Overview
Student loans are often the largest non-housing debt obligation and can significantly impact mortgage DTI. The monthly payment used in DTI calculations depends on your repayment plan -- and different lenders treat income-driven repayment (IDR) plans differently. Understanding the rules for your loan type prevents surprises during mortgage underwriting.
How lenders count student loan payments in DTI by loan type
| Loan Situation | Payment in DTI (FHA) | Payment in DTI (Conventional) | Strategy |
|---|---|---|---|
| Standard repayment plan | Actual payment | Actual payment | No action needed |
| Income-driven repayment (IDR) | Actual IDR payment | 0.5-1% of balance/month if IDR < 1% | FHA more favorable for low IDR payments |
| Deferment or forbearance | 1% of outstanding balance/month | 0.5-1% of balance/month | IDR may be better than deferment |
| $0/month IDR payment | 0 if $0 is documented | 0.5% of balance per month often used | IDR with documented $0 favorable for FHA |
For borrowers on income-driven repayment plans with low payments, FHA loans often count the actual IDR payment in DTI -- even if it is $0. Many conventional lenders use 0.5-1% of the loan balance monthly if the IDR payment is below that threshold. Borrowers with large student loan balances on IDR often find FHA more accessible.
Key Points
- Income-driven repayment (IDR) plans can dramatically reduce the student loan payment in DTI calculations
- FHA loans are generally more favorable to borrowers with large student debt on IDR
- Refinancing to a private loan may produce a higher payment that hurts DTI more
- Public Service Loan Forgiveness (PSLF) participants should stay on IDR -- which helps DTI
- Document your current payment amount clearly to give lenders the most favorable treatment
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Student Loans and DTI: How Education Debt Affects Mortgage Q
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