Buying a home with student loans: how each loan program counts your debt

Student loans don’t disqualify you from buying a home. What they do is change the math, and the math depends heavily on which loan program you choose. Two buyers with identical incomes and identical student loan balances can qualify for very different houses depending on whether they go conventional, FHA, or VA. The difference can be $100,000+ in purchase price.

This guide is the rule book. Bookmark it for when your loan officer quotes you a number that doesn’t match what you expected.

How lenders count student loans

Lenders have to assign a monthly payment to every student loan on your credit report so they can include it in your DTI. If you’re on a standard 10-year repayment plan, that’s easy: the payment on your statement is what they use.

The complications start with deferment, forbearance, and income-driven repayment plans (IDR) like IBR, PAYE, and the new RAP (SAVE is gone; more below). For these, lenders fall back on program-specific rules, and those rules look nothing alike.

Conventional: Fannie Mae

Fannie Mae’s rules (the most generous for IDR borrowers, and in place since the late 2010s):

• Standard repayment: use the actual payment from your credit report.
• Income-driven plan with $0 payment: use $0, as long as the lender documents that your IDR payment is $0.
• Deferred or in forbearance (not a $0 IDR payment): the lender may use 1% of the outstanding balance or a fully-amortizing payment based on your documented repayment terms. Either is allowed, so ask for the lower one.

If you’re on IBR or PAYE with a documented $0 payment, conventional Fannie is almost always your best loan program for student loan treatment.

(A note on SAVE: SAVE is over. Courts blocked it in 2024, the One Big Beautiful Bill Act (July 2025) ordered it wound down, and a court settlement finalized in 2026 ended it. Former SAVE borrowers, many of whom sat in a $0 administrative forbearance, are being moved to IBR, the new Repayment Assistance Plan (RAP), or a standard plan during 2026. A forbearance is not an IDR payment, so Fannie treats it under the 1%/amortizing rule above, not as $0. RAP, which launched July 1, 2026, has a $10 minimum payment, so it never documents $0; IBR still can at low incomes. Get onto your new plan and have the servicer document the payment before you apply.)

Conventional: Freddie Mac

Similar on standard repayment, but stingier on $0 IDR payments:

• Standard repayment: actual payment from credit report.
• Income-driven plan with $0 payment: use 0.5% of the outstanding balance. Unlike Fannie, Freddie doesn’t accept a $0 payment.
• Deferred or no payment showing: use 0.5% of the outstanding balance. Always. No “lower of” option like Fannie.

For deferred loans, 0.5% < 1%, so Freddie is better than Fannie when no actual payment is documented. For IDR with a documented payment above $0, the two are identical.

Most lenders submit conventional files to both Fannie’s DU and Freddie’s LP and use whichever approves. Ask your loan officer to do this if your file is borderline.

FHA

FHA’s rules used to be brutal but softened in 2021:

• Any payment above $0 (standard, graduated, or IDR): use the payment on your credit report or the documented actual payment.
• $0 payment (deferred, forbearance, IDR with $0): use 0.5% of the outstanding balance.
• Only the reported payment counts, whatever the loan’s status. A $0 IDR payment falls to the 0.5% rule.

FHA’s 0.5% phantom payment is what most often blocks borrowers on IDR. A $100k balance creates a $500/mo phantom debt under FHA, even if your real IBR payment is $0. That $500/mo costs you roughly $75,000 of borrowing power.

VA

VA is generous but very specific:

• Deferred 12+ months past closing: exclude the loan entirely from DTI. Requires explicit documentation that no payment will be due in the next 12 months.
• Otherwise: use a threshold payment of 5% of the balance divided by 12, or the credit-report payment if it’s higher. 5% ÷ 12 ≈ 0.417%, so VA’s threshold is slightly lower than FHA’s 0.5%. If the reported payment is lower than the threshold, the lender can use it only with a servicer statement documenting the actual payment terms.

VA also requires you to pass the residual income test (how much cash you have after paying everything, calculated by region and family size), which can backstop a high DTI driven by student loans.

USDA

USDA is similar to FHA:

• Fixed payment plans (standard): use the actual payment from the credit report or loan documentation.
• Non-fixed payments (IDR, graduated): a documented payment above $0 is generally used; if it’s $0, use 0.5% of the balance. (Some lenders apply the higher of 0.5% or the reported payment to any non-fixed plan, as USDA’s 2019 handbook change read; ask.)
• Deferred or in forbearance: 0.5% of balance.

USDA loans are limited to designated rural areas (and the income limits are real), so they’re a smaller subset, but worth considering if you qualify geographically.

Forbearance and deferment

Forbearance and deferment are treated nearly identically across programs:

• Conventional Fannie: lower of 1% of balance or documented payment
• Conventional Freddie: 0.5% of balance
• FHA: 0.5% of balance
• VA: 5% of balance ÷ 12 (or a lower documented payment), or exclude if deferred 12+ months past closing
• USDA: 0.5% of balance

The COVID-era federal student loan forbearance ended in 2023, and the SAVE administrative forbearance that followed is winding down as former SAVE borrowers move to other plans during 2026. If you’re still in that forbearance when you apply, expect the forbearance rules above to apply, not $0. Switching to IBR (which can document a $0 payment at low income) or RAP before you apply usually helps. Private student loans in forbearance trigger the same rules.

IBR / PAYE with a $0 payment

If your IDR-calculated payment is $0 (possible on IBR or PAYE at low income; RAP’s minimum is $10), conventional Fannie is much better than Freddie, FHA, or USDA:

Program	$0 IDR payment treatment
Conv. Fannie	$0
Conv. Freddie	0.5% of balance
FHA	0.5% of balance
VA	5% of balance ÷ 12, unless a servicer statement documents a lower payment (many lenders won’t go to $0)
USDA	0.5% of balance

For a borrower with $80k in loans and a $0 IBR payment, the conventional vs FHA difference is $400/mo of phantom debt, enough to swing roughly $60,000 of purchase price.

