Student loans in your DTI: each loan type has its own rule

Does my income-⁠driven payment count the same with every loan type?

• FHA, VA, conventional and USDA loans each have their own rule for counting a student loan payment in your DTI.
• The low payment on your income-driven plan may not be the figure a lender puts in the math.
• On loans sold to Fannie Mae, the housing payment in your DTI includes HOA dues and special assessments as well as the loan, taxes and insurance.
• When your tax returns show less than you earn, the student loan eats a bigger share of your ratio.
• Find out which student loan payment each lender will use before you compare rates.

An income-driven plan sets your monthly student loan payment from your income and household size. For some borrowers that payment is small. A small payment helps your DTI only if the lender agrees to count it as it is.

I'm not going to quote each program's exact rule here. Those rules get updated, and a lender can add its own on top. What I'd do is ask every lender, in writing if possible, what figure it will plug in for your student loan.

What goes into a debt-⁠to-⁠income ratio?

Your DTI compares your monthly debts, including the new housing payment and the student loan payment a lender counts, with your monthly income. The lender adds up the debts, divides by your income before taxes, and gets a percentage.

Each program caps how high that percentage can go. Every dollar the lender counts for your student loan is a dollar that can't go toward the mortgage. That's why the counting rule changes how much you can borrow.

The housing side holds more than the loan itself. A conventional loan is one no government agency backs, and Fannie Mae buys many of them. Under Fannie Mae's Selling Guide, the housing payment in your DTI includes these parts:

That list applies only to loans sold to Fannie Mae. FHA, VA and USDA set their own rules. For HOA dues, Fannie Mae's guide counts dues that cover common-area utilities, not your unit's own utilities.

What this changes for you: a home with HOA dues leaves less room in your ratio for the student loan. If you're looking at condos, add the dues before you guess what you can afford.

Do student loans hurt more when you're self-⁠employed?

Yes, when your tax returns show less than you earn, a student loan payment takes up a bigger share of your DTI. A lender that reads business bank statements instead may see different income.

Write-offs lower your taxes. They also lower the income a lender sees on your returns. The student loan payment stays the same, so it looks heavier against the smaller number.

I'm a broker, so we shop one file across a network of wholesale lenders instead of living by one bank's rules. We also close bank-statement loans that retail banks turn away. Those loans can measure income from your deposits. You can read how bank-statement loans work for self-employed buyers.

Bank-statement lenders have their own student loan rules too. Different lenders want different deals, so ask each one which payment goes into its math.

Questions about write-offs or how you file belong with your CPA.

How I know this

I've done this work for 21 years at Rate Rebel (NMLS #282828), shopping one file across a network of wholesale lenders, and I've watched lenders read the same file differently. The housing payment details come from Fannie Mae's Selling Guide. My free calculators show an estimated payment with no credit pull.

Which loan type should you apply with first?

The loan type to try first is the one whose student loan rule leaves the most room in your DTI for your plan. Learn which payment each lender counts before you compare rates.

Once you know that, the rate comes next. The annual percentage rate (APR) is the yearly cost of the loan, with points and fees folded in. The example below uses points data from the Consumer Financial Protection Bureau (CFPB).

Example: a $400,000 30-year fixed loan at 6.09% (6.161% APR) with 20% down ($100,000) on a $500,000 home has 360 monthly payments of $2,421.40 in principal and interest. The APR assumes 0.75 discount points ($3,000, the median paid by 2023 home buyers who paid points, according to the CFPB) and no other lender fees. Taxes and insurance are not included, so the actual payment will be higher. The rate is the market average for January 22, 2026 from Freddie Mac Primary Mortgage Market Survey; yours depends on your credit, loan and property.

That example covers principal and interest only. Taxes, insurance and any HOA dues make the real payment higher, and all of it lands in your DTI next to the student loan.

My rule: if you're on an income-driven plan, the program that fits you is the one that counts the lowest student loan payment you can document, as long as the rest of your file fits that program. If your returns show less than you earn, compare a bank-statement lender too, because it changes the income side of the same ratio. Ask each lender which student loan payment it uses, then compare rates. You can run your numbers on the calculator on this page and see what the payment actually looks like.

The calculator gives an estimate, not an approval. Nothing here is a commitment to lend, and I lend only in California.

Questions buyers ask