📚 2026 Complete Guide to US Mortgage PITI, Private Mortgage Insurance (PMI), and Refinance Breakeven Math
When budgeting for a home purchase in the United States, focusing solely on Principal and Interest (P&I) often leads to payment shock. Lenders underwrite your mortgage using PITI (Principal, Interest, Property Taxes, and Homeowners Insurance) plus HOA dues and Private Mortgage Insurance (PMI) if your down payment is below 20% on a conventional loan. Under the federal Homeowners Protection Act, borrowers can request PMI cancellation once their loan-to-value (LTV) ratio reaches 80%, and lenders must automatically terminate PMI at 78% LTV.
When Does Refinancing a Mortgage Make Financial Sense?
A rate-and-term refinance is mathematically advantageous when your Breakeven Period (Total Closing Costs divided by Monthly Payment Reduction) is shorter than the remaining time you plan to stay in the home. Typically, a rate drop of 0.75% to 1.25% produces a breakeven timeline between 11 and 18 months.