Does a co-signer's income count toward personal loan qualification?

How co-signer income is used: The lender typically combines both incomes for the income side of the DTI ratio. For example, if you earn $3,000/month and your co-signer earns $4,000/month, the lender may use $7,000/month as the qualifying income. This dramatically improves DTI if your existing debt payments are the constraint on approval.

Co-signer credit score vs income: Different lenders weight these differently. Some focus primarily on the primary borrower's credit score and use co-signer income only to verify repayment ability. Others use the co-signer's credit score as the qualifying score if it is stronger. Clarify with the specific lender which approach they use.

Co-signer vs co-borrower income treatment: A co-borrower's income is fully included. A co-signer's income may be treated somewhat differently depending on the lender - some treat co-signers identically to co-borrowers for income purposes; others place more weight on the primary borrower's income.

Documentation required: The co-signer must submit their own income documentation (pay stubs, W-2, tax returns) just as the primary borrower does. Both undergo credit checks with hard inquiries.

Impact on co-signer's DTI: The loan obligation appears on the co-signer's credit report and is counted in their own DTI calculations for future borrowing. A co-signer who is planning to apply for a mortgage soon should understand that co-signing adds a debt obligation to their credit profile.