Student Loans, Marriage, Home and Career

Student loans rarely stay in their own box. Getting married can raise an income-driven payment overnight. A mortgage lender may count your loan very differently from what you actually pay. A job offer can be worth more, or less, once loan benefits and forgiveness are counted. This chapter takes the big decisions one at a time, marriage, buying a home, children, career and where you live, and shows how each one interacts with your loans.

Marriage and how you file your taxes

Income-driven plans look at the adjusted gross income on your tax return. For a married borrower, how the couple files decides whose income counts.

• Married filing jointly. IBR and the Repayment Assistance Plan use the couple's combined income. If both spouses have federal loans, the payment is calculated on the joint income and shared between them.
• Married filing separately. Under IBR and RAP, only the borrower's own income counts. For a borrower whose spouse earns well, this can cut the payment sharply.

Filing separately has a tax cost, and it is often more than the difference in brackets. A separate return loses or limits several tax breaks, including the student loan interest deduction (up to $2,500 of interest a year for those who qualify), education credits, and in most cases the earned income credit and deductible IRA contributions. The bracket effect alone can be estimated: for most incomes in 2026, a separate return uses the same brackets and standard deduction as a single filer.

A couple earning $150,000 together owes $15,340 filing jointly. Filing separately, with the borrower at $60,000 and the spouse at $90,000, they would owe $5,020 and $10,970, a little more in total, before counting any lost credits. Against that, an IBR payment based on $60,000 instead of $150,000 would fall by roughly a tenth of the spouse's income each year. When the loan saving clearly exceeds the extra tax, filing separately can pay; when the incomes are close or the loans are small, it often does not.

Run both versions every year, because the answer changes as incomes change. In community property states such as California and Texas, income on separate returns is divided under state rules, which complicates the comparison; a tax preparer who knows student loans is worth the fee there.

Buying a home

Mortgage lenders judge affordability partly by your debt-to-income ratio: monthly debt payments, including the new mortgage, as a share of gross monthly income. Student loans count, and the way they count varies.

• Some loan programs use the payment on your credit report or servicer statement, including a low income-driven payment, if it is documented.
• Others substitute a percentage of the balance, such as 0.5% or 1% a month, when the reported payment is zero or cannot be verified, which can count a loan as much larger than what you actually pay.

Ask each lender which rule it uses before you apply, and bring a current statement showing your payment.

A $320,000 mortgage at 6.5% costs $2,023 a month before taxes and insurance. A $50,000 student loan on the standard plan adds $568 on top, and a lender counts both. Moving to an income-driven plan can lower the student loan payment a lender sees, but it also means carrying the loan longer, so weigh the mortgage you want against the total cost of the loan. The home affordability calculator shows how your existing debts change the price you can afford.

Children and family size

A larger household lowers income-driven payments in two different ways. IBR protects income up to 150% of the poverty guideline, and the guideline rises by $5,680 for each additional person in the 48 contiguous states. RAP takes $50 a month off the payment for each dependent. Report a new child at your next recertification, or sooner if you want the lower payment right away.

Career choices

Loans can steer career choices, sometimes in the wrong direction. A few things change the arithmetic of a job offer:

• Public service. A government or qualifying nonprofit job brings Public Service Loan Forgiveness into play, which can be worth more than a higher private-sector salary for someone with large loans. Chapter 4 explains how to value it.
• Employer repayment help. Employers can pay up to $5,250 a year toward an employee's student loans tax-free under an educational assistance program; the 2025 law made this permanent.
• Matching contributions for loan payments. Since 2024, employers may count your student loan payments as if they were retirement contributions and make a matching contribution to your 401(k) or 403(b), so you do not lose the match while repaying. Ask whether your plan offers it.
• A big raise. On an income-driven plan the payment will rise at the next recertification. Rerun the comparison in chapter 3; a high enough income can make paying faster cheaper than waiting for forgiveness.

Where you live

Moving to a cheaper area can free more cash for repayment than almost any other single change, if your income holds up. Compare the full picture: rent, taxes, commuting, and whether your field pays similarly there. The geo-arbitrage calculator compares cost of living between places, and the state income tax comparison shows how much state tax changes. State tax also matters for anyone expecting income-driven forgiveness, since states treat forgiven debt differently.

Saving for retirement while you repay

Waiting until the loans are gone to start retirement saving gives up the years when compounding does the most. At a minimum, contribute enough to collect any employer match while you repay, and treat the rest as a balance between a guaranteed return on the loan and the expected return of investing, which chapter 5 covers.