Welcome to Mortgage Lending Explained, my consumer education blog dedicated to bringing clarity to the mortgage process.
Mortgage Lending Explained is published on Substack at www.JSWhaldo.Substack.com and is also featured here on JSWhaldo.com. Wherever you choose to read, I encourage you to comment, ask questions, and subscribe.
The Mortgage Lending Explained newsletter is published with each new article and podcast episode. My monthly JSWhaldo newsletter focuses primarily on travel and lifestyle content, highlighting new projects and stories from across the site.
After more than 30 years in mortgage underwriting, I write these articles to help consumers understand how mortgage loans really work. My goal is to explain lending in plain English, separate fact from fiction, and provide insight into how mortgage underwriters evaluate loan applications.
Whether you're buying your first home, refinancing, exploring reverse mortgages, or simply curious about credit and lending, I hope you'll find useful information and practical answers here.
Written by J.S. Whaldo, a retired mortgage underwriter with more than three decades of industry experience.
Welcome, and enjoy exploring Mortgage Lending Explained.
Using Passive Income to Qualify for a Mortgage
Passive income can come from a wide range of sources. Social Security, retirement distributions, investment income, royalties, and support payments all fall into this category.
Some of these do not feel passive at all. Social Security is a good example. It represents years of work and contributions. Regardless of how it is labeled, it is treated under the same set of rules as other non-employment income.
Self-Employment Qualifying Income: C-Corps Made Simple
Finishing the Self-Employment Series: C-Corp Income Made Clear for Mortgage Qualification
Self-Employment Qualifying Income: S-Corporations Made Simple
S-Corp Income: What Counts for Your Qualifying Income and What Doesn’t
Self-Employment Qualifying Income: Partnerships Made Simple
If you own a partnership, determining which income counts towards a mortgage can be confusing. In this article, I’ll walk you through how mortgage underwriters determine qualifying income from partnerships. I’ll show you how to use your K-1 and the partnership’s 1065 tax return, with a practical example, so you can see exactly how it works.
Self-Employment Qualifying Income: Understanding Sole Proprietor Schedule C Earnings
How Mortgage Underwriters Determine Qualifying Income From Your 1040 Schedule C.
Self-Employed and Applying for a Mortgage? Start Here
We’re breaking down the different types of businesses and the documents lenders need so you can see exactly what counts as income.
Qualifying Income from Part-Time Jobs, Seasonal Work, and Side Gigs
How Underwriters Evaluate Part-Time Jobs, Seasonal Work, and Side Gigs for Mortgage Qualification
How Lenders Calculate Your Mortgage Qualifying Income: Commission Income and Schedule C (Sole Proprietorship)
Income Basics: How Lenders Calculate Your Qualifying Income for a Mortgage Part Two
How Lenders Calculate Your Mortgage Qualifying Income: Salary, Hourly, Overtime/Bonus Explained
Over the past few weeks, we’ve talked about credit, liabilities, debt-to-income, and assets.
Now, we’re moving into one of the most important, and often confusing, parts of getting a mortgage: income calculation.

