Every mortgage program counts your student debt as part of your debt-to-income ratio, but how student loan payments are calculated for a mortgage depends entirely on which program you apply for. Fannie Mae may count 1% of your balance as a monthly payment on a deferred loan. Freddie Mac and FHA use 0.5%. The VA divides 5% of the balance by 12, or excludes the payment altogether if your loans are deferred well past closing. USDA generally mirrors FHA but treats income-driven plans with extra caution. On a $60,000 balance, the amount counted against your ratio can range from $0 to $600 a month depending on the program alone.
Why the Formula Matters
Your debt-to-income ratio, or DTI, is the share of your gross monthly income going to recurring debt payments, including the proposed mortgage. Lenders add up your monthly obligations, divide by pre-tax income, and compare the result to the program’s ceiling. Fannie Mae’s automated underwriting can approve borrowers up to 50%.1Fannie Mae. Debt-to-Income Ratios Freddie Mac allows up to 45% on manually underwritten loans.2FDIC. Freddie Mac Home Possible Guide FHA generally caps at 43% without compensating factors. VA uses 41% as a guideline but flexes with strong residual income.
Student loans are often the largest non-housing debt a borrower carries, so the method a lender uses to translate that balance into a monthly number can be the difference between approval and denial, or between the house you wanted and the one you have to settle for.
Fannie Mae (Conventional)
Fannie Mae’s rules sit in Selling Guide section B3-6-05. If a monthly payment appears on your credit report, the lender uses that amount, including a $0 payment under an income-driven repayment plan.3Fannie Mae. B3-6-05, Monthly Debt Obligations That is a meaningful advantage for borrowers whose income qualifies them for a low or zero payment.
When loans are in deferment or forbearance and no payment is reported, the lender must either count 1% of the outstanding balance as the monthly payment, or use a fully amortizing payment based on documented loan terms.3Fannie Mae. B3-6-05, Monthly Debt Obligations On $80,000 in student debt, the 1% figure lands at $800 a month against your ratio even though you are not paying anything. Producing documentation of the actual repayment terms and pushing for a fully amortizing figure can sometimes lower that number, depending on your rate and remaining term.
Freddie Mac (Conventional)
Freddie Mac is more forgiving on zero-dollar payments. When the credit report shows $0, the lender uses 0.5% of the outstanding balance instead of 1%. On that same $80,000 balance, the counted amount drops from $800 to $400, a swing that can add $50,000 or more to your qualifying loan amount. When the credit report shows a payment above zero, Freddie Mac uses the reported figure, same as Fannie Mae.2FDIC. Freddie Mac Home Possible Guide
Because Fannie and Freddie are the two main conventional buyers, one practical question at the loan officer’s desk is which agency your lender plans to sell to. That single detail decides which percentage formula applies.
FHA
FHA requires every student loan to be included in your liabilities, with no carve-out for deferment, forbearance, or forgiveness programs. You carry the debt until the creditor formally releases you.4HUD. FHA Single Family Housing Policy Handbook Update 15
When the credit report or documentation shows a monthly payment above zero, the lender uses that amount. When the reported payment is zero, the lender uses 0.5% of the outstanding balance.5HUD. Mortgagee Letter 2021-13 FHA does not compare the two and pick the lower one. If your actual payment is $300 and 0.5% of your balance would be $200, the lender uses $300 because that is your real obligation. The tradeoff for including every loan is that FHA’s 0.5% floor is one of the more favorable formulas for borrowers with large balances and modest payments.
VA
VA loans produce both the best and one of the roughest outcomes for borrowers with student debt.
If you can document that your student loans will remain deferred for at least 12 months beyond the mortgage closing date, the VA lets the payment be excluded from DTI entirely.6Veterans Benefits Administration. Circular 26-17-2 – Clarification and New Policy for Student Loan Debts and Obligations A $100,000 balance can count as $0 in monthly debt for qualifying purposes.
When the 12-month deferment threshold is not met, the VA applies 5% of the outstanding balance divided by 12. On a $50,000 balance, that comes to about $208 a month ($50,000 × 5% = $2,500 ÷ 12 = $208).6Veterans Benefits Administration. Circular 26-17-2 – Clarification and New Policy for Student Loan Debts and Obligations Compared to Freddie Mac’s 0.5% figure of $21 on the same balance, that is nearly ten times as much.
Residual Income Also Applies
DTI is only half of a VA file. Underwriters also test residual income, meaning the cash left each month after taxes, housing, and every debt payment, student loans included. The VA publishes minimum residual income tables that vary by region and family size. A single borrower in the South with a loan above $80,000 needs at least $441 in residual income; a family of four in the West needs $1,117.
A veteran who clears the regional residual income figure with room to spare can often get approved even above the 41% DTI benchmark. Student loan payments still reduce residual income dollar-for-dollar, so whether the lender uses the 5% formula or a documented income-driven payment continues to matter.
