Can I buy a house while I still have student loans?

Yes. Student loans are counted as a monthly debt in your debt-to-income ratio, not as a disqualifier. What matters is the payment figure the underwriter is required to use — which depends on the loan program and on whether your loans are in repayment, deferment, or forbearance.

Does a $0 income-driven repayment payment count as $0?

It depends on the program. Fannie Mae's guide permits a documented income-driven payment, including a $0 payment, when the repayment terms support it. FHA and Freddie Mac generally substitute 0.5% of the outstanding balance when the reported payment is zero. Ask the loan officer to price the file both conventional and FHA before assuming.

Should I pay off my student loans before applying for a mortgage?

Not necessarily, and rarely all of them. Paying off one loan servicer line entirely removes that payment from your DTI, while a partial paydown on a large balance may not move a percentage-of-balance calculation much. Cash used for payoff also stops being available for down payment and reserves. Model both before moving money.

Do deferred student loans count against my DTI?

Under FHA, deferred loans still count — the underwriter uses 0.5% of the outstanding balance if no payment is reported. VA guidance excludes student loan payments deferred at least 12 months beyond closing. Conventional programs generally count deferred loans using a percentage of balance or documented repayment terms.

Does switching to an income-driven repayment plan help me qualify?

It can, on programs that allow a documented plan payment to be used. The switch has to be processed and documented before underwriting, which can take weeks with a servicer, so it is a pre-approval move rather than a mid-escrow fix.

Will a non-occupant co-borrower fix a high student loan DTI?

Sometimes. FHA and several Fannie and Freddie programs allow a non-occupant co-borrower whose income is added to the qualifying ratio — but their debts are added too. It helps when the co-borrower's income-to-debt profile is stronger than yours, and does nothing when it isn't.

Do student loans affect my mortgage rate or just my approval?

They affect approval through DTI. They affect pricing indirectly, since higher DTI can push a file into a tier with pricing adjustments or out of automated approval into manual underwriting, which is more restrictive.

How Student Loans Affect Mortgage Approval and DTI

The balance on your student loans is not what sinks a mortgage file. The payment figure the underwriter is required to use is — and that figure is different under FHA, Fannie Mae, Freddie Mac, and VA.

TL;DR

Student loans count in your back-end DTI as a monthly payment, and each agency has its own rule for what that payment is.
FHA: uses the payment on the credit report; when that payment is $0 or the loan is deferred, it substitutes 0.5% of the outstanding balance.
Fannie Mae: permits a documented repayment-plan payment — including a $0 income-driven payment — when the documentation supports it; otherwise falls back to a percentage of balance.
Freddie Mac: when the reported payment is $0, generally uses 0.5% of the outstanding balance.
VA: excludes payments deferred at least 12 months past closing; otherwise uses documented terms or a percentage-of-balance calculation.
The three moves that actually change outcomes: switch programs, pay off one full loan line, or add a non-occupant co-borrower.

Why the program you choose decides the file

Debt-to-income is the ratio of your monthly debt payments to your gross monthly income. Our DTI ratio explainer covers the general math — what counts as debt, what counts as income, and where the ceilings sit. What that article does not cover, and what decides most student loan files, is that the same borrower with the same loans can carry a different student loan payment on paper depending on which program the loan officer runs.

Consider $90,000 in federal student loans on an income-driven plan with a documented $0 payment. Depending on the program's rule:

Program treatment | Monthly figure used

Documented $0 income-driven payment accepted | $0

0.5% of outstanding balance | $450

1% of outstanding balance | $900

On a $7,000 gross monthly income, the difference between $0 and $900 is roughly 13 percentage points of DTI. That is the entire distance between a comfortable approval and a denial, produced by nothing but a guideline choice.

FHA: the 0.5% of balance rule

FHA's rule is written into the HUD Single Family Housing Policy Handbook 4000.1 and is the most mechanical of the four.

If the credit report shows a monthly payment greater than $0, the underwriter uses that payment.
If the credit report shows $0, or the loan is in deferment or forbearance, the underwriter uses 0.5% of the outstanding balance.
Deferment status does not exempt the debt. A loan that will not require a payment for two more years still generates a qualifying payment today.

FHA's offset is its DTI ceiling. Automated approvals routinely clear back-end ratios well above 50% with compensating factors — reserves, residual income, a long history of stable employment. A borrower whose student loans generate a $450 phantom payment under the 0.5% rule may still fit inside FHA's tolerance where a conventional file would not.

The trade-off is mortgage insurance for the life of the loan below 10% down. See FHA loan requirements and the FHA loan type overview for the full picture, and FHA vs conventional for the lifetime cost comparison.

Fannie Mae and Freddie Mac: where $0 payments diverge

Both agencies start from the credit report, and both allow documented loan paperwork to override it. They part ways on what happens when the documented payment is zero.

Fannie Mae (Selling Guide B3-6-05) allows the lender to use the monthly payment shown on the borrower's student loan documentation when the credit report figure is missing or incorrect. Where an income-driven repayment plan produces a $0 payment and the documentation shows it, that $0 can be used for qualifying. Where nothing is documented, the guide falls back to a percentage of the outstanding balance or a calculated fully amortizing payment.

Freddie Mac (Seller/Servicer Guide 5401.2) is stricter on the zero case. When the monthly payment reported is $0, Freddie generally requires 0.5% of the outstanding balance rather than accepting the zero.