Even if you’d normally consider FHA for the lower down payment, run the numbers both ways. Conventional 97 (3% down) often wins for IDR borrowers despite the slightly higher down payment.

PSLF and forgiveness: doesn’t help today

Public Service Loan Forgiveness, IDR forgiveness after 20–25 years, and any other future forgiveness program does not lower your DTI today. Lenders care about your current required payment, not your future projected balance.

If you’re 8 years into PSLF and have $200k of loans on a $0 IBR payment, the lender treats you exactly the same as someone who just borrowed $200k and has a $0 IBR payment.

A worked example

Alex earns $90,000 ($7,500/mo gross) and has:

• Car payment: $350/mo
• Credit card minimums: $50/mo
• Student loans: $100,000 balance, on IBR, $0/mo documented payment

Conventional Fannie:

• Total non-PITI debt: $350 + $50 + $0 = $400/mo
• At a 50% back-end DTI (a typical DU approval ceiling): max total debt = $7,500 × 0.50 = $3,750
• Max PITI: $3,750 − $400 = $3,350/mo

FHA:

• Total non-PITI debt: $350 + $50 + (0.5% × $100k) = $350 + $50
  • $500 = $900/mo
• At the same 50% back-end DTI: max total debt = $7,500 × 0.50 = $3,750
• Max PITI: $3,750 − $900 = $2,850/mo

The phantom $500/mo student loan payment costs the FHA file $500/mo of PITI room, roughly $75,000 of purchase price. FHA can sometimes approve a higher DTI than 50%, but it would take about 57% to match. And once you factor in FHA’s lifetime mortgage insurance premium (MIP) on loans with <10% down originated after June 2013 vs. removable PMI on conventional, conventional comes out ahead.

Run your version in the DTI Scenario Planner toggling between the program rules.

Strategies to qualify

Roughly in order of bang-for-buck:

1. Re-pull your DTI under different programs

Most loan officers default to recommending whichever program has the lowest down payment. For student loan borrowers, the program with the most favorable student loan treatment may save you far more than the down payment difference.

Ask your loan officer to run scenarios for conventional Fannie, conventional Freddie, and FHA at minimum. Compare the max purchase price under each.

2. Refinance student loans to a lower payment before applying

If you’re on a 10-year standard repayment with a $1,200/mo payment, refinancing federal loans to a 20-year private loan at a $700/mo payment lowers your DTI hit by $500/mo, worth roughly $75,000 of purchase price.

The catch: refinancing federal loans to private gives up forbearance protections, IDR options, and PSLF eligibility. Only do this if you’re sure you don’t need those protections.

3. Pay down a high-balance loan to reduce phantom payments

If you’re subject to the 0.5% or 1% rule (deferred, FHA, etc.), $10,000 paid against the principal lowers your phantom payment by $50–$100/mo. Worth ~$7,500–$15,000 of purchase price.

This is one of the few places where prepaying a low-rate student loan makes financial sense: the borrowing-power gain can be larger than the lost interest deduction.

4. Switch IDR plans to lower the documented payment

If you’re on a plan that calculates a payment based on your income, increasing retirement contributions, HSA contributions, or business expenses to reduce AGI lowers the IDR payment. If your current IDR payment is $400/mo and you can recertify at $200/mo based on a lower AGI, that’s $200/mo of DTI room, about $30,000 of purchase price.

5. Choose conventional over FHA when on $0 IDR

If you’re on IBR or PAYE with a $0 payment, conventional almost always beats FHA. The 3% conventional down vs 3.5% FHA down is a $2,500 difference on a $500k house. The DTI math difference can be $50,000+ of purchase price.

What not to do

• Don’t pay off small student loans during application. Same caution as any other debt: it can affect credit and underwriting timing.
• Don’t refinance to private loans without understanding what you’re giving up. PSLF eligibility is gone forever the moment you refinance.
• Don’t assume your loan officer ran the right program. Many default to FHA for “first-time buyers” out of habit. For IDR borrowers, that’s often the wrong call.
• Don’t go into forbearance to “clear up” your DTI. Forbearance triggers the 0.5%/1% phantom payment under most programs, usually higher than your real IDR payment.

Common mistakes

• Assuming all lenders apply the rules the same way. They don’t. Lender overlays vary: some big-bank retail shops still impose the old 1% rule on Fannie loans even though agency guidelines allow $0. Get a second opinion if a loan officer says “we can’t do that.” A correspondent lender or broker can often run the same file to a different investor without overlays.
• Forgetting that documented payment beats balance percentages. Always document your actual payment with a current servicer statement dated within 30 days of application.
• Not asking the loan officer to run both DU and LP/LPA. Most lenders default to one. For student-loan-heavy files, run both and pick the better finding. Fannie’s DU and Freddie’s LP treat student loans differently in marginal cases.
• Not applying for the loan program with the most favorable treatment. This is the biggest preventable mistake.
• Treating PSLF as if it lowers DTI. It doesn’t. Future forgiveness is invisible to underwriting.
• Ignoring the conventional Freddie option when Fannie’s 1% rule hurts. For deferred loans without documented payments, Freddie’s 0.5% can be the difference.

Tools you’ll use

• DTI Scenario Planner: toggle between program rules
• Affordability calculator: max house under each program
• Credit Score Impact (LLPA): conventional vs FHA cost by score
• Mortgage Calculator: full PITI by program
• PMI Removal calculator: conventional PMI vs FHA MIP long-term cost
• Closing Cost Estimator: total cash to close

For broader program comparison, see the loan types guide.