| Cost bucket | What it is | Where to read deeper |
|---|---|---|
| Note rate | Contract interest on the unpaid balance | Interest calculation |
| APR | Annualized cost including many finance charges | Points & fees |
| PMI / MI | Insurance on high-LTV conventional (borrower-paid vs lender-paid paths) | PMI removal |
| Closing & third-party | Title, recording, appraisal, prepaid per-diem, escrows | Break-even on refi |
Updated May 2026. APR is a comparator, not a crystal ball—your hold period and tax situation still determine realized cost.
APR vs note rate (borrower takeaway)
Use APR to sort similar structures on the Loan Estimate. If one offer buys down rate with points, APR rises unless the rate drop offsets within your horizon—model months-to-recover using the break-even framework alongside APR.
PMI as a cost line, not an afterthought
PMI changes front-end housing math until removed. Treat PMI dollars like interest when comparing paydown vs refinance vs equity-based alternatives.