Real ChatGPT answer · index seedHwhZ4ddwRx4completeReal estate · buying a homecommercial

What formula do lenders use for front-end versus back-end debt-to-income ratios when evaluating a primary residence purchase alongside an existing investment property mortgage?

ChatGPTgpt-62 queries11/1/2026
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Fan-out diagram

The searches the AI actually ran for this prompt.

SEED QUERY
What formula do lenders use for front-end versus back-end debt-to-income ratios when evaluating a primary residence purchase alongside an existing investment property mortgage?
2 real searches · 1 real-search pass
Fannie Mae debt-to-income ratio rental income investment property mortgage liability calculation Schedule E PITIA selling guideGoogle ↗
OBSERVED
Fannie Mae maximum DTI ratio 36 45 50 Desktop Underwriter selling guideGoogle ↗
OBSERVED

Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

Query classes

Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.

Classifying 2 queries…

Searches and sources

ChatGPT2 real searches · gpt-6
Fannie Mae debt-to-income ratio rental income investment property mortgage liability calculation Schedule E PITIA selling guide Google ↗
Fannie Mae maximum DTI ratio 36 45 50 Desktop Underwriter selling guide Google ↗
  1. Debt-to-Income Ratios · selling-guide.fanniemae.com
  2. Selling Guide_4.22.2026 · singlefamily.fanniemae.com

Queries

2 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
Fannie Mae debt-to-income ratio rental income investment property mortgage liability calculation Schedule E PITIA selling guide
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1
Fannie Mae maximum DTI ratio 36 45 50 Desktop Underwriter selling guide
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1