Checking prequalified rates on Sparrow does not affect the cosigner’s credit score.

However, if the cosigner is included on the formal loan application with one of our lending partners, there will be a temporary impact on the cosigner's credit score. This is because your cosigner must undergo a hard credit check, which can temporarily cause their credit score to drop a few points. Luckily, after a few months, their credit will likely head back up, assuming all else stays normal.