Mortgage Guide

Affordability

Credit Score and Your Mortgage

Published by the Mortgage Guide editorial team. Rate assumptions and content updated October 2026. This page is educational. It is not a loan offer, approval, or personalized financial advice.

Score is an input to the lender, not to our formula

The amortization formula needs a rate, a balance, and a term. It does not need a score. Inventing '680 gets 6.5%' would be a fake price sheet.

If two lenders quote different rates, put both in Compare Scenarios. The score may be part of why the rates differ. The math only needs the rates.

PMI is where score often shows up in cash

A lower score can mean a higher annual PMI rate on a conventional loan. The PMI field is editable for that reason. The 0.50% start is not a score-based quote.

FHA has its own credit standards. The FHA page flags a down payment under 3.5% because that is a common program minimum, not because we pulled your credit.

What to type instead of a score
Quote lineField
Note rateInterest rate
Annual PMIPMI rate or monthly PMI
APRDo not use it as the payment rate

Calculators

Related guides

Sources

Common questions

Can I improve the result by typing a higher score?

There is no score field. Change the rate or PMI only when a quote supports it.

Which score do lenders use?

Mortgage lenders often use a specific model and the middle of three bureau scores. This site does not retrieve a report.