Wrong vs right
Do not assume two percentages are comparable just because the numbers look close. Align the dollar amount each one uses and the month-or-year convention, then compare size. Mortgage Basics points to where people usually trip.
Why rechecking math is not enough
Recalculating the same wrong setup does not help. When two apps disagree, they are often using one set of definitions and another—not different rounding on the same problem.
Common mix-up
Percentage points are not the same as percent change. A monthly fee is not comparable to an annual rate until you convert. Write both time units in the same form before you debate.
What went wrong
Same digits, different meaning Line up amount and period, then compare
Try a wrong balance once
Core lesson
Go deeper: Mortgage Basics. Use the calculators below with your own loan or bill numbers, not only the examples on this page.
Use the calculator
FAQ
- Where is the main lesson?
Mortgage Basics pulls the topic together in one place, with links to related lessons.
- Which calculator should I open first?
Use the first tool in the list for most questions. If you are reconciling payment rows on a schedule, pick amortization when it appears in the list.