Both agencies are moving targets — guideline bulletins update several times a year. The practical instruction for a borrower is not to memorize the current text but to ask the loan officer directly: "Run this both ways. What DTI does DU produce, and what does LPA produce?" Desktop Underwriter and Loan Product Advisor are separate engines, and a file that gets refer/eligible from one can get approve/eligible from the other on identical inputs.

Program | Payment reported greater than $0 | Payment reported as $0 or deferred

FHA | Use credit report payment | 0.5% of outstanding balance

Fannie Mae | Use credit report or documented payment | Documented income-driven payment may be used, including $0; otherwise percentage of balance

Freddie Mac | Use credit report payment | Generally 0.5% of outstanding balance

VA | Use documented payment | Excluded if deferred 12+ months past closing; otherwise documented terms or percentage-of-balance calculation

VA: deferral is a real exclusion

VA is the only one of the four where student loans can drop out of the ratio entirely. Under VA lender guidance, a student loan payment deferred at least 12 months beyond the closing date is excluded from the debt calculation. That is not a percentage discount — it is a zero.

When the loan is not deferred that far out, VA lenders document the actual repayment terms. Where terms are not available, a percentage-of-balance calculation is used, commonly cited as 5% of the outstanding balance divided by 12 — which produces roughly the same monthly figure as the 0.5% rules the other programs apply.

VA also runs a residual income test alongside DTI: a regional minimum of income remaining after all housing and debt obligations. For a borrower with heavy student debt and strong income, residual income is often the more forgiving test. Details in the VA loan requirements guide and the VA loan type page.

Worked example: the $22-per-month decision

Hypothetical borrower, structured to show how the moves interact:

Gross monthly income: $7,200
Car payment: $480
Credit cards, minimum payments: $210
Student loans: $68,000 across four servicer lines, income-driven plan, credit report shows $0
Target purchase: $425,000 with 5% down, estimated PITI of $2,850

Under a 0.5% of balance rule: student loan payment counted at $340. Total monthly debt = $2,850 + $480 + $210 + $340 = $3,880. Back-end DTI = 53.9%. Outside conventional tolerance; inside FHA's range with compensating factors.

Under a documented $0 income-driven payment: total monthly debt = $3,540. Back-end DTI = 49.2%. Now a conventional automated approval is plausible.

Now change one input. One of the four student loan lines is a $6,200 balance. Paying it off entirely removes $31 from the 0.5% calculation — trivial. But the same $6,200 applied to the car loan payoff removes $480 from the ratio, dropping DTI to 47.2% under the 0.5% rule. The lesson is not "pay off student loans." It is pay off the highest-payment-per-dollar-of-balance debt, which is almost never the student loan.

Where paying a student loan does work: when a single small line carries a disproportionate reported payment — a private loan with a $265 payment on a $9,000 balance, for example. Retiring that line removes the full $265. Run the affordability calculator with each scenario before committing cash you also need for the down payment.

The three moves that actually change the outcome

1. Switch the repayment plan — before pre-approval, not during escrow

Moving from a standard 10-year plan to an income-driven plan can cut a reported payment substantially, and on programs that accept the documented plan payment, that flows straight into DTI. Servicer processing can take several weeks and the underwriter needs documentation showing the plan is in effect. This is a move you make two to three months before applying, not after you are under contract. Federal repayment plan options and the application process are on the Federal Student Aid site; tax treatment of forgiven balances is covered by the IRS.

Note the direction of the trade: a lower monthly payment usually means more interest paid over the life of the loan. You are buying DTI room with long-run cost.

2. Pay off a single full line, not a slice of the total

Underwriters remove a debt from the ratio when the account is paid to zero and closed. A partial paydown on a $60,000 balance moves a percentage-of-balance figure by pennies on the dollar. Paying one servicer line to zero removes its whole payment. Look at the payment-to-balance ratio across every line you carry and retire the worst one.

Also check the reserve requirement before you spend. Cash that leaves your account for a payoff is cash not counted as reserves, and reserves are a compensating factor that gets high-DTI files approved.

3. Add a non-occupant co-borrower

FHA permits a non-occupant co-borrower, and Fannie's HomeReady and Freddie's Home Possible allow non-occupant income in qualifying. The co-borrower's income raises the denominator — but their debts raise the numerator too. A parent with a paid-off house and modest debt helps a lot. A parent with their own mortgage, car, and cards may help very little or hurt.

Ask the loan officer to run the file with and without the co-borrower before anyone signs anything. It is a five-minute AUS run, and the answer is sometimes counterintuitive.

What to bring to the loan officer

Student loan files fall apart on documentation, not on math. Bring:

A current statement for every servicer line showing balance, monthly payment, and plan type
Written confirmation of the repayment plan if you are on an income-driven plan — the plan approval letter, not a screenshot of a $0 balance due
Deferment or forbearance letters with specific end dates, since VA's 12-month exclusion turns on the date
A payoff quote for any line you are considering retiring

The pre-approval documents checklist covers the rest of the file. If your purchase price is near your county's conforming ceiling, confirm the limit with the conforming limit lookup — a jumbo file applies its own, generally tighter, DTI standards. Borrowers in Washington and other high-cost states can start with the state conventional loan overview.

Sources & verification

Agency guidelines are revised on a rolling basis. Confirm the current rule with a licensed loan officer for your specific file rather than relying on any summary, including this one.

Disclosure

MLO Finder is a directory of mortgage loan officers, not a lender. We don't originate loans, set rates, or guarantee approval. Verify any loan officer's current licensing through NMLS Consumer Access before working with them. Information here is educational and not personalized financial advice — consult a licensed loan officer or financial planner for guidance specific to your situation.

How Student Loans Affect Mortgage Approval and DTI