Can You Get a Mortgage With Student Loan Debt? The 2026 DTI Rules Lenders Actually Use

Owing $45,000 in federal student loans does not put a mortgage out of reach. What actually decides the outcome is a single number your lender pulls from a formula, not from your balance, and that formula changes depending on which agency backs the loan and which repayment plan you happen to be on. Two borrowers with identical debt and identical income can qualify for mortgages $40,000 apart in size, purely because of how their student loan payment gets counted.

With the 30-year fixed rate averaging 6.66% as of July 30, 2026, and with the federal repayment system rebuilt from the ground up on July 1, 2026, the rules on this have shifted more in the past month than in the previous five years combined. Here is exactly how Fannie Mae, Freddie Mac, FHA, VA and USDA loans count your student debt, why the new Repayment Assistance Plan changes the math in your favor, and what to do before you apply.

The DTI Math, Not the Balance, Decides This

Lenders do not underwrite a mortgage against your $45,000 or $95,000 balance. They underwrite it against your debt-to-income ratio, the share of your gross monthly income already spoken for by debt payments. Add up every recurring monthly debt, divide by gross monthly income, and that is your back-end DTI. Conventional loans generally allow up to 50% with strong compensating factors, though 45% is a more realistic practical ceiling for most files. FHA typically caps out around 43% to 50% depending on your credit score and reserves. USDA sits closer to 41%. VA does not use a hard DTI ceiling at all; it leans more heavily on residual income, the cash left over each month after every obligation is paid.

The student loan line in that calculation is where the real variation happens, and it comes down to one question: does your credit report show an actual monthly payment greater than zero? If yes, in nearly every program that reported figure is what counts. If the payment shows as $0, because you are on an income-driven plan calculating to nothing, in deferment, or in your grace period, each agency has its own rule for what number to substitute instead.

Notice the pattern. Every fallback rule only fires when the real payment is $0 or missing from the file. Freddie Mac’s own homebuyer education team puts it plainly: depending on how many payments remain and whether your loan is in forbearance, you may be able to get it excluded entirely, so it is always worth asking a HUD-certified counselor or your loan officer before assuming the fallback applies to you.

Private student loans work differently, and more simply. Because private lenders do not offer income-driven repayment, there is no $0-payment scenario to plan around. Every program above treats a private loan the same way: the actual payment on your credit report, full stop, with no percentage-of-balance fallback and no forbearance carve-out. If you already refinanced federal loans into a private one for a lower rate, it is worth knowing you traded away that flexibility for DTI purposes along with everything else RAP and IBR offer.

Why RAP Changes Your Qualifying Power

The Repayment Assistance Plan, RAP, launched July 1, 2026 as the federal government’s new default income-driven plan. RAP sets your payment at 1% to 10% of your total adjusted gross income, and by law it can never fall below $10 a month, not even for the lowest earners. That detail sounds minor. For mortgage qualifying, it is the whole story.

The older income-driven plans, PAYE, ICR, and the discontinued SAVE plan, could all calculate down to a genuine $0 monthly payment for low earners. A documented $0 is exactly the trigger that sends Freddie Mac, FHA, and USDA straight to their 0.5% balance fallback, and can push Fannie Mae toward its 1% fallback too. RAP’s $10 floor means that trigger almost never fires. A RAP borrower nearly always has a real, low, documentable payment on file, and every program above is built to use the documented number over a percentage-of-balance estimate whenever one exists.

Run the numbers on a borrower earning $45,000 a year with $45,000 in federal loans. Under RAP’s published sliding scale, confirmed in the Department of Education’s own fact sheet on the plan, that income lands in the 4% band, an estimated $150 a month. Compare that against the fallback rules other borrowers can get stuck with on the exact same balance: $450 a month under Fannie Mae’s 1% rule, or $225 a month under the 0.5% rule most other programs use. The gap between the worst case and the RAP-documented figure is $300 a month, and that $300 does not disappear, it becomes room for an actual mortgage payment instead.

What That $300 a Month Actually Buys

At the 6.66% rate Freddie Mac reported for the week of July 30, 2026, an extra $300 a month in mortgage payment room supports roughly $46,000 more in loan amount over a 30-year term. That is not a rounding error. For a first-time buyer already stretching to hit a down payment, it can be the difference between a starter condo and a small single-family home, or between qualifying and not qualifying at all in a tighter market.

The table below carries the same borrower through a full purchase scenario, showing how the student loan treatment alone moves the maximum home price a lender will approve.

Loan amounts are illustrative, calculated at 6.66% over 30 years from the payment budget alone and before taxes, insurance, and HOA dues reduce what is actually available for principal and interest. Your own numbers will move with your income, credit score, and existing debt, but the direction of the gap holds across almost every income level.

Before You Apply: The Moves That Actually Help

Get your repayment plan documented, not just enrolled. Being “on RAP” is not enough on paper. Your lender needs a statement or servicer letter showing the actual dollar figure. Request it before you apply, not during underwriting, since servicer response times can run weeks.

Recertify your income if it changed recently. RAP and IBR payments recalculate off your most recent tax return. A borrower whose income dropped and never recertified could be carrying a stale, higher payment that is quietly working against their DTI.

Shop the loan program, not just the lender. The same balance and the same $0-payment scenario can produce a materially different DTI depending on whether you go conventional, FHA, or VA. If you are a veteran or reservist, comparing FHA, conventional, and VA side by side is worth doing before you assume conventional is cheapest.

Check whether a Parent PLUS loan is quietly on your own report. Cosigned or transferred debt sometimes still shows on a credit file long after responsibility shifted. An error here inflates DTI for no reason, and it is worth pulling your full report before you apply.

Get your full credit and DTI picture in order first. Student loan treatment is one input among several. The newer VantageScore 4.0 and FICO 10T models weigh some of this differently than older scores did, and understanding what lenders actually weigh in your full profile is worth doing before you start touring homes, not after an offer is accepted.

None of this requires paying off your student loans before you buy. It requires knowing which number your specific lender is going to use, getting that number documented in writing, and picking the loan program that treats your situation best. For most RAP borrowers in 2026, that combination adds up to more house than the old rules would have allowed, not less. If a refinance or a different loan structure is also on the table, running the exact refinance breakeven math alongside your purchase numbers, or checking whether a government assistance program fits your down payment gap, rounds out the full picture before you sign anything. And if this is your first purchase entirely, the complete 2026 mortgage guide is the right place to start before narrowing down a lender.