Research Center
Original research on how mortgages actually work, each study built on a named dataset, a stated methodology, published calculations and an explicit limitations section. If a number cannot be sourced or reproduced, it is not here.
Mortgage Rate Research
How a rate move of half a point reprices a payment and lifetime interest — and how state anchors sit around the national benchmark.
Mortgage Affordability Research
What home price the 28/36 rule supports at a range of incomes and rates.
Property Tax Research
Effective property-tax rates by state and what the spread costs on the same home.
Insurance Cost Research
How homeowners insurance and mortgage insurance land in a monthly payment.
PMI Research
What mortgage insurance costs by LTV band and how long it stays.
Rent vs Buy Research
Break-even sensitivity to rent, rate, appreciation and horizon.
Down Payment Research
The full 3%–30% ladder: cash required, PMI and lifetime cost.
Editorial standard. Every study states its research question, dataset, methodology, sources, calculations, findings and limitations, and carries a last-updated date and change history. Research is updated on a set schedule, not stamped with fake freshness. Questions or corrections: admin@truepiti.com.
Last updated: 2026-09-21.