By Ziya Y. · 23 Years Banking & Mortgage · Updated May 2026
📖 Real Scenario
Michael owns a duplex. He lives in one unit and rents the other for $1,800/month. His lender counts 75% of that rent ($1,350) toward his qualifying income. This extra $1,350/month gives him $90,000 more in buying power. He's house hacking his way into a $480,000 property while his tenant pays a third of his mortgage.
Q: How much rental income can I use to qualify?
75% of gross monthly rent. If your tenant pays $2,000/month, lenders count $1,500. The 25% discount accounts for vacancies, repairs, and management. This 'net rental income' is added to your other qualifying income.
Q: Do I need rental history to use rental income?
For existing rentals you own: yes, 2 years of Schedule E on your tax returns. For a property you're buying with rental units: lenders will use 75% of the market rent from the appraisal — even with no rental history, because you're buying it as an investment.
Q: Can I use Airbnb income?
Difficult. Most conventional lenders require 2 years of short-term rental income on tax returns. Fannie Mae has specific guidelines for Airbnb income. Expect more documentation and some lenders to decline entirely. Non-QM lenders are more flexible.
Q: What is house hacking?
Buying a multi-unit property (2-4 units), living in one unit, and renting the others. It's one of the most powerful wealth-building strategies available — your tenants help pay your mortgage, you get owner-occupied financing (lower rates than investment loans), and you build equity.
Not financial advice. Educational content based on 23 years of mortgage experience. Consult a licensed MLO for your specific situation.