The push to modernize mortgage underwriting by incorporating alternative data—such as rent payments and buy-now-pay-later (BNPL) histories—is creating a growing information gap for consumers, according to HousingWire. As lenders adopt these broader credit metrics, borrowers may lack the context needed to understand how their financial behaviors are being evaluated.

This shift is not universal across all markets or lenders, but the trend signals a fundamental change in how creditworthiness is assessed. Consumers who have built thin credit files through traditional channels may suddenly find themselves scored on patterns they did not realize were being tracked, such as routine BNPL usage or on-time rent payments.

For mortgage applicants, the move could alter affordability calculations and purchasing power in unpredictable ways. A borrower who relies heavily on BNPL for everyday purchases might see a credit score shift that changes their interest rate or loan eligibility, without clear guidance on how to manage that impact.

The article calls for integrating financial counseling directly into the lending process to help borrowers navigate these evolving rules. Without education, the data intended to expand access could instead confuse or disadvantage those new to the system.

Some industry observers caution that credit modernization is still in early stages and may take years to standardize. The gap may be less of a crisis than a transitional phase as regulators and lenders work to align new data sources with consumer protections.