USDA
USDA rural housing loans resemble FHA. When the reported payment is above zero, the lender uses that amount. When the payment is zero, the lender uses 0.5% of the outstanding balance.7USDA Rural Development. HB-1-3555, Chapter 11 – Ratio Analysis
The wrinkle is income-driven repayment. Because IBR, PAYE, and similar plans can change each year, USDA training materials indicate that these variable payments may not qualify as a usable “actual documented payment,” and the lender may then use a higher percentage of the balance, up to 1%.8U.S. Department of Agriculture. RD-SFH-Ratios1 – Ratio Analysis Only fixed-rate, fixed-term loans with no future adjustments are treated as “fixed payment loans” for this purpose. If you are on an income-driven plan and applying USDA, ask the loan officer which calculation the underwriter will apply before you get too far into the file.
Like FHA, USDA does not let you exclude a student loan for deferment, and loans in forgiveness programs remain your responsibility until the creditor issues a formal release.7USDA Rural Development. HB-1-3555, Chapter 11 – Ratio Analysis
When Someone Else Makes the Payments
If a parent, non-borrowing spouse, or anyone else has been paying a student loan you owe, the debt can sometimes be excluded from your DTI. Fannie Mae allows the exclusion when the lender obtains 12 months of bank statements or canceled checks from the person making the payments, showing a full year of on-time payments with no delinquencies.3Fannie Mae. B3-6-05, Monthly Debt Obligations
Documentation has to be clean. Informal transfers between accounts will not satisfy an underwriter; the payer needs consistent, traceable payments from their own account across the full 12 months. The exclusion applies to non-mortgage debts generally, not just student loans, and the specifics differ across FHA, VA, and USDA. Confirm the exact documentation the program will accept before you build your application around it.
The SAVE Plan Complication
Borrowers enrolled in the SAVE plan, formerly REPAYE, face a specific problem. Because of ongoing litigation, the Department of Education has placed SAVE enrollees into a general forbearance since servicers cannot bill at the amount required by the court’s injunction.9Federal Student Aid. IDR Court Actions The forbearance will hold until the legal situation resolves or servicers can resume billing.
For a mortgage file, that combination is awkward: your credit report likely shows $0, and you are technically in forbearance rather than active repayment. Under Fannie Mae’s guidelines, the lender can apply the 1% formula rather than accept the $0. Under FHA and Freddie Mac, the 0.5% floor kicks in. Either way, the counted figure is probably higher than the payment SAVE was going to charge you.
If you were in SAVE and are heading toward a mortgage application, one option is to switch to an income-driven plan that is still operating, such as IBR or PAYE. An active payment on your credit report, even a low one, gives the lender a real number to use and avoids the percentage-of-balance fallback. Ask your servicer what plans you can move to, and watch the Federal Student Aid site for updates on the litigation.
Documents to Have Ready
Underwriters cannot rely on your description of what you pay each month. Missing paperwork is one of the most common reasons a file stalls. For each federal or private student loan, pull together:
- A current billing statement showing the outstanding balance, monthly payment, and whether the loan is in active repayment, deferment, or forbearance.
- Repayment plan documentation if you are on an income-driven plan, including proof of which plan and the calculated payment. A letter from your servicer or a screenshot from your Federal Student Aid account works.
- A loan verification letter from your servicer if your billing statement shows a $0 payment, confirming the actual calculated payment. Without this, the underwriter will fall back to the program’s percentage formula.
The distinction between a standard plan with fixed payments and an income-driven plan is not paperwork trivia. Several programs treat variable IDR payments differently because those amounts reset each year. When your credit report shows $0 and nothing else supports a lower figure, the formulas above take over, and they almost always produce a higher number than the payment you would actually owe.
Ways to Lower the Counted Payment
Knowing the formulas is only useful if you act on them. A few moves make a real difference:
- Get the right payment on your credit report. If you are on an income-driven plan with a low payment, make sure your servicer has reported that amount. A $0 or missing payment pushes the lender into a formula that almost always produces a higher number. Call your servicer and request a bureau update if needed.
- Attack other debts first. Paying off a $300 car payment improves your DTI far more efficiently than throwing extra cash at $80,000 in student loans. Focus on debts with high payments relative to their balance.
- Choose your program with the calculation in mind. A borrower with $60,000 in deferred student loans faces $600 a month under Fannie Mae’s 1% rule but $300 under Freddie Mac or FHA. If you qualify for more than one program, run the DTI both ways before you pick.
- For veterans, get deferment documentation in order early. Excluding the payment entirely under the 12-month rule is worth more than any formula, but only if you can prove it.
On a $60,000 balance, the amount counted against your DTI ranges from $0 (VA with qualifying deferment) to $250 (VA’s 5% formula), with Freddie Mac and FHA at $300 and Fannie Mae at $600 for a deferred loan. Running those numbers before you start looking at houses tells you which program gives you the most buying power, and which balance is worth chipping down first.