How does FHA calculate student loan payment for DTI?

Per HUD Handbook 4000.1 Section II.A.5.b.iv (updated 2021 and still in force April 2026), FHA uses the actual monthly payment reported on the credit bureau if greater than zero. If the credit bureau shows zero payment (typical for income-driven plans or deferment), FHA uses 0.5 percent of the outstanding balance as the qualifying payment. This is a meaningful improvement on the prior 1 percent standard.

How does Fannie Mae calculate student loan payment?

Per Fannie Mae Selling Guide B3-6-05, Fannie uses the actual payment from the loan servicer documentation even if zero under an income-driven plan, provided documentation supports the zero. If documentation cannot confirm a fully amortising payment, Fannie defaults to 1 percent of the balance.

Which programme is friendlier to student loans at 100k balance?

Fannie Mae if your income-driven plan documents a low payment (e.g. $200 per month). FHA if your IBR payment is high or deferred but balance is small. On a $100k balance with deferred IBR, FHA assesses $500 per month (0.5 percent); Fannie can use the documented IBR amount, which may be $0 to $400.

FHA vs Conventional with Student Loan Debt

Student loans drive the FHA-vs-conventional decision for many millennial and Gen-Z buyers. The DTI math differs by programme: FHA assesses 0.5% of balance for deferred or zero-payment loans; Fannie uses the documented payment from the servicer even if it is $0.

Calculation by programme (April 2026 rules)

Scenario	FHA (4000.1 II.A.5.b.iv)	Conventional (Fannie B3-6-05)
Loan in repayment, fully amortising	Use the actual payment	Use the actual payment
Loan deferred	0.5% of balance	1% of balance (default) OR documented amount
IBR / SAVE / PAYE plan	Actual reported (use 0.5% if reported zero)	Actual reported (even if zero with documentation)
Forbearance	0.5% of balance	1% of balance default
Documented IBR payment $0	0.5% of balance (still uses minimum)	$0 with servicer letter

DTI impact: $100k student loan, IBR plan, $250 documented payment

Component	FHA	Conventional
Monthly gross income	$6,500	$6,500
Student loan in DTI	$500 (0.5% of $100k)	$250 (documented IBR)
Auto + cards	$650	$650
Max mortgage payment (at 43% DTI)	$1,645	$1,895
Approx. max home price (5% down, 6.7%)	~$250k	~$295k

If your servicer documents a low IBR payment, conventional may approve you for roughly $45,000 more home than FHA. If your IBR is high or you are in forbearance, FHA usually approves for more.

Documentation to bring

Servicer statement showing current monthly payment and plan type (IBR, PAYE, SAVE, Standard, etc.)
Most recent recertification letter for income-driven plans
If $0 payment: written confirmation from servicer that the $0 amount fully satisfies the monthly obligation
Outstanding balance per servicer (not credit bureau, which may be stale)
Loan type (federal Direct, FFELP, Perkins, private) since some programmes treat private loans differently

Rate disclaimer

Student loan rule treatment has changed multiple times since 2021. Confirm current FHA and Fannie Mae rules with your loan officer at application. Consult a licensed loan officer.

Sources

HUD Handbook 4000.1 Section II.A.5.b.iv (Student Loans): HUD 4000.1
Fannie Mae Selling Guide B3-6-05 (Monthly Debt Obligations): selling-guide.fanniemae.com
Freddie Mac Seller Guide 5401.2 (Student Loans): guide.freddiemac.com
CFPB on student loans and mortgages: consumerfinance.gov

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