price tag and a $15,000 merit scholarship still costs $180,000 over four years. If your expected starting salary is $50,000, the math does not work -- no matter how beautiful the campus is.
Ignoring the difference between sticker price and net price. The sticker price is what the school advertises. The net price is what you actually pay after grants and scholarships. Always look at the net price. Use each school's net price calculator (required by federal law) to get a realistic estimate before you commit.
Assuming your salary will grow fast enough to cover big payments. Yes, salaries usually go up over time. But your loan payments start six months after graduation, and the first few years out of school are expensive in other ways too: rent deposits, work clothes, car payments, maybe moving costs. Do not count on year-five earnings to handle year-one bills.
Mixing up gross pay and take-home pay. When you see a starting salary of $50,000, remember that taxes, health insurance, and retirement contributions will take a significant cut. Your actual take-home might be $35,000 to $38,000. Always run your affordability math on take-home pay, not gross.
Borrowing for living expenses beyond the basics. Federal loans can cover room and board, but that does not mean you should use them for a luxury apartment or eating out every night. Keep your cost of living as low as you reasonably can while in school, and your future self will thank you.
Not revisiting the plan each year. Your financial situation, your major, and your career goals can all change. Reassess your borrowing plan at the start of each academic year. If you switched from engineering to education, your borrowing limit just dropped, and you need to adjust.
The Bottom Line
The right amount to borrow comes down to one clear question: can you pay it back on your expected salary without it taking over your life? The 1:1 rule gives you a solid starting point. Federal loan limits offer a reasonable guardrail. And knowing what graduates in your field actually earn turns a vague worry into a concrete plan.
Every dollar you do not borrow is a dollar you will not owe with interest later. So look for scholarships, apply for grants, consider community college for your first two years, work part-time, and choose a school where the price matches what your degree is likely to be worth.
The best time to think about repayment is before you borrow, not after. If you want help comparing schools based on what they will actually cost your family and how that fits with your expected earnings, CollegeLens can help you build a personalized plan. It pulls together financial aid data, cost estimates, and outcomes so you can make this decision with real numbers instead of guesswork.
-- Sravani at CollegeLens