Why the "P&I" payment on Zillow is lying to you (and how to calculate the real cost)

I see a lot of buyers (especially first-timers) look at a listing on Zillow or Redfin, see the Principal & Interest (P&I) payment, and think "I can afford that."

But in 2026, P&I is only half the story.

When you factor in:
- Property taxes (which often get reassessed after purchase)
- Homeowners insurance (rising fast in many states)
- PMI (if down payment is under 20%)
- HOA fees
- Maintenance reserves (1-2% of home value)

...the real monthly cost is often 30-40% higher than what the listing shows. Lenders qualify you on PITI, but they don't care if you have money left for a new roof.

I built a free, privacy-first calculator that shows the "True Cost" (including maintenance and utilities) so buyers don't get blindsided. It runs 100% in your browser—no sign-up, no data tracking.

If you're in the market right now, how are you budgeting for these hidden costs?

You can check the calculator here: https://smartmortgagecalc.space/true-cost
 
Back
